change system file

hc

2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771

 kernel/samples/bpf/tracex7_user.c
..
..
@@ -1,17 +1,18 @@
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 #define _GNU_SOURCE
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 #include <stdio.h>
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-#include <linux/bpf.h>
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 #include <unistd.h>
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-#include <bpf/bpf.h>
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-#include "bpf_load.h"
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+#include <bpf/libbpf.h>
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 int main(int argc, char **argv)
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 {
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-	FILE *f;
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+	struct bpf_link *link = NULL;
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+	struct bpf_program *prog;
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+	struct bpf_object *obj;
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 	char filename[256];
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 	char command[256];
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-	int ret;
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+	int ret = 0;
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+	FILE *f;
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 	if (!argv[1]) {
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 		fprintf(stderr, "ERROR: Run with the btrfs device argument!\n");
..
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@@ -19,15 +20,37 @@
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 	}
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 	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
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+	obj = bpf_object__open_file(filename, NULL);
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+	if (libbpf_get_error(obj)) {
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+		fprintf(stderr, "ERROR: opening BPF object file failed\n");
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+		return 0;
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+	}
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-	if (load_bpf_file(filename)) {
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-		printf("%s", bpf_log_buf);
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-		return 1;
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+	prog = bpf_object__find_program_by_name(obj, "bpf_prog1");
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+	if (!prog) {
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+		fprintf(stderr, "ERROR: finding a prog in obj file failed\n");
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+		goto cleanup;
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+	}
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+
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+	/* load BPF program */
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+	if (bpf_object__load(obj)) {
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+		fprintf(stderr, "ERROR: loading BPF object file failed\n");
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+		goto cleanup;
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+	}
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+
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+	link = bpf_program__attach(prog);
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+	if (libbpf_get_error(link)) {
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+		fprintf(stderr, "ERROR: bpf_program__attach failed\n");
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+		link = NULL;
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+		goto cleanup;
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 	}
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 	snprintf(command, 256, "mount %s tmpmnt/", argv[1]);
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 	f = popen(command, "r");
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 	ret = pclose(f);
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+cleanup:
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+	bpf_link__destroy(link);
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+	bpf_object__close(obj);
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 	return ret ? 0 : 1;
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 }