From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 91559315D40; Fri, 5 Sep 2025 22:15:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757110548; cv=none; b=AYyJeCccHwhc+WXqqBeNLhT44/a5Bu4Q9TbpOy842QyhS5gZ3mwRBuTti/lriOIDPNQ5Vqyirz/appD+m8pXTEY4QjpBTs7SFCQ0frUZoGPOubRyUD4ExR4v2XsrU+6LY0MCLAjmyRTVlUKmoIMFGUiYMkDnA6f/dHxQdr+TX9U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757110548; c=relaxed/simple; bh=tPVP2AtzstYcdkvHMUKIrAW/kPxEUF3jM06Z7zLivUY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=usOaHCglBIWgsp7kHLuy4XwZcajaRFspZhzTYE2J//+Ov+WLHHC7BVK0/P6dhMFGF8fS/Ch05ZB0oD+hDzKIHDe+wM/kquh8S7nblCJLfk4/ihPx9RMVnchQW92s5L7wd5CSk9Rczmb/bETrGoDTSyBFJH3HIA23G9AtJyo0emo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=G2RAeupD; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="G2RAeupD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 180CFC4CEF1; Fri, 5 Sep 2025 22:15:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1757110548; bh=tPVP2AtzstYcdkvHMUKIrAW/kPxEUF3jM06Z7zLivUY=; h=From:To:Cc:Subject:Date:From; b=G2RAeupDxYw0sEAa4K/qYkm1be9JogSH/vlQULZ7aTBDGTUBfrtVOm0dyW+nIbkGd HkrRH57tKAM794IAaA327DRwp3uiypxjHSkm9kU146jpJ/k7gpZ/WSdF0QCPq7QX2Q iyP4ZRf8dCJpTKUKoByrbSXenPGcndSCcp1O7SIOY0XEKB3EfuliSgKkT65Xw4eOhD Rgowl5ZiRyPnB5brbvY6m3xy2L0Zxm+bmk5UQtWLMpPG7tTlO2XimGXAhjIsr5F0Xu wOks8T+1JzwTJ72IZEXZd/WqhXSjQb28UZDxpuYc7StYGfB31iMY1zNLW7+DAd2rXW xQ0RIc8fm/H9A== From: Jakub Kicinski To: davem@davemloft.net Cc: netdev@vger.kernel.org, edumazet@google.com, pabeni@redhat.com, andrew+netdev@lunn.ch, horms@kernel.org, daniel@iogearbox.net, hawk@kernel.org, john.fastabend@gmail.com, sdf@fomichev.me, michael.chan@broadcom.com, anthony.l.nguyen@intel.com, marcin.s.wojtas@gmail.com, tariqt@nvidia.com, mbloch@nvidia.com, jasowang@redhat.com, bpf@vger.kernel.org, aleksander.lobakin@intel.com, pavan.chebbi@broadcom.com, przemyslaw.kitszel@intel.com, Jakub Kicinski Subject: [PATCH net-next 0/2] net: xdp: handle frags with unreadable memory Date: Fri, 5 Sep 2025 15:15:37 -0700 Message-ID: <20250905221539.2930285-1-kuba@kernel.org> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Make XDP helpers compatible with unreadable memory. This is very similar to how we handle pfmemalloc frags today. Record the info in xdp_buf flags as frags get added and then update the skb once allocated. This series adds the unreadable memory metadata tracking to drivers using xdp_build_skb_from*() with no changes on the driver side - hence the only driver changes here are refactoring. Obviously, unreadable memory is incompatible with XDP today, but thanks to xdp_build_skb_from_buf() increasing number of drivers have a unified datapath, whether XDP is enabled or not. RFC: https://lore.kernel.org/20250812161528.835855-1-kuba@kernel.org Jakub Kicinski (2): net: xdp: pass full flags to xdp_update_skb_shared_info() net: xdp: handle frags with unreadable memory include/net/xdp.h | 38 ++++++++++++------- drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c | 7 ++-- drivers/net/ethernet/intel/i40e/i40e_txrx.c | 15 ++++---- drivers/net/ethernet/intel/ice/ice_txrx.c | 15 ++++---- drivers/net/ethernet/marvell/mvneta.c | 7 ++-- .../net/ethernet/mellanox/mlx5/core/en_rx.c | 23 ++++++----- drivers/net/virtio_net.c | 7 ++-- net/core/xdp.c | 21 +++++----- 8 files changed, 69 insertions(+), 64 deletions(-) -- 2.51.0