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From c8da29122142f498215881e8bb933de278a3809a Mon Sep 17 00:00:00 2001
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From: Max Reitz <mreitz@redhat.com>
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Date: Sun, 29 Dec 2013 22:06:54 +0100
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Subject: [PATCH 3/8] qcow2.py: Subcommand for changing header fields
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RH-Author: Max Reitz <mreitz@redhat.com>
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Message-id: <1388354817-3013-3-git-send-email-mreitz@redhat.com>
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Patchwork-id: 56444
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O-Subject: [RHEL-7.0 qemu-kvm PATCH 2/5] qcow2.py: Subcommand for changing header fields
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Bugzilla: 1004347
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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: Kevin Wolf <kwolf@redhat.com>
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From: Kevin Wolf <kwolf@redhat.com>
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BZ: 1004347
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit c93331c9146719958a4b102435fcd0566da45ea2)
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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---
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tests/qemu-iotests/qcow2.py | 17 +++++++++++++++++
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1 file changed, 17 insertions(+)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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tests/qemu-iotests/qcow2.py | 17 +++++++++++++++++
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1 files changed, 17 insertions(+), 0 deletions(-)
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diff --git a/tests/qemu-iotests/qcow2.py b/tests/qemu-iotests/qcow2.py
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index fecf5b9..44a2b45 100755
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--- a/tests/qemu-iotests/qcow2.py
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+++ b/tests/qemu-iotests/qcow2.py
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@@ -149,6 +149,22 @@ def cmd_dump_header(fd):
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h.dump()
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h.dump_extensions()
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+def cmd_set_header(fd, name, value):
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+ try:
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+ value = int(value, 0)
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+ except:
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+ print "'%s' is not a valid number" % value
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+ sys.exit(1)
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+
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+ fields = (field[2] for field in QcowHeader.fields)
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+ if not name in fields:
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+ print "'%s' is not a known header field" % name
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+ sys.exit(1)
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+
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+ h = QcowHeader(fd)
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+ h.__dict__[name] = value
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+ h.update(fd)
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+
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def cmd_add_header_ext(fd, magic, data):
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try:
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magic = int(magic, 0)
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@@ -205,6 +221,7 @@ def cmd_set_feature_bit(fd, group, bit):
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cmds = [
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[ 'dump-header', cmd_dump_header, 0, 'Dump image header and header extensions' ],
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+ [ 'set-header', cmd_set_header, 2, 'Set a field in the header'],
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[ 'add-header-ext', cmd_add_header_ext, 2, 'Add a header extension' ],
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[ 'del-header-ext', cmd_del_header_ext, 1, 'Delete a header extension' ],
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[ 'set-feature-bit', cmd_set_feature_bit, 2, 'Set a feature bit'],
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--
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1.7.1
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