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[99.254.114.190]) by smtp.gmail.com with ESMTPSA id 8926c6da1cb9f-4e06d6e7fd9sm2298599173.9.2024.11.18.14.13.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 Nov 2024 14:13:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1731968024; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=WNbWhUzuTl7PVjee2Nf29buGdAIQPwxZR1jPGOGdLDU=; b=c1yeJIfYPzmMFzrDtBpYOMdqwywUCZLqpX/7fP9gRdba+XBo9KKFrIeVh3bi5Z9LnRqvr/ HMjUend5E3rQM+rt7QT5hL7Oc5G3IPei8L7S41nQ39dUjb+NMzNjU1oNtOXrF5RP+WuJZA 5N/aOuTPSgYbofJUi5cbVTnbYJyx/0o= X-MC-Unique: YYEQtFBdMd-oFdsQ-aYvFQ-1 X-Mimecast-MFC-AGG-ID: YYEQtFBdMd-oFdsQ-aYvFQ X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1731968021; x=1732572821; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=WNbWhUzuTl7PVjee2Nf29buGdAIQPwxZR1jPGOGdLDU=; b=aZGTLc33KyUPRJaKAjEwYs+aA8cPA9bQdsjP1FoLx9+00RO6RsgCWrhdszJylTh6x4 kPLAaXu7s+7ozk2Njvj3PIK9R50uUstZu/NhAUHijNpaOd/r6zNcGgpZz94mRGi19OFF R+c6gzjhb9IOGdNaeLvDyONacERLZycjrBvJbCcjvlIwY0n+PdU7zGV3rtcq+5T1h18d YxEpY70a+WhCygVY8IPPXSeNkWfGnPZnYdi72/4ogJ7e1zTeoayo4p0ALPGMoK+VYQxC 8GtAw6QSbchUTiorA5fs1yh345x1QidHNDHAInRIlH+2c0CDbjeUcoTFcAdhDGZZsZI4 bO+w== X-Gm-Message-State: AOJu0YwIVK8EizvkVuUaS1LmGzJ9O9Dj93FvcEspHYLkPOji1/M26t9j gE1HBaLn+//oiNOTrfNsaYBT7y10NsU+Sy6cxBFIxc+7QbpnyyCoAtrKfYKo4cN6Urh0IsFjwHU +0u9g2hb8bsaIc/b+viokSgdo4e56lbeqGs2r5cGu6KELftNNT+p+hCEts0xNQ0ue55q62GIle8 es0P3bI1tIYYn22Q7Iij6HTDRJt3gidfGOzQ== X-Received: by 2002:a05:6602:14c8:b0:83a:c0ba:73c6 with SMTP id ca18e2360f4ac-83e6c31965emr1209375839f.11.1731968020989; Mon, 18 Nov 2024 14:13:40 -0800 (PST) X-Google-Smtp-Source: AGHT+IFbSSn8YeTtMCMHNaenElUCfGGpCPnzRTQLmiVZU99knch+t0teprRxawYHabtflej607Wx7g== X-Received: by 2002:a05:6602:14c8:b0:83a:c0ba:73c6 with SMTP id ca18e2360f4ac-83e6c31965emr1209372339f.11.1731968020639; Mon, 18 Nov 2024 14:13:40 -0800 (PST) From: Peter Xu To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Fabiano Rosas , Juraj Marcin , peterx@redhat.com, Markus Armbruster , Eduardo Habkost , Peter Maydell , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Paolo Bonzini Subject: [PATCH 4/5] qdev: Make qdev_get_machine() not use container_get() Date: Mon, 18 Nov 2024 17:13:29 -0500 Message-ID: <20241118221330.3480246-5-peterx@redhat.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20241118221330.3480246-1-peterx@redhat.com> References: <20241118221330.3480246-1-peterx@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=peterx@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.142, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1731968114398116600 Content-Type: text/plain; charset="utf-8" Currently, qdev_get_machine() has a slightly misuse of container_get(), as the helper says "get a container" but in reality the goal is to get the machine object. Note that it _may_ get a container (at "/machine") in our current unit test of test-qdev-global-props.c, but it's probably unexpected and worked by accident.. Switch to an explicit object_resolve_path_component(), with a side benefit that qdev_get_machine() can happen a lot, and we don't need to split the string ("/machine") every time. This also paves way for making the helper container_get() never try to return a non-container at all. Signed-off-by: Peter Xu --- hw/core/qdev.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/hw/core/qdev.c b/hw/core/qdev.c index eff297e584..e828088c58 100644 --- a/hw/core/qdev.c +++ b/hw/core/qdev.c @@ -825,7 +825,13 @@ Object *qdev_get_machine(void) static Object *dev; =20 if (dev =3D=3D NULL) { - dev =3D container_get(object_get_root(), "/machine"); + /* + * NOTE: when the machine is not yet created, this helper will + * also keep the cached object untouched and return NULL. The next + * invoke of the helper will try to look for the machine again. + * It'll only cache the pointer when it's found the first time. + */ + dev =3D object_resolve_path_component(object_get_root(), "machine"= ); } =20 return dev; --=20 2.45.0