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Message-Id: <7c403a3a043554df3ebe4b4a94b8e0d97414cb7e.1674737592.git.lorenzo@kernel.org>
Date: Thu, 26 Jan 2023 13:58:32 +0100
From: Lorenzo Bianconi <lorenzo@...nel.org>
To: bpf@...r.kernel.org
Cc: netdev@...r.kernel.org, ast@...nel.org, daniel@...earbox.net,
andrii@...nel.org, davem@...emloft.net, kuba@...nel.org,
hawk@...nel.org, pabeni@...hat.com, edumazet@...gle.com,
toke@...hat.com, memxor@...il.com, alardam@...il.com,
saeedm@...dia.com, anthony.l.nguyen@...el.com, gospo@...adcom.com,
vladimir.oltean@....com, nbd@....name, john@...ozen.org,
leon@...nel.org, simon.horman@...igine.com, aelior@...vell.com,
christophe.jaillet@...adoo.fr, ecree.xilinx@...il.com,
mst@...hat.com, bjorn@...nel.org, magnus.karlsson@...el.com,
maciej.fijalkowski@...el.com, intel-wired-lan@...ts.osuosl.org,
lorenzo.bianconi@...hat.com, martin.lau@...ux.dev
Subject: [PATCH v3 bpf-next 7/8] selftests/bpf: add test for bpf_xdp_query xdp-features support
Introduce a self-test to verify libbpf bpf_xdp_query capability to dump
the xdp-features supported by the device (lo and veth in this case).
Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>
---
.../bpf/prog_tests/xdp_do_redirect.c | 27 ++++++++++++++++++-
.../selftests/bpf/prog_tests/xdp_info.c | 8 ++++++
2 files changed, 34 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_do_redirect.c b/tools/testing/selftests/bpf/prog_tests/xdp_do_redirect.c
index a50971c6cf4a..e15fb3f0306c 100644
--- a/tools/testing/selftests/bpf/prog_tests/xdp_do_redirect.c
+++ b/tools/testing/selftests/bpf/prog_tests/xdp_do_redirect.c
@@ -4,10 +4,12 @@
#include <net/if.h>
#include <linux/if_ether.h>
#include <linux/if_packet.h>
+#include <linux/if_link.h>
#include <linux/ipv6.h>
#include <linux/in6.h>
#include <linux/udp.h>
#include <bpf/bpf_endian.h>
+#include <uapi/linux/netdev.h>
#include "test_xdp_do_redirect.skel.h"
#define SYS(fmt, ...) \
@@ -92,7 +94,7 @@ void test_xdp_do_redirect(void)
struct test_xdp_do_redirect *skel = NULL;
struct nstoken *nstoken = NULL;
struct bpf_link *link;
-
+ LIBBPF_OPTS(bpf_xdp_query_opts, query_opts);
struct xdp_md ctx_in = { .data = sizeof(__u32),
.data_end = sizeof(data) };
DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts,
@@ -153,6 +155,29 @@ void test_xdp_do_redirect(void)
!ASSERT_NEQ(ifindex_dst, 0, "ifindex_dst"))
goto out;
+ /* Check xdp features supported by veth driver */
+ err = bpf_xdp_query(ifindex_src, XDP_FLAGS_DRV_MODE, &query_opts);
+ if (!ASSERT_OK(err, "veth_src bpf_xdp_query"))
+ goto out;
+
+ if (!ASSERT_EQ(query_opts.fflags,
+ NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT |
+ NETDEV_XDP_ACT_NDO_XMIT | NETDEV_XDP_ACT_RX_SG |
+ NETDEV_XDP_ACT_NDO_XMIT_SG,
+ "veth_src query_opts.fflags"))
+ goto out;
+
+ err = bpf_xdp_query(ifindex_dst, XDP_FLAGS_DRV_MODE, &query_opts);
+ if (!ASSERT_OK(err, "veth_dst bpf_xdp_query"))
+ goto out;
+
+ if (!ASSERT_EQ(query_opts.fflags,
+ NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT |
+ NETDEV_XDP_ACT_NDO_XMIT | NETDEV_XDP_ACT_RX_SG |
+ NETDEV_XDP_ACT_NDO_XMIT_SG,
+ "veth_dst query_opts.fflags"))
+ goto out;
+
memcpy(skel->rodata->expect_dst, &pkt_udp.eth.h_dest, ETH_ALEN);
skel->rodata->ifindex_out = ifindex_src; /* redirect back to the same iface */
skel->rodata->ifindex_in = ifindex_src;
diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_info.c b/tools/testing/selftests/bpf/prog_tests/xdp_info.c
index cd3aa340e65e..8397468a9e74 100644
--- a/tools/testing/selftests/bpf/prog_tests/xdp_info.c
+++ b/tools/testing/selftests/bpf/prog_tests/xdp_info.c
@@ -8,6 +8,7 @@ void serial_test_xdp_info(void)
{
__u32 len = sizeof(struct bpf_prog_info), duration = 0, prog_id;
const char *file = "./xdp_dummy.bpf.o";
+ LIBBPF_OPTS(bpf_xdp_query_opts, opts);
struct bpf_prog_info info = {};
struct bpf_object *obj;
int err, prog_fd;
@@ -61,6 +62,13 @@ void serial_test_xdp_info(void)
if (CHECK(prog_id, "prog_id_drv", "unexpected prog_id=%u\n", prog_id))
goto out;
+ /* Check xdp features supported by lo device */
+ opts.fflags = ~0;
+ err = bpf_xdp_query(IFINDEX_LO, XDP_FLAGS_DRV_MODE, &opts);
+ if (!ASSERT_OK(err, "bpf_xdp_query"))
+ goto out;
+
+ ASSERT_EQ(opts.fflags, 0, "opts.fflags");
out:
bpf_xdp_detach(IFINDEX_LO, 0, NULL);
out_close:
--
2.39.1
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