| // SPDX-License-Identifier: GPL-2.0 |
| /* fails to load without expected_attach_type = BPF_XDP_DEVMAP |
| * because of access to egress_ifindex |
| */ |
| #include <linux/bpf.h> |
| #include <bpf/bpf_helpers.h> |
| |
| SEC("xdp") |
| int xdpdm_devlog(struct xdp_md *ctx) |
| { |
| char fmt[] = "devmap redirect: dev %u -> dev %u len %u\n"; |
| void *data_end = (void *)(long)ctx->data_end; |
| void *data = (void *)(long)ctx->data; |
| unsigned int len = data_end - data; |
| |
| bpf_trace_printk(fmt, sizeof(fmt), |
| ctx->ingress_ifindex, ctx->egress_ifindex, len); |
| |
| return XDP_PASS; |
| } |
| |
| char _license[] SEC("license") = "GPL"; |
