From patchwork Thu Aug 31 06:51:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Melnichenko X-Patchwork-Id: 1828131 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=daynix-com.20230601.gappssmtp.com header.i=@daynix-com.20230601.gappssmtp.com header.a=rsa-sha256 header.s=20230601 header.b=flcBFZ+s; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RbsLf5q2cz1yfX for ; Thu, 31 Aug 2023 16:53:14 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qbbXG-0004QD-IK; Thu, 31 Aug 2023 02:52:10 -0400 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 1qbbXE-0004P0-OB for qemu-devel@nongnu.org; Thu, 31 Aug 2023 02:52:08 -0400 Received: from mail-wm1-x32c.google.com ([2a00:1450:4864:20::32c]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qbbXC-0005Wb-1i for qemu-devel@nongnu.org; Thu, 31 Aug 2023 02:52:08 -0400 Received: by mail-wm1-x32c.google.com with SMTP id 5b1f17b1804b1-401d24f1f27so4508815e9.1 for ; Wed, 30 Aug 2023 23:52:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=daynix-com.20230601.gappssmtp.com; s=20230601; t=1693464724; x=1694069524; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=cmQGkJHuRj/4EIgZUFoPOMy4GWhUIj4lwhX/iEiX7Mg=; b=flcBFZ+sKI5n6oD6cDavff1nveD/1TJHsgJ1opTtU13EH5xwh4JHiw/K1lBWbO1xuX zM81WW5ejWeovTUqKLM+WyabZ/Qb/xWUyGdIz48tZfpuWmv0ZLJsefjJEmmYThLHj6/s fDZh/kPMhYE0gA/OKDiZGozzIj6hNTq9ykc3+8LaRp49Kt/sAWWP4GdsETcBnkbZgk2P J5PuZM4ZBKlqaDCw/OBPcgTEJ7D7XdWaQPqP9ZKXQTjj9NDcIHErNVZkw6tzYobbVXOu 1UHez2WKmTYdY+vAXPn0CRIhhmsHcYs5uIMUijIEmGPqsQTugwzFyLYBV5zNwWA05MAj e4Nw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693464724; x=1694069524; 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=cmQGkJHuRj/4EIgZUFoPOMy4GWhUIj4lwhX/iEiX7Mg=; b=G9MFYAR4M1BTUJGiAUlnOVX20ncCB/kuSqUpAbMhpFGdD0HEEp0vHQ2gfM2SDR+k/Q gByoZDD25MkbFA4KrwmDsZxoKcC187H1lyOUrFHqqk9bDNtx78andsmx1hTTEaLTxD6S u1nymbT3MdCqdclcGVUedNty2jyJAmeafBxQsWvqA35qMBJeKVjxc82+1fqemu9fkn7P JT5HBtmQgbwMyAvi/3TwicU468bORrsS8HYgSS0zFtMsRSV7e4INBc4Y3if4/HI+DX1V AxUJmxLDMjeTxkbkGGq4Ws43TgQsfKBxTuTSwDFEkYTaqTw7b+REdR5A6B+Akgz6A+he 3uqw== X-Gm-Message-State: AOJu0YxOW5BoatSWRzIovi4V3mrIn1n8MwEqyzVD0BBj3YHgqfh4nDTC g1Psi+UAxra4/qRGg6MwrEQh8w== X-Google-Smtp-Source: AGHT+IEuOWXee5EB60wr0c8zOWBfeTcVtpbkaI+v4xyasNW5Np6jEs+N/Vck4ZR9qRr+fsU5RQ9bkQ== X-Received: by 2002:a7b:c858:0:b0:3fe:4900:db95 with SMTP id c24-20020a7bc858000000b003fe4900db95mr3566253wml.37.1693464724767; Wed, 30 Aug 2023 23:52:04 -0700 (PDT) Received: from navi.cosmonova.net.ua ([95.67.24.131]) by smtp.gmail.com with ESMTPSA id hn8-20020a05600ca38800b003fee6e170f9sm969010wmb.45.2023.08.30.23.52.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Aug 2023 23:52:04 -0700 (PDT) From: Andrew Melnychenko To: jasowang@redhat.com, mst@redhat.com, armbru@redhat.com, eblake@redhat.com, qemu-devel@nongnu.org, berrange@redhat.com Cc: yuri.benditovich@daynix.com, yan@daynix.com Subject: [PATCH v7 3/5] virtio-net: Added property to load eBPF RSS with fds. Date: Thu, 31 Aug 2023 09:51:38 +0300 Message-Id: <20230831065140.496485-4-andrew@daynix.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230831065140.496485-1-andrew@daynix.com> References: <20230831065140.496485-1-andrew@daynix.com> MIME-Version: 1.0 Received-SPF: none client-ip=2a00:1450:4864:20::32c; envelope-from=andrew@daynix.com; helo=mail-wm1-x32c.