b41ad73a3b
This adds a test for an I/O error during snapshot deletion, and maybe more importantly, for how to repair the resulting image. If the snapshot has been deleted before the error occurs, the only negative result will be leaked clusters -- and those should be repairable with qemu-img check -r leaks. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 20180509200059.31125-3-mreitz@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
91 lines
2.2 KiB
Bash
Executable file
91 lines
2.2 KiB
Bash
Executable file
#!/bin/bash
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#
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# I/O errors when working with internal qcow2 snapshots, and repairing
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# the result
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#
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# Copyright (C) 2018 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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seq=$(basename $0)
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echo "QA output created by $seq"
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status=1 # failure is the default!
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_cleanup()
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{
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_cleanup_test_img
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rm -f "$TEST_DIR/blkdebug.conf"
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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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# This test is specific to qcow2
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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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# This test needs clusters with at least a refcount of 2 so that
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# OFLAG_COPIED is not set. refcount_bits=1 is therefore unsupported.
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_unsupported_imgopts 'refcount_bits=1[^0-9]'
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echo
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echo '=== Simulating an I/O error during snapshot deletion ==='
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echo
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_make_test_img 64M
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$QEMU_IO -c 'write 0 64k' "$TEST_IMG" | _filter_qemu_io
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# Create the snapshot
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$QEMU_IMG snapshot -c foo "$TEST_IMG"
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# Verify the snapshot is there
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echo
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_img_info | grep 'Snapshot list'
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echo '(Snapshot filtered)'
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echo
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# Try to delete the snapshot (with an error happening when freeing the
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# then leaked clusters)
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cat > "$TEST_DIR/blkdebug.conf" <<EOF
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[inject-error]
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event = "cluster_free"
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errno = "5"
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EOF
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$QEMU_IMG snapshot -d foo "blkdebug:$TEST_DIR/blkdebug.conf:$TEST_IMG"
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# Verify the snapshot is gone
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echo
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_img_info | grep 'Snapshot list'
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# Should only show leaks
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echo '--- Checking test image ---'
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_check_test_img
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echo
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# As there are only leaks, this should be able to fully repair the
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# image
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echo '--- Repairing test image ---'
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_check_test_img -r leaks
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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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