cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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xdp_info.c (1938B)

      1// SPDX-License-Identifier: GPL-2.0
      2#include <linux/if_link.h>
      3#include <test_progs.h>
      4
      5#define IFINDEX_LO 1
      6
      7void serial_test_xdp_info(void)
      8{
      9	__u32 len = sizeof(struct bpf_prog_info), duration = 0, prog_id;
     10	const char *file = "./xdp_dummy.o";
     11	struct bpf_prog_info info = {};
     12	struct bpf_object *obj;
     13	int err, prog_fd;
     14
     15	/* Get prog_id for XDP_ATTACHED_NONE mode */
     16
     17	err = bpf_xdp_query_id(IFINDEX_LO, 0, &prog_id);
     18	if (CHECK(err, "get_xdp_none", "errno=%d\n", errno))
     19		return;
     20	if (CHECK(prog_id, "prog_id_none", "unexpected prog_id=%u\n", prog_id))
     21		return;
     22
     23	err = bpf_xdp_query_id(IFINDEX_LO, XDP_FLAGS_SKB_MODE, &prog_id);
     24	if (CHECK(err, "get_xdp_none_skb", "errno=%d\n", errno))
     25		return;
     26	if (CHECK(prog_id, "prog_id_none_skb", "unexpected prog_id=%u\n",
     27		  prog_id))
     28		return;
     29
     30	/* Setup prog */
     31
     32	err = bpf_prog_test_load(file, BPF_PROG_TYPE_XDP, &obj, &prog_fd);
     33	if (CHECK_FAIL(err))
     34		return;
     35
     36	err = bpf_obj_get_info_by_fd(prog_fd, &info, &len);
     37	if (CHECK(err, "get_prog_info", "errno=%d\n", errno))
     38		goto out_close;
     39
     40	err = bpf_xdp_attach(IFINDEX_LO, prog_fd, XDP_FLAGS_SKB_MODE, NULL);
     41	if (CHECK(err, "set_xdp_skb", "errno=%d\n", errno))
     42		goto out_close;
     43
     44	/* Get prog_id for single prog mode */
     45
     46	err = bpf_xdp_query_id(IFINDEX_LO, 0, &prog_id);
     47	if (CHECK(err, "get_xdp", "errno=%d\n", errno))
     48		goto out;
     49	if (CHECK(prog_id != info.id, "prog_id", "prog_id not available\n"))
     50		goto out;
     51
     52	err = bpf_xdp_query_id(IFINDEX_LO, XDP_FLAGS_SKB_MODE, &prog_id);
     53	if (CHECK(err, "get_xdp_skb", "errno=%d\n", errno))
     54		goto out;
     55	if (CHECK(prog_id != info.id, "prog_id_skb", "prog_id not available\n"))
     56		goto out;
     57
     58	err = bpf_xdp_query_id(IFINDEX_LO, XDP_FLAGS_DRV_MODE, &prog_id);
     59	if (CHECK(err, "get_xdp_drv", "errno=%d\n", errno))
     60		goto out;
     61	if (CHECK(prog_id, "prog_id_drv", "unexpected prog_id=%u\n", prog_id))
     62		goto out;
     63
     64out:
     65	bpf_xdp_detach(IFINDEX_LO, 0, NULL);
     66out_close:
     67	bpf_object__close(obj);
     68}