From patchwork Wed Oct 2 09:02:19 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Antonio Quartulli X-Patchwork-Id: 13819487 Received: from mail-wm1-f53.google.com (mail-wm1-f53.google.com [209.85.128.53]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2A2441991C2 for ; Wed, 2 Oct 2024 09:03:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.53 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727859808; cv=none; b=W6ZzHU52CdRhUgYkDbZ8NbPUqPdEyJLML8zCutfgvEN2PgLOzh44eoqykaGQ/kcqtMuZ7eDhpOOpXDar5lyvgnrG4Ytg3tG/919lku/7rxX+7JHO+0ouGmJe8/2KIrlP/cvq16t5LMKETJuR2U3k2FajFcwJ7vlI4EDMTbQrTW0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727859808; c=relaxed/simple; bh=DM3y7oFYQLCwHm8IBgcaXTmAGiOJkdor1LAmtsasBrQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Enmv3kqxBHf5mNiBGCn/I+eD88lV9D0fSmKWYLGSVxmDPtPW0Xgng53rH0K7ikk+WmjRv/yfFdeFey1/dDj2MQERy2CvTX+yuUUbjSzHD994+sSXrLYhqjBDyYzbNSQnHUx0T24jO3kgtooB50wQ6cfdNJ2Fw4bbKr3W0/2qV38= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=openvpn.net; spf=pass smtp.mailfrom=openvpn.com; dkim=pass (2048-bit key) header.d=openvpn.net header.i=@openvpn.net header.b=JQ01PDxi; arc=none smtp.client-ip=209.85.128.53 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=openvpn.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=openvpn.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=openvpn.net header.i=@openvpn.net header.b="JQ01PDxi" Received: by mail-wm1-f53.google.com with SMTP id 5b1f17b1804b1-42cbb08a1a5so60061425e9.3 for ; Wed, 02 Oct 2024 02:03:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=openvpn.net; s=google; t=1727859803; x=1728464603; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=6Hmat1snwy24bYlvJyESXk2i6jOGwhPoWPcr27v2+v8=; b=JQ01PDxibAV3680Czi8kml57r8DPeIHaq+Sclt7l/Mm8SNeywFffLPYwxRunuLRxtR LgoYCWgOvVrZ36by179yvOY5bIARq1pz2EH9fmRNlcsZWPnGfGmMZ+Q7DQv/rOE/yfK3 8BK/xQRPyr5WI6yP2W+Lws8CAzLvHxXukNreubkGvFaUNQMFZObfoO5AcQ78qk8rvvVz hrDbUZED5yyptQn8JsQDq8a3r8PwADR1Kcw8PMxK+3Zp0Cy6Ha+5rpwL7YqErbmAiIBx 5DXp0RfP1VAItFZbqrQKYlncTxFGe127nPv3AbG3rA6+vjs9zZWjm5TeAiD0p5+PsJ8F /HJA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727859803; x=1728464603; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=6Hmat1snwy24bYlvJyESXk2i6jOGwhPoWPcr27v2+v8=; b=KGw3BJFOkCGOaAlCvpMaoupdQHjEdME6LNmxydfV4FqyA5pmZj3D/TT0uym6gIPNKJ du04X6ZnkXKDHVtkh8V4OH5OSw951pFBYsgPSJ1jA4XLTilk7Z/+kQAIrJNYJOE4Rznb fS9FW89i9lLcwBbPwAqM129q9bbsmcu72fCeEhqOjHg1CFtMnMQIERqIcykPIEnsyMUH 1AxuQbbBT1abVzmLZwrsD5wzwSdcGfCShmCEuAVtpsSWJQ2m3Bim62T5dzyopoiWr2Dd P01Dj78fwGTmP8MYF1xSpLdvxwPHsKljqGcAEJNRmOhZ9h9NHe3007t3y1wuLQmH/QJh XYGQ== X-Forwarded-Encrypted: i=1; AJvYcCWlWY7rCCFKNXSa1lrbub+18HUtvz2cRAitJW1vKZW2+ygjvimyqYvSJ3VnV3s/0tYHSIc7xCIvIS2yyp0WpEA=@vger.kernel.org X-Gm-Message-State: AOJu0Yz6INJFe43bOn8+GocHd0W5XizQprQO+zwLaJKIZNx7r3IroIsu zlh37OFUENevP5sGJ/MCb+JJF/egjoW23TQ+a5fu4MZYCu8b/6HGQaIwhpfe1rg= X-Google-Smtp-Source: AGHT+IHGfgHXeajIqz5xpJZ16PbVXjaXdCIAwKIKuj2KQdvb9xIO/VhWAQi5VndxSje2DouimnQQIQ== X-Received: by 2002:a5d:5e05:0:b0:37d:129:e30 with SMTP id ffacd0b85a97d-37d01291038mr487858f8f.2.1727859803560; Wed, 02 Oct 2024 02:03:23 -0700 (PDT) Received: from serenity.mandelbit.com ([2001:67c:2fbc:1:da6e:ecd8:2234:c32e]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-37cd56e8822sm13602320f8f.50.2024.10.02.02.03.