tools/testing/selftests/bpf/prog_tests/sock_destroy.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/prog_tests/sock_destroy.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/prog_tests/sock_destroy.c
Extension
.c
Size
5603 bytes
Lines
222
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include <bpf/bpf_endian.h>

#include "sock_destroy_prog.skel.h"
#include "sock_destroy_prog_fail.skel.h"
#include "network_helpers.h"

#define TEST_NS "sock_destroy_netns"

static void start_iter_sockets(struct bpf_program *prog)
{
	struct bpf_link *link;
	char buf[50] = {};
	int iter_fd, len;

	link = bpf_program__attach_iter(prog, NULL);
	if (!ASSERT_OK_PTR(link, "attach_iter"))
		return;

	iter_fd = bpf_iter_create(bpf_link__fd(link));
	if (!ASSERT_GE(iter_fd, 0, "create_iter"))
		goto free_link;

	while ((len = read(iter_fd, buf, sizeof(buf))) > 0)
		;
	ASSERT_GE(len, 0, "read");

	close(iter_fd);

free_link:
	bpf_link__destroy(link);
}

static void test_tcp_client(struct sock_destroy_prog *skel)
{
	int serv = -1, clien = -1, accept_serv = -1, n;

	serv = start_server(AF_INET6, SOCK_STREAM, NULL, 0, 0);
	if (!ASSERT_GE(serv, 0, "start_server"))
		goto cleanup;

	clien = connect_to_fd(serv, 0);
	if (!ASSERT_GE(clien, 0, "connect_to_fd"))
		goto cleanup;

	accept_serv = accept(serv, NULL, NULL);
	if (!ASSERT_GE(accept_serv, 0, "serv accept"))
		goto cleanup;

	n = send(clien, "t", 1, 0);
	if (!ASSERT_EQ(n, 1, "client send"))
		goto cleanup;

	/* Run iterator program that destroys connected client sockets. */
	start_iter_sockets(skel->progs.iter_tcp6_client);

	n = send(clien, "t", 1, 0);
	if (!ASSERT_LT(n, 0, "client_send on destroyed socket"))
		goto cleanup;
	ASSERT_EQ(errno, ECONNABORTED, "error code on destroyed socket");

cleanup:
	if (clien != -1)
		close(clien);
	if (accept_serv != -1)
		close(accept_serv);
	if (serv != -1)
		close(serv);
}

static void test_tcp_server(struct sock_destroy_prog *skel)
{
	int serv = -1, clien = -1, accept_serv = -1, n, serv_port;

	serv = start_server(AF_INET6, SOCK_STREAM, NULL, 0, 0);
	if (!ASSERT_GE(serv, 0, "start_server"))
		goto cleanup;
	serv_port = get_socket_local_port(serv);
	if (!ASSERT_GE(serv_port, 0, "get_sock_local_port"))
		goto cleanup;
	skel->bss->serv_port = (__be16) serv_port;

	clien = connect_to_fd(serv, 0);
	if (!ASSERT_GE(clien, 0, "connect_to_fd"))
		goto cleanup;

	accept_serv = accept(serv, NULL, NULL);
	if (!ASSERT_GE(accept_serv, 0, "serv accept"))
		goto cleanup;

Annotation

Implementation Notes