tools/testing/selftests/bpf/progs/test_xdp_with_devmap_frags_helpers.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/test_xdp_with_devmap_frags_helpers.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/test_xdp_with_devmap_frags_helpers.c
Extension
.c
Size
574 bytes
Lines
28
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

// SPDX-License-Identifier: GPL-2.0
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>

struct {
	__uint(type, BPF_MAP_TYPE_DEVMAP);
	__uint(key_size, sizeof(__u32));
	__uint(value_size, sizeof(struct bpf_devmap_val));
	__uint(max_entries, 4);
} dm_ports SEC(".maps");

/* valid program on DEVMAP entry via SEC name;
 * has access to egress and ingress ifindex
 */
SEC("xdp/devmap")
int xdp_dummy_dm(struct xdp_md *ctx)
{
	return XDP_PASS;
}

SEC("xdp.frags/devmap")
int xdp_dummy_dm_frags(struct xdp_md *ctx)
{
	return XDP_PASS;
}

char _license[] SEC("license") = "GPL";

Annotation

Implementation Notes