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![Toke Høiland-Jørgensen](/assets/img/avatar_default.png)
Fix all files in samples/bpf to include libbpf header files with the bpf/
prefix, to be consistent with external users of the library. Also ensure
that all includes of exported libbpf header files (those that are exported
on 'make install' of the library) use bracketed includes instead of quoted.
To make sure no new files are introduced that doesn't include the bpf/
prefix in its include, remove tools/lib/bpf from the include path entirely,
and use tools/lib instead.
Fixes: 6910d7d386
("selftests/bpf: Ensure bpf_helper_defs.h are taken from selftests dir")
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/157952560911.1683545.8795966751309534150.stgit@toke.dk
167 lines
3.4 KiB
C
167 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright (c) 2016 PLUMgrid
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*/
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#include <linux/bpf.h>
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#include <linux/if_link.h>
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#include <assert.h>
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#include <errno.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <libgen.h>
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#include <sys/resource.h>
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#include <net/if.h>
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#include "bpf_util.h"
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#include <bpf/bpf.h>
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#include <bpf/libbpf.h>
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static int ifindex;
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static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
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static __u32 prog_id;
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static void int_exit(int sig)
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{
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__u32 curr_prog_id = 0;
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if (bpf_get_link_xdp_id(ifindex, &curr_prog_id, xdp_flags)) {
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printf("bpf_get_link_xdp_id failed\n");
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exit(1);
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}
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if (prog_id == curr_prog_id)
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bpf_set_link_xdp_fd(ifindex, -1, xdp_flags);
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else if (!curr_prog_id)
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printf("couldn't find a prog id on a given interface\n");
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else
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printf("program on interface changed, not removing\n");
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exit(0);
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}
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/* simple per-protocol drop counter
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*/
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static void poll_stats(int map_fd, int interval)
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{
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unsigned int nr_cpus = bpf_num_possible_cpus();
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__u64 values[nr_cpus], prev[UINT8_MAX] = { 0 };
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int i;
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while (1) {
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__u32 key = UINT32_MAX;
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sleep(interval);
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while (bpf_map_get_next_key(map_fd, &key, &key) != -1) {
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__u64 sum = 0;
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assert(bpf_map_lookup_elem(map_fd, &key, values) == 0);
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for (i = 0; i < nr_cpus; i++)
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sum += values[i];
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if (sum > prev[key])
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printf("proto %u: %10llu pkt/s\n",
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key, (sum - prev[key]) / interval);
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prev[key] = sum;
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}
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}
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}
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static void usage(const char *prog)
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{
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fprintf(stderr,
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"usage: %s [OPTS] IFACE\n\n"
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"OPTS:\n"
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" -S use skb-mode\n"
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" -N enforce native mode\n"
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" -F force loading prog\n",
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prog);
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}
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int main(int argc, char **argv)
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{
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struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
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struct bpf_prog_load_attr prog_load_attr = {
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.prog_type = BPF_PROG_TYPE_XDP,
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};
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struct bpf_prog_info info = {};
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__u32 info_len = sizeof(info);
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const char *optstr = "FSN";
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int prog_fd, map_fd, opt;
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struct bpf_object *obj;
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struct bpf_map *map;
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char filename[256];
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int err;
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while ((opt = getopt(argc, argv, optstr)) != -1) {
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switch (opt) {
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case 'S':
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xdp_flags |= XDP_FLAGS_SKB_MODE;
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break;
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case 'N':
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/* default, set below */
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break;
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case 'F':
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xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST;
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break;
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default:
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usage(basename(argv[0]));
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return 1;
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}
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}
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if (!(xdp_flags & XDP_FLAGS_SKB_MODE))
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xdp_flags |= XDP_FLAGS_DRV_MODE;
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if (optind == argc) {
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usage(basename(argv[0]));
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return 1;
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}
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if (setrlimit(RLIMIT_MEMLOCK, &r)) {
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perror("setrlimit(RLIMIT_MEMLOCK)");
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return 1;
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}
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ifindex = if_nametoindex(argv[optind]);
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if (!ifindex) {
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perror("if_nametoindex");
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return 1;
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}
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snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
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prog_load_attr.file = filename;
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if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd))
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return 1;
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map = bpf_map__next(NULL, obj);
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if (!map) {
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printf("finding a map in obj file failed\n");
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return 1;
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}
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map_fd = bpf_map__fd(map);
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if (!prog_fd) {
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printf("bpf_prog_load_xattr: %s\n", strerror(errno));
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return 1;
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}
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signal(SIGINT, int_exit);
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signal(SIGTERM, int_exit);
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if (bpf_set_link_xdp_fd(ifindex, prog_fd, xdp_flags) < 0) {
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printf("link set xdp fd failed\n");
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return 1;
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}
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err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len);
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if (err) {
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printf("can't get prog info - %s\n", strerror(errno));
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return err;
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}
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prog_id = info.id;
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poll_stats(map_fd, 2);
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return 0;
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}
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