From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f172.google.com (mail-pf1-f172.google.com [209.85.210.172]) (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 19BC52356C6 for ; Tue, 17 Feb 2026 14:32:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771338774; cv=none; b=ZgwVlZdcDMXEtlQEvwqlFcEnoX61g/ZoJN87IE1JRQuQEtHZbrQYXT6b/JEw5d51EshfxBs4WQyO6Etyw16H/pttcWoBXkG1OU02Y9Oi3saq0fGKGWYnfdgwKu/opwg+YholIir+6AiOaZIl8IzAIwD6exajIzjkVtQBPa7a+gY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771338774; c=relaxed/simple; bh=51regzvlTrVRH572VciJP3Jr6oOu0PTdqVUzOG+7Q04=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=qmpY7Gjifs/qNZH2L3cFOFr9WILeuIKl9Vl85d582XP4f5afo41/Ch4n3vnXX29Uu+dM+u2cNpb7RzutbluMbiepiIHY25sm5d+0hmWNuPPSYTr+TidsOaGNrNHgPzDJjstfC3W6F+UHm8Ms6nguPhR0DwJ6FJYZxBFfXADEEyk= 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=ex99wPKg; arc=none smtp.client-ip=209.85.210.172 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="ex99wPKg" Received: by mail-pf1-f172.google.com with SMTP id d2e1a72fcca58-824ac5d28f9so3150969b3a.0 for ; Tue, 17 Feb 2026 06:32:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1771338772; x=1771943572; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=PK3wDL94RvHZRaijVfhwQjim8sVJxa74bWIAAhmdngQ=; b=ex99wPKg+lacYDsbqnotYbdhN4dKn4VV6owBRBU8C/ftWz48u3R+0dMm5GOCbFgMDS Wh8HQrqDkXYrftzuKjPqcG3Ac2ZsTkeB6TAgZphCNBFcVaNmeEMbkA5KWzGcOj2ClICa OWQloX+gN2Qn1Z9LOSq1A0exgdbVA4KcJ1KWjcVgPwHrItugsc+8BlO+IBtB7xtQuIsr tHzkMmPe1mCgpzPz012mF2gAGA/InXEZ/xKfJzouyO49tCdCvSiY7jnjdk+kR8OB9v0Z cD47ufU4/7TOB+ojRl5M7E1CLe3p4u4i6HfCEx1iARCAkWf0y+byy8OeoRrHEhEPkNS6 8pZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1771338772; x=1771943572; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=PK3wDL94RvHZRaijVfhwQjim8sVJxa74bWIAAhmdngQ=; b=E24pc5h5NkyLjq7n1ZNIsKQ6Yt7cxyJNLpengdIZd2EuQVqCem8X9/m5PeiapBq1m2 FCPsUhtVmouY212UWJDL+ahg5iP7PlnHnnNPk0gu/IW2c2GRUKLVD+gErgwMDuUcAJQm t2wHFL5gOIjQp7u/M4g03B6lF8IXZU7CEn4JiAG14uU6eNdFpsyfM7oJO6rX9rCucW1j lOr9WjY80So9bPSu6JlNQ/KLR8x/wA57lPzUtXZKAowLB5mG7yFkKUSgqDk2Hg6pfM1v GdRDKCx0l2zkycGCDzebT0Sj7c7Ybg1YU8jrWe74O3ZqPVrzLfaSJdMDPHXQT+yh3owE gyRw== X-Forwarded-Encrypted: i=1; AJvYcCWc2jeQAnBU9FLPVD667iQlFOmC5Xi1uV2brUPl/muYvLd59oN6JgI6ei8xSlGtVSiGvv+FJxA=@vger.kernel.org X-Gm-Message-State: AOJu0Ywkls4iq9qDOB4fG5Q7hxBAKcSnyP3YHqIl9ROtZSi5BwA5/nxH h3xT7y01nZg7Hyd/+i/GSRJTTyBBfcm50QCqJThxpYH1/VspQ8TxwXb7 X-Gm-Gg: AZuq6aKr4Yvzwzxmse6fn04IRC5HnqXNGdqq1/ehj19zeQCI3dnQ1QibFBxZNNkodaL fRCX4VFuLmJuL+zemLp2IWEnVsXSNQ82gIaY3i0XnedItYLxeksEWq+BeggqE+/jRvO+3YpJP86 