From nobody Wed Mar 12 17:57:20 2025 Received: from mail-wm1-f52.google.com (mail-wm1-f52.google.com [209.85.128.52]) (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 E22FC25A2CC for ; Tue, 11 Mar 2025 12:03:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.52 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741694606; cv=none; b=q06MSBCHCcLf7aiVsY2SmJrpKfxFywVDqugwa42dANZrljAjgc80cPZpYijOwrfqMP1XhwT5uL94ZbslTud6jtLijStTk3pNKhfw3g24rxOgVhS1QiFzQCYub0qiSuBa0j7PciVgCvCM1XS2CpwNO5cmzDelpHmdiZoqCaqrs3I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741694606; c=relaxed/simple; bh=7s5Bx5ZbjMC4zD/dWY2YaXmrMwndZtJGYPhF85ahL20=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=SwH66KTp11Oa7jLYVASzPq+nCI2bwyAOnDjG4eHPXEPBoMHvs2bkQvmPAiQ5XD9kpmggEddt8XbN8Q+Jrqnsh6bkAsf5+1FAVWTz0KExvDD9MacF6UNQDRkSttLtOHKvfHTqcw5O31zfzdnW0ljmRu20F+4ZARcwftZXNB2H49M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=openvpn.net; spf=pass smtp.mailfrom=openvpn.com; dkim=pass (2048-bit key) header.d=openvpn.net header.i=@openvpn.net header.b=hHXG00W4; arc=none smtp.client-ip=209.85.128.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=openvpn.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=openvpn.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=openvpn.net header.i=@openvpn.net header.b="hHXG00W4" Received: by mail-wm1-f52.google.com with SMTP id 5b1f17b1804b1-43948f77f1aso31871845e9.0 for ; Tue, 11 Mar 2025 05:03:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=openvpn.net; s=google; t=1741694598; x=1742299398; darn=vger.kernel.org; h=cc: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=aj7l3JFxkV3JUIYqy4m5tX6xQCQ8lcKyoxKw7Xhd+jo=; b=hHXG00W4oYFLhLZ+DN+61B6ZQg45eviR66cjBJSyT6ln8U8nnjk5xoXjipVJBLK6VZ z9JVx83V6Gkrr8p2D7bkY7ZEL2niLpU9bpHsMe+7CYtC+zWa3TJD0al9OvCdA4TcmnG3 qQAPQxsAjAJlYKs0UF1HL9ul1Osl748MdBwPIBHb5Ea58qNsZDSZoBOVXXz34ve8sKSL uZo3fYS2fzlKBgHZYE0wrNqTEEEtgr7z7NqcqKwSb5nwTR98c51h5nYacm/1HFvb/nkv 9C2i++PlxGZYgqN1p8xBgqEdJg62gnzQkIHHkwOYghWZ4zR9Z19OQze5lxrsZK9KKVY7 cjuA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741694598; x=1742299398; h=cc: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=aj7l3JFxkV3JUIYqy4m5tX6xQCQ8lcKyoxKw7Xhd+jo=; b=ukrf9p1zDTMgWKBjKCmKinBMkQSKx/plCxzD9eO3G12ksNhe2qWDPvhztk05w4al99 Qu8LJSSyQ6e1beNZuom6t1cZTQBMKC3YesUSoUUxjUkugB4sR79oSAJXhTFj4er5P1oI 33xPkzcmhJ2VcrFkEjNgEHNCFBi5A0+OnupNYqanwr7tlv3CG14gqP69qgu+lxP+iD83 VJWzTUnKHkHZtfv4Ynff843uImaUpTOawRiAxf2yTNry9VAGr4m5K6PrGYoXm1atSGQm +isVMyNG5AsFcXb0KSnkOr5id3lt+KbEek3a5wkPMLo6SZOIjZN4G7mXVfcNukZdnzFy wDXw== X-Forwarded-Encrypted: i=1; AJvYcCVWvVW9OqN+4v6hLEXJ+8pQ/C+coUGvpjkC0ocSK2uE2dzloYGVKFERYnt/E38T7zIEiCKfD1uFV0CJOYs=@vger.kernel.org X-Gm-Message-State: AOJu0Yzmlcg9ZZ6fKkPtwc6xXYEDVQqK8SNW0nyTpx1aAHD5kxyov91L Z0EIPj9FXCEUyNYYJUySLoNPFP/kj+BGjikEW/NvXYuy6A7ZOLwF6MLUtmuiUvsUWWwi4UZlvua 8 