1#!/bin/bash 2# 3# Test qemu-nbd vs. unaligned images 4# 5# Copyright (C) 2018-2019 Red Hat, Inc. 6# 7# This program is free software; you can redistribute it and/or modify 8# it under the terms of the GNU General Public License as published by 9# the Free Software Foundation; either version 2 of the License, or 10# (at your option) any later version. 11# 12# This program is distributed in the hope that it will be useful, 13# but WITHOUT ANY WARRANTY; without even the implied warranty of 14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15# GNU General Public License for more details. 16# 17# You should have received a copy of the GNU General Public License 18# along with this program. If not, see <http://www.gnu.org/licenses/>. 19# 20 21seq="$(basename $0)" 22echo "QA output created by $seq" 23 24status=1 # failure is the default! 25 26nbd_unix_socket=$TEST_DIR/test_qemu_nbd_socket 27 28_cleanup() 29{ 30 _cleanup_test_img 31 nbd_server_stop 32} 33trap "_cleanup; exit \$status" 0 1 2 3 15 34 35# get standard environment, filters and checks 36. ./common.rc 37. ./common.filter 38. ./common.nbd 39 40_supported_fmt raw 41_supported_proto nbd 42_supported_os Linux 43_require_command QEMU_NBD 44 45# can't use _make_test_img, because qemu-img rounds image size up, 46# and because we want to use Unix socket rather than TCP port. Likewise, 47# we have to redirect TEST_IMG to our server. 48# This tests that we can deal with the hole at the end of an unaligned 49# raw file (either because the server doesn't advertise alignment too 50# large, or because the client ignores the server's noncompliance - even 51# though we can't actually wire iotests into checking trace messages). 52printf %01000d 0 > "$TEST_IMG_FILE" 53TEST_IMG="nbd:unix:$nbd_unix_socket" 54 55echo 56echo "=== Exporting unaligned raw image, natural alignment ===" 57echo 58 59nbd_server_start_unix_socket -f $IMGFMT "$TEST_IMG_FILE" 60 61$QEMU_NBD_PROG --list -k $nbd_unix_socket | grep '\(size\|min\)' 62$QEMU_IMG map -f raw --output=json "$TEST_IMG" | _filter_qemu_img_map 63$QEMU_IO -f raw -c map "$TEST_IMG" 64nbd_server_stop 65 66echo 67echo "=== Exporting unaligned raw image, forced server sector alignment ===" 68echo 69 70# Intentionally omit '-f' to force image probing, which in turn forces 71# sector alignment, here at the server. 72nbd_server_start_unix_socket "$TEST_IMG_FILE" 73 74$QEMU_NBD_PROG --list -k $nbd_unix_socket | grep '\(size\|min\)' 75$QEMU_IMG map -f raw --output=json "$TEST_IMG" | _filter_qemu_img_map 76$QEMU_IO -f raw -c map "$TEST_IMG" 77nbd_server_stop 78 79echo 80echo "=== Exporting unaligned raw image, forced client sector alignment ===" 81echo 82 83# Now force sector alignment at the client. 84nbd_server_start_unix_socket -f $IMGFMT "$TEST_IMG_FILE" 85 86$QEMU_NBD_PROG --list -k $nbd_unix_socket | grep '\(size\|min\)' 87$QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map 88$QEMU_IO -c map "$TEST_IMG" 89nbd_server_stop 90 91# Not tested yet: we also want to ensure that qemu as NBD client does 92# not access beyond the end of a server's advertised unaligned size: 93# nbdkit -U - memory size=513 --run 'qemu-io -f raw -c "r 512 512" $nbd' 94# However, since qemu as server always rounds up to a sector alignment, 95# we would have to use nbdkit to provoke the current client failures. 96 97# success, all done 98echo '*** done' 99rm -f $seq.full 100status=0 101