erJZaoBN24JpExp7kkOu7qc3aHGeb6Q2G2vZcJWlqAPQfEPergmrRBorOhws0DhhsXGho49nvey MHFfgqmkxKkqfhUQFHu7Lbg1SMzjpTnFbD3jJBjo+h3f0vZXrSGOaSBtfuE6qPwyhoKK/f5kpCd zBI3dK0SIHEAiIq1GfD0D8sDle6rPiKtpdMd0yaxX6Bru6TuM/CSKmZQW1x7PQcZTzOVueNHE9L nPhNvMdlsQpwjhzEIplVU58a6OOFABlKLc999yuay7YOWrsgjYx8fuBvZSdSL+Y+h21XKSfS9uw zCjmJ60ySLaVacc0O4rRX5wyoj2x4RsJT0wUmwp2vIVqx4eQsgBD/S3XpcEoSD6oxZ2dGqQy+51 Zp8pJZ/gNp1Tml+4g+Z X-Received: by 2002:a05:6a00:3c90:b0:81f:2140:136d with SMTP id d2e1a72fcca58-824d951713emr10954343b3a.23.1771338772337; Tue, 17 Feb 2026 06:32:52 -0800 (PST) Received: from localhost.localdomain ([49.207.200.244]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-824c6b935c6sm14770821b3a.47.2026.02.17.06.32.45 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Tue, 17 Feb 2026 06:32:51 -0800 (PST) From: Anand Kumar Shaw To: bpf@vger.kernel.org, netdev@vger.kernel.org Cc: ast@kernel.org, daniel@iogearbox.net, hawk@kernel.org, john.fastabend@gmail.com, davem@davemloft.net, kuba@kernel.org, sdf@fomichev.me, edumazet@google.com, pabeni@redhat.com, horms@kernel.org, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, kpsingh@kernel.org, haoluo@google.com, jolsa@kernel.org, linux-kernel@vger.kernel.org, Anand Kumar Shaw Subject: [PATCH 0/2] xdp: propagate rx queue_index through xdp_frame Date: Tue, 17 Feb 2026 20:02:40 +0530 Message-Id: <20260217143242.4404-1-anandkrshawheritage@gmail.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit When an XDP frame is redirected via cpumap or devmap, the original RX queue index is lost. BPF programs running on the second-stage (SEC("xdp/cpumap") or SEC("xdp/devmap")) always see ctx->rx_queue_index as 0, and SKBs built from xdp_frame lack proper RX queue metadata. This series adds a queue_index field to struct xdp_frame, populates it during the xdp_buff to xdp_frame conversion (both normal and zero-copy paths), and consumes it in cpumap and devmap when reconstructing xdp_rxq_info. It also calls skb_record_rx_queue() in __xdp_build_skb_from_frame(), resolving a documented gap. Patch 1 adds the field and populates it in the conversion paths. Patch 2 sets rxq.queue_index in cpumap and devmap, resolving a TODO left since the original cpumap implementation. struct xdp_frame grows by 4 bytes (40 -> 44 bytes), still within a single 64-byte cacheline. Anand Kumar Shaw (2): xdp: propagate queue_index through xdp_frame bpf: report queue_index to xdp_rxq_info in cpumap and devmap include/net/xdp.h | 2 ++ kernel/bpf/cpumap.c | 2 +- kernel/bpf/devmap.c | 1 + net/core/xdp.c | 3 ++- 4 files changed, 6 insertions(+), 2 deletions(-) -- 2.39.5 (Apple Git-154)