riscv/qemu: QEMU main repository: Please see https://www.qemu.org/docs/master/devel/submitting-a-patch.html for how to submit changes to QEMU. Pull Requests are ignored. Please only use release tarballs from the QEMU website. http://www.qemu.org - qemu

QEMU main repository: Please see https://www.qemu.org/docs/master/devel/submitting-a-patch.html for how to submit changes to QEMU. Pull Requests are ignored. Please only use release tarballs from the QEMU website. http://www.qemu.org

emulation kvm qemu virtualization

History

Eric Auger db57fef1e2 qom: Introduce object_property_try_add_child() object_property_add() does not allow object_property_try_add() to gracefully fail as &error_abort is passed as an error handle. However such failure can easily be triggered from the QMP shell when, for instance, one attempts to create an object with an id that already exists. This is achieved from the following call path: qmp_object_add -> user_creatable_add_dict -> user_creatable_add_type -> object_property_add_child -> object_property_add For instance, from the qmp-shell, call twice: object-add qom-type=memory-backend-ram id=mem1 props.size=1073741824 and QEMU aborts. This behavior is undesired as a user/management application mistake in reusing a property ID shouldn't result in loss of the VM and live data within. This patch introduces a new function, object_property_try_add_child() which takes an error handle and turn object_property_try_add() into a non-static one. Now the call path becomes: user_creatable_add_type -> object_property_try_add_child -> object_property_try_add and the error is returned gracefully to the QMP client. (QEMU) object-add qom-type=memory-backend-ram id=mem2 props.size=4294967296 {"return": {}} (QEMU) object-add qom-type=memory-backend-ram id=mem2 props.size=4294967296 {"error": {"class": "GenericError", "desc": "attempt to add duplicate property 'mem2' to object (type 'container')"}} Signed-off-by: Eric Auger <eric.auger@redhat.com> Fixes: `d2623129a7` ("qom: Drop parameter @errp of object_property_add() & friends") Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Greg Kurz <groug@kaod.org> Tested-by: Greg Kurz <groug@kaod.org> Message-Id: <20200629193424.30280-2-eric.auger@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		6 years ago
..
Makefile.objs	qemu-storage-daemon: Add --object option	6 years ago
container.c	qom/container: remove .instance_size initializer from container_info	6 years ago
object.c	qom: Introduce object_property_try_add_child()	6 years ago
object_interfaces.c	qom: Introduce object_property_try_add_child()	6 years ago
qom-hmp-cmds.c	qom: Put name parameter before value / visitor parameter	6 years ago
qom-qmp-cmds.c	qom: Put name parameter before value / visitor parameter	6 years ago
qom-qobject.c	error: Eliminate error_propagate() manually	6 years ago
trace-events	trace-events: Shorten file names in comments	7 years ago