mirror of https://github.com/xemu-project/xemu.git
A fix for preallocated truncation, a new iotest, and a fix to make the iotests work more comfortably on ppc64
-----BEGIN PGP SIGNATURE----- iQEcBAABAgAGBQJaw6CJAAoJEPQH2wBh1c9AZvcIAL51TsxzLBfYbEr7t/OqaYcT KptgkLn8UPUsVwEaZ1i9T+qpPqUhCgUeqBki4wTpGOfwmRO633L81lhlvLU1RD5f a9qsIWtvG0eYw+BU4P+ojltufdeQRQMxuLVhoiq2ur9vC8zUy6tEnF+yqOdWHYsm 83Z2T/NFZ192zIwPD3Rq9/+ijllJOhODrHdAcnwBp0IuvlXi5FV7GjccB4scW/Ym LwDe7cNWv0XlzRlosyhTRs0HiOm+XiLAj5t9dVKFiuZsUwGFEXx6GiRtUutDf1j8 5ham2wiYLsvxnSgRoUk486Txuj2ceNYDOvnllSv3uFh2kZyTaYewOL1acQFmtVw= =5AX/ -----END PGP SIGNATURE----- Merge remote-tracking branch 'mreitz/tags/pull-block-2018-04-03' into queue-block A fix for preallocated truncation, a new iotest, and a fix to make the iotests work more comfortably on ppc64 # gpg: Signature made Tue Apr 3 17:40:57 2018 CEST # gpg: using RSA key F407DB0061D5CF40 # gpg: Good signature from "Max Reitz <mreitz@redhat.com>" # Primary key fingerprint: 91BE B60A 30DB 3E88 57D1 1829 F407 DB00 61D5 CF40 * mreitz/tags/pull-block-2018-04-03: iotests: Test abnormally large size in compressed cluster descriptor qemu-iotests: Use ppc64 qemu_arch on ppc64le host iotests: Test preallocated truncate of 2G image block/file-posix: Fix fully preallocated truncate Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf
commit
9c1386d3ff
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@ -1701,6 +1701,7 @@ static int raw_regular_truncate(int fd, int64_t offset, PreallocMode prealloc,
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case PREALLOC_MODE_FULL:
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{
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int64_t num = 0, left = offset - current_length;
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off_t seek_result;
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/*
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* Knowing the final size from the beginning could allow the file
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@ -1715,8 +1716,8 @@ static int raw_regular_truncate(int fd, int64_t offset, PreallocMode prealloc,
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buf = g_malloc0(65536);
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result = lseek(fd, current_length, SEEK_SET);
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if (result < 0) {
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seek_result = lseek(fd, current_length, SEEK_SET);
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if (seek_result < 0) {
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result = -errno;
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error_setg_errno(errp, -result,
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"Failed to seek to the old end of file");
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@ -86,6 +86,30 @@ for growth_mode in falloc full off; do
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$QEMU_IMG resize -f "$IMGFMT" --shrink --preallocation=$growth_mode "$TEST_IMG" -${GROWTH_SIZE}K
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done
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echo
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echo '=== Testing image growth on 2G empty image ==='
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for growth_mode in falloc full; do
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echo
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echo "--- growth_mode=$growth_mode ---"
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# Maybe we want to do an lseek() to the end of the file before the
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# preallocation; if the file has a length of 2 GB, that would
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# return an integer that overflows to negative when put into a
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# plain int. We should use the correct type for the result, and
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# this tests we do.
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_make_test_img 2G
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$QEMU_IMG resize -f "$IMGFMT" --preallocation=$growth_mode "$TEST_IMG" +${GROWTH_SIZE}K
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actual_size=$($QEMU_IMG info -f "$IMGFMT" "$TEST_IMG" | grep 'disk size')
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actual_size=$(echo "$actual_size" | sed -e 's/^[^0-9]*\([0-9]\+\).*$/\1/')
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if [ $actual_size -lt $GROWTH_SIZE ]; then
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echo "ERROR: Image should have at least ${GROWTH_SIZE}K, but has ${actual_size}K"
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fi
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done
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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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@ -47,4 +47,14 @@ qemu-img: Preallocation can only be used for growing images
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--- growth_mode=off ---
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Image resized.
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=== Testing image growth on 2G empty image ===
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--- growth_mode=falloc ---
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=2147483648
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Image resized.
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--- growth_mode=full ---
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=2147483648
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Image resized.
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*** done
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@ -129,6 +129,53 @@ $QEMU_IO -c "read -P 0x44 1023k 1k" "$TEST_IMG" 2>&1 | _filter_qemu_io | _fil
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$QEMU_IO -c "read -P 0 1024k 1022k" "$TEST_IMG" 2>&1 | _filter_qemu_io | _filter_testdir
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echo
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echo "=== Corrupted size field in compressed cluster descriptor ==="
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echo
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# Create an empty image and fill half of it with compressed data.
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# The L2 entries of the two compressed clusters are located at
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# 0x800000 and 0x800008, their original values are 0x4008000000a00000
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# and 0x4008000000a00802 (5 sectors for compressed data each).
