| #include "../../include/bpf_api.h" |
| |
| /* Cyclic dependency example to test the kernel's runtime upper |
| * bound on loops. Also demonstrates on how to use direct-actions, |
| * loaded as: tc filter add [...] bpf da obj [...] |
| */ |
| #define JMP_MAP_ID 0xabccba |
| |
| BPF_PROG_ARRAY(jmp_tc, JMP_MAP_ID, PIN_OBJECT_NS, 1); |
| |
| __section_tail(JMP_MAP_ID, 0) |
| int cls_loop(struct __sk_buff *skb) |
| { |
| char fmt[] = "cb: %u\n"; |
| |
| trace_printk(fmt, sizeof(fmt), skb->cb[0]++); |
| tail_call(skb, &jmp_tc, 0); |
| |
| skb->tc_classid = TC_H_MAKE(1, 42); |
| return TC_ACT_OK; |
| } |
| |
| __section_cls_entry |
| int cls_entry(struct __sk_buff *skb) |
| { |
| tail_call(skb, &jmp_tc, 0); |
| return TC_ACT_SHOT; |
| } |
| |
| BPF_LICENSE("GPL"); |