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org eBPF RSS program and maps may now be passed during initialization. Initially was implemented for libvirt to launch qemu without permissions, and initialized eBPF program through the helper. Signed-off-by: Andrew Melnychenko --- hw/net/virtio-net.c | 55 ++++++++++++++++++++++++++++++---- include/hw/virtio/virtio-net.h | 1 + 2 files changed, 50 insertions(+), 6 deletions(-) diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index 7102ec4817..f1894f2095 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -42,6 +42,7 @@ #include "sysemu/sysemu.h" #include "trace.h" #include "monitor/qdev.h" +#include "monitor/monitor.h" #include "hw/pci/pci_device.h" #include "net_rx_pkt.h" #include "hw/virtio/vhost.h" @@ -1304,14 +1305,55 @@ static void virtio_net_detach_epbf_rss(VirtIONet *n) virtio_net_attach_ebpf_to_backend(n->nic, -1); } -static bool virtio_net_load_ebpf(VirtIONet *n) +static bool virtio_net_load_ebpf_fds(VirtIONet *n, Error **errp) { - if (!virtio_net_attach_ebpf_to_backend(n->nic, -1)) { - /* backend does't support steering ebpf */ - return false; + int fds[EBPF_RSS_MAX_FDS] = { [0 ... EBPF_RSS_MAX_FDS - 1] = -1}; + int nfds = 0; + int ret = true; + int i = 0; + g_auto(GStrv) fds_strs = g_strsplit(n->ebpf_rss_fds, ":", 0); + + ERRP_GUARD(); + + if (g_strv_length(fds_strs) != EBPF_RSS_MAX_FDS) { + error_setg(errp, + "Expected %d file descriptors but got %d", + EBPF_RSS_MAX_FDS, g_strv_length(fds_strs)); + return false; + } + + for (i = 0; i < nfds; i++) { + fds[i] = monitor_fd_param(monitor_cur(), fds_strs[i], errp); + if (*errp) { + ret = false; + goto exit; + } + } + + ret = ebpf_rss_load_fds(&n->ebpf_rss, fds[0], fds[1], fds[2], fds[3]); + +exit: + if (!ret || *errp) { + for (i = 0; i < nfds && fds[i] != -1; i++) { + close(fds[i]); + } } - return ebpf_rss_load(&n->ebpf_rss); + return ret; +} + +static bool virtio_net_load_ebpf(VirtIONet *n, Error **errp) +{ + bool ret = false; + + if (virtio_net_attach_ebpf_to_backend(n->nic, -1)) { + if (!(n->ebpf_rss_fds + && virtio_net_load_ebpf_fds(n, errp))) { + ret = ebpf_rss_load(&n->ebpf_rss); + } + } + + return ret; } static void virtio_net_unload_ebpf(VirtIONet *n) @@ -3741,7 +3783,7 @@ static void virtio_net_device_realize(DeviceState *dev, Error **errp) net_rx_pkt_init(&n->rx_pkt); if (virtio_has_feature(n->host_features, VIRTIO_NET_F_RSS)) { - virtio_net_load_ebpf(n); + virtio_net_load_ebpf(n, errp); } } @@ -3903,6 +3945,7 @@ static Property virtio_net_properties[] = { VIRTIO_NET_F_RSS, false), DEFINE_PROP_BIT64("hash", VirtIONet, host_features, VIRTIO_NET_F_HASH_REPORT, false), + DEFINE_PROP_STRING("ebpf_rss_fds", VirtIONet, ebpf_rss_fds), DEFINE_PROP_BIT64("guest_rsc_ext", VirtIONet, host_features, VIRTIO_NET_F_RSC_EXT, false), DEFINE_PROP_UINT32("rsc_interval", VirtIONet, rsc_timeout, diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h index 5f5dcb4572..44faf700b4 100644 --- a/include/hw/virtio/virtio-net.h +++ b/include/hw/virtio/virtio-net.h @@ -219,6 +219,7 @@ struct VirtIONet { VirtioNetRssData rss_data; struct NetRxPkt *rx_pkt; struct EBPFRSSContext ebpf_rss; + char *ebpf_rss_fds; }; size_t virtio_net_handle_ctrl_iov(VirtIODevice *vdev,