57284d2ada
Many tests (that do not support generic protocols) can run just fine with FUSE-exported images, so allow them to. Note that this is no attempt at being definitely complete. There are some tests that might be modified to run on FUSE, but this patch still skips them. This patch only tries to pick the rather low-hanging fruits. Note that 221 and 250 only pass when .lseek is correctly implemented, which is only possible with a libfuse that is 3.8 or newer. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20201027190600.192171-20-mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
98 lines
3.3 KiB
Bash
Executable file
98 lines
3.3 KiB
Bash
Executable file
#!/usr/bin/env bash
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#
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# max limits on compression in huge qcow2 files
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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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#
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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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}
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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.pattern
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_supported_fmt qcow2
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_supported_proto file fuse
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_supported_os Linux
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# To use a different refcount width but 16 bits we need compat=1.1,
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# and external data files do not support compressed clusters.
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_unsupported_imgopts 'compat=0.10' data_file
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echo "== Creating huge file =="
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# Sanity check: We require a file system that permits the creation
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# of a HUGE (but very sparse) file. tmpfs works, ext4 does not.
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_require_large_file 513T
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_make_test_img -o 'cluster_size=2M,refcount_bits=1' 513T
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echo "== Populating refcounts =="
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# We want an image with 256M refcounts * 2M clusters = 512T referenced.
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# Each 2M cluster holds 16M refcounts; the refcount table initially uses
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# 1 refblock, so we need to add 15 more. The refcount table lives at 2M,
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# first refblock at 4M, L2 at 6M, so our remaining additions start at 8M.
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# Then, for each refblock, mark it as fully populated.
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to_hex() {
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printf %016x\\n $1 | sed 's/\(..\)/\\x\1/g'
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}
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truncate --size=38m "$TEST_IMG"
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entry=$((0x200000))
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$QEMU_IO_PROG -f raw -c "w -P 0xff 4m 2m" "$TEST_IMG" | _filter_qemu_io
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for i in {1..15}; do
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offs=$((0x600000 + i*0x200000))
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poke_file "$TEST_IMG" $((i*8 + entry)) $(to_hex $offs)
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$QEMU_IO_PROG -f raw -c "w -P 0xff $offs 2m" "$TEST_IMG" | _filter_qemu_io
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done
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echo "== Checking file before =="
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# FIXME: 'qemu-img check' doesn't diagnose refcounts beyond the end of
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# the file as leaked clusters
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_check_test_img 2>&1 | sed '/^Leaked cluster/d'
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stat -c 'image size %s' "$TEST_IMG"
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echo "== Trying to write compressed cluster =="
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# Given our file size, the next available cluster at 512T lies beyond the
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# maximum offset that a compressed 2M cluster can reside in
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$QEMU_IO_PROG -c 'w -c 0 2m' "$TEST_IMG" | _filter_qemu_io
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# The attempt failed, but ended up allocating a new refblock
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stat -c 'image size %s' "$TEST_IMG"
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echo "== Writing normal cluster =="
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# The failed write should not corrupt the image, so a normal write succeeds
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$QEMU_IO_PROG -c 'w 0 2m' "$TEST_IMG" | _filter_qemu_io
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echo "== Checking file after =="
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# qemu-img now sees the millions of leaked clusters, thanks to the allocations
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# at 512T. Undo many of our faked references to speed up the check.
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$QEMU_IO_PROG -f raw -c "w -z 5m 1m" -c "w -z 8m 30m" "$TEST_IMG" |
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_filter_qemu_io
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_check_test_img 2>&1 | sed '/^Leaked cluster/d'
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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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