// SPDX-License-Identifier: GPL-2.0 #include <linux/bpf.h> #include <bpf/bpf_helpers.h> #include "bpf_trace_helpers.h" struct net_device { /* Structure does not need to contain all entries, * as "preserve_access_index" will use BTF to fix this... */ int ifindex; } __attribute__((preserve_access_index)); struct xdp_rxq_info { /* Structure does not need to contain all entries, * as "preserve_access_index" will use BTF to fix this... */ struct net_device *dev; __u32 queue_index; } __attribute__((preserve_access_index)); struct xdp_buff { void *data; void *data_end; void *data_meta; void *data_hard_start; unsigned long handle; struct xdp_rxq_info *rxq; } __attribute__((preserve_access_index)); __u64 test_result_fentry = 0; SEC("fentry/_xdp_tx_iptunnel") int BPF_PROG(trace_on_entry, struct xdp_buff *xdp) { test_result_fentry = xdp->rxq->dev->ifindex; return 0; } __u64 test_result_fexit = 0; SEC("fexit/_xdp_tx_iptunnel") int BPF_PROG(trace_on_exit, struct xdp_buff *xdp, int ret) { test_result_fexit = ret; return 0; }