From c645d5acee0ae022534cb609184277ec2b4a8577 Mon Sep 17 00:00:00 2001 From: Michael Roth Date: Sat, 3 Jun 2017 18:13:32 -0500 Subject: monitor: fix object_del for command-line-created objects Currently objects specified on the command-line are only partially cleaned up when 'object_del' is issued in either HMP or QMP: the object itself is fully finalized, but the QemuOpts are not removed. This results in the following behavior: x86_64-softmmu/qemu-system-x86_64 -monitor stdio \ -object memory-backend-ram,id=ram1,size=256M QEMU 2.7.91 monitor - type 'help' for more information (qemu) object_del ram1 (qemu) object_del ram1 object 'ram1' not found (qemu) object_add memory-backend-ram,id=ram1,size=256M Duplicate ID 'ram1' for object Try "help object_add" for more information which can be an issue for use-cases like memory hotplug. This happens on the HMP side because hmp_object_add() attempts to create a temporary QemuOpts entry with ID 'ram1', which ends up conflicting with the command-line-created entry, since it was never cleaned up during the previous hmp_object_del() call. We address this by adding a check in user_creatable_del(), which is called by both qmp_object_del() and hmp_object_del() to handle the actual object cleanup, to determine whether an option group entry matching the object's ID is present and removing it if it is. Note that qmp_object_add() never attempts to create a temporary QemuOpts entry, so it does not encounter the duplicate ID error, which is why this isn't generally visible in libvirt. Cc: "Dr. David Alan Gilbert" Cc: Markus Armbruster Cc: Eric Blake Cc: Daniel Berrange Cc: qemu-stable@nongnu.org Signed-off-by: Michael Roth Reviewed-by: Daniel P. Berrange Reviewed-by: Markus Armbruster Message-Id: <1496531612-22166-3-git-send-email-mdroth@linux.vnet.ibm.com> Signed-off-by: Markus Armbruster --- tests/check-qom-proplist.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'tests') diff --git a/tests/check-qom-proplist.c b/tests/check-qom-proplist.c index e3b3ae473e..8e432e9ab6 100644 --- a/tests/check-qom-proplist.c +++ b/tests/check-qom-proplist.c @@ -438,9 +438,9 @@ static void test_dummy_createcmdl(void) * check for this in user_creatable_del() and remove the QemuOpts if * it is present. * - * FIXME: add an assert to verify that the QemuOpts is cleaned up - * once the corresponding cleanup code is added. + * The below check ensures this works as expected. */ + g_assert_null(qemu_opts_find(&qemu_object_opts, "dev0")); } static void test_dummy_badenum(void) -- cgit v1.2.3