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Oct 2024 02:03:23 -0700 (PDT) From: Antonio Quartulli Date: Wed, 02 Oct 2024 11:02:19 +0200 Subject: [PATCH net-next v8 05/24] ovpn: implement interface creation/destruction via netlink Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241002-b4-ovpn-v8-5-37ceffcffbde@openvpn.net> References: <20241002-b4-ovpn-v8-0-37ceffcffbde@openvpn.net> In-Reply-To: <20241002-b4-ovpn-v8-0-37ceffcffbde@openvpn.net> To: Eric Dumazet , Jakub Kicinski , Paolo Abeni , Donald Hunter , Antonio Quartulli , Shuah Khan Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, sd@queasysnail.net, ryazanov.s.a@gmail.com X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2973; i=antonio@openvpn.net; h=from:subject:message-id; bh=DM3y7oFYQLCwHm8IBgcaXTmAGiOJkdor1LAmtsasBrQ=; b=owEBbQGS/pANAwAIAQtw5TqgONWHAcsmYgBm/QxRH1VMATSW6B1xqnv/eu9vR9wYEz8Jjrm5R qpaluPO51KJATMEAAEIAB0WIQSZq9xs+NQS5N5fwPwLcOU6oDjVhwUCZv0MUQAKCRALcOU6oDjV h3j3B/0Y6d4sgBenZlLL6ACX9dYwWDNqmoDhw2CTWfpwixqbKb3ytFigN0VahpYrzVHO05Iki3V AqZGg/Jrjt6RlBPNheiP7gZN3WL/2RqhoxjwON6ksiUecEfCt8GiMhia9B2Tv/F6aqhZq/o7PlD YGOVZuuMkwaV3aA/TEv0jNd620jCszrYx9RfiFsFkYplvFMlnljq0G+/IaFYLt4PHmBltIFOvbI 0vrtHoy30/DwcxCqWh6qmn5C/QFPwh2i9Msg1Did1xSFqhRx2/qFtmam9gFqL2n1a5sjR/0bZPs mQVIwP5ag4DexKaIrzqsGuty8bJdhx4Rr6mV0cav2WCO39CE X-Developer-Key: i=antonio@openvpn.net; a=openpgp; fpr=CABDA1282017C267219885C748F0CCB68F59D14C Allow userspace to create and destroy an interface using netlink commands. Signed-off-by: Antonio Quartulli --- drivers/net/ovpn/main.h | 2 ++ drivers/net/ovpn/netlink.c | 59 ++++++++++++++++++++++++++++++++++++++++++++-- 2 files changed, 59 insertions(+), 2 deletions(-) diff --git a/drivers/net/ovpn/main.h b/drivers/net/ovpn/main.h index 4dfcba9deb590bbf119f51a40dff1517fe227b22..c664d9c655734263fcf58dd8f2fa5446565a29cf 100644 --- a/drivers/net/ovpn/main.h +++ b/drivers/net/ovpn/main.h @@ -10,6 +10,8 @@ #ifndef _NET_OVPN_MAIN_H_ #define _NET_OVPN_MAIN_H_ +#define OVPN_DEFAULT_IFNAME "ovpn%d" + struct net_device *ovpn_iface_create(const char *name, enum ovpn_mode mode, struct net *net); void ovpn_iface_destruct(struct ovpn_struct *ovpn); diff --git a/drivers/net/ovpn/netlink.c b/drivers/net/ovpn/netlink.c index 7b6b4d03b845eeb8654e37ac3495e8172ac3f291..6e60591d605dde19c6bbd47ef0e90e522776688c 100644 --- a/drivers/net/ovpn/netlink.c +++ b/drivers/net/ovpn/netlink.c @@ -7,6 +7,7 @@ */ #include +#include #include #include @@ -84,12 +85,66 @@ void ovpn_nl_post_doit(const struct genl_split_ops *ops, struct sk_buff *skb, int ovpn_nl_dev_new_doit(struct sk_buff *skb, struct genl_info *info) { - return -EOPNOTSUPP; + const char *ifname = OVPN_DEFAULT_IFNAME; + enum ovpn_mode mode = OVPN_MODE_P2P; + struct net_device *dev; + struct sk_buff *msg; + void *hdr; + + if (info->attrs[OVPN_A_IFNAME]) + ifname = nla_data(info->attrs[OVPN_A_IFNAME]); + + if (info->attrs[OVPN_A_MODE]) { + mode = nla_get_u32(info->attrs[OVPN_A_MODE]); + pr_debug("ovpn: setting device (%s) mode: %u\n", ifname, mode); + } + + dev = ovpn_iface_create(ifname, mode, genl_info_net(info)); + if (IS_ERR(dev)) { + NL_SET_ERR_MSG_FMT_MOD(info->extack, + "error while creating interface: %ld", + PTR_ERR(dev)); + return PTR_ERR(dev); + } + + msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + hdr = genlmsg_iput(msg, info); + if (!hdr) { + nlmsg_free(msg); + return -ENOBUFS; + } + + if (nla_put_string(msg, OVPN_A_IFNAME, dev->name)) { + genlmsg_cancel(msg, hdr); + nlmsg_free(msg); + return -EMSGSIZE; + } + + if (nla_put_u32(msg, OVPN_A_IFINDEX, dev->ifindex)) { + genlmsg_cancel(msg, hdr); + nlmsg_free(msg); + return -EMSGSIZE; + } + + genlmsg_end(msg, hdr); + + return genlmsg_reply(msg, info); } int ovpn_nl_dev_del_doit(struct sk_buff *skb, struct genl_info *info) { - return -EOPNOTSUPP; + struct ovpn_struct *ovpn = info->user_ptr[0]; + + rtnl_lock(); + ovpn_iface_destruct(ovpn); + unregister_netdevice(ovpn->dev); + netdev_put(ovpn->dev, NULL); + rtnl_unlock(); + + return 0; } int ovpn_nl_peer_new_doit(struct sk_buff *skb, struct genl_info *info)