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#!/usr/bin/env bash
set -E
setup() {
# volume and file sizes are specifically chosen so that naive copy will not have enough space
fallocate -l 200M .btrfs.img
mkfs.btrfs -f .btrfs.img
mkdir -p .btrfs-mnt
sudo mount -o loop .btrfs.img .btrfs-mnt
sudo chmod a+rwx .btrfs-mnt
cat /dev/random | head -c 50M > .btrfs-mnt/src.bin
# chopping 16K from start and 16K from end
cat .btrfs-mnt/src.bin | tail -c +16K | tail -c +2 | head -c -16K > .btrfs-mnt/src-part.bin
}
test() {
cargo test
diff -q .btrfs-mnt/src.bin .btrfs-mnt/dest.bin
diff -q .btrfs-mnt/src-part.bin .btrfs-mnt/dest-part.bin
diff -q .btrfs-mnt/clone-range-small.bin .btrfs-mnt/copy-range-small.bin
}
teardown() {
code=$?
trap - ERR
sudo umount .btrfs-mnt
rm -r .btrfs-mnt
rm .btrfs.img
exit $code
}
setup
trap teardown ERR
test
teardown
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