| // 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; |
| } |