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_make_test_img 8M -o cluster_size=2M
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$QEMU_IO -c "write -c -P 0x11 0 2M" -c "write -c -P 0x11 2M 2M" "$TEST_IMG" \
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2>&1 | _filter_qemu_io | _filter_testdir
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# Reduce size of compressed data to 4 sectors: this corrupts the image.
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poke_file "$TEST_IMG" $((0x800000)) "\x40\x06"
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$QEMU_IO -c "read -P 0x11 0 4M" "$TEST_IMG" 2>&1 | _filter_qemu_io | _filter_testdir
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# 'qemu-img check' however doesn't see anything wrong because it
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# doesn't try to decompress the data and the refcounts are consistent.
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# TODO: update qemu-img so this can be detected.
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_check_test_img
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# Increase size of compressed data to the maximum (8192 sectors).
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# This makes QEMU read more data (8192 sectors instead of 5, host
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# addresses [0xa00000, 0xdfffff]), but the decompression algorithm
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# stops once we have enough to restore the uncompressed cluster, so
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# the rest of the data is ignored.
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poke_file "$TEST_IMG" $((0x800000)) "\x7f\xfe"
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# Do it also for the second compressed cluster (L2 entry at 0x800008).
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# In this case the compressed data would span 3 host clusters
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# (host addresses: [0xa00802, 0xe00801])
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poke_file "$TEST_IMG" $((0x800008)) "\x7f\xfe"
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# Here the image is too small so we're asking QEMU to read beyond the
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# end of the image.
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$QEMU_IO -c "read -P 0x11 0 4M" "$TEST_IMG" 2>&1 | _filter_qemu_io | _filter_testdir
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# But if we grow the image we won't be reading beyond its end anymore.
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$QEMU_IO -c "write -P 0x22 4M 4M" "$TEST_IMG" 2>&1 | _filter_qemu_io | _filter_testdir
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$QEMU_IO -c "read -P 0x11 0 4M" "$TEST_IMG" 2>&1 | _filter_qemu_io | _filter_testdir
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# The refcount data is however wrong because due to the increased size
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# of the compressed data it now reaches the following host clusters.
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# This can be repaired by qemu-img check by increasing the refcount of
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# those clusters.
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# TODO: update qemu-img to correct the compressed cluster size instead.
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_check_test_img -r all
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$QEMU_IO -c "read -P 0x11 0 4M" "$TEST_IMG" 2>&1 | _filter_qemu_io | _filter_testdir
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$QEMU_IO -c "read -P 0x22 4M 4M" "$TEST_IMG" 2>&1 | _filter_qemu_io | _filter_testdir
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echo
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echo "=== Full allocation with -S 0 ==="
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echo
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@ -99,6 +99,39 @@ read 1024/1024 bytes at offset 1047552
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read 1046528/1046528 bytes at offset 1048576
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1022 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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=== Corrupted size field in compressed cluster descriptor ===
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=8388608
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wrote 2097152/2097152 bytes at offset 0
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2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 2097152/2097152 bytes at offset 2097152
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2 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read failed: Input/output error
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No errors were found on the image.
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read 4194304/4194304 bytes at offset 0
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4 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 4194304/4194304 bytes at offset 4194304
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4 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 4194304/4194304 bytes at offset 0
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4 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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ERROR cluster 6 refcount=1 reference=3
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ERROR cluster 7 refcount=1 reference=2
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Repairing cluster 6 refcount=1 reference=3
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Repairing cluster 7 refcount=1 reference=2
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Repairing OFLAG_COPIED data cluster: l2_entry=8000000000c00000 refcount=3
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Repairing OFLAG_COPIED data cluster: l2_entry=8000000000e00000 refcount=2
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The following inconsistencies were found and repaired:
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0 leaked clusters
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4 corruptions
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Double checking the fixed image now...
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No errors were found on the image.
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read 4194304/4194304 bytes at offset 0
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4 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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read 4194304/4194304 bytes at offset 4194304
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4 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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=== Full allocation with -S 0 ===
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Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864
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@ -538,8 +538,8 @@ if [ -z "$QEMU_PROG" ]
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then
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if [ -x "$build_iotests/qemu" ]; then
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export QEMU_PROG="$build_iotests/qemu"
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elif [ -x "$build_root/$arch-softmmu/qemu-system-$arch" ]; then
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export QEMU_PROG="$build_root/$arch-softmmu/qemu-system-$arch"
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elif [ -x "$build_root/${qemu_arch}-softmmu/qemu-system-${qemu_arch}" ]; then
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export QEMU_PROG="$build_root/${qemu_arch}-softmmu/qemu-system-${qemu_arch}"
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else
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pushd "$build_root" > /dev/null
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for binary in *-softmmu/qemu-system-*
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@ -23,6 +23,7 @@ PATH=".:$PATH"
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HOSTOS=`uname -s`
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arch=`uname -m`
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[[ "$arch" =~ "ppc64" ]] && qemu_arch=ppc64 || qemu_arch="$arch"
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export PWD=`pwd`
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