From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f48.google.com (mail-wr1-f48.google.com [209.85.221.48]) (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 840123F54D1 for ; Tue, 31 Mar 2026 16:01:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.48 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774972893; cv=none; b=Yd+bO8pCpOaj5Gw4hPskC6jxjYN5pmsueDKjsiSOcIdU1WcwDdxkYPrUov+kotbVJBU6H32+MIGOxdInc24TVt+xW7YDZQsxmNn+cX+QW7qU6ScXEixMSULgZRy2kT2Vob3QpZL9pI6UBl+18sK43ki5rG1uKgXL80czUVyAxLk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774972893; c=relaxed/simple; bh=UeZWnJT7iOsYzEMEYCQI2P+oNw4o6H7bxKmYK1DTknM=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=m0bpyZW3ewrDwovWH/vArw3CgMM0zZlhgW6Ql1zZAsRnvlkUDeAmHCk9qcXWSQpmhdvbVRpNGo9a2+4IziTGXcFABqtfwu7wiA9j71qZoBfibXaahVpaSCcOHOwTYi6FXT1mi2ht6se1rYQhgWLU1bXF5O/UPTAbOlI1sFsDcx8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=6wind.com; spf=pass smtp.mailfrom=6wind.com; dkim=pass (2048-bit key) header.d=6wind.com header.i=@6wind.com header.b=Yl56894w; arc=none smtp.client-ip=209.85.221.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=6wind.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=6wind.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=6wind.com header.i=@6wind.com header.b="Yl56894w" Received: by mail-wr1-f48.google.com with SMTP id ffacd0b85a97d-43b8822fc05so543648f8f.1 for ; Tue, 31 Mar 2026 09:01:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=6wind.com; s=google; t=1774972890; x=1775577690; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:organization:content-language :from:references:cc:to:subject:reply-to:user-agent:mime-version:date :message-id:from:to:cc:subject:date:message-id:reply-to; bh=vzSeNrlyjIpdA5QjVt5ncgOyFtChlyyVRQ3D9frbF90=; b=Yl56894w7vaIzS+AA30THNOEHOmLpliDAe7JgJaZ5R2fTHvMNP6Z9DdZYENBv9kWks rtL5jNhb6LKmoPK2kbpvX7KuZaXMb1MDSx0VIx6pi1D8tWBkHUHsq5Fi+Sbo2Ju1jX4m jTXv/IoLCccloojhF4s+w5Tm05/h7ifRmGb2JNn4xHCF//+aGhfTe14rmkokdZ4b/7UQ 9i8RwooFKZKDueSAMnJv033Q5fPaUyblGSGMJT02T1a4xvZnFbahjc64FdTBO2Sh/pSn y4j44tVRiNiHmuFsoKTbtpPgF0RRtTJ6M9P3yO/rwdsjGSNNqHnJp5vpY4Nncd/+mpjF icIQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774972890; x=1775577690; h=content-transfer-encoding:in-reply-to:organization:content-language :from:references:cc:to:subject:reply-to:user-agent:mime-version:date :message-id:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=vzSeNrlyjIpdA5QjVt5ncgOyFtChlyyVRQ3D9frbF90=; b=mRSSGAf1U+nzN5RwNR5xuAmGgDTQ8bTZRs4gOn1mCD2C7XLYfbXBnh9VkgAjgr2nIN 8rOT3YEL8L8dzYlgHUGyldPKQzTmaocerp+llRHA8sgaAx+08RVlnMeLH7Zcz1efWOxN R5pOjK5tCXqf68eBIR9vhbQ3q6IxjRD7qZq9CgaQbMywuJ+zrujbV5hO99VBzklonjkN /dvUVX7gf/mf+5rfAN5O2OhuHcQI3r7nDBRkbtgWuavVPGDTJCGuo+egg7V4/nSmcFRN iq6DShEo1r5o+R9jDhvEIhlfj+HZJa4hUdXwaILn1IvcXgVwEzqZsMovLyNpdhKH+RN0 