mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-31 16:38:12 +00:00
eb203f4b89
Add xdp_info selftest that makes sure that bpf_get_link_xdp_id returns valid prog_id for different input modes: * w/ and w/o flags when no program is attached; * w/ and w/o flags when one program is attached. Signed-off-by: Andrey Ignatov <rdna@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/2a9a6d1ce33b91ccc1aa3de6dba2d309f2062811.1586236080.git.rdna@fb.com
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/if_link.h>
|
|
#include <test_progs.h>
|
|
|
|
#define IFINDEX_LO 1
|
|
|
|
void test_xdp_info(void)
|
|
{
|
|
__u32 len = sizeof(struct bpf_prog_info), duration = 0, prog_id;
|
|
const char *file = "./xdp_dummy.o";
|
|
struct bpf_prog_info info = {};
|
|
struct bpf_object *obj;
|
|
int err, prog_fd;
|
|
|
|
/* Get prog_id for XDP_ATTACHED_NONE mode */
|
|
|
|
err = bpf_get_link_xdp_id(IFINDEX_LO, &prog_id, 0);
|
|
if (CHECK(err, "get_xdp_none", "errno=%d\n", errno))
|
|
return;
|
|
if (CHECK(prog_id, "prog_id_none", "unexpected prog_id=%u\n", prog_id))
|
|
return;
|
|
|
|
err = bpf_get_link_xdp_id(IFINDEX_LO, &prog_id, XDP_FLAGS_SKB_MODE);
|
|
if (CHECK(err, "get_xdp_none_skb", "errno=%d\n", errno))
|
|
return;
|
|
if (CHECK(prog_id, "prog_id_none_skb", "unexpected prog_id=%u\n",
|
|
prog_id))
|
|
return;
|
|
|
|
/* Setup prog */
|
|
|
|
err = bpf_prog_load(file, BPF_PROG_TYPE_XDP, &obj, &prog_fd);
|
|
if (CHECK_FAIL(err))
|
|
return;
|
|
|
|
err = bpf_obj_get_info_by_fd(prog_fd, &info, &len);
|
|
if (CHECK(err, "get_prog_info", "errno=%d\n", errno))
|
|
goto out_close;
|
|
|
|
err = bpf_set_link_xdp_fd(IFINDEX_LO, prog_fd, XDP_FLAGS_SKB_MODE);
|
|
if (CHECK(err, "set_xdp_skb", "errno=%d\n", errno))
|
|
goto out_close;
|
|
|
|
/* Get prog_id for single prog mode */
|
|
|
|
err = bpf_get_link_xdp_id(IFINDEX_LO, &prog_id, 0);
|
|
if (CHECK(err, "get_xdp", "errno=%d\n", errno))
|
|
goto out;
|
|
if (CHECK(prog_id != info.id, "prog_id", "prog_id not available\n"))
|
|
goto out;
|
|
|
|
err = bpf_get_link_xdp_id(IFINDEX_LO, &prog_id, XDP_FLAGS_SKB_MODE);
|
|
if (CHECK(err, "get_xdp_skb", "errno=%d\n", errno))
|
|
goto out;
|
|
if (CHECK(prog_id != info.id, "prog_id_skb", "prog_id not available\n"))
|
|
goto out;
|
|
|
|
err = bpf_get_link_xdp_id(IFINDEX_LO, &prog_id, XDP_FLAGS_DRV_MODE);
|
|
if (CHECK(err, "get_xdp_drv", "errno=%d\n", errno))
|
|
goto out;
|
|
if (CHECK(prog_id, "prog_id_drv", "unexpected prog_id=%u\n", prog_id))
|
|
goto out;
|
|
|
|
out:
|
|
bpf_set_link_xdp_fd(IFINDEX_LO, -1, 0);
|
|
out_close:
|
|
bpf_object__close(obj);
|
|
}
|