tools/bpf/bpftool/prog.c

File Facts

System

Linux kernel

Corpus path

tools/bpf/bpftool/prog.c

Extension

.c

Size

61383 bytes

Lines

2619

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

• errno.h
• fcntl.h
• signal.h
• stdarg.h
• stdio.h
• stdlib.h
• string.h
• time.h
• unistd.h
• net/if.h
• sys/ioctl.h
• sys/types.h
• sys/stat.h
• sys/syscall.h
• dirent.h
• linux/err.h
• linux/perf_event.h
• linux/sizes.h
• linux/keyctl.h
• bpf/bpf.h
• bpf/btf.h
• bpf/hashmap.h
• bpf/libbpf.h
• bpf/libbpf_internal.h
• bpf/skel_internal.h
• cfg.h
• main.h
• xlated_dumper.h
• profiler.skel.h

Detected Declarations

• struct map_replace
• struct profile_metric
• enum dump_mode
• enum prog_tracelog_mode
• function parse_attach_type
• function prep_prog_info
• function print_boot_time
• function show_prog_maps
• function has_metadata_prefix
• function show_prog_metadata
• function print_prog_header_json
• function print_prog_json
• function print_prog_header_plain
• function print_prog_plain
• function show_prog
• function do_show_subset
• function do_show
• function prog_dump
• function do_dump
• function do_pin
• function map_replace_compar
• function parse_attach_detach_args
• function do_attach
• function do_detach
• function prog_tracelog_stream
• function do_tracelog_any
• function check_single_stdin
• function get_run_data
• function hex_print
• function print_run_output
• function alloc_run_data
• function do_run
• function get_prog_type_by_name
• function auto_attach_program
• function auto_attach_programs
• function bpf_object__for_each_program
• function load_with_options
• function bpf_object__for_each_program
• function bpf_object__for_each_map
• function count_open_fds
• function try_loader
• function do_loader
• function do_load
• function do_loadall
• function do_profile
• function profile_parse_metrics
• function profile_read_values
• function profile_print_readings_json

Annotated Snippet

struct map_replace {
	int idx;
	int fd;
	char *name;
};

static int map_replace_compar(const void *p1, const void *p2)
{
	const struct map_replace *a = p1, *b = p2;

	return a->idx - b->idx;
}

static int parse_attach_detach_args(int argc, char **argv, int *progfd,
				    enum bpf_attach_type *attach_type,
				    int *mapfd)
{
	if (!REQ_ARGS(3))
		return -EINVAL;

	*progfd = prog_parse_fd(&argc, &argv);
	if (*progfd < 0)
		return *progfd;

	*attach_type = parse_attach_type(*argv);
	if (*attach_type == __MAX_BPF_ATTACH_TYPE) {
		p_err("invalid attach/detach type");
		return -EINVAL;
	}

	if (*attach_type == BPF_FLOW_DISSECTOR) {
		*mapfd = 0;
		return 0;
	}

	NEXT_ARG();
	if (!REQ_ARGS(2))
		return -EINVAL;

	*mapfd = map_parse_fd(&argc, &argv, 0);
	if (*mapfd < 0)
		return *mapfd;

	return 0;
}

static int do_attach(int argc, char **argv)
{
	enum bpf_attach_type attach_type;
	int err, progfd;
	int mapfd;

	err = parse_attach_detach_args(argc, argv,
				       &progfd, &attach_type, &mapfd);
	if (err)
		return err;

	err = bpf_prog_attach(progfd, mapfd, attach_type, 0);
	if (err) {
		p_err("failed prog attach to map");
		return -EINVAL;
	}

	if (json_output)
		jsonw_null(json_wtr);
	return 0;
}

static int do_detach(int argc, char **argv)
{
	enum bpf_attach_type attach_type;
	int err, progfd;
	int mapfd;

	err = parse_attach_detach_args(argc, argv,
				       &progfd, &attach_type, &mapfd);
	if (err)
		return err;

	err = bpf_prog_detach2(progfd, mapfd, attach_type);
	if (err) {
		p_err("failed prog detach from map");
		return -EINVAL;
	}

	if (json_output)
		jsonw_null(json_wtr);
	return 0;
}

Annotation

• Immediate include surface: `errno.h`, `fcntl.h`, `signal.h`, `stdarg.h`, `stdio.h`, `stdlib.h`, `string.h`, `time.h`.
• Detected declarations: `struct map_replace`, `struct profile_metric`, `enum dump_mode`, `enum prog_tracelog_mode`, `function parse_attach_type`, `function prep_prog_info`, `function print_boot_time`, `function show_prog_maps`, `function has_metadata_prefix`, `function show_prog_metadata`.
• 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.