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Commit bc1bafbb authored by David S. Miller's avatar David S. Miller
Browse files

bpf: Move endianness BPF helpers out of bpf_util.h 



We do not want to include things like stdio.h and friends into
eBPF program builds.  bpf_util.h is for host compiled programs,
so eBPF C-code helpers don't really belong there.

Add a new bpf_endian.h as a quick fix for this for now.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5b8481fa

tools/testing/selftests/bpf/bpf_endian.h

0 → 100644
+23 −0
Original line number Diff line number Diff line 
#ifndef __BPF_ENDIAN__

#define __BPF_ENDIAN__



#include <asm/byteorder.h>



#if __BYTE_ORDER == __LITTLE_ENDIAN

# define __bpf_ntohs(x)		__builtin_bswap16(x)

# define __bpf_htons(x)		__builtin_bswap16(x)

#elif __BYTE_ORDER == __BIG_ENDIAN

# define __bpf_ntohs(x)		(x)

# define __bpf_htons(x)		(x)

#else

# error "Fix your __BYTE_ORDER?!"

#endif



#define bpf_htons(x)				\

	(__builtin_constant_p(x) ?		\

	 __constant_htons(x) : __bpf_htons(x))

#define bpf_ntohs(x)				\

	(__builtin_constant_p(x) ?		\

	 __constant_ntohs(x) : __bpf_ntohs(x))



#endif

tools/testing/selftests/bpf/bpf_util.h

+0 −19
Original line number Diff line number Diff line
@@ -6,25 +6,6 @@ 
#include <string.h>

#include <errno.h>



#include <asm/byteorder.h>



#if __BYTE_ORDER == __LITTLE_ENDIAN

# define __bpf_ntohs(x)		__builtin_bswap16(x)

# define __bpf_htons(x)		__builtin_bswap16(x)

#elif __BYTE_ORDER == __BIG_ENDIAN

# define __bpf_ntohs(x)		(x)

# define __bpf_htons(x)		(x)

#else

# error "Fix your __BYTE_ORDER?!"

#endif



#define bpf_htons(x)				\

	(__builtin_constant_p(x) ?		\

	 __constant_htons(x) : __bpf_htons(x))

#define bpf_ntohs(x)				\

	(__builtin_constant_p(x) ?		\

	 __constant_ntohs(x) : __bpf_ntohs(x))



static inline unsigned int bpf_num_possible_cpus(void)

{

	static const char *fcpu = "/sys/devices/system/cpu/possible";

tools/testing/selftests/bpf/test_l4lb.c

+1 −1
Original line number Diff line number Diff line
@@ -19,7 +19,7 @@ 
#include <linux/udp.h>

#include "bpf_helpers.h"

#include "test_iptunnel_common.h"

#include "bpf_util.h"

#include "bpf_endian.h"



int _version SEC("version") = 1;

tools/testing/selftests/bpf/test_pkt_access.c

+1 −1
Original line number Diff line number Diff line
@@ -14,7 +14,7 @@ 
#include <linux/tcp.h>

#include <linux/pkt_cls.h>

#include "bpf_helpers.h"

#include "bpf_util.h"

#include "bpf_endian.h"



#define barrier() __asm__ __volatile__("": : :"memory")

int _version SEC("version") = 1;