25763b3c86
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of version 2 of the gnu general public license as published by the free software foundation extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 107 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190528171438.615055994@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/* Copyright (c) 2017 Facebook
|
|
*/
|
|
#include <stddef.h>
|
|
#include <string.h>
|
|
#include <linux/bpf.h>
|
|
#include <linux/pkt_cls.h>
|
|
#include "bpf_helpers.h"
|
|
|
|
int _version SEC("version") = 1;
|
|
|
|
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
|
|
#define TEST_FIELD(TYPE, FIELD, MASK) \
|
|
{ \
|
|
TYPE tmp = *(volatile TYPE *)&skb->FIELD; \
|
|
if (tmp != ((*(volatile __u32 *)&skb->FIELD) & MASK)) \
|
|
return TC_ACT_SHOT; \
|
|
}
|
|
#else
|
|
#define TEST_FIELD_OFFSET(a, b) ((sizeof(a) - sizeof(b)) / sizeof(b))
|
|
#define TEST_FIELD(TYPE, FIELD, MASK) \
|
|
{ \
|
|
TYPE tmp = *((volatile TYPE *)&skb->FIELD + \
|
|
TEST_FIELD_OFFSET(skb->FIELD, TYPE)); \
|
|
if (tmp != ((*(volatile __u32 *)&skb->FIELD) & MASK)) \
|
|
return TC_ACT_SHOT; \
|
|
}
|
|
#endif
|
|
|
|
SEC("test1")
|
|
int process(struct __sk_buff *skb)
|
|
{
|
|
TEST_FIELD(__u8, len, 0xFF);
|
|
TEST_FIELD(__u16, len, 0xFFFF);
|
|
TEST_FIELD(__u32, len, 0xFFFFFFFF);
|
|
TEST_FIELD(__u16, protocol, 0xFFFF);
|
|
TEST_FIELD(__u32, protocol, 0xFFFFFFFF);
|
|
TEST_FIELD(__u8, hash, 0xFF);
|
|
TEST_FIELD(__u16, hash, 0xFFFF);
|
|
TEST_FIELD(__u32, hash, 0xFFFFFFFF);
|
|
|
|
return TC_ACT_OK;
|
|
}
|