block/io.c | 3 + qemu-io-cmds.c | 180 ++++++++++++------ .../tests/detect-zeroes-registered-buf | 58 ++++++ .../tests/detect-zeroes-registered-buf.out | 7 + 4 files changed, 189 insertions(+), 59 deletions(-) create mode 100755 tests/qemu-iotests/tests/detect-zeroes-registered-buf create mode 100644 tests/qemu-iotests/tests/detect-zeroes-registered-buf.out