Subject: [PATCH 11/21] net: tun: record RX queue in skb before do_xdp_generic()

From: Gilberto Bertin <[email-masked]>
Date: Fri, 10 Apr 2020 18:20:59 +0200

[ Upstream commit 3fe260e00cd0bf0be853c48fcc1e19853df615bb ]

This allows netif_receive_generic_xdp() to correctly determine the RX
queue from which the skb is coming, so that the context passed to the
XDP program will contain the correct RX queue index.

Signed-off-by: Gilberto Bertin <[email-masked]>
Signed-off-by: David S. Miller <[email-masked]>
---
 drivers/net/tun.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 9de9b7d8aedd..3063f2c9fa63 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1925,6 +1925,7 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
 
 	skb_reset_network_header(skb);
 	skb_probe_transport_header(skb);
+	skb_record_rx_queue(skb, tfile->queue_index);
 
 	if (skb_xdp) {
 		struct bpf_prog *xdp_prog;
@@ -2498,6 +2499,7 @@ static int tun_xdp_one(struct tun_struct *tun,
 	skb->protocol = eth_type_trans(skb, tun->dev);
 	skb_reset_network_header(skb);
 	skb_probe_transport_header(skb);
+	skb_record_rx_queue(skb, tfile->queue_index);
 
 	if (skb_xdp) {
 		err = do_xdp_generic(xdp_prog, skb);
@@ -2509,7 +2511,6 @@ static int tun_xdp_one(struct tun_struct *tun,
 	    !tfile->detached)
 		rxhash = __skb_get_hash_symmetric(skb);
 
-	skb_record_rx_queue(skb, tfile->queue_index);
 	netif_receive_skb(skb);
 
 	/* No need for get_cpu_ptr() here since this function is
-- 
2.20.1