LXR linux/tools/testing/selftests/bpf/progs/test_verif

   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
   8SEC("scale90_noinline")
   9int 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}
  30char _license[] SEC("license") = "GPL";
  31