From patchwork Fri May 30 04:50:14 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Akihiko Odaki X-Patchwork-Id: 893447 Received: from mail-pf1-f169.google.com (mail-pf1-f169.google.com [209.85.210.169]) (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 1BBDA22422D for ; Fri, 30 May 2025 04:51:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.169 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748580671; cv=none; b=XX8MzKw3sleKypcGK7A20FQ5ZZHILykMvypDz2U9olfJjYZH7qid3rTfCPCRhanLacFunn2A19+LCZF6PxEGFk/zmERYnZldUB6/b1p7eqAtCfgiRah+CbJdLiMti7Oz+0vD0kkrm3NkOEgDd+ukm11veDlZnyCmANfSFYfl70w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748580671; c=relaxed/simple; bh=lWGVKyybSScfvzAgnxZfdPakMV9WV+eXSxEJF4cb1lY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To; b=Ibs397dOjAxr1N7Hxdjby3KdNFboIFNiT+n4NYJdZcjmRCARWglzOBESepD+urtyGXgCz2wwlYv+GgbQnDN7yj1SzlPQfl8et1QSts2wvHq+U2YrF9UM9o7TdJyYOwB8mxBWg6NP6TVWe66EGEhRTtjFqbA2nz6XbvAAsLeaQOU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=daynix.com; spf=pass smtp.mailfrom=daynix.com; dkim=pass (2048-bit key) header.d=daynix-com.20230601.gappssmtp.com header.i=@daynix-com.20230601.gappssmtp.com header.b=AWkz7vON; arc=none smtp.client-ip=209.85.210.169 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=daynix.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=daynix.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=daynix-com.20230601.gappssmtp.com header.i=@daynix-com.20230601.gappssmtp.com header.b="AWkz7vON" Received: by mail-pf1-f169.google.com with SMTP id d2e1a72fcca58-74264d1832eso1687539b3a.0 for ; Thu, 29 May 2025 21:51:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=daynix-com.20230601.gappssmtp.com; s=20230601; t=1748580669; x=1749185469; darn=vger.kernel.org; h=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=Z15gseFrGsCaLlozqKPcH2zd7I0guJGS0A9lc7pAtL0=; b=AWkz7vONAUKHEJ1BTAsIGd6+oLDDkSLczPChdvQu5ORyUjUBYLo06jokq4YNudLMd0 cZFWXtDlVdc5pzmsSve234WgkjNFvOezh9bjRcCR+paKjqvLBv2m+BgkJ30lu3+0vbJD 2AMhCM4e8rCFp6xoWniyyggyVCvKBOoO8EOXONeAVfHyP6iJq2aYs4i7gDstIaEK52Cp pHfacsIBbZtr2Gqp11V8OXkI40tcMRcs7SF6QMBCJ344XKw6pxNUDD3r/jTNCpV4CKxo 9lVs9n/6bFHCm81RS8tI+KQzLTk31WH98vmjTi8kDnoCWzPzPGevHa/P8qio4ArxfuuR sVmw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1748580669; x=1749185469; h=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=Z15gseFrGsCaLlozqKPcH2zd7I0guJGS0A9lc7pAtL0=; b=YfCPIcWXf8ZBqhaSKFArbDYd++IxKJbPEyFbf8yalD9+u7+cp5bI/D+2Jt9eWxx5TH 0gN85EOpG58d47kNGWic1xv8/XhY4Bs/GuJv6uHZB+lmPb5r2xJXZhP4/jSBDYANV0aY zQkJjMcuQVvi5pC/WlDsKhiT3pNxPJcX95YvJ+i5Xcs3WVc5lD4kzV/1IIjwlLAas0ZZ +UCU0htFdITqwaWghyQoSGB+vPYqCex6nKUTnLWK/kAi9B2u0n/0Vn6uPuW4gV15P1kk OgCmVuqRlx2DBYaTGTkmIMNspjIKkrBDbOChjInKJQcsNDG6VHBu44BC2hykGZyDXH+r BybA== X-Forwarded-Encrypted: i=1; AJvYcCW1bq+BwElV9XCCRQJhJqOFqWkiPYuIRQk+gnvx+WhmALv+gzCHJ7o9DCBT+FzSh1PRDqO3DD8NSmbLV/16/mk=@vger.kernel.org X-Gm-Message-State: AOJu0YyKNMlvCbQYkCVxL+nBF+dnPGtmUlfHDfLFS/6CpAlLbV8IPzZN