From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from www62.your-server.de (www62.your-server.de [213.133.104.62]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CC0A5286422; Mon, 20 Oct 2025 16:24:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=213.133.104.62 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760977459; cv=none; b=YeBrDsR2krVA6YFbWwZu4MPcw6lontHysB7sXDJrdy3Ri2eBzVXTiE8hT763EcChmJt6lZ89VqaDabjNHgRWPL/axvZDt5lR45/6e87wSgMhMsi7tMb1lZGY/mir61yXnnUJWq6twvypyj2aqWuX9Cb8JjcWGN7M3nhgttVwO7w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760977459; c=relaxed/simple; bh=Z4UT22EGyvlEG1tl2tPWz5AKAW8ctXe9I+yn5eN28bU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=JZNzwhx6QTpv1pX2sfi+IhOp92opjpa/Ck5oWcH2miChdB5Wts7BaXgTOatFVe9aT4nTuPRs020rym7qj5yfbQ6zd3Ed5Qav6e9vwHTXqtaedBNUtrbYD08IxY0T9ua6b30rY71QicmbkDAfvLUYeT6VXZCHD6uZ43ZPak1AS/Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=iogearbox.net; spf=pass smtp.mailfrom=iogearbox.net; dkim=pass (2048-bit key) header.d=iogearbox.net header.i=@iogearbox.net header.b=axmQzGe+; arc=none smtp.client-ip=213.133.104.62 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=iogearbox.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iogearbox.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=iogearbox.net header.i=@iogearbox.net header.b="axmQzGe+" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=iogearbox.net; s=default2302; h=Content-Transfer-Encoding:MIME-Version: Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References; bh=zMQLgJjxGNREMvSiUsrqy2mt5zVHgiDcqKcyCwADK3Y=; b=axmQzGe+tJZnIL9mTVbOUmk/1U qyHt7UVn1a3cHQSRedVCD8JOqPdN6S7mllnigoo1acACnGFSJF9BovaYRgpIIrVyvuEst8ddUje3F pHvWyYlWPO0xIqIQDrP/XoSlfWwbA64lDdMtHw6n15U860BLzIO8EQcoezzzqP9FuezSSxzfNRpp8 kl+QMc/1K2K/3oY6g70VeGldQ1O9Mu+L7/fjg6wvzXwfSBvsg2mkQ/aAKhvLuofMMGCyap+dEpt60 oEORRXLZm3o64bZwTLJ/O2GA6RHpiTdP2TGqjPf+Db/bYq7X3uX3K2iVhhtqW7aY+gkSeRsv+N78i iKvnFfSw==; Received: from localhost ([127.0.0.1]) by www62.your-server.de with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.96.2) (envelope-from ) id 1vAsfs-000JiL-1n; Mon, 20 Oct 2025 18:23:56 +0200 From: Daniel Borkmann To: netdev@vger.kernel.org Cc: bpf@vger.kernel.org, kuba@kernel.org, davem@davemloft.net, razor@blackwall.org, pabeni@redhat.com, willemb@google.com, sdf@fomichev.me, john.fastabend@gmail.com, martin.lau@kernel.org, jordan@jrife.io, maciej.fijalkowski@intel.com, magnus.karlsson@intel.com, dw@davidwei.uk, toke@redhat.com, yangzhenze@bytedance.com, wangdongdong.6@bytedance.com Subject: [PATCH net-next v3 00/15] netkit: Support for io_uring zero-copy and AF_XDP Date: Mon, 20 Oct 2025 18:23:40 +0200 Message-ID: <20251020162355.136118-1-daniel@iogearbox.net> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Virus-Scanned: Clear (ClamAV 1.0.9/27798/Mon Oct 20 11:37:28 2025) Containers use virtual netdevs to route traffic from a physical netdev in the host namespace. They do not have access to the physical netdev in the host and thus can't use memory providers or AF_XDP that require reconfiguring/restarting queues in the physical netdev. This patchset adds the concept of queue peering to virtual netdevs that allow containers to use memory providers and AF_XDP at native speed. These mapped queues are bound to a real queue in a physical netdev and act as a proxy. Memory providers and AF_XDP operations takes an ifindex and queue id, so containers would pass in an ifindex for a virtual netdev and a queue id of a mapped queue, which then gets proxied to the underlying real queue. Peered queues are created and bound to a real queue atomically through a generic ynl netdev operation. We have implemented support for this concept in netkit and tested the latter against Nvidia ConnectX-6 (mlx5) as well as Broadcom BCM957504 (bnxt_en) 100G NICs. For more details see the individual patches. v2->v3: - Use netdev_ops_assert_locked instead of netdev_assert_locked (syzbot) - Add missing netdev_lockdep_set_classes in netkit v1->v2: - Removed bind sample ynl code (Stan) - Reworked netdev locking to have consistent order (Stan, Kuba) - Return 'not supported' in API patch (Stan) - Improved ynl documentation (Kuba) - Added 'max: s32-max' in ynl spec for ifindex (Kuba) - Added also queue type in ynl to have user specify rx to make it obvious (Kuba) - Use of netdev_hold (Kuba) - Avoid static inlines from another header (Kuba) - Squashed some commits (Kuba, Stan) - Removed ndo_{peer,unpeer}_queues callback and simplified code (Kuba) - Improved commit messages (Toke, Kuba, Stan, zf) - Got rid of locking genl_sk_priv_get (Stan) - Removed af_xdp cleanup churn (Maciej) - Added netdev locking asserts (Stan) - Reject ethtool ioctl path queue resizing (Kuba) - Added kdoc for ndo_queue_create (Stan) - Uninvert logic in netkit single dev mode (Jordan) - Added binding support for multiple queues Daniel Borkmann (9): net, ethtool: Disallow peered real rxqs to be resized xsk: Move NETDEV_XDP_ACT_ZC into generic header xsk: Move pool registration into single function xsk: Add small helper xp_pool_bindable xsk: Change xsk_rcv_check to check netdev/queue_id from pool xsk: Proxy pool management for mapped queues netkit: Add single device mode for netkit netkit: Document fast vs slowpath members via macros netkit: Add xsk support for af_xdp applications David Wei (6): net: Add bind-queue operation net: Implement netdev_nl_bind_queue_doit net: Add peer info to queue-get response net: Proxy net_mp_{open,close}_rxq for mapped queues netkit: Implement rtnl_link_ops->alloc and ndo_queue_create netkit: Add io_uring zero-copy support for TCP Documentation/netlink/specs/netdev.yaml | 84 ++++++ drivers/net/netkit.c | 330 ++++++++++++++++++++---- include/linux/ethtool.h | 1 + include/net/netdev_queues.h | 5 + include/net/netdev_rx_queue.h | 39 ++- include/net/page_pool/memory_provider.h | 4 +- include/net/xdp_sock_drv.h | 8 +- include/uapi/linux/if_link.h | 6 + include/uapi/linux/netdev.h | 22 ++ net/core/netdev-genl-gen.c | 25 ++ net/core/netdev-genl-gen.h | 1 + net/core/netdev-genl.c | 177 ++++++++++++- net/core/netdev_rx_queue.c | 126 +++++++-- net/ethtool/channels.c | 12 +- net/ethtool/common.c | 10 +- net/ethtool/ioctl.c | 4 +- net/xdp/xsk.c | 44 +++- net/xdp/xsk.h | 5 +- net/xdp/xsk_buff_pool.c | 18 +- tools/include/uapi/linux/netdev.h | 22 ++ 20 files changed, 830 insertions(+), 113 deletions(-) -- 2.43.0