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From 3dba07a26692093927c017046a8ea10f94892e67 Mon Sep 17 00:00:00 2001
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From: Max Reitz <mreitz@redhat.com>
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Date: Mon, 18 Jun 2018 14:53:37 +0200
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Subject: [PATCH 156/268] iotests: Add creation test to 153
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RH-Author: Max Reitz <mreitz@redhat.com>
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Message-id: <20180618145337.633-4-mreitz@redhat.com>
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Patchwork-id: 80752
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O-Subject: [RHV-7.6 qemu-kvm-rhev PATCH 3/3] iotests: Add creation test to 153
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Bugzilla: 1519144
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Fam Zheng <famz@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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This patch adds a test case to 153 which tries to overwrite an image
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(using qemu-img create) while it is in use. Without the original user
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explicitly sharing the necessary permissions (writing and truncation),
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this should not be allowed.
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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Reviewed-by: Fam Zheng <famz@redhat.com>
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Message-id: 20180509215336.31304-4-mreitz@redhat.com
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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(cherry picked from commit f45b638f9f967cdbea4e24704bd16a858ddcde03)
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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tests/qemu-iotests/153 | 18 ++++++++++++++++++
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tests/qemu-iotests/153.out | 13 +++++++++++++
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2 files changed, 31 insertions(+)
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diff --git a/tests/qemu-iotests/153 b/tests/qemu-iotests/153
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index ec508c7..673813c 100755
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--- a/tests/qemu-iotests/153
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+++ b/tests/qemu-iotests/153
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@@ -137,6 +137,24 @@ for opts1 in "" "read-only=on" "read-only=on,force-share=on"; do
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_run_cmd $QEMU_IMG dd $L if="${TEST_IMG}" of="${TEST_IMG}.convert" bs=512 count=1
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_run_cmd $QEMU_IMG bench $L -c 1 "${TEST_IMG}"
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_run_cmd $QEMU_IMG bench $L -w -c 1 "${TEST_IMG}"
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+
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+ # qemu-img create does not support -U
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+ if [ -z "$L" ]; then
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+ _run_cmd $QEMU_IMG create -f $IMGFMT "${TEST_IMG}" \
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+ -b ${TEST_IMG}.base
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+ # Read the file format. It used to be the case that
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+ # file-posix simply truncated the file, but the qcow2
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+ # driver then failed to format it because it was unable
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+ # to acquire the necessary WRITE permission. However, the
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+ # truncation was already wrong, and the whole process
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+ # resulted in the file being completely empty and thus its
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+ # format would be detected to be raw.
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+ # So we read it here to see that creation either completed
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+ # successfully (thus the format is qcow2) or it aborted
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+ # before the file was changed at all (thus the format stays
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+ # qcow2).
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+ _img_info -U | grep 'file format'
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+ fi
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done
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_send_qemu_cmd $h "{ 'execute': 'quit', }" ""
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echo
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diff --git a/tests/qemu-iotests/153.out b/tests/qemu-iotests/153.out
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index 2510762..3492ba7 100644
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--- a/tests/qemu-iotests/153.out
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+++ b/tests/qemu-iotests/153.out
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@@ -92,6 +92,11 @@ _qemu_img_wrapper bench -w -c 1 TEST_DIR/t.qcow2
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qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock
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Is another process using the image?
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+_qemu_img_wrapper create -f qcow2 TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base
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+qemu-img: TEST_DIR/t.qcow2: Failed to get "write" lock
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+Is another process using the image?
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+file format: IMGFMT
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+
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== Running utility commands -U ==
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_qemu_io_wrapper -U -c read 0 512 TEST_DIR/t.qcow2
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@@ -209,6 +214,11 @@ _qemu_img_wrapper bench -w -c 1 TEST_DIR/t.qcow2
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qemu-img: Could not open 'TEST_DIR/t.qcow2': Failed to get "write" lock
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Is another process using the image?
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+_qemu_img_wrapper create -f qcow2 TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base
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+qemu-img: TEST_DIR/t.qcow2: Failed to get "write" lock
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+Is another process using the image?
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+file format: IMGFMT
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+
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== Running utility commands -U ==
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_qemu_io_wrapper -U -c read 0 512 TEST_DIR/t.qcow2
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@@ -309,6 +319,9 @@ _qemu_img_wrapper bench -c 1 TEST_DIR/t.qcow2
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_qemu_img_wrapper bench -w -c 1 TEST_DIR/t.qcow2
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+_qemu_img_wrapper create -f qcow2 TEST_DIR/t.qcow2 -b TEST_DIR/t.qcow2.base
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+file format: IMGFMT
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+
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== Running utility commands -U ==
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_qemu_io_wrapper -U -c read 0 512 TEST_DIR/t.qcow2
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--
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1.8.3.1
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