cb7223ac33
nbd_server_start_unix_socket() includes an implicit nbd_server_stop(), but we still need an explicit one at the end of the test (where there follows no next nbd_server_start_unix_socket()), or qemu-nbd will linger until the test exits. This will become important when enabling this test to run on FUSE exports, because then the export (which is the image used by qemu-nbd) will go away before qemu-nbd exits, which will lead to qemu-nbd complaining that it cannot flush the bitmaps in the image. Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <20201027164416.144115-3-mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com>
137 lines
4.6 KiB
Bash
Executable File
137 lines
4.6 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# Test qemu-img bitmap handling
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#
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# Copyright (C) 2018-2020 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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seq="$(basename $0)"
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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nbd_server_stop
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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# get standard environment, filters and checks
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. ./common.rc
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. ./common.filter
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. ./common.nbd
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_supported_fmt qcow2
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_supported_proto file
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_supported_os Linux
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_require_command QEMU_NBD
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# compat=0.10 does not support bitmaps
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_unsupported_imgopts 'compat=0.10'
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# Filter irrelevant format-specific information from the qemu-img info
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# output (we only want the bitmaps, basically)
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_filter_irrelevant_img_info()
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{
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grep -v -e 'compat' -e 'compression type' -e 'data file' -e 'extended l2' \
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-e 'lazy refcounts' -e 'refcount bits'
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}
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echo
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echo "=== Initial image setup ==="
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echo
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# Create backing image with one bitmap
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TEST_IMG="$TEST_IMG.base" _make_test_img 10M
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$QEMU_IMG bitmap --add -f $IMGFMT "$TEST_IMG.base" b0
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$QEMU_IO -c 'w 3M 1M' -f $IMGFMT "$TEST_IMG.base" | _filter_qemu_io
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# Create initial image and populate two bitmaps: one active, one inactive.
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ORIG_IMG=$TEST_IMG
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TEST_IMG=$TEST_IMG.orig
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_make_test_img -b "$ORIG_IMG.base" -F $IMGFMT 10M
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$QEMU_IO -c 'w 0 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
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$QEMU_IMG bitmap --add -g 512k -f $IMGFMT "$TEST_IMG" b1
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$QEMU_IMG bitmap --add --disable -f $IMGFMT "$TEST_IMG" b2
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$QEMU_IO -c 'w 3M 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
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$QEMU_IMG bitmap --clear -f $IMGFMT "$TEST_IMG" b1
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$QEMU_IO -c 'w 1M 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
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$QEMU_IMG bitmap --disable -f $IMGFMT "$TEST_IMG" b1
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$QEMU_IMG bitmap --enable -f $IMGFMT "$TEST_IMG" b2
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$QEMU_IO -c 'w 2M 1M' -f $IMGFMT "$TEST_IMG" | _filter_qemu_io
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echo
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echo "=== Bitmap preservation not possible to non-qcow2 ==="
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echo
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TEST_IMG=$ORIG_IMG
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$QEMU_IMG convert --bitmaps -O raw "$TEST_IMG.orig" "$TEST_IMG" &&
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echo "unexpected success"
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echo
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echo "=== Convert with bitmap preservation ==="
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echo
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# Only bitmaps from the active layer are copied
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$QEMU_IMG convert --bitmaps -O qcow2 "$TEST_IMG.orig" "$TEST_IMG"
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_img_info --format-specific | _filter_irrelevant_img_info
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# But we can also merge in bitmaps from other layers. This test is a bit
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# contrived to cover more code paths, in reality, you could merge directly
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# into b0 without going through tmp
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$QEMU_IMG bitmap --add --disable -f $IMGFMT "$TEST_IMG" b0
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$QEMU_IMG bitmap --add --merge b0 -b "$TEST_IMG.base" -F $IMGFMT \
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-f $IMGFMT "$TEST_IMG" tmp
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$QEMU_IMG bitmap --merge tmp -f $IMGFMT "$TEST_IMG" b0
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$QEMU_IMG bitmap --remove --image-opts \
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driver=$IMGFMT,file.driver=file,file.filename="$TEST_IMG" tmp
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_img_info --format-specific | _filter_irrelevant_img_info
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echo
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echo "=== Merge from top layer into backing image ==="
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echo
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$QEMU_IMG rebase -u -F qcow2 -b "$TEST_IMG.base" "$TEST_IMG"
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$QEMU_IMG bitmap --add --merge b2 -b "$TEST_IMG" -F $IMGFMT \
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-f $IMGFMT "$TEST_IMG.base" b3
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_img_info --format-specific --backing-chain | _filter_irrelevant_img_info
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echo
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echo "=== Check bitmap contents ==="
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echo
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# x-dirty-bitmap is a hack for reading bitmaps; it abuses block status to
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# report "data":false for portions of the bitmap which are set
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IMG="driver=nbd,server.type=unix,server.path=$nbd_unix_socket"
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nbd_server_start_unix_socket -r -f qcow2 -B b0 "$TEST_IMG"
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$QEMU_IMG map --output=json --image-opts \
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"$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b0" | _filter_qemu_img_map
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nbd_server_start_unix_socket -r -f qcow2 -B b1 "$TEST_IMG"
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$QEMU_IMG map --output=json --image-opts \
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"$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b1" | _filter_qemu_img_map
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nbd_server_start_unix_socket -r -f qcow2 -B b2 "$TEST_IMG"
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$QEMU_IMG map --output=json --image-opts \
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"$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b2" | _filter_qemu_img_map
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nbd_server_start_unix_socket -r -f qcow2 -B b3 "$TEST_IMG"
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$QEMU_IMG map --output=json --image-opts \
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"$IMG,x-dirty-bitmap=qemu:dirty-bitmap:b3" | _filter_qemu_img_map
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nbd_server_stop
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# success, all done
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echo '*** done'
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rm -f $seq.full
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status=0
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