n0KuhxFCyAH7BNtH+pDkr9OJ7EsQXqB3bNVtOTZqgtCbcuuQrgfzhieRP12mE/+dgg0= X-Gm-Gg: ASbGncvwDnBPsG9bdnsQnof4ajEG6JdluE1+IsO73rgp/DzrtSQAh9nlijtNbFOWI/C +A+LjKwOMOP4AoxOq+HsFS1mOamfeJRaICVenkKxDUO47zHm3RKv5IAcYiNV8GPfh8O2aJ+K4sp 5MDHy2SNIawb2BXm+E021wxQxELPaH+xploQY6GN1ijD006+kXTXtliaWzMIyj7WKgenqDP1uB0 Zkze2pEkG0j6CqAdo6QDVoqHK+H7XPu5/ntzP/YFypk0g+eKoACzRJYBUpyLZRrlc+4hIBBhdwD owK6OKP4Y9Hns/hT0pi0d/yWbYHwgBu6t6w9H/lJ2GANkd/pS8yA X-Google-Smtp-Source: AGHT+IFEAyvdh+gmFNHHDHekWEQMYLOTZZa1DYZNnrPSAK+MYRW4HLZI96PlWLiwNkqJ19TNscPw2g== X-Received: by 2002:a05:6a00:805:b0:736:5b85:a911 with SMTP id d2e1a72fcca58-747bd9658a0mr3200511b3a.8.1748580669233; Thu, 29 May 2025 21:51:09 -0700 (PDT) Received: from localhost ([157.82.128.1]) by smtp.gmail.com with UTF8SMTPSA id d2e1a72fcca58-747affafa42sm2231166b3a.92.2025.05.29.21.51.06 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 29 May 2025 21:51:08 -0700 (PDT) From: Akihiko Odaki Date: Fri, 30 May 2025 13:50:14 +0900 Subject: [PATCH net-next v12 10/10] vhost/net: Support VIRTIO_NET_F_HASH_REPORT Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250530-rss-v12-10-95d8b348de91@daynix.com> References: <20250530-rss-v12-0-95d8b348de91@daynix.com> In-Reply-To: <20250530-rss-v12-0-95d8b348de91@daynix.com> To: Jonathan Corbet , Willem de Bruijn , Jason Wang , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "Michael S. Tsirkin" , Xuan Zhuo , Shuah Khan , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-kselftest@vger.kernel.org, Yuri Benditovich , Andrew Melnychenko , Stephen Hemminger , gur.stavi@huawei.com, Lei Yang , Simon Horman , Akihiko Odaki X-Mailer: b4 0.15-dev-edae6 VIRTIO_NET_F_HASH_REPORT allows to report hash values calculated on the host. When VHOST_NET_F_VIRTIO_NET_HDR is employed, it will report no hash values (i.e., the hash_report member is always set to VIRTIO_NET_HASH_REPORT_NONE). Otherwise, the values reported by the underlying socket will be reported. VIRTIO_NET_F_HASH_REPORT requires VIRTIO_F_VERSION_1. Signed-off-by: Akihiko Odaki Tested-by: Lei Yang --- drivers/vhost/net.c | 68 +++++++++++++++++++++++++++-------------------------- 1 file changed, 35 insertions(+), 33 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index b9b9e9d40951..fc5b43e43a06 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -73,6 +73,7 @@ enum { VHOST_NET_FEATURES = VHOST_FEATURES | (1ULL << VHOST_NET_F_VIRTIO_NET_HDR) | (1ULL << VIRTIO_NET_F_MRG_RXBUF) | + (1ULL << VIRTIO_NET_F_HASH_REPORT) | (1ULL << VIRTIO_F_ACCESS_PLATFORM) | (1ULL << VIRTIO_F_RING_RESET) }; @@ -1097,10 +1098,6 @@ static void handle_rx(struct vhost_net *net) .msg_controllen = 0, .msg_flags = MSG_DONTWAIT, }; - struct virtio_net_hdr hdr = { - .flags = 0, - .gso_type = VIRTIO_NET_HDR_GSO_NONE - }; size_t total_len = 0; int err, mergeable; s16 headcount; @@ -1174,11 +1171,15 @@ static void handle_rx(struct vhost_net *net) /* We don't need to be notified again. */ iov_iter_init(&msg.msg_iter, ITER_DEST, vq->iov, in, vhost_len); fixup = msg.msg_iter; - if (unlikely((vhost_hlen))) { - /* We will supply the header ourselves - * TODO: support TSO. - */ - iov_iter_advance(&msg.msg_iter, vhost_hlen); + /* + * Supply virtio_net_hdr if VHOST_NET_F_VIRTIO_NET_HDR + * TODO: support TSO. + */ + if (unlikely(vhost_hlen) && + iov_iter_zero(vhost_hlen, &msg.msg_iter) != vhost_hlen) { + vq_err(vq, "Unable to write vnet_hdr at addr %p\n", + vq->iov->iov_base); + goto out; } err = sock->ops->recvmsg(sock, &msg, sock_len, MSG_DONTWAIT | MSG_TRUNC); @@ -1191,30 +1192,24 @@ static void handle_rx(struct vhost_net *net) vhost_discard_vq_desc(vq, headcount); continue; } - /* Supply virtio_net_hdr if VHOST_NET_F_VIRTIO_NET_HDR */ - if (unlikely(vhost_hlen)) { - if (copy_to_iter(&hdr, sizeof(hdr), - &fixup) != sizeof(hdr)) { - vq_err(vq, "Unable to write vnet_hdr " - "at addr %p\n", vq->iov->iov_base); - goto out; - } - } else { - /* Header came from socket; we'll need to patch - * ->num_buffers over if VIRTIO_NET_F_MRG_RXBUF - */ - iov_iter_advance(&fixup, sizeof(hdr)); - } /* TODO: Should check and handle checksum. */ + /* + * We'll need to patch ->num_buffers over if + * VIRTIO_NET_F_MRG_RXBUF or VIRTIO_F_VERSION_1 + */ num_buffers = cpu_to_vhost16(vq, headcount); - if (likely(set_num_buffers) && - copy_to_iter(&num_buffers, sizeof num_buffers, - &fixup) != sizeof num_buffers) { - vq_err(vq, "Failed num_buffers write"); - vhost_discard_vq_desc(vq, headcount); - goto out; + if (likely(set_num_buffers)) { + iov_iter_advance(&fixup, offsetof(struct virtio_net_hdr_v1, num_buffers)); + + if (copy_to_iter(&num_buffers, sizeof(num_buffers), + &fixup) != sizeof(num_buffers)) { + vq_err(vq, "Failed num_buffers write"); + vhost_discard_vq_desc(vq, headcount); + goto out; + } } + nvq->done_idx += headcount; if (nvq->done_idx > VHOST_NET_BATCH) vhost_net_signal_used(nvq); @@ -1607,10 +1602,13 @@ static int vhost_net_set_features(struct vhost_net *n, u64 features) size_t vhost_hlen, sock_hlen, hdr_len; int i; - hdr_len = (features & ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | - (1ULL << VIRTIO_F_VERSION_1))) ? - sizeof(struct virtio_net_hdr_mrg_rxbuf) : - sizeof(struct virtio_net_hdr); + if (features & (1ULL << VIRTIO_NET_F_HASH_REPORT)) + hdr_len = sizeof(struct virtio_net_hdr_v1_hash); + else if (features & ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | + (1ULL << VIRTIO_F_VERSION_1))) + hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf); + else + hdr_len = sizeof(struct virtio_net_hdr); if (features & (1 << VHOST_NET_F_VIRTIO_NET_HDR)) { /* vhost provides vnet_hdr */ vhost_hlen = hdr_len; @@ -1691,6 +1689,10 @@ static long vhost_net_ioctl(struct file *f, unsigned int ioctl, return -EFAULT; if (features & ~VHOST_NET_FEATURES) return -EOPNOTSUPP; + if ((features & ((1ULL << VIRTIO_F_VERSION_1) | + (1ULL << VIRTIO_NET_F_HASH_REPORT))) == + (1ULL << VIRTIO_NET_F_HASH_REPORT)) + return -EINVAL; return vhost_net_set_features(n, features); case VHOST_GET_BACKEND_FEATURES: features = VHOST_NET_BACKEND_FEATURES;