yIHQ== X-Forwarded-Encrypted: i=1; AJvYcCWCFe/gth5kpLTIc7fWl2duV9wZ30sCfCEwb8EEy26AwEx9X2t8xZ7PsensVbwxYRAHGxsqYFwg0tneAho=@vger.kernel.org X-Gm-Message-State: AOJu0Yzkwat8C+BnQ0vNvacacZ2Cx76SwYcaOtdgUvuuUrPhXFxmArWX 5+8UAWJ2PODlvuOItJkPTHnpSMWQhcZNoo/+d9/XhHVSfRtz3Rp+nxHV8PZqmNlTlmU= X-Gm-Gg: ATEYQzzO2gg4oHrQdVm/HCyqSj3lh8mLjleVCrOPHrqQDGb3NkgCsGqj1HW4zYYMtD7 KAM1MLgapIIj2OsbV0eOipTbPWouJUKbFYS9tWnN26F8jUbwY5JDtiDHZFb5SICnDHmS2IAxgYx YStKvrSLcxRnJFtD2HyeZ6IQ8yKDwukfD8gZ9fnmp8moMhBxglrCUDJGfXIqxzrOFk2dpcFjsvU bIxrhUVoWDmDRZcIOl1D5NW6WVOrI08V6aUVcPo+v+ROso3MiRS6dnaBBOPkbAq0RlXfdV1sLZR McbVGsTkwDC3ZvorAOv0nRmylTbkZj84EYfzeNxF1pMgfp11wZ6xmju14T5W9jBT5fDxMSCczM6 sx8S7a8iMMf4NHQlagoCbHII1BB6z1HmPIVRjd/tVAcgTt3fvAnQ6UVWSNBeDmB6SEeTXV7EQaY QQBlb4I88nMKZYtP7pQ3td5JHsBaOyEp9QQYRzn+zaUqwTkJH4qCLEocsr8zopDPm8gkhyb3CWD je0kBXnI9ucsps= X-Received: by 2002:a05:600c:4ed3:b0:487:2439:b7c3 with SMTP id 5b1f17b1804b1-487282be016mr148577775e9.4.1774972889800; Tue, 31 Mar 2026 09:01:29 -0700 (PDT) Received: from ?IPV6:2a01:e0a:b41:c160:6a1d:efff:fe52:1959? ([2a01:e0a:b41:c160:6a1d:efff:fe52:1959]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4887e735532sm57095615e9.0.2026.03.31.09.01.28 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 31 Mar 2026 09:01:29 -0700 (PDT) Message-ID: Date: Tue, 31 Mar 2026 18:01:28 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Reply-To: nicolas.dichtel@6wind.com Subject: Re: [PATCH net 1/2] seg6: separate dst_cache for input and output paths in seg6 lwtunnel To: Andrea Mayer , netdev@vger.kernel.org Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, dsahern@kernel.org, david.lebrun@uclouvain.be, stefano.salsano@uniroma2.it, paolo.lungaroni@uniroma2.it, linux-kernel@vger.kernel.org, stable@vger.kernel.org References: <20260331110755.25042-1-andrea.mayer@uniroma2.it> <20260331110755.25042-2-andrea.mayer@uniroma2.it> From: Nicolas Dichtel Content-Language: en-US Organization: 6WIND In-Reply-To: <20260331110755.25042-2-andrea.mayer@uniroma2.it> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Le 31/03/2026 à 13:07, Andrea Mayer a écrit : > The seg6 lwtunnel uses a single dst_cache per encap route, shared > between seg6_input_core() and seg6_output_core(). These two paths > can perform the post-encap SID lookup in different routing contexts > (e.g., ip rules matching on the ingress interface, or VRF table > separation). Whichever path runs first populates the cache, and the > other reuses it blindly, bypassing its own lookup. > > Fix this by splitting the cache into cache_input and cache_output, > so each path maintains its own cached dst independently. > > Fixes: 6c8702c60b88 ("ipv6: sr: add support for SRH encapsulation and injection with lwtunnels") > Cc: stable@vger.kernel.org > Signed-off-by: Andrea Mayer Reviewed-by: Nicolas Dichtel Thanks, Nicolas