qemu-patch-raspberry4/tests/acceptance/virtiofs_submounts.py.data/host.sh
Max Reitz af1bb3fe7f tests/acceptance: Add virtiofs_submounts.py
This test invokes several shell scripts to create a random directory
tree full of submounts, and then check in the VM whether every submount
has its own ID and the structure looks as expected.

(Note that the test scripts must be non-executable, so Avocado will not
try to execute them as if they were tests on their own, too.)

Because at this commit's date it is unlikely that the Linux kernel on
the image provided by boot_linux.py supports submounts in virtio-fs, the
test will be cancelled if no custom Linux binary is provided through the
vmlinuz parameter.  (The on-image kernel can be used by providing an
empty string via vmlinuz=.)

So, invoking the test can be done as follows:
$ avocado run \
    tests/acceptance/virtiofs_submounts.py \
    -p vmlinuz=/path/to/linux/build/arch/x86/boot/bzImage

This test requires root privileges (through passwordless sudo -n),
because at this point, virtiofsd requires them.  (If you have a
timestamp_timeout period for sudoers (e.g. the default of 5 min), you
can provide this by executing something like "sudo true" before invoking
Avocado.)

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20201102161859.156603-8-mreitz@redhat.com>
Tested-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2020-11-02 19:23:48 +00:00

128 lines
2.4 KiB
Bash

#!/bin/bash
mount_count=128
function print_usage()
{
if [ -n "$2" ]; then
echo "Error: $2"
echo
fi
echo "Usage: $1 <scratch dir> [seed]"
echo "(If no seed is given, it will be randomly generated.)"
}
scratch_dir=$1
if [ -z "$scratch_dir" ]; then
print_usage "$0" 'No scratch dir given' >&2
exit 1
fi
if [ ! -d "$scratch_dir" ]; then
print_usage "$0" "$scratch_dir is not a directory" >&2
exit 1
fi
seed=$2
if [ -z "$seed" ]; then
seed=$RANDOM
fi
RANDOM=$seed
echo "Seed: $seed"
set -e
shopt -s nullglob
cd "$scratch_dir"
if [ -d share ]; then
echo 'Error: This directory seems to be in use already' >&2
exit 1
fi
for ((i = 0; i < $mount_count; i++)); do
printf "Setting up fs %i/%i...\r" "$((i + 1))" "$mount_count"
rm -f fs$i.img
truncate -s 512M fs$i.img
mkfs.xfs -q fs$i.img
devs[i]=$(sudo losetup -f --show fs$i.img)
done
echo
top_level_mounts=$((RANDOM % mount_count + 1))
mkdir -p share
echo 'root' > share/some-file
for ((i = 0; i < $top_level_mounts; i++)); do
printf "Mounting fs %i/%i...\r" "$((i + 1))" "$mount_count"
mkdir -p share/mnt$i
touch share/mnt$i/not-mounted
sudo mount "${devs[i]}" share/mnt$i
sudo chown "$(id -u):$(id -g)" share/mnt$i
pushd share/mnt$i >/dev/null
path=mnt$i
nesting=$((RANDOM % 4))
for ((j = 0; j < $nesting; j++)); do
cat > some-file <<EOF
$i
$path
EOF
mkdir sub
cd sub
path="$path/sub"
done
cat > some-file <<EOF
$i
$path
EOF
popd >/dev/null
done
for ((; i < $mount_count; i++)); do
printf "Mounting fs %i/%i...\r" "$((i + 1))" "$mount_count"
mp_i=$((i % top_level_mounts))
pushd share/mnt$mp_i >/dev/null
path=mnt$mp_i
while true; do
sub_mp="$(echo mnt*)"
if cd sub 2>/dev/null; then
path="$path/sub"
elif [ -n "$sub_mp" ] && cd "$sub_mp" 2>/dev/null; then
path="$path/$sub_mp"
else
break
fi
done
mkdir mnt$i
touch mnt$i/not-mounted
sudo mount "${devs[i]}" mnt$i
sudo chown "$(id -u):$(id -g)" mnt$i
cd mnt$i
path="$path/mnt$i"
nesting=$((RANDOM % 4))
for ((j = 0; j < $nesting; j++)); do
cat > some-file <<EOF
$i
$path
EOF
mkdir sub
cd sub
path="$path/sub"
done
cat > some-file <<EOF
$i
$path
EOF
popd >/dev/null
done
echo
echo 'Done.'