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

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

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/prog_tests/cgrp_local_storage.c
Extension
.c
Size
9186 bytes
Lines
375
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

struct socket_cookie {
	__u64 cookie_key;
	__u64 cookie_value;
};

static bool is_cgroup1;
static int target_hid;

#define CGROUP_MODE_SET(skel)			\
{						\
	skel->bss->is_cgroup1 = is_cgroup1;	\
	skel->bss->target_hid = target_hid;	\
}

static void cgroup_mode_value_init(bool cgroup, int hid)
{
	is_cgroup1 = cgroup;
	target_hid = hid;
}

static void test_tp_btf(int cgroup_fd)
{
	struct cgrp_ls_tp_btf *skel;
	long val1 = 1, val2 = 0;
	int err;

	skel = cgrp_ls_tp_btf__open_and_load();
	if (!ASSERT_OK_PTR(skel, "skel_open_and_load"))
		return;

	CGROUP_MODE_SET(skel);

	/* populate a value in map_b */
	err = bpf_map_update_elem(bpf_map__fd(skel->maps.map_b), &cgroup_fd, &val1, BPF_ANY);
	if (!ASSERT_OK(err, "map_update_elem"))
		goto out;

	/* check value */
	err = bpf_map_lookup_elem(bpf_map__fd(skel->maps.map_b), &cgroup_fd, &val2);
	if (!ASSERT_OK(err, "map_lookup_elem"))
		goto out;
	if (!ASSERT_EQ(val2, 1, "map_lookup_elem, invalid val"))
		goto out;

	/* delete value */
	err = bpf_map_delete_elem(bpf_map__fd(skel->maps.map_b), &cgroup_fd);
	if (!ASSERT_OK(err, "map_delete_elem"))
		goto out;

	skel->bss->target_pid = sys_gettid();

	err = cgrp_ls_tp_btf__attach(skel);
	if (!ASSERT_OK(err, "skel_attach"))
		goto out;

	sys_gettid();
	sys_gettid();

	skel->bss->target_pid = 0;

	/* 3x syscalls: 1x attach and 2x gettid */
	ASSERT_EQ(skel->bss->enter_cnt, 3, "enter_cnt");
	ASSERT_EQ(skel->bss->exit_cnt, 3, "exit_cnt");
	ASSERT_EQ(skel->bss->mismatch_cnt, 0, "mismatch_cnt");
out:
	cgrp_ls_tp_btf__destroy(skel);
}

static void test_attach_cgroup(int cgroup_fd)
{
	int server_fd = 0, client_fd = 0, err = 0;
	socklen_t addr_len = sizeof(struct sockaddr_in6);
	struct cgrp_ls_attach_cgroup *skel;
	__u32 cookie_expected_value;
	struct sockaddr_in6 addr;
	struct socket_cookie val;

	skel = cgrp_ls_attach_cgroup__open_and_load();
	if (!ASSERT_OK_PTR(skel, "skel_open"))
		return;

	skel->links.set_cookie = bpf_program__attach_cgroup(
		skel->progs.set_cookie, cgroup_fd);
	if (!ASSERT_OK_PTR(skel->links.set_cookie, "prog_attach"))
		goto out;

	skel->links.update_cookie_sockops = bpf_program__attach_cgroup(
		skel->progs.update_cookie_sockops, cgroup_fd);
	if (!ASSERT_OK_PTR(skel->links.update_cookie_sockops, "prog_attach"))
		goto out;

Annotation

Implementation Notes