linux-kernel - [PATCH] bpf: cpumap: report Rx queue index to xdp_rxq

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Message-Id: <20250609173851.778-1-ujwal.kundur@gmail.com>
Date: Mon,  9 Jun 2025 23:08:52 +0530
From: Ujwal Kundur <ujwal.kundur@...il.com>
To: ast@...nel.org,
	daniel@...earbox.net,
	davem@...emloft.net,
	kuba@...nel.org,
	hawk@...nel.org,
	john.fastabend@...il.com,
	andrii@...nel.org,
	martin.lau@...ux.dev,
	eddyz87@...il.com,
	song@...nel.org,
	yonghong.song@...ux.dev,
	kpsingh@...nel.org,
	sdf@...ichev.me,
	aoluo@...gle.com,
	jolsa@...nel.org
Cc: netdev@...r.kernel.org,
	bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Ujwal Kundur <ujwal.kundur@...il.com>
Subject: [PATCH] bpf: cpumap: report Rx queue index to xdp_rxq_info

Refer to the Rx queue using a XDP frame's attached netdev and ascertain
the queue index from it.

Signed-off-by: Ujwal Kundur <ujwal.kundur@...il.com>
---
 kernel/bpf/cpumap.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/bpf/cpumap.c b/kernel/bpf/cpumap.c
index 67e8a2fc1a99..8230292deac1 100644
--- a/kernel/bpf/cpumap.c
+++ b/kernel/bpf/cpumap.c
@@ -34,6 +34,7 @@
 #include <linux/btf_ids.h>
 
 #include <linux/netdevice.h>
+#include <net/netdev_rx_queue.h>
 #include <net/gro.h>
 
 /* General idea: XDP packets getting XDP redirected to another CPU,
@@ -196,7 +197,7 @@ static int cpu_map_bpf_prog_run_xdp(struct bpf_cpu_map_entry *rcpu,
 
 		rxq.dev = xdpf->dev_rx;
 		rxq.mem.type = xdpf->mem_type;
-		/* TODO: report queue_index to xdp_rxq_info */
+		rxq.queue_index = get_netdev_rx_queue_index(xdpf->dev_rx->_rx);
 
 		xdp_convert_frame_to_buff(xdpf, &xdp);
 
-- 
2.20.1