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// 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";
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