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iotests/138: Test leaks/corruptions fixed report

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Test that qemu-img check reports the number of leaks and corruptions
fixed in its JSON report (after a successful run).

While touching the _unsupported_imgopts line, adjust the note on why
data_file does not work with this test: The current comment sounds a bit
like it is a mistake for qemu-img check not to check external data
files' refcounts.  But there are no such refcounts, so it is no mistake.
Just say that qemu-img check does not do much for external data files,
and this is why this test does not work with them.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200324172757.1173824-4-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Max Reitz 2020-03-24 18:27:57 +01:00
parent 2f8bb28ff0
commit a507c51790
2 changed files with 53 additions and 2 deletions
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41
tests/qemu-iotests/138
View File

@ -41,8 +41,10 @@ _supported_fmt qcow2
_supported_proto file
_supported_os Linux
# With an external data file, data clusters are not refcounted
# (and so qemu-img check does not check their refcount)
_unsupported_imgopts data_file
# (so qemu-img check would not do much);
# we want to modify the refcounts, so we need them to have a specific
# format (namely u16)
_unsupported_imgopts data_file 'refcount_bits=\([^1]\|.\([^6]\|$\)\)'
echo
echo '=== Check on an image with a multiple of 2^32 clusters ==='
@ -65,6 +67,41 @@ poke_file "$TEST_IMG" $((2048 + 8)) "\x00\x80\x00\x00\x00\x00\x00\x00"
# allocate memory", we have an error showing that l2 entry is invalid.
_check_test_img
echo
echo '=== Check leaks-fixed/corruptions-fixed report'
echo
# After leaks and corruptions were fixed, those numbers should be
# reported by qemu-img check
_make_test_img 64k
# Allocate data cluster
$QEMU_IO -c 'write 0 64k' "$TEST_IMG" | _filter_qemu_io
reftable_ofs=$(peek_file_be "$TEST_IMG" 48 8)
refblock_ofs=$(peek_file_be "$TEST_IMG" $reftable_ofs 8)
# Introduce a leak: Make the image header's refcount 2
poke_file_be "$TEST_IMG" "$refblock_ofs" 2 2
l1_ofs=$(peek_file_be "$TEST_IMG" 40 8)
# Introduce a corruption: Drop the COPIED flag from the (first) L1 entry
l1_entry=$(peek_file_be "$TEST_IMG" $l1_ofs 8)
l1_entry=$((l1_entry & ~(1 << 63)))
poke_file_be "$TEST_IMG" $l1_ofs 8 $l1_entry
echo
# Should print the number of corruptions and leaks fixed
# (Filter out all JSON fields (recognizable by their four-space
# indentation), but keep the "-fixed" fields (by removing two spaces
# from their indentation))
# (Also filter out the L1 entry, because why not)
_check_test_img -r all --output=json \
| sed -e 's/^ \(.*\)-fixed"/\1-fixed"/' \
-e '/^ /d' \
-e "s/\\([^0-9a-f]\\)$(printf %x $l1_entry)\\([^0-9a-f]\\)/\1L1_ENTRY_VALUE\2/"
# success, all done
echo "*** done"
rm -f $seq.full

14
tests/qemu-iotests/138.out
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@ -9,4 +9,18 @@ ERROR: counting reference for region exceeding the end of the file by one cluste
1 errors were found on the image.
Data may be corrupted, or further writes to the image may corrupt it.
=== Check leaks-fixed/corruptions-fixed report
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=65536
wrote 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
Leaked cluster 0 refcount=2 reference=1
Repairing cluster 0 refcount=2 reference=1
Repairing OFLAG_COPIED L2 cluster: l1_index=0 l1_entry=L1_ENTRY_VALUE refcount=1
{
"corruptions-fixed": 1,
"leaks-fixed": 1,
}
*** done