From patchwork Thu Mar 6 09:56:36 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Akihiko Odaki X-Patchwork-Id: 14004099 X-Patchwork-Delegate: kuba@kernel.org Received: from mail-pl1-f173.google.com (mail-pl1-f173.google.com [209.85.214.173]) (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 5322820E039 for ; Thu, 6 Mar 2025 09:57:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.173 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741255059; cv=none; b=dqdA8qkPEqBJQZSwY0hGPk/8Q/duyh75uQDjptWRN2YYCo8zCW1GMNkVBpL7j00F5KIOX2cpSCEWFjvhoPoaplruMu68W1Eyzi2lMl7uKbAuJ+km98w/FLmdGQCy6g7CLE+duffpknShpPk+dBwgNvNFTXigAVagh+t76QtE3W8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741255059; c=relaxed/simple; bh=efUQp3xn6WYS8yAIVpG+8nNESAbDYNoZwtefI4rJo8g=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To; b=MlDydmtYn9D+Qz5hVrpH/ZGWjpkAoNONkjquvX/JTOby8k9UiS+tgDS05+Eln/WaryQK2hTY7rW2BozCUzHZReVIrR10EGA+oceX7Wd9Y6sGkP54gLk2IYhJ9RxQWvZeD+bF8LAazm7z0jTL8IGlnGAx4MPiAwrRPREZiTssfiQ= 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=liTDfdTi; arc=none smtp.client-ip=209.85.214.173 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="liTDfdTi" Received: by mail-pl1-f173.google.com with SMTP id d9443c01a7336-22185cddbffso31092605ad.1 for ; Thu, 06 Mar 2025 01:57:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=daynix-com.20230601.gappssmtp.com; s=20230601; t=1741255057; x=1741859857; 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=CnuaMjhFxZ/6ziAA9dAFSZFZKEXkUeKJopwW9aMJd8c=; b=liTDfdTiAJZ/79okWEDZNcbgi7+Hp66nqq9EZCfTbn2l7x4IhDeyq5Hn/bi1lpczj0 ORpVll2qWNQ+89fV7LDV/Eh1lR8HK015UvQZu/eitRX4VLlosUTS6em93Awo6Ofqz0d8 m37RFcDHHI+c0Gbm2ZKVUwbAm54vMtsM6Mut8pwWAMDDORC48Sqm0wmsnYHKnxh+pX5o iZNrWzyJaESgGSI6LdUqfhVKnrb2k1Tbyf1jkCBYqCp8LenuvXvtzJZv50Fg+V9NLtLg dBtaf+U2HIV//gwDRQQHm3wvNZTA/sIFJf6JhUen7QfpiCZnwHEXSA3G4OcHc3/Pdwfp zBTQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741255057; x=1741859857; 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=CnuaMjhFxZ/6ziAA9dAFSZFZKEXkUeKJopwW9aMJd8c=; b=ViJCY3xX3E3GRiVPdksv1f8e16SCWnI6Mc0ktWa3MZqfwRewWw2W14nRqR/66LYvOj bYkXk9/VFPJ7v5FJ3ASdgZLuadtYZ/Cxn0VFl9b7L6/tinpUOofnPAmw8KFVHNz30/H6 ny9O15T6z/1g4JBHAL7lcS6kAuzw/d8eYBgmU1YlmoYzXD86XX6c7LA+XEVxggZf+grB 6z0YYBrpd1JWJj/AFXD4X9Ec649FagSyxHWm97+I5gmdlXJdsTIIPLO/3YTjKHgqrQy2 gb5muc0ayxdjrmDNFgEhJ1a/TIpV19rniBXC0THeH+TN4xmD7XnuxH0R7G0+XVf3UMYA ZuIw== X-Forwarded-Encrypted: i=1; AJvYcCWjcfPHZTjEpkoZDGgNbLJFUiBrudvVkF9JtwzbQlwpq1m66pW0g7LEdWsVQEcc/ku1Bm1FChs=@vger.kernel.org X-Gm-Message-State: AOJu0Yxsuv6roeT08oFLmWUS3AkvnrfUMFm0LBXAkBW+kBsh5lzFCG3P 1WqH3bioNsXLzg1ple70qRBHLhxADPDMqFa+hk5NzXq6nXKpLZMObB/0sD4jB8A= X-Gm-Gg: ASbGncuOClvinS/yfiRvkBG2AslTDop5Mllcj0IkVSaY7XYAF/A6nXIsAPtvLcGfGo8 7jdIIffK5icLHs0vCI+Ig8zM3AACja2KUs6CeEUYdw6O3DVfVaLUoxEMSduXC8f3Fp9xj6nlrhg Rwacw8cCuHgavLnpR2JwE3An3ek52FA05xsd3ZABEFRzolhcgFjaU4Hj7qJ+gycnibdKrfWK+Rp G+q8HuZu03tV4ZczxizJcYeMKqAFWPTzplUwcPpsQAyDF2jeQ4XcSoapHQx7VCC7HyxWfla5efa 1wMOFm1nzOms2wB7UilA3eJLot4nzZimbA3DFe5dft3de07Z X-Google-Smtp-Source: AGHT+IHJGksHinhnEKP7Vul6y/8p6O/KEECmCOaw6lnVXA484Y6gp9ZfN9uJUdcGYFrU6DtyYorN0g== X-Received: by 2002:a05:6a00:3397:b0:734:26c6:26d3 with SMTP id d2e1a72fcca58-73693e85ddcmr5480443b3a.5.1741255056584; Thu, 06 Mar 2025 01:57:36 -0800 (PST) Received: from localhost ([157.82.207.107]) by smtp.gmail.com with UTF8SMTPSA id d2e1a72fcca58-73698514f58sm948820b3a.133.2025.03.06.01.57.