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selftests/bpf: add test for bpf_xdp_query xdp-features support

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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).

Acked-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/534550318a2c883e174811683909544c63632f05.1675245258.git.lorenzo@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Lorenzo Bianconi 2023-02-01 11:24:23 +01:00 committed by Alexei Starovoitov
parent b9d460c924
commit 84050074e5
2 changed files with 34 additions and 1 deletions
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27
tools/testing/selftests/bpf/prog_tests/xdp_do_redirect.c
View File

@ -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, ...) \
@ -96,7 +98,7 @@ 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,
@ -157,6 +159,29 @@ 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.feature_flags,
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.feature_flags"))
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.feature_flags,
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.feature_flags"))
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;

8
tools/testing/selftests/bpf/prog_tests/xdp_info.c
View File

@ -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.feature_flags = ~0;
err = bpf_xdp_query(IFINDEX_LO, XDP_FLAGS_DRV_MODE, &opts);
if (!ASSERT_OK(err, "bpf_xdp_query"))
goto out;
ASSERT_EQ(opts.feature_flags, 0, "opts.feature_flags");
out:
bpf_xdp_detach(IFINDEX_LO, 0, NULL);
out_close: