From nobody Tue Feb 10 23:01:19 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D6838C6FD18 for ; Wed, 29 Mar 2023 11:03:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229615AbjC2LDv (ORCPT ); Wed, 29 Mar 2023 07:03:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60338 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229588AbjC2LDp (ORCPT ); Wed, 29 Mar 2023 07:03:45 -0400 Received: from mail-ed1-x52c.google.com (mail-ed1-x52c.google.com [IPv6:2a00:1450:4864:20::52c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F276340EA for ; Wed, 29 Mar 2023 04:03:43 -0700 (PDT) Received: by mail-ed1-x52c.google.com with SMTP id t10so61387058edd.12 for ; Wed, 29 Mar 2023 04:03:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=daynix-com.20210112.gappssmtp.com; s=20210112; t=1680087822; 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=DslxHK6KBlhiVdu3Lr2KxbgUyV3iiwJejUtCbzhCHrg=; b=Yy5k9qZEJOVBgeYN+QLmeqRbC7KZuQGj8fxV1P1wv2QR/sUQHJaSjxK/EfY8bu2quQ E7/aHYMvw+AlJHkzNq+d6wkXAaiw4NSeudky28BWk3pWDBboxyqwYTCNAyKMhpCecREJ 2WnWEb0e14cv8l4h9uUxiiQIeeWmiWQzGDIKOS5HnLSzsVCLeXP59swtQDl8VkjAg0uA OLMC69ugF//IudDWJBTDrw5QJfDhYWywaz8PjGTJONmnpsEPp9lSFFyqOWgal0tW/Rfh JEFAXEa6dP40HO61CT6wc4MpRKTECR1yZQf/R0RsgezvfrZ6wG4RXjucNsIp0QCpWH4U rktA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680087822; 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=DslxHK6KBlhiVdu3Lr2KxbgUyV3iiwJejUtCbzhCHrg=; b=DfHTPsyrTw7YWiLpkjxugFgAYCP4rQBaJzUZ3HPdFAQfADydnS9zUDroykkr08huBq h4jmlv6t6ynbeF7SHkGax9jU2/EnOtNHJJI27Xo8OyIx41HWw5qxd4W2TlC+poY8YLsS JTmc4AN1/qKAKEy1KVEaLEe0e0XrFrjpy7urYefK4e51+lwUlVhXXbD5ekdB9wYjlGaw jf8nyl2UB+AkemS7Iv2hE8p/r62zz284+yU8jlo5UyG6kY3+C8KmvMyFStkLGtqrI+8d iLx7rponnBPVFK4QKi+kj/5kt+e9yQlxixUE9AZBQxbM6HE/qQU+SEvNEXRXc+q9VyJs OHxg== X-Gm-Message-State: AAQBX9ds9rZ1f0u7YyizfbT77wzgh1ppVs9fMqj1AmifUHagTfb0VKEa 5RcOJHGd7V15bI5PJCzngtE7vg== X-Google-Smtp-Source: AKy350bAeJm/lTdNut+XFjwpE5mB8COw9m59DKjlI8EOn4LXgTEkUyvLPcmriazqkZ4ieGvpm+xugw== X-Received: by 2002:a17:906:612:b0:933:4d47:55b7 with SMTP id s18-20020a170906061200b009334d4755b7mr1840523ejb.2.1680087822487; Wed, 29 Mar 2023 04:03:42 -0700 (PDT) Received: from localhost.localdomain (178-133-100-41.mobile.vf-ua.net. [178.133.100.41]) by smtp.gmail.com with ESMTPSA id md12-20020a170906ae8c00b008e68d2c11d8sm16406975ejb.218.2023.03.29.04.03.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Mar 2023 04:03:42 -0700 (PDT) From: Andrew Melnychenko To: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, mst@redhat.com, jasowang@redhat.com, yoshfuji@linux-ipv6.org, dsahern@kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org Cc: yan@daynix.com, yuri.benditovich@daynix.com Subject: [RFC PATCH 2/5] virtio-net: Added property to load eBPF RSS with fds. Date: Wed, 29 Mar 2023 13:45:43 +0300 Message-Id: <20230329104546.108016-3-andrew@daynix.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230329104546.108016-1-andrew@daynix.com> References: <20230329104546.108016-1-andrew@daynix.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 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 | 77 ++++++++++++++++++++++++++++++++-- include/hw/virtio/virtio-net.h | 1 + 2 files changed, 74 insertions(+), 4 deletions(-) diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index 53e1c32643..45d448a83d 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" @@ -1305,14 +1306,81 @@ static void virtio_net_detach_epbf_rss(VirtIONet *n) virtio_net_attach_ebpf_to_backend(n->nic, -1); } =20 -static bool virtio_net_load_ebpf(VirtIONet *n) +static int virtio_net_get_ebpf_rss_fds(char *str, char *fds[], int nfds) +{ + char *ptr =3D str; + char *cur =3D NULL; + size_t len =3D strlen(str); + int i =3D 0; + + for (; i < nfds && ptr < str + len;) { + cur =3D strchr(ptr, ':'); + + if (cur =3D=3D NULL) { + fds[i] =3D g_strdup(ptr); + } else { + fds[i] =3D g_strndup(ptr, cur - ptr); + } + + i++; + if (cur =3D=3D NULL) { + break; + } else { + ptr =3D cur + 1; + } + } + + return i; +} + +static bool virtio_net_load_ebpf_fds(VirtIONet *n) { - if (!virtio_net_attach_ebpf_to_backend(n->nic, -1)) { - /* backend does't support steering ebpf */ + char *fds_strs[EBPF_RSS_MAX_FDS]; + int fds[EBPF_RSS_MAX_FDS]; + int nfds; + int ret =3D false; + Error *errp; + int i =3D 0; + + if (n =3D=3D NULL || !n->ebpf_rss_fds) { return false; } =20 - return ebpf_rss_load(&n->ebpf_rss); + nfds =3D virtio_net_get_ebpf_rss_fds(n->ebpf_rss_fds, + fds_strs, EBPF_RSS_MAX_FDS); + for (i =3D 0; i < nfds; i++) { + fds[i] =3D monitor_fd_param(monitor_cur(), fds_strs[i], &errp); + } + + if (nfds =3D=3D EBPF_RSS_MAX_FDS) { + ret =3D ebpf_rss_load_fds(&n->ebpf_rss, fds[0], fds[1], fds[2], fd= s[3]); + } + + if (!ret) { + for (i =3D 0; i < nfds; i++) { + close(fds[i]); + } + } + + for (i =3D 0; i < nfds; i++) { + g_free(fds_strs[i]); + } + + return ret; +} + +static bool virtio_net_load_ebpf(VirtIONet *n) +{ + bool ret =3D true; + + if (virtio_net_attach_ebpf_to_backend(n->nic, -1)) { + if (!(n->ebpf_rss_fds + && virtio_net_load_ebpf_fds(n))) { + ret =3D ebpf_rss_load(&n->ebpf_rss); + } + } + + return ret; } =20 static void virtio_net_unload_ebpf(VirtIONet *n) @@ -3900,6 +3968,7 @@ static Property virtio_net_properties[] =3D { 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 ef234ffe7e..e10ce88f91 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; }; =20 size_t virtio_net_handle_ctrl_iov(VirtIODevice *vdev, --=20 2.39.1