tools/testing/selftests/bpf/progs/tailcall_cgrp_storage_no_storage.c
Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/tailcall_cgrp_storage_no_storage.c
File Facts
- System
- Linux kernel
- Corpus path
tools/testing/selftests/bpf/progs/tailcall_cgrp_storage_no_storage.c- Extension
.c- Size
- 495 bytes
- Lines
- 27
- 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
vmlinux.hbpf/bpf_helpers.h
Detected Declarations
function caller_progfunction leaf_prog
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0
#include <vmlinux.h>
#include <bpf/bpf_helpers.h>
struct {
__uint(type, BPF_MAP_TYPE_PROG_ARRAY);
__uint(max_entries, 1);
__uint(key_size, sizeof(__u32));
__uint(value_size, sizeof(__u32));
} prog_array SEC(".maps");
SEC("cgroup_skb/egress")
int caller_prog(struct __sk_buff *skb)
{
bpf_tail_call(skb, &prog_array, 0);
return 1;
}
SEC("cgroup_skb/egress")
int leaf_prog(struct __sk_buff *skb)
{
return 1;
}
char _license[] SEC("license") = "GPL";
Annotation
- Immediate include surface: `vmlinux.h`, `bpf/bpf_helpers.h`.
- Detected declarations: `function caller_prog`, `function leaf_prog`.
- 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.