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 06 Mar 2025 01:57:36 -0800 (PST) From: Akihiko Odaki Date: Thu, 06 Mar 2025 18:56:36 +0900 Subject: [PATCH net-next v8 6/6] vhost/net: Support VIRTIO_NET_F_HASH_REPORT Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250306-rss-v8-6-7ab4f56ff423@daynix.com> References: <20250306-rss-v8-0-7ab4f56ff423@daynix.com> In-Reply-To: <20250306-rss-v8-0-7ab4f56ff423@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 0.14.2 X-Patchwork-Delegate: kuba@kernel.org 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 --- drivers/vhost/net.c | 49 +++++++++++++++++++++++++++++-------------------- 1 file changed, 29 insertions(+), 20 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index b9b9e9d40951856d881d77ac74331d914473cd56..16b241b44f89820a42c302f3586ea6bb5e0d4289 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) }; @@ -1097,9 +1098,11 @@ 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 + struct virtio_net_hdr_v1_hash hdr = { + .hdr = { + .flags = 0, + .gso_type = VIRTIO_NET_HDR_GSO_NONE + } }; size_t total_len = 0; int err, mergeable; @@ -1110,7 +1113,6 @@ static void handle_rx(struct vhost_net *net) bool set_num_buffers; struct socket *sock; struct iov_iter fixup; - __virtio16 num_buffers; int recv_pkts = 0; mutex_lock_nested(&vq->mutex, VHOST_NET_VQ_RX); @@ -1191,30 +1193,30 @@ static void handle_rx(struct vhost_net *net) vhost_discard_vq_desc(vq, headcount); continue; } + hdr.hdr.num_buffers = cpu_to_vhost16(vq, headcount); /* 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)) { + if (copy_to_iter(&hdr, vhost_hlen, + &fixup) != vhost_hlen) { vq_err(vq, "Unable to write vnet_hdr " "at addr %p\n", vq->iov->iov_base); goto out; } - } else { + } else if (likely(set_num_buffers)) { /* Header came from socket; we'll need to patch * ->num_buffers over if VIRTIO_NET_F_MRG_RXBUF */ - iov_iter_advance(&fixup, sizeof(hdr)); + iov_iter_advance(&fixup, offsetof(struct virtio_net_hdr_v1, num_buffers)); + + if (copy_to_iter(&hdr.hdr.num_buffers, sizeof(hdr.hdr.num_buffers), + &fixup) != sizeof(hdr.hdr.num_buffers)) { + vq_err(vq, "Failed num_buffers write"); + vhost_discard_vq_desc(vq, headcount); + goto out; + } } /* TODO: Should check and handle checksum. */ - 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; - } nvq->done_idx += headcount; if (nvq->done_idx > VHOST_NET_BATCH) vhost_net_signal_used(nvq); @@ -1607,10 +1609,13 @@ 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 +1696,10 @@ 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;