1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2019 Facebook 3 #include <linux/bpf.h> 4 #include <bpf/bpf_helpers.h> 5 #define ATTR __attribute__((noinline)) 6 #include "test_jhash.h" 7 8 SEC("tc") 9 int balancer_ingress(struct __sk_buff *ctx) 10 { 11 void *data_end = (void *)(long)ctx->data_end; 12 void *data = (void *)(long)ctx->data; 13 void *ptr; 14 int ret = 0, nh_off, i = 0; 15 16 nh_off = 14; 17 18 /* pragma unroll doesn't work on large loops */ 19 20 #define C do { \ 21 ptr = data + i; \ 22 if (ptr + nh_off > data_end) \ 23 break; \ 24 ctx->tc_index = jhash(ptr, nh_off, ctx->cb[0] + i++); \ 25 } while (0); 26 #define C30 C;C;C;C;C;C;C;C;C;C;C;C;C;C;C;C;C;C;C;C;C;C;C;C;C;C;C;C;C;C; 27 C30;C30;C30; /* 90 calls */ 28 return 0; 29 } 30 char _license[] SEC("license") = "GPL"; 31