---
...to-xdpsock-to-avoid-recycling-frames.patch | 62 +++++++++++++++++++
1 file changed, 62 insertions(+)
create mode 100644 0001-samples-bpf-fix-to-xdpsock-to-avoid-recycling-frames.patch
diff --git a/0001-samples-bpf-fix-to-xdpsock-to-avoid-recycling-frames.patch b/0001-samples-bpf-fix-to-xdpsock-to-avoid-recycling-frames.patch
new file mode 100644
index 000000000000..ae3b99b335e2
--- /dev/null
+++ b/0001-samples-bpf-fix-to-xdpsock-to-avoid-recycling-frames.patch
@@ -0,0 +1,62 @@
+From df0a23a79c9dca96c0059b4d766a613eba57200e Mon Sep 17 00:00:00 2001
+From: Weqaar Janjua <weqaar.a.janjua@xxxxxxxxx>
+Date: Fri, 28 Aug 2020 13:36:32 +0100
+Subject: [PATCH bpf-next] samples/bpf: fix to xdpsock to avoid recycling
+ frames
+To: magnus.karlsson@xxxxxxxxx
+
+The txpush program in the xdpsock sample application is supposed
+to send out all packets in the umem in a round-robin fashion.
+The problem is that it only cycled through the first BATCH_SIZE
+worth of packets. Fixed this so that it cycles through all buffers
+in the umem as intended.
+
+Fixes: 248c7f9c0e21 ("samples/bpf: convert xdpsock to use libbpf for AF_XDP access")
+Signed-off-by: Weqaar Janjua <weqaar.a.janjua@xxxxxxxxx>
+---
+ samples/bpf/xdpsock_user.c | 10 +++++-----
+ 1 file changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c
+index 19c679456a0e..c821e9867139 100644
+--- a/samples/bpf/xdpsock_user.c
++++ b/samples/bpf/xdpsock_user.c
+@@ -1004,7 +1004,7 @@ static void rx_drop_all(void)
+ }
+ }
+
+-static void tx_only(struct xsk_socket_info *xsk, u32 frame_nb, int batch_size)
++static void tx_only(struct xsk_socket_info *xsk, u32 *frame_nb, int batch_size)
+ {
+ u32 idx;
+ unsigned int i;
+@@ -1017,14 +1017,14 @@ static void tx_only(struct xsk_socket_info *xsk, u32 frame_nb, int batch_size)
+ for (i = 0; i < batch_size; i++) {
+ struct xdp_desc *tx_desc = xsk_ring_prod__tx_desc(&xsk->tx,
+ idx + i);
+- tx_desc->addr = (frame_nb + i) << XSK_UMEM__DEFAULT_FRAME_SHIFT;
++ tx_desc->addr = (*frame_nb + i) << XSK_UMEM__DEFAULT_FRAME_SHIFT;
+ tx_desc->len = PKT_SIZE;
+ }
+
+ xsk_ring_prod__submit(&xsk->tx, batch_size);
+ xsk->outstanding_tx += batch_size;
+- frame_nb += batch_size;
+- frame_nb %= NUM_FRAMES;
++ *frame_nb += batch_size;
++ *frame_nb %= NUM_FRAMES;
+ complete_tx_only(xsk, batch_size);
+ }
+
+@@ -1080,7 +1080,7 @@ static void tx_only_all(void)
+ }
+
+ for (i = 0; i < num_socks; i++)
+- tx_only(xsks[i], frame_nb[i], batch_size);
++ tx_only(xsks[i], &frame_nb[i], batch_size);
+
+ pkt_cnt += batch_size;
+
+--
+2.20.1
+
--
2.20.1
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