Commit ae376c62 authored by Kevin Wolf's avatar Kevin Wolf
Browse files

qemu-iotests: Test qcow2 not leaking clusters on write error 



This adds a test for a temporary write failure, which simulates the
situation after werror=stop/enospc has stopped the VM. We shouldn't
leave leaked clusters behind in such cases.

Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
Reviewed-by: default avatarMax Reitz <mreitz@redhat.com>
parent 8b24cd14

tests/qemu-iotests/026

+17 −0
Original line number Diff line number Diff line
@@ -200,6 +200,23 @@ done 
done

done



echo

echo === Avoid cluster leaks after temporary failure ===

echo



cat > "$TEST_DIR/blkdebug.conf" <<EOF

[inject-error]

event = "write_aio"

errno = "5"

once = "on"

EOF



# After the failed first write, do a second write so that the updated refcount

# block is actually written back

_make_test_img 64M

$QEMU_IO -c "write 0 1M" -c "write 0 1M" "$BLKDBG_TEST_IMG" | _filter_qemu_io

_check_test_img



# success, all done

echo "*** done"

rm -f $seq.full

tests/qemu-iotests/026.out

+8 −0
Original line number Diff line number Diff line
@@ -675,4 +675,12 @@ write failed: No space left on device 


96 leaked clusters were found on the image.

This means waste of disk space, but no harm to data.



=== Avoid cluster leaks after temporary failure ===



Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864

write failed: Input/output error

wrote 1048576/1048576 bytes at offset 0

1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

No errors were found on the image.

*** done

tests/qemu-iotests/026.out.nocache

+8 −0
Original line number Diff line number Diff line
@@ -683,4 +683,12 @@ write failed: No space left on device 


96 leaked clusters were found on the image.

This means waste of disk space, but no harm to data.



=== Avoid cluster leaks after temporary failure ===



Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864

write failed: Input/output error

wrote 1048576/1048576 bytes at offset 0

1 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)

No errors were found on the image.

*** done