samples/bpf: remove obsolete tracing related tests

The samples/bpf has become outdated and often does not follow up with
the latest. This commit removes obsolete tracing-related tests.

Specifically, 'test_overhead' is duplicate with selftests (and bench),
and 'test_override_return', 'test_probe_write_user' tests are obsolete
since they have been replaced by kprobe_multi_override and probe_user
from selftests respectively.

The following files are removed:
- test_overhead: tests the overhead of BPF programs with task_rename,
  now covered by selftests and benchmark tests (rename-*). [1]

- test_override_return: tests the return override functionality, now
  handled by kprobe_multi_override in selftests.

- test_probe_write_user: tests the probe_write_user functionality,
  now replaced by the probe_user test in selftests.

This cleanup will help to streamline the testing framework by removing
redundant tests.

[1]: https://patchwork.kernel.org/cover/13759916

Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Link: https://lore.kernel.org/r/20241011044847.51584-5-danieltimlee@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 0 insertions, 108 deletions

diff --git a/samples/bpf/test_probe_write_user_user.c b/samples/bpf/test_probe_write_user_user.c
deleted file mode 100644
index 2a539aec4116..000000000000
--- a/samples/bpf/test_probe_write_user_user.c
+++ /dev/null
@@ -1,108 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <stdio.h>
-#include <assert.h>
-#include <unistd.h>
-#include <bpf/bpf.h>
-#include <bpf/libbpf.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-
-int main(int ac, char **argv)
-{
-	struct sockaddr_in *serv_addr_in, *mapped_addr_in, *tmp_addr_in;
-	struct sockaddr serv_addr, mapped_addr, tmp_addr;
-	int serverfd, serverconnfd, clientfd, map_fd;
-	struct bpf_link *link = NULL;
-	struct bpf_program *prog;
-	struct bpf_object *obj;
-	socklen_t sockaddr_len;
-	char filename[256];
-	char *ip;
-
-	serv_addr_in = (struct sockaddr_in *)&serv_addr;
-	mapped_addr_in = (struct sockaddr_in *)&mapped_addr;
-	tmp_addr_in = (struct sockaddr_in *)&tmp_addr;
-
-	snprintf(filename, sizeof(filename), "%s.bpf.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 0;
-	}
-
-	prog = bpf_object__find_program_by_name(obj, "bpf_prog1");
-	if (libbpf_get_error(prog)) {
-		fprintf(stderr, "ERROR: finding a prog in obj file failed\n");
-		goto cleanup;
-	}
-
-	/* load BPF program */
-	if (bpf_object__load(obj)) {
-		fprintf(stderr, "ERROR: loading BPF object file failed\n");
-		goto cleanup;
-	}
-
-	map_fd = bpf_object__find_map_fd_by_name(obj, "dnat_map");
-	if (map_fd < 0) {
-		fprintf(stderr, "ERROR: finding a map in obj file failed\n");
-		goto cleanup;
-	}
-
-	link = bpf_program__attach(prog);
-	if (libbpf_get_error(link)) {
-		fprintf(stderr, "ERROR: bpf_program__attach failed\n");
-		link = NULL;
-		goto cleanup;
-	}
-
-	assert((serverfd = socket(AF_INET, SOCK_STREAM, 0)) > 0);
-	assert((clientfd = socket(AF_INET, SOCK_STREAM, 0)) > 0);
-
-	/* Bind server to ephemeral port on lo */
-	memset(&serv_addr, 0, sizeof(serv_addr));
-	serv_addr_in->sin_family = AF_INET;
-	serv_addr_in->sin_port = 0;
-	serv_addr_in->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
-
-	assert(bind(serverfd, &serv_addr, sizeof(serv_addr)) == 0);
-
-	sockaddr_len = sizeof(serv_addr);
-	assert(getsockname(serverfd, &serv_addr, &sockaddr_len) == 0);
-	ip = inet_ntoa(serv_addr_in->sin_addr);
-	printf("Server bound to: %s:%d\n", ip, ntohs(serv_addr_in->sin_port));
-
-	memset(&mapped_addr, 0, sizeof(mapped_addr));
-	mapped_addr_in->sin_family = AF_INET;
-	mapped_addr_in->sin_port = htons(5555);
-	mapped_addr_in->sin_addr.s_addr = inet_addr("255.255.255.255");
-
-	assert(!bpf_map_update_elem(map_fd, &mapped_addr, &serv_addr, BPF_ANY));
-
-	assert(listen(serverfd, 5) == 0);
-
-	ip = inet_ntoa(mapped_addr_in->sin_addr);
-	printf("Client connecting to: %s:%d\n",
-	       ip, ntohs(mapped_addr_in->sin_port));
-	assert(connect(clientfd, &mapped_addr, sizeof(mapped_addr)) == 0);
-
-	sockaddr_len = sizeof(tmp_addr);
-	ip = inet_ntoa(tmp_addr_in->sin_addr);
-	assert((serverconnfd = accept(serverfd, &tmp_addr, &sockaddr_len)) > 0);
-	printf("Server received connection from: %s:%d\n",
-	       ip, ntohs(tmp_addr_in->sin_port));
-
-	sockaddr_len = sizeof(tmp_addr);
-	assert(getpeername(clientfd, &tmp_addr, &sockaddr_len) == 0);
-	ip = inet_ntoa(tmp_addr_in->sin_addr);
-	printf("Client's peer address: %s:%d\n",
-	       ip, ntohs(tmp_addr_in->sin_port));
-
-	/* Is the server's getsockname = the socket getpeername */
-	assert(memcmp(&serv_addr, &tmp_addr, sizeof(struct sockaddr_in)) == 0);
-
-cleanup:
-	bpf_link__destroy(link);
-	bpf_object__close(obj);
-	return 0;
-}