From nobody Tue Nov 26 14:42:28 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1706806116735520.2380679471827; Thu, 1 Feb 2024 08:48:36 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rVaB1-0002ta-IN; Thu, 01 Feb 2024 11:44:35 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rVaAr-0002r6-OX for qemu-devel@nongnu.org; Thu, 01 Feb 2024 11:44:25 -0500 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rVaAm-0002T1-AB for qemu-devel@nongnu.org; Thu, 01 Feb 2024 11:44:25 -0500 Received: from [2001:8b0:10b:1::ebe] (helo=i7.infradead.org) by desiato.infradead.org with esmtpsa (Exim 4.97.1 #2 (Red Hat Linux)) id 1rVaAg-00000009cLx-0lVS for qemu-devel@nongnu.org; Thu, 01 Feb 2024 16:44:14 +0000 Received: from dwoodhou by i7.infradead.org with local (Exim 4.97.1 #2 (Red Hat Linux)) id 1rVaAf-00000003ILq-093v for qemu-devel@nongnu.org; Thu, 01 Feb 2024 16:44:13 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:To:From:Reply-To: Cc:Content-Type:Content-ID:Content-Description; bh=l9x9HGNJH5fBiIeKzePXsIuGh5SQlI6/4CQcfviByuY=; b=NvcRHT+ld+VhyS11El94WCGBx5 nbwVR47WJ+pc2NZLPlvSXq/l4ksOMpjabHce4ztOAlq30lsjPiKRd/gIRS7GExLQ6VZF5/bCufo5r tmXk+G2cg5h8taCaPuKAiQb9JED68/8zEDmHD6y4cHo6wYeO2SSj0v4vw8l9n1U6MtGPlJPscKaDR 6iSCINgfiACRVpP+8qDbRRMwn1M5nEvx3v2FL8Tx8V6+bDIXjQY07lz/QfpU90R2CiqmmP/vwIEVA 9SyJf+DuslB5xkRgVcecr+5McJZKF6tkm2afDjWZFZcVKJV4UiMbLiFCBhaKvuXp6ipaXpl/OPpOz Q+n3A01g==; From: David Woodhouse To: qemu-devel@nongnu.org Subject: [PULL 01/47] net: add qemu_{configure, create}_nic_device(), qemu_find_nic_info() Date: Thu, 1 Feb 2024 16:43:26 +0000 Message-ID: <20240201164412.785520-2-dwmw2@infradead.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240201164412.785520-1-dwmw2@infradead.org> References: <20240201164412.785520-1-dwmw2@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-SRS-Rewrite: SMTP reverse-path rewritten from by desiato.infradead.org. See http://www.infradead.org/rpr.html 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: none client-ip=2001:8b0:10b:1:d65d:64ff:fe57:4e05; envelope-from=BATV+1220c4869a9b484313cc+7466+infradead.org+dwmw2@desiato.srs.infradead.org; helo=desiato.infradead.org X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: fail (Header signature does not verify) X-ZM-MESSAGEID: 1706806117130100004 Content-Type: text/plain; charset="utf-8" From: David Woodhouse Most code which directly accesses nd_table[] and nb_nics uses them for one of two things. Either "I have created a NIC device and I'd like a configuration for it", or "I will create a NIC device *if* there is a configuration for it". With some variants on the theme around whether they actually *check* if the model specified in the configuration is the right one. Provide functions which perform both of those, allowing platforms to be a little more consistent and as a step towards making nd_table[] and nb_nics private to the net code. One might argue that platforms ought to be consistent about whether they create the unconfigured devices or not, but making significant user-visible changes is explicitly *not* the intent right now. The new functions leave the 'model' field of the NICInfo as NULL after using it for the default NIC model, unlike the qemu_check_nic_model() function which does set nd->model to match default_model explicitly. This is acceptable because there is no code which consumes nd->model except this NIC-matching code in net/net.c, and no reasonable excuse for any code wanting to use nd->model in future. Also export the qemu_find_nic_info() helper, as some platforms have special cases they need to handle. Signed-off-by: David Woodhouse Reviewed-by: Paul Durrant Reviewed-by: Thomas Huth --- include/net/net.h | 40 +++++++++++++++++++++++++++++++++++++ net/net.