diff options
Diffstat (limited to 'samples/bpf/xdp1_user.c')
-rw-r--r-- | samples/bpf/xdp1_user.c | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/samples/bpf/xdp1_user.c b/samples/bpf/xdp1_user.c deleted file mode 100644 index c447ad9e3a1d..000000000000 --- a/samples/bpf/xdp1_user.c +++ /dev/null @@ -1,167 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* Copyright (c) 2016 PLUMgrid - */ -#include <linux/bpf.h> -#include <linux/if_link.h> -#include <assert.h> -#include <errno.h> -#include <signal.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <libgen.h> -#include <sys/resource.h> -#include <net/if.h> - -#include "bpf_util.h" -#include <bpf/bpf.h> -#include <bpf/libbpf.h> - -static int ifindex; -static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST; -static __u32 prog_id; - -static void int_exit(int sig) -{ - __u32 curr_prog_id = 0; - - if (bpf_get_link_xdp_id(ifindex, &curr_prog_id, xdp_flags)) { - printf("bpf_get_link_xdp_id failed\n"); - exit(1); - } - if (prog_id == curr_prog_id) - bpf_set_link_xdp_fd(ifindex, -1, xdp_flags); - else if (!curr_prog_id) - printf("couldn't find a prog id on a given interface\n"); - else - printf("program on interface changed, not removing\n"); - exit(0); -} - -/* simple per-protocol drop counter - */ -static void poll_stats(int map_fd, int interval) -{ - unsigned int nr_cpus = bpf_num_possible_cpus(); - __u64 values[nr_cpus], prev[UINT8_MAX] = { 0 }; - int i; - - while (1) { - __u32 key = UINT32_MAX; - - sleep(interval); - - while (bpf_map_get_next_key(map_fd, &key, &key) != -1) { - __u64 sum = 0; - - assert(bpf_map_lookup_elem(map_fd, &key, values) == 0); - for (i = 0; i < nr_cpus; i++) - sum += values[i]; - if (sum > prev[key]) - printf("proto %u: %10llu pkt/s\n", - key, (sum - prev[key]) / interval); - prev[key] = sum; - } - } -} - -static void usage(const char *prog) -{ - fprintf(stderr, - "usage: %s [OPTS] IFACE\n\n" - "OPTS:\n" - " -S use skb-mode\n" - " -N enforce native mode\n" - " -F force loading prog\n", - prog); -} - -int main(int argc, char **argv) -{ - struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; - struct bpf_prog_load_attr prog_load_attr = { - .prog_type = BPF_PROG_TYPE_XDP, - }; - struct bpf_prog_info info = {}; - __u32 info_len = sizeof(info); - const char *optstr = "FSN"; - int prog_fd, map_fd, opt; - struct bpf_object *obj; - struct bpf_map *map; - char filename[256]; - int err; - - while ((opt = getopt(argc, argv, optstr)) != -1) { - switch (opt) { - case 'S': - xdp_flags |= XDP_FLAGS_SKB_MODE; - break; - case 'N': - /* default, set below */ - break; - case 'F': - xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST; - break; - default: - usage(basename(argv[0])); - return 1; - } - } - - if (!(xdp_flags & XDP_FLAGS_SKB_MODE)) - xdp_flags |= XDP_FLAGS_DRV_MODE; - - if (optind == argc) { - usage(basename(argv[0])); - return 1; - } - - if (setrlimit(RLIMIT_MEMLOCK, &r)) { - perror("setrlimit(RLIMIT_MEMLOCK)"); - return 1; - } - - ifindex = if_nametoindex(argv[optind]); - if (!ifindex) { - perror("if_nametoindex"); - return 1; - } - - snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); - prog_load_attr.file = filename; - - if (bpf_prog_load_xattr(&prog_load_attr, &obj, &prog_fd)) - return 1; - - map = bpf_map__next(NULL, obj); - if (!map) { - printf("finding a map in obj file failed\n"); - return 1; - } - map_fd = bpf_map__fd(map); - - if (!prog_fd) { - printf("bpf_prog_load_xattr: %s\n", strerror(errno)); - return 1; - } - - signal(SIGINT, int_exit); - signal(SIGTERM, int_exit); - - if (bpf_set_link_xdp_fd(ifindex, prog_fd, xdp_flags) < 0) { - printf("link set xdp fd failed\n"); - return 1; - } - - err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); - if (err) { - printf("can't get prog info - %s\n", strerror(errno)); - return err; - } - prog_id = info.id; - - poll_stats(map_fd, 2); - - return 0; -} |