From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ua2-f43.google.com (mail-ua2-f43.google.com [74.125.226.235]) (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 E4A1A3DF001 for ; Wed, 16 Sep 2026 20:50:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.226.235 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789591854; cv=none; b=srUcEJ63JcfvL9/2CrFmAUylzOGmwXI25b8gsHZvBBxg6glle5KKWlE6FztKnrtAUnQNkIqY6Mu9eJoVkhit3Reo8U0t4wJG1ybAgBnU4k7UZ/JdpU85gKl9DSkw6SWdNr7Bqa7h+xllTC0n5Lp3MYREnTzKFAHT5KsPI1sllBM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789591854; c=relaxed/simple; bh=r4G5Ta8DgCpNKxXd+Tmp2CKseIRyFZZjfIzJ3sbKUC4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZiWfGlIb0Fam3lHoofQ09WXaZviGjANYSUKvq95xoGngnsjEnJc5rBRWMMFfdx62DewvtAq/K2EW3d2pAwqg1foaHdobXY4RYjHD9HnYgB7KRGFnzQmG73mmBAbib1u0ZUGY/J1mtnKX61xFapDNNYOdDzmWT/Z4IB5nt+2628c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=AcCB7A90; arc=none smtp.client-ip=74.125.226.235 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="AcCB7A90" Received: by mail-ua2-f43.google.com with SMTP id a1e0cc1a2514c-97ea1a712deso42919241.3 for ; Wed, 16 Sep 2026 13:50:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1789591828; x=1790196628; darn=vger.kernel.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:content-type; bh=HSr0kw5vQg14RdBAH3z3ZmTLwP6SZgfcuyqihKeKt2U=; b=AcCB7A90RXmTOiPQFMW3SPPCkzaWVe4pHvC0LQq1VQOXzdJVz7ziHkjWmnToVUSERZ mXkq/7xTHDQN7VjYmHwHaKgLH23IAalRbJWXCmX5jyt1Y6H27KoMA0ZajKbsXf2pn1Oy 91GqAEMvkIBzFJ5Yh01JddAjIstioH6YcYKDY2duina3s5TMxzN6ovc4y4O2ak8BUUg5 JU1ssB3HwBFX8jb85MkO1pCa62zp9nbTg+VjllAKotDfV1safHXglObHxjWf2HXdKGce 4kfd7urAOoLAe8oXk4yjG98gCxe6MbrtUIVV60z5icDUyBILoB/kAQ4+DWZKskQ5W+ox Y5bg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789591828; x=1790196628; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=HSr0kw5vQg14RdBAH3z3ZmTLwP6SZgfcuyqihKeKt2U=; b=WXy4OV8flpoGhAEGDut+AnY+7gzAbdM4hpUEjjJJQtl+hNsrvyC5tjdFM21oC+0e92 yuZA0B0coZ8iT7vLG312VLHBajPAkDLMCqgOBKZSgNqJQo1/wre/sQxQNutVgHrhHpve 1wjISY5aQbV30cEwWHa3unmidL0LhnRzRGsKkvwBH96U31qzNL35rMSWqrOv/3FDnTz0 L0it1I5Hw9AWjNQCz8Aic5M3FvhratfieDOmZ2PbLuCziGS+35UeKHYytfM2uUKJwijT Ry9qBwjP7LYDShcqyubDBABZADyddwjiitI1MTdLXntOw8A4EIYO8E08QeGvbv6hkMsO DA0A== X-Forwarded-Encrypted: i=1; AKwUvBwWswqc11qbuYTdNTuWE3XiF2dd8DoAsapyx2WG6hctavEAf17OZziy14VuFEuyR2ec2vKS/gk=@vger.kernel.org X-Gm-Message-State: AFuF++lBeP8lsLpvwwae2w5CwftazVB65ZbTZI53fSFuHf6BzQo22gA2 tzTsRk+Nbs/vsgen3cYWWMua05PpV9tlBW2z8OLzCWmQeOMdjkr8ToGj X-Gm-Gg: AYBFou0DzDMP4q5JgQq4wxw7GGinmpyv/lHVqCmd4269qEB4gxSMEhj1i+GS/GN1/Ro wDVp838CXNzT7NV5inSaGg35v5oS6Lz5WHGns6lSm0/F+I9N00lsdk41BqtZLxuJNmcauHGg1DK QyyAu6g9xM9MeTL1QyRD5+J6+MFJY0OAcfRzYpH0AG5R58HCgvYmbY9JSHMHGvVLDc1tEJACF0E CpcXhfsRc4c6Hw9WUgJ5pHdnhe2d8OVqlOyk2EzL0T920hOdhLLalIZEk43C7e7kfohsm2TQhcp uG7ceDJamJkWtqI1B6ZVfimbsb6nX4pxCwi7LQbOVOFRVdehp1EiejtVH3FWdEvPByVhr+JtjHw w27Xwo1V0e4joEJzT66jpoHB/F4yvg531SW2O6pMHZGvuiu4FCfv1AK7aQvfXnKPnDc9+TgFgay FSiKjNJk4zem41WFJGua2ThRcOgSmwodViyCddnEErzMKILbu0R0SaIXI3HEmYbpKq X-Received: by 2002:a05:6102:f9c:b0:7a1:f7d2:e80d with SMTP id ada2fe7eead31-7a1f7e27e6bmr657555137.21.1789591828210; Wed, 16 Sep 2026 13:50:28 -0700 (PDT) Received: from adriano ([190.215.95.120]) by smtp.gmail.com with ESMTPSA id a1e0cc1a2514c-9832354a8aasm947799241.10.2026.09.16.13.50.