tools/testing/selftests/bpf/prog_tests/cgroup_skb_direct_packet_access.c
Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/prog_tests/cgroup_skb_direct_packet_access.c
File Facts
- System
- Linux kernel
- Corpus path
tools/testing/selftests/bpf/prog_tests/cgroup_skb_direct_packet_access.c- Extension
.c- Size
- 781 bytes
- Lines
- 29
- 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.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
test_progs.hcgroup_skb_direct_packet_access.skel.h
Detected Declarations
function test_cgroup_skb_prog_run_direct_packet_access
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include "cgroup_skb_direct_packet_access.skel.h"
void test_cgroup_skb_prog_run_direct_packet_access(void)
{
int err;
struct cgroup_skb_direct_packet_access *skel;
char test_skb[64] = {};
LIBBPF_OPTS(bpf_test_run_opts, topts,
.data_in = test_skb,
.data_size_in = sizeof(test_skb),
);
skel = cgroup_skb_direct_packet_access__open_and_load();
if (!ASSERT_OK_PTR(skel, "cgroup_skb_direct_packet_access__open_and_load"))
return;
err = bpf_prog_test_run_opts(bpf_program__fd(skel->progs.direct_packet_access), &topts);
ASSERT_OK(err, "bpf_prog_test_run_opts err");
ASSERT_EQ(topts.retval, 1, "retval");
ASSERT_NEQ(skel->bss->data_end, 0, "data_end");
cgroup_skb_direct_packet_access__destroy(skel);
}
Annotation
- Immediate include surface: `test_progs.h`, `cgroup_skb_direct_packet_access.skel.h`.
- Detected declarations: `function test_cgroup_skb_prog_run_direct_packet_access`.
- Atlas domain: Support Tooling And Documentation / tools.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.