linux-kernel - [PATCH bpf v2 1/1] selftests/bpf: Actuate tx_metadata_len in xdp_hw

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Message-Id: <20241205044258.3155799-1-yoong.siang.song@intel.com>
Date: Thu,  5 Dec 2024 12:42:58 +0800
From: Song Yoong Siang <yoong.siang.song@...el.com>
To: Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	"David S . Miller" <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>,
	Jesper Dangaard Brouer <hawk@...nel.org>,
	John Fastabend <john.fastabend@...il.com>,
	Andrii Nakryiko <andrii@...nel.org>,
	Eduard Zingerman <eddyz87@...il.com>,
	Mykola Lysenko <mykolal@...com>,
	Martin KaFai Lau <martin.lau@...ux.dev>,
	Song Liu <song@...nel.org>,
	Yonghong Song <yonghong.song@...ux.dev>,
	KP Singh <kpsingh@...nel.org>,
	Stanislav Fomichev <sdf@...ichev.me>,
	Hao Luo <haoluo@...gle.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Shuah Khan <shuah@...nel.org>,
	Maciej Fijalkowski <maciej.fijalkowski@...el.com>
Cc: netdev@...r.kernel.org,
	bpf@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: [PATCH bpf v2 1/1] selftests/bpf: Actuate tx_metadata_len in xdp_hw_metadata

set XDP_UMEM_TX_METADATA_LEN flag to reserve tx_metadata_len bytes of
per-chunk metadata.

Fixes: d5e726d9143c ("xsk: Require XDP_UMEM_TX_METADATA_LEN to actuate tx_metadata_len")
Cc: stable@...r.kernel.org # v6.11
Signed-off-by: Song Yoong Siang <yoong.siang.song@...el.com>
Acked-by: Stanislav Fomichev <sdf@...ichev.me>
---
v1: https://patchwork.kernel.org/project/netdevbpf/patch/20241204115715.3148412-1-yoong.siang.song@intel.com/

v1->v2 changelog:
 - Add Fixes tag (Stanislav).
 - Add stable@...r.kernel.org in email cc list.
 - Separate the patch into two, current one submit to bpf,
   another one submit to bpf-next.
 - Update the commit title.
---
 tools/testing/selftests/bpf/xdp_hw_metadata.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/xdp_hw_metadata.c b/tools/testing/selftests/bpf/xdp_hw_metadata.c
index 6f9956eed797..ad6c08dfd6c8 100644
--- a/tools/testing/selftests/bpf/xdp_hw_metadata.c
+++ b/tools/testing/selftests/bpf/xdp_hw_metadata.c
@@ -79,7 +79,7 @@ static int open_xsk(int ifindex, struct xsk *xsk, __u32 queue_id)
 		.fill_size = XSK_RING_PROD__DEFAULT_NUM_DESCS,
 		.comp_size = XSK_RING_CONS__DEFAULT_NUM_DESCS,
 		.frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE,
-		.flags = XSK_UMEM__DEFAULT_FLAGS,
+		.flags = XDP_UMEM_TX_METADATA_LEN,
 		.tx_metadata_len = sizeof(struct xsk_tx_metadata),
 	};
 	__u32 idx = 0;
-- 
2.34.1