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Sep 2026 13:50:27 -0700 (PDT) From: Adriano Cordova To: Simon Horman , Julian Anastasov Cc: Pablo Neira Ayuso , Florian Westphal , Phil Sutter , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shuah Khan , netdev@vger.kernel.org, lvs-devel@vger.kernel.org, netfilter-devel@vger.kernel.org, Adriano Cordova Subject: [PATCH v3 nf-next 1/3] ipvs: add flags for per-service secure TCP state table Date: Wed, 16 Sep 2026 17:50:02 -0300 Message-ID: <20260916205004.647194-2-adrianox@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260916205004.647194-1-adrianox@gmail.com> References: <20260916205004.647194-1-adrianox@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add IP_VS_SVC_F_SECURE_TCP to mark a virtual service for the DoS-hardened TCP connection state table, and IP_VS_CONN_F_SECURE_TCP to carry that capability on a connection so the TCP state machine can select the hardened table for it. The service flag is 0x0100: bits 0x0008/0x0010/0x0020 are the scheduler bits, so leave 0x0040/0x0080 free for schedulers. Set IP_VS_CONN_F_SECURE_TCP on every connection bound to a destination whose service carries IP_VS_SVC_F_SECURE_TCP. Signed-off-by: Adriano Cordova --- Changes in v2: - Let IP_VS_SVC_F_SECURE_TCP be 0x0100, leaving 0x0040/0x0080 free for scheduler flags. - Let IP_VS_CONN_F_SECURE_TCP be (1 << 17) and drop it from IP_VS_CONN_F_BACKUP_MASK. - Set the flag in ip_vs_bind_dest() instead of at every ip_vs_conn_new() call site. (no changes since v2) include/uapi/linux/ip_vs.h | 2 ++ net/netfilter/ipvs/ip_vs_conn.c | 4 ++++ net/netfilter/ipvs/ip_vs_core.c | 3 +++ 3 files changed, 9 insertions(+) diff --git a/include/uapi/linux/ip_vs.h b/include/uapi/linux/ip_vs.h index 2c37c6ac7525..ade170109ff4 100644 --- a/include/uapi/linux/ip_vs.h +++ b/include/uapi/linux/ip_vs.h @@ -27,6 +27,7 @@ #define IP_VS_SVC_F_SCHED_SH_FALLBACK IP_VS_SVC_F_SCHED1 /* SH fallback */ #define IP_VS_SVC_F_SCHED_SH_PORT IP_VS_SVC_F_SCHED2 /* SH use port */ +#define IP_VS_SVC_F_SECURE_TCP 0x0100 /* use the hardened TCP table */ /* * IPVS sync daemon states @@ -105,6 +106,7 @@ /* Flags that are not sent to backup server start from bit 16 */ #define IP_VS_CONN_F_NFCT (1 << 16) /* use netfilter conntrack */ +#define IP_VS_CONN_F_SECURE_TCP (1 << 17) /* use the hardened TCP table */ /* Connection flags from destination that can be changed by user space */ #define IP_VS_CONN_F_DEST_MASK (IP_VS_CONN_F_FWD_MASK | \ diff --git a/net/netfilter/ipvs/ip_vs_conn.c b/net/netfilter/ipvs/ip_vs_conn.c index 6fa3e1dc534c..0b465298b64b 100644 --- a/net/netfilter/ipvs/ip_vs_conn.c +++ b/net/netfilter/ipvs/ip_vs_conn.c @@ -1090,6 +1090,7 @@ ip_vs_bind_dest(struct ip_vs_conn *cp, struct ip_vs_dest *dest) { unsigned int conn_flags; __u32 flags; + struct ip_vs_service *svc; /* if dest is NULL, then return directly */ if (!dest) @@ -1102,6 +1103,9 @@ ip_vs_bind_dest(struct ip_vs_conn *cp, struct ip_vs_dest *dest) if (cp->protocol != IPPROTO_UDP) conn_flags &= ~IP_VS_CONN_F_ONE_PACKET; flags = cp->flags; + svc = rcu_dereference(dest->svc); + if (svc && (svc->flags & IP_VS_SVC_F_SECURE_TCP)) + flags |= IP_VS_CONN_F_SECURE_TCP; /* Bind with the destination and its corresponding transmitter */ if (flags & IP_VS_CONN_F_SYNC) { /* Synced conns are hashed, so they can not get this flag */ diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c index ba0957798bad..aa8a3a964ffd 100644 --- a/net/netfilter/ipvs/ip_vs_core.c +++ b/net/netfilter/ipvs/ip_vs_core.c @@ -784,6 +784,9 @@ int ip_vs_leave(struct ip_vs_service *svc, struct sk_buff *skb, IP_VS_CONN_F_ONE_PACKET : 0; union nf_inet_addr daddr = { .all = { 0, 0, 0, 0 } }; + if (svc->flags & IP_VS_SVC_F_SECURE_TCP) + flags |= IP_VS_CONN_F_SECURE_TCP; + /* create a new connection entry */ IP_VS_DBG(6, "%s(): create a cache_bypass entry\n", __func__); { -- 2.51.0