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Diffstat (limited to 'samples/bpf/ibumad_user.c')
-rw-r--r--samples/bpf/ibumad_user.c71
1 files changed, 54 insertions, 17 deletions
diff --git a/samples/bpf/ibumad_user.c b/samples/bpf/ibumad_user.c
index fa06eef31a84..d83d8102f489 100644
--- a/samples/bpf/ibumad_user.c
+++ b/samples/bpf/ibumad_user.c
@@ -23,10 +23,15 @@
#include <getopt.h>
#include <net/if.h>
-#include "bpf_load.h"
+#include <bpf/bpf.h>
#include "bpf_util.h"
#include <bpf/libbpf.h>
+static struct bpf_link *tp_links[3];
+static struct bpf_object *obj;
+static int map_fd[2];
+static int tp_cnt;
+
static void dump_counts(int fd)
{
__u32 key;
@@ -53,6 +58,11 @@ static void dump_all_counts(void)
static void dump_exit(int sig)
{
dump_all_counts();
+ /* Detach tracepoints */
+ while (tp_cnt)
+ bpf_link__destroy(tp_links[--tp_cnt]);
+
+ bpf_object__close(obj);
exit(0);
}
@@ -73,19 +83,11 @@ static void usage(char *cmd)
int main(int argc, char **argv)
{
+ struct bpf_program *prog;
unsigned long delay = 5;
+ char filename[256];
int longindex = 0;
- int opt;
- char bpf_file[256];
-
- /* Create the eBPF kernel code path name.
- * This follows the pattern of all of the other bpf samples
- */
- snprintf(bpf_file, sizeof(bpf_file), "%s_kern.o", argv[0]);
-
- /* Do one final dump when exiting */
- signal(SIGINT, dump_exit);
- signal(SIGTERM, dump_exit);
+ int opt, err = -1;
while ((opt = getopt_long(argc, argv, "hd:rSw",
long_options, &longindex)) != -1) {
@@ -107,16 +109,51 @@ int main(int argc, char **argv)
}
}
- if (load_bpf_file(bpf_file)) {
- fprintf(stderr, "ERROR: failed to load eBPF from file : %s\n",
- bpf_file);
- return 1;
+ /* Do one final dump when exiting */
+ signal(SIGINT, dump_exit);
+ signal(SIGTERM, dump_exit);
+
+ snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
+ obj = bpf_object__open_file(filename, NULL);
+ if (libbpf_get_error(obj)) {
+ fprintf(stderr, "ERROR: opening BPF object file failed\n");
+ return err;
+ }
+
+ /* load BPF program */
+ if (bpf_object__load(obj)) {
+ fprintf(stderr, "ERROR: loading BPF object file failed\n");
+ goto cleanup;
+ }
+
+ map_fd[0] = bpf_object__find_map_fd_by_name(obj, "read_count");
+ map_fd[1] = bpf_object__find_map_fd_by_name(obj, "write_count");
+ if (map_fd[0] < 0 || map_fd[1] < 0) {
+ fprintf(stderr, "ERROR: finding a map in obj file failed\n");
+ goto cleanup;
+ }
+
+ bpf_object__for_each_program(prog, obj) {
+ tp_links[tp_cnt] = bpf_program__attach(prog);
+ if (libbpf_get_error(tp_links[tp_cnt])) {
+ fprintf(stderr, "ERROR: bpf_program__attach failed\n");
+ tp_links[tp_cnt] = NULL;
+ goto cleanup;
+ }
+ tp_cnt++;
}
while (1) {
sleep(delay);
dump_all_counts();
}
+ err = 0;
+
+cleanup:
+ /* Detach tracepoints */
+ while (tp_cnt)
+ bpf_link__destroy(tp_links[--tp_cnt]);
- return 0;
+ bpf_object__close(obj);
+ return err;
}