tools/testing/selftests/bpf/flow_dissector_load.c

File Facts

System

Linux kernel

Corpus path

tools/testing/selftests/bpf/flow_dissector_load.c

Extension

.c

Size

2349 bytes

Lines

112

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

• error.h
• errno.h
• getopt.h
• stdio.h
• stdlib.h
• string.h
• sys/stat.h
• fcntl.h
• unistd.h
• bpf/bpf.h
• bpf/libbpf.h
• flow_dissector_load.h

Detected Declarations

• function load_and_attach_program
• function detach_program
• function parse_opts
• function main

Annotated Snippet

switch (c) {
		case 'a':
			if (detach)
				error(1, 0, "attach/detach are exclusive");
			attach = true;
			break;
		case 'd':
			if (attach)
				error(1, 0, "attach/detach are exclusive");
			detach = true;
			break;
		case 'p':
			if (cfg_path_name)
				error(1, 0, "only one path can be given");

			cfg_path_name = optarg;
			break;
		case 's':
			if (cfg_prog_name)
				error(1, 0, "only one prog can be given");

			cfg_prog_name = optarg;
			break;
		}
	}

	if (detach)
		cfg_attach = false;

	if (cfg_attach && !cfg_path_name)
		error(1, 0, "must provide a path to the BPF program");

	if (cfg_attach && !cfg_prog_name)
		error(1, 0, "must provide a section name");
}

int main(int argc, char **argv)
{
	parse_opts(argc, argv);
	if (cfg_attach)
		load_and_attach_program();
	else
		detach_program();
	return 0;
}

Annotation

• Immediate include surface: `error.h`, `errno.h`, `getopt.h`, `stdio.h`, `stdlib.h`, `string.h`, `sys/stat.h`, `fcntl.h`.
• Detected declarations: `function load_and_attach_program`, `function detach_program`, `function parse_opts`, `function main`.
• 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.