X-Gm-Gg: ASbGnctpmhpcCimaz060dkZDVAftd4IUqOrldqefv3QRrP6l9v8cW74ragEcDsVIjyC Y8fmU1/PdR66cvp0LbbSLpRcDdRH0ItP4E6JUMIV0Cw8HyTq5KnowNAscopR2OnzlBbVa3PTv1r yc9yaDKMxNjz0/3R/VSgSWkqM7PiM5luBbLB9VIaWRUaoV10Ita9DMONbQZhOOapGygwGT7Bm9+ Dn13royhxvRI5NgbCFwkbBLMr/EfiqElAceZbDkuOc7s3vBfuEpLaDZmwnfHGah8DNx8mW/l6OY jmfXNsHEFLCqiQ/evhj9f2cJo9dBme9Ydf306j4ORg== X-Google-Smtp-Source: AGHT+IF+d6JvFBfJOHeAIXvtZqiiuLeusCJMghibRmIueZgBdSmvrHcvNSuL/1M+sgdeOMHcKwsskQ== X-Received: by 2002:a05:600c:3b13:b0:43d:b3:f95 with SMTP id 5b1f17b1804b1-43d00b313bemr47399265e9.28.1741694598471; Tue, 11 Mar 2025 05:03:18 -0700 (PDT) Received: from [127.0.0.1] ([2001:67c:2fbc:1:52de:66e8:f2da:9714]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43ceafc09d5sm110537605e9.31.2025.03.11.05.03.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Mar 2025 05:03:18 -0700 (PDT) From: Antonio Quartulli Date: Tue, 11 Mar 2025 13:02:13 +0100 Subject: [PATCH net-next v22 12/23] skb: implement skb_send_sock_locked_with_flags() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250311-b4-ovpn-v22-12-2b7b02155412@openvpn.net> References: <20250311-b4-ovpn-v22-0-2b7b02155412@openvpn.net> In-Reply-To: <20250311-b4-ovpn-v22-0-2b7b02155412@openvpn.net> To: netdev@vger.kernel.org, Eric Dumazet , Jakub Kicinski , Paolo Abeni , Donald Hunter , Antonio Quartulli , Shuah Khan , sd@queasysnail.net, ryazanov.s.a@gmail.com, Andrew Lunn Cc: Simon Horman , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, Xiao Liang X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=3763; i=antonio@openvpn.net; h=from:subject:message-id; bh=7s5Bx5ZbjMC4zD/dWY2YaXmrMwndZtJGYPhF85ahL20=; b=owGbwMvMwMHIXfDUaoHF1XbG02pJDOkX1Apbk5+7SxgVsXec/t7br/C+7i9TjDFbw5ukf5xrD GufPMzsZDRmYWDkYJAVU2SZufpOzo8rQk/uxR/4AzOIlQlkCgMXpwBMRLeB/Z9Corxm3ye5vzFS HnMmTPnasnfWp9tthYuFf3huYjjxbXXC1etMHHm6M3YoMvP8iXqc+VfKqOZIGeM/9+RAybkFOle PNc6qbJWw3d9vL3i5mGP29C/JXd8fVbzMmJEmXF518o5nnVrAT/XOaoHyNa8v5VRkODuc8mFY1/ bA6FLDHrdbzXOTi3Yf//1kl7ffw4l88+1vclS5BHBZxW/Yveyb2C5J3yRFxumdKydeqFh/mWeHg NMaCbMA++TFqjnMXUFVamnn9ORrVv4IiVzpHv4x9bF80sm3miyRhTNdQ3wkIk+ER1y71n47r73v VIzX6n/52xZ2i/Gb5dXe7pmq+GyVBYvQLVeWu042ddZNAA== X-Developer-Key: i=antonio@openvpn.net; a=openpgp; fpr=CABDA1282017C267219885C748F0CCB68F59D14C When sending an skb over a socket using skb_send_sock_locked(), it is currently not possible to specify any flag to be set in msghdr->msg_flags. However, we may want to pass flags the user may have specified, like MSG_NOSIGNAL. Extend __skb_send_sock() with a new argument 'flags' and add a new interface named skb_send_sock_locked_with_flags(). Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: Simon Horman Signed-off-by: Antonio Quartulli --- include/linux/skbuff.h | 2 ++ net/core/skbuff.c | 18 +++++++++++++----- 2 files changed, 15 insertions(+), 5 deletions(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 14517e95a46c4e6f9a04ef7c7193b82b5e145b28..afd694b856b0dee3a657f23cb92= cdd33885efbb1 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -4162,6 +4162,8 @@ int skb_splice_bits(struct sk_buff *skb, struct sock = *sk, unsigned int offset, unsigned int flags); int skb_send_sock_locked(struct sock *sk, struct sk_buff *skb, int offset, int len); +int skb_send_sock_locked_with_flags(struct sock *sk, struct sk_buff *skb, + int offset, int len, int flags); int skb_send_sock(struct sock *sk, struct sk_buff *skb, int offset, int le= n); void skb_copy_and_csum_dev(const struct sk_buff *skb, u8 *to); unsigned int skb_zerocopy_headlen(const struct sk_buff *from); diff --git a/net/core/skbuff.c b/net/core/skbuff.c index ab8acb737b93299f503e5c298b87e18edd59d555..bd627cfea8052faf3e9e745291b= 54ed22d2e7ed3 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -3239,7 +3239,7 @@ static int sendmsg_unlocked(struct sock *sk, struct m= sghdr *msg) =20 typedef int (*sendmsg_func)(struct sock *sk, struct msghdr *msg); static int __skb_send_sock(struct sock *sk, struct sk_buff *skb, int offse= t, - int len, sendmsg_func sendmsg) + int len, sendmsg_func sendmsg, int flags) { unsigned int orig_len =3D len; struct sk_buff *head =3D skb; @@ -3257,7 +3257,7 @@ static int __skb_send_sock(struct sock *sk, struct sk= _buff *skb, int offset, kv.iov_base =3D skb->data + offset; kv.iov_len =3D slen; memset(&msg, 0, sizeof(msg)); - msg.msg_flags =3D MSG_DONTWAIT; + msg.msg_flags =3D MSG_DONTWAIT | flags; =20 iov_iter_kvec(&msg.msg_iter, ITER_SOURCE, &kv, 1, slen); ret =3D INDIRECT_CALL_2(sendmsg, sendmsg_locked, @@ -3294,7 +3294,8 @@ static int __skb_send_sock(struct sock *sk, struct sk= _buff *skb, int offset, while (slen) { struct bio_vec bvec; struct msghdr msg =3D { - .msg_flags =3D MSG_SPLICE_PAGES | MSG_DONTWAIT, + .msg_flags =3D MSG_SPLICE_PAGES | MSG_DONTWAIT | + flags, }; =20 bvec_set_page(&bvec, skb_frag_page(frag), slen, @@ -3340,14 +3341,21 @@ static int __skb_send_sock(struct sock *sk, struct = sk_buff *skb, int offset, int skb_send_sock_locked(struct sock *sk, struct sk_buff *skb, int offset, int len) { - return __skb_send_sock(sk, skb, offset, len, sendmsg_locked); + return __skb_send_sock(sk, skb, offset, len, sendmsg_locked, 0); } EXPORT_SYMBOL_GPL(skb_send_sock_locked); =20 +int skb_send_sock_locked_with_flags(struct sock *sk, struct sk_buff *skb, + int offset, int len, int flags) +{ + return __skb_send_sock(sk, skb, offset, len, sendmsg_locked, flags); +} +EXPORT_SYMBOL_GPL(skb_send_sock_locked_with_flags); + /* Send skb data on a socket. Socket must be unlocked. */ int skb_send_sock(struct sock *sk, struct sk_buff *skb, int offset, int le= n) { - return __skb_send_sock(sk, skb, offset, len, sendmsg_unlocked); + return __skb_send_sock(sk, skb, offset, len, sendmsg_unlocked, 0); } =20 /** --=20 2.48.1