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#!/usr/bin/env bash
# nbd client library in userspace
# Copyright Red Hat
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
# Test zeroing of files using nbdkit sh plugin.
. ../tests/functions.sh
set -e
set -x
# FALLOC_FL_ZERO_RANGE support was added to fuse.ko in Linux 5.14.
requires_linux_kernel_version 5.14
requires_fuse
requires fallocate --version
requires $DD --version
requires $NBDKIT --version
requires $NBDKIT sh --version
# Difficult to arrange for this test to be run this test under
# valgrind, so don't bother.
if [ "x$LIBNBD_VALGRIND" = "x1" ]; then
echo "$0: test skipped under valgrind"
exit 77
fi
mp=test-zero.d
pidfile=test-zero.pid
out=test-zero.out
cleanup_fn fusermount3 -u $mp
cleanup_fn rm -rf $mp $pidfile $out
mkdir $mp
export DD mp pidfile out prog="$0"
$NBDKIT -U - \
sh - \
--run '
set -x
# Run nbdfuse and connect to the nbdkit server.
nbdfuse -P $pidfile $mp --unix $unixsocket &
# Wait for the pidfile to appear.
for i in {1..60}; do
if test -f $pidfile; then
break
fi
sleep 1
done
if ! test -f $pidfile; then
echo "$prog: nbdfuse PID file $pidfile was not created"
exit 1
fi
ls -al $mp
# Fully allocate the disk.
$DD if=/dev/zero of=$mp/nbd bs=512 count=2
# Explicitly zero the second sector.
fallocate -z -l 512 -o 512 $mp/nbd
# We have to explicitly unmount it here else nbdfuse will
# never exit and nbdkit will hang.
fusermount3 -u $mp
' <<'EOF'
# The nbdkit server script.
case "$1" in
get_size) echo 1024 ;;
can_write) ;;
can_trim) ;;
can_zero) ;;
can_fast_zero) ;;
pread) ;;
pwrite) echo "$@" >> $out ;;
trim) echo "$@" >> $out ;;
zero) echo "$@" >> $out ;;
*) exit 2 ;;
esac
EOF
# What commands were sent to nbdkit?
cat $out
grep 'pwrite 512 0' $out
grep 'pwrite 512 512' $out
grep 'zero 512 512' $out
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