netdev - Re: [ethtool PATCH 4/6] Add support for _

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Date:	Wed, 27 Apr 2011 16:54:52 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Alexander Duyck <alexander.h.duyck@...el.com>
Cc:	davem@...emloft.net, jeffrey.t.kirsher@...el.com,
	netdev@...r.kernel.org
Subject: Re: [ethtool PATCH 4/6] Add support for __be64 and bitops to
 ethtool

On Thu, 2011-04-21 at 13:40 -0700, Alexander Duyck wrote:
> This change is meant to add support for __be64 values and bitops to
> ethtool.  These changes will be needed in order to support network flow
> classifier rule configuration.
> 
> Signed-off-by: Alexander Duyck <alexander.h.duyck@...el.com>
> ---
> 
>  ethtool-bitops.h |   25 +++++++++++++++++++++++++
>  ethtool-util.h   |   30 ++++++++++++++++++++++++++----
>  ethtool.c        |    7 -------
>  3 files changed, 51 insertions(+), 11 deletions(-)
>  create mode 100644 ethtool-bitops.h
> 
> diff --git a/ethtool-bitops.h b/ethtool-bitops.h
> new file mode 100644
> index 0000000..0ff14f1
> --- /dev/null
> +++ b/ethtool-bitops.h
> @@ -0,0 +1,25 @@
> +#ifndef ETHTOOL_BITOPS_H__
> +#define ETHTOOL_BITOPS_H__
> +
> +#define BITS_PER_BYTE		8
> +#define BITS_PER_LONG		(BITS_PER_BYTE * sizeof(long))
> +#define DIV_ROUND_UP(n, d)	(((n) + (d) - 1) / (d))
> +#define BITS_TO_LONGS(nr)	DIV_ROUND_UP(nr, BITS_PER_LONG)
> +
> +static inline void set_bit(int nr, unsigned long *addr)
> +{
> +	addr[nr / BITS_PER_LONG] |= 1UL << (nr % BITS_PER_LONG);
> +}
> +
> +static inline void clear_bit(int nr, unsigned long *addr)
> +{
> +	addr[nr / BITS_PER_LONG] &= ~(1UL << (nr % BITS_PER_LONG));
> +}
> +
> +static __always_inline int test_bit(unsigned int nr, const unsigned long *addr)
> +{
> +	return !!((1UL << (nr % BITS_PER_LONG)) &
> +		  (((unsigned long *)addr)[nr / BITS_PER_LONG]));
> +}

Where is __always_inline supposed to be defined?

> +#endif
> diff --git a/ethtool-util.h b/ethtool-util.h
> index f053028..3d46faf 100644
> --- a/ethtool-util.h
> +++ b/ethtool-util.h
> @@ -5,15 +5,18 @@
>  
>  #include <sys/types.h>
>  #include <endian.h>
> +#include <sys/ioctl.h>
> +#include <net/if.h>
> +#include "ethtool-config.h"
> +#include "ethtool-copy.h"
>  
>  /* ethtool.h expects these to be defined by <linux/types.h> */
>  #ifndef HAVE_BE_TYPES
>  typedef __uint16_t __be16;
>  typedef __uint32_t __be32;
> +typedef unsigned long long __be64;
>  #endif
>  
> -#include "ethtool-copy.h"
> -

You can't move the inclusion of ethtool-copy.h; that defeats the whole
purpose of the HAVE_BE_TYPES feature test.

[...]
> +#ifndef ARRAY_SIZE
> +#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
> +#endif
> +
> +#ifndef SIOCETHTOOL
> +#define SIOCETHTOOL     0x8946
>  #endif
>  
>  /* National Semiconductor DP83815, DP83816 */
> diff --git a/ethtool.c b/ethtool.c
> index 9ad7000..15af86a 100644
> --- a/ethtool.c
> +++ b/ethtool.c
> @@ -45,16 +45,9 @@
>  #include <linux/sockios.h>
>  #include "ethtool-util.h"
>  
> -
> -#ifndef SIOCETHTOOL
> -#define SIOCETHTOOL     0x8946
> -#endif
>  #ifndef MAX_ADDR_LEN
>  #define MAX_ADDR_LEN	32
>  #endif
> -#ifndef ARRAY_SIZE
> -#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
> -#endif
>  
>  #ifndef HAVE_NETIF_MSG
>  enum {
> 

Presumably this is needed by the next patch, but it has nothing to do
with what the commit message says.

Ben.

-- 
Ben Hutchings, Senior Software Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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