1// SPDX-License-Identifier: GPL-2.0
  2#include <uapi/linux/bpf.h>
  3#include <linux/if_link.h>
  4#include <test_progs.h>
  5
  6#include "test_xdp_with_cpumap_frags_helpers.skel.h"
  7#include "test_xdp_with_cpumap_helpers.skel.h"
  8
  9#define IFINDEX_LO	1
 10
 11static void test_xdp_with_cpumap_helpers(void)
 12{
 13	struct test_xdp_with_cpumap_helpers *skel;
 14	struct bpf_prog_info info = {};
 15	__u32 len = sizeof(info);
 16	struct bpf_cpumap_val val = {
 17		.qsize = 192,
 18	};
 19	int err, prog_fd, map_fd;
 20	__u32 idx = 0;
 21
 22	skel = test_xdp_with_cpumap_helpers__open_and_load();
 23	if (!ASSERT_OK_PTR(skel, "test_xdp_with_cpumap_helpers__open_and_load"))
 24		return;
 25
 26	prog_fd = bpf_program__fd(skel->progs.xdp_redir_prog);
 27	err = bpf_xdp_attach(IFINDEX_LO, prog_fd, XDP_FLAGS_SKB_MODE, NULL);
 28	if (!ASSERT_OK(err, "Generic attach of program with 8-byte CPUMAP"))
 29		goto out_close;
 30
 31	err = bpf_xdp_detach(IFINDEX_LO, XDP_FLAGS_SKB_MODE, NULL);
 32	ASSERT_OK(err, "XDP program detach");
 33
 34	prog_fd = bpf_program__fd(skel->progs.xdp_dummy_cm);
 35	map_fd = bpf_map__fd(skel->maps.cpu_map);
 36	err = bpf_prog_get_info_by_fd(prog_fd, &info, &len);
 37	if (!ASSERT_OK(err, "bpf_prog_get_info_by_fd"))
 38		goto out_close;
 39
 40	val.bpf_prog.fd = prog_fd;
 41	err = bpf_map_update_elem(map_fd, &idx, &val, 0);
 42	ASSERT_OK(err, "Add program to cpumap entry");
 43
 44	err = bpf_map_lookup_elem(map_fd, &idx, &val);
 45	ASSERT_OK(err, "Read cpumap entry");
 46	ASSERT_EQ(info.id, val.bpf_prog.id, "Match program id to cpumap entry prog_id");
 47
 48	/* can not attach BPF_XDP_CPUMAP program to a device */
 49	err = bpf_xdp_attach(IFINDEX_LO, prog_fd, XDP_FLAGS_SKB_MODE, NULL);
 50	if (!ASSERT_NEQ(err, 0, "Attach of BPF_XDP_CPUMAP program"))
 51		bpf_xdp_detach(IFINDEX_LO, XDP_FLAGS_SKB_MODE, NULL);
 52
 53	val.qsize = 192;
 54	val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_prog);
 55	err = bpf_map_update_elem(map_fd, &idx, &val, 0);
 56	ASSERT_NEQ(err, 0, "Add non-BPF_XDP_CPUMAP program to cpumap entry");
 57
 58	/* Try to attach BPF_XDP program with frags to cpumap when we have
 59	 * already loaded a BPF_XDP program on the map
 60	 */
 61	idx = 1;
 62	val.qsize = 192;
 63	val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_cm_frags);
 64	err = bpf_map_update_elem(map_fd, &idx, &val, 0);
 65	ASSERT_NEQ(err, 0, "Add BPF_XDP program with frags to cpumap entry");
 66
 67out_close:
 68	test_xdp_with_cpumap_helpers__destroy(skel);
 69}
 70
 71static void test_xdp_with_cpumap_frags_helpers(void)
 72{
 73	struct test_xdp_with_cpumap_frags_helpers *skel;
 74	struct bpf_prog_info info = {};
 75	__u32 len = sizeof(info);
 76	struct bpf_cpumap_val val = {
 77		.qsize = 192,
 78	};
 79	int err, frags_prog_fd, map_fd;
 80	__u32 idx = 0;
 81
 82	skel = test_xdp_with_cpumap_frags_helpers__open_and_load();
 83	if (!ASSERT_OK_PTR(skel, "test_xdp_with_cpumap_helpers__open_and_load"))
 84		return;
 85
 86	frags_prog_fd = bpf_program__fd(skel->progs.xdp_dummy_cm_frags);
 87	map_fd = bpf_map__fd(skel->maps.cpu_map);
 88	err = bpf_prog_get_info_by_fd(frags_prog_fd, &info, &len);
 89	if (!ASSERT_OK(err, "bpf_prog_get_info_by_fd"))
 90		goto out_close;
 91
 92	val.bpf_prog.fd = frags_prog_fd;
 93	err = bpf_map_update_elem(map_fd, &idx, &val, 0);
 94	ASSERT_OK(err, "Add program to cpumap entry");
 95
 96	err = bpf_map_lookup_elem(map_fd, &idx, &val);
 97	ASSERT_OK(err, "Read cpumap entry");
 98	ASSERT_EQ(info.id, val.bpf_prog.id,
 99		  "Match program id to cpumap entry prog_id");
100
101	/* Try to attach BPF_XDP program to cpumap when we have
102	 * already loaded a BPF_XDP program with frags on the map
103	 */
104	idx = 1;
105	val.qsize = 192;
106	val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_cm);
107	err = bpf_map_update_elem(map_fd, &idx, &val, 0);
108	ASSERT_NEQ(err, 0, "Add BPF_XDP program to cpumap entry");
109
110out_close:
111	test_xdp_with_cpumap_frags_helpers__destroy(skel);
112}
113
114void serial_test_xdp_cpumap_attach(void)
115{
116	if (test__start_subtest("CPUMAP with programs in entries"))
117		test_xdp_with_cpumap_helpers();
118
119	if (test__start_subtest("CPUMAP with frags programs in entries"))
120		test_xdp_with_cpumap_frags_helpers();
121}