ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/samples/bpf/xdp_sample_pkts_user.c b/marvell/linux/samples/bpf/xdp_sample_pkts_user.c
new file mode 100644
index 0000000..3002714
--- /dev/null
+++ b/marvell/linux/samples/bpf/xdp_sample_pkts_user.c
@@ -0,0 +1,197 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <linux/perf_event.h>
+#include <linux/bpf.h>
+#include <net/if.h>
+#include <errno.h>
+#include <assert.h>
+#include <sys/sysinfo.h>
+#include <sys/ioctl.h>
+#include <signal.h>
+#include <libbpf.h>
+#include <bpf/bpf.h>
+#include <sys/resource.h>
+#include <libgen.h>
+#include <linux/if_link.h>
+
+#include "perf-sys.h"
+
+#define MAX_CPUS 128
+static int if_idx;
+static char *if_name;
+static __u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
+static __u32 prog_id;
+static struct perf_buffer *pb = NULL;
+
+static int do_attach(int idx, int fd, const char *name)
+{
+ struct bpf_prog_info info = {};
+ __u32 info_len = sizeof(info);
+ int err;
+
+ err = bpf_set_link_xdp_fd(idx, fd, xdp_flags);
+ if (err < 0) {
+ printf("ERROR: failed to attach program to %s\n", name);
+ return err;
+ }
+
+ err = bpf_obj_get_info_by_fd(fd, &info, &info_len);
+ if (err) {
+ printf("can't get prog info - %s\n", strerror(errno));
+ return err;
+ }
+ prog_id = info.id;
+
+ return err;
+}
+
+static int do_detach(int idx, const char *name)
+{
+ __u32 curr_prog_id = 0;
+ int err = 0;
+
+ err = bpf_get_link_xdp_id(idx, &curr_prog_id, 0);
+ if (err) {
+ printf("bpf_get_link_xdp_id failed\n");
+ return err;
+ }
+ if (prog_id == curr_prog_id) {
+ err = bpf_set_link_xdp_fd(idx, -1, 0);
+ if (err < 0)
+ printf("ERROR: failed to detach prog from %s\n", name);
+ } else if (!curr_prog_id) {
+ printf("couldn't find a prog id on a %s\n", name);
+ } else {
+ printf("program on interface changed, not removing\n");
+ }
+
+ return err;
+}
+
+#define SAMPLE_SIZE 64
+
+static void print_bpf_output(void *ctx, int cpu, void *data, __u32 size)
+{
+ struct {
+ __u16 cookie;
+ __u16 pkt_len;
+ __u8 pkt_data[SAMPLE_SIZE];
+ } __packed *e = data;
+ int i;
+
+ if (e->cookie != 0xdead) {
+ printf("BUG cookie %x sized %d\n", e->cookie, size);
+ return;
+ }
+
+ printf("Pkt len: %-5d bytes. Ethernet hdr: ", e->pkt_len);
+ for (i = 0; i < 14 && i < e->pkt_len; i++)
+ printf("%02x ", e->pkt_data[i]);
+ printf("\n");
+}
+
+static void sig_handler(int signo)
+{
+ do_detach(if_idx, if_name);
+ perf_buffer__free(pb);
+ exit(0);
+}
+
+static void usage(const char *prog)
+{
+ fprintf(stderr,
+ "%s: %s [OPTS] <ifname|ifindex>\n\n"
+ "OPTS:\n"
+ " -F force loading prog\n",
+ __func__, 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 perf_buffer_opts pb_opts = {};
+ const char *optstr = "F";
+ int prog_fd, map_fd, opt;
+ struct bpf_object *obj;
+ struct bpf_map *map;
+ char filename[256];
+ int ret, err;
+
+ while ((opt = getopt(argc, argv, optstr)) != -1) {
+ switch (opt) {
+ case 'F':
+ xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST;
+ break;
+ default:
+ usage(basename(argv[0]));
+ return 1;
+ }
+ }
+
+ if (optind == argc) {
+ usage(basename(argv[0]));
+ return 1;
+ }
+
+ if (setrlimit(RLIMIT_MEMLOCK, &r)) {
+ perror("setrlimit(RLIMIT_MEMLOCK)");
+ 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;
+
+ if (!prog_fd) {
+ printf("load_bpf_file: %s\n", strerror(errno));
+ 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_idx = if_nametoindex(argv[optind]);
+ if (!if_idx)
+ if_idx = strtoul(argv[optind], NULL, 0);
+
+ if (!if_idx) {
+ fprintf(stderr, "Invalid ifname\n");
+ return 1;
+ }
+ if_name = argv[optind];
+ err = do_attach(if_idx, prog_fd, if_name);
+ if (err)
+ return err;
+
+ if (signal(SIGINT, sig_handler) ||
+ signal(SIGHUP, sig_handler) ||
+ signal(SIGTERM, sig_handler)) {
+ perror("signal");
+ return 1;
+ }
+
+ pb_opts.sample_cb = print_bpf_output;
+ pb = perf_buffer__new(map_fd, 8, &pb_opts);
+ err = libbpf_get_error(pb);
+ if (err) {
+ perror("perf_buffer setup failed");
+ return 1;
+ }
+
+ while ((ret = perf_buffer__poll(pb, 1000)) >= 0) {
+ }
+
+ kill(0, SIGINT);
+ return ret;
+}