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 91 insertions(+) diff --git a/include/net/net.h b/include/net/net.h index ffbd2c8d56..dff1872b4d 100644 --- a/include/net/net.h +++ b/include/net/net.h @@ -207,7 +207,47 @@ int qemu_show_nic_models(const char *arg, const char *= const *models); void qemu_check_nic_model(NICInfo *nd, const char *model); int qemu_find_nic_model(NICInfo *nd, const char * const *models, const char *default_model); +/** + * qemu_find_nic_info: Obtain NIC configuration information + * @typename: Name of device object type + * @match_default: Match NIC configurations with no model specified + * @alias: Additional model string to match (for user convenience and + * backward compatibility). + * + * Search for a NIC configuration matching the NIC model constraints. + */ +NICInfo *qemu_find_nic_info(const char *typename, bool match_default, + const char *alias); +/** + * qemu_configure_nic_device: Apply NIC configuration to a given device + * @dev: Network device to be configured + * @match_default: Match NIC configurations with no model specified + * @alias: Additional model string to match + * + * Search for a NIC configuration for the provided device, using the + * additionally specified matching constraints. If found, apply the + * configuration using qdev_set_nic_properties() and return %true. + * + * This is used by platform code which creates the device anyway, + * regardless of whether there is a configuration for it. This tends + * to be platforms which ignore `--nodefaults` and create net devices + * anyway, for example because the Ethernet device on that board is + * always physically present. + */ +bool qemu_configure_nic_device(DeviceState *dev, bool match_default, + const char *alias); =20 +/** + * qemu_create_nic_device: Create a NIC device if a configuration exists f= or it + * @typename: Object typename of network device + * @match_default: Match NIC configurations with no model specified + * @alias: Additional model string to match + * + * Search for a NIC configuration for the provided device type. If found, + * create an object of the corresponding type and return it. + */ +DeviceState *qemu_create_nic_device(const char *typename, bool match_defau= lt, + const char *alias); void print_net_client(Monitor *mon, NetClientState *nc); void net_socket_rs_init(SocketReadState *rs, SocketReadStateFinalize *finalize, diff --git a/net/net.c b/net/net.c index 0520bc1681..aeb7f573fc 100644 --- a/net/net.c +++ b/net/net.c @@ -1087,6 +1087,57 @@ static int net_init_nic(const Netdev *netdev, const = char *name, return idx; } =20 +NICInfo *qemu_find_nic_info(const char *typename, bool match_default, + const char *alias) +{ + NICInfo *nd; + int i; + + for (i =3D 0; i < nb_nics; i++) { + nd =3D &nd_table[i]; + + if (!nd->used || nd->instantiated) { + continue; + } + + if ((match_default && !nd->model) || !g_strcmp0(nd->model, typenam= e) + || (alias && !g_strcmp0(nd->model, alias))) { + return nd; + } + } + return NULL; +} + + +/* "I have created a device. Please configure it if you can" */ +bool qemu_configure_nic_device(DeviceState *dev, bool match_default, + const char *alias) +{ + NICInfo *nd =3D qemu_find_nic_info(object_get_typename(OBJECT(dev)), + match_default, alias); + + if (nd) { + qdev_set_nic_properties(dev, nd); + return true; + } + return false; +} + +/* "Please create a device, if you have a configuration for it" */ +DeviceState *qemu_create_nic_device(const char *typename, bool match_defau= lt, + const char *alias) +{ + NICInfo *nd =3D qemu_find_nic_info(typename, match_default, alias); + DeviceState *dev; + + if (!nd) { + return NULL; + } + + dev =3D qdev_new(typename); + qdev_set_nic_properties(dev, nd); + return dev; +} =20 static int (* const net_client_init_fun[NET_CLIENT_DRIVER__MAX])( const Netdev *netdev, --=20 2.43.0