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  1. 22 4月, 2010 1 次提交
  3. 21 4月, 2010 1 次提交
  5. 27 12月, 2009 1 次提交
  7. 16 11月, 2009 1 次提交
  9. 25 5月, 2009 1 次提交
  11. 24 11月, 2008 1 次提交
    • E
      eth: Declare an optimized compare_ether_addr_64bits() function · 1f87e235
      由 Eric Dumazet 提交于 
      Linus mentioned we could try to perform long word operations, even
on potentially unaligned addresses, on x86 at least. David mentioned
the HAVE_EFFICIENT_UNALIGNED_ACCESS test to handle this on all
arches that have efficient unailgned accesses.

I tried this idea and got nice assembly on 32 bits:

158:   33 82 38 01 00 00       xor    0x138(%edx),%eax
15e:   33 8a 34 01 00 00       xor    0x134(%edx),%ecx
164:   c1 e0 10                shl    $0x10,%eax
167:   09 c1                   or     %eax,%ecx
169:   74 0b                   je     176 <eth_type_trans+0x87>

And very nice assembly on 64 bits of course (one xor, one shl)

Nice oprofile improvement in eth_type_trans(), 0.17 % instead of 0.41 %,
expected since we remove 8 instructions on a fast path.

This patch implements a compare_ether_addr_64bits() function, that
uses the CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS ifdef to efficiently
perform the 6 bytes comparison on all capable arches.
Signed-off-by: NEric Dumazet <dada1@cosmosbay.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      1f87e235
  13. 20 11月, 2008 1 次提交
  15. 09 10月, 2008 2 次提交
  17. 21 9月, 2008 1 次提交
  19. 14 4月, 2008 1 次提交
  21. 29 1月, 2008 1 次提交
    • M
      [ETH]: Combine format_addr() with print_mac(). · 7ffc49a6
      由 Michael Chan 提交于 
      print_mac() used many most net drivers and format_addr() used by
net-sysfs.c are very similar and they can be intergrated.

format_addr() is also identically redefined in the qla4xxx iscsi
driver.

Export a new function sysfs_format_mac() to be used by net-sysfs,
qla4xxx and others in the future.  Both print_mac() and
sysfs_format_mac() call _format_mac_addr() to do the formatting.

Changed print_mac() to use unsigned char * to be consistent with
net_device struct's dev_addr.  Added buffer length overrun checking
as suggested by Joe Perches.
Signed-off-by: NMichael Chan <mchan@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      7ffc49a6
  23. 24 10月, 2007 1 次提交
  25. 11 10月, 2007 4 次提交
  27. 12 7月, 2007 1 次提交
  29. 11 7月, 2007 1 次提交
  31. 26 4月, 2007 3 次提交
  33. 15 2月, 2007 1 次提交
    • T
      [PATCH] remove many unneeded #includes of sched.h · cd354f1a
      由 Tim Schmielau 提交于 
      After Al Viro (finally) succeeded in removing the sched.h #include in module.h
recently, it makes sense again to remove other superfluous sched.h includes.
There are quite a lot of files which include it but don't actually need
anything defined in there.  Presumably these includes were once needed for
macros that used to live in sched.h, but moved to other header files in the
course of cleaning it up.

To ease the pain, this time I did not fiddle with any header files and only
removed #includes from .c-files, which tend to cause less trouble.

Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
configs in arch/arm/configs on arm.  I also checked that no new warnings were
introduced by the patch (actually, some warnings are removed that were emitted
by unnecessarily included header files).
Signed-off-by: NTim Schmielau <tim@physik3.uni-rostock.de>
Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      cd354f1a
  35. 11 2月, 2007 1 次提交
  37. 03 12月, 2006 1 次提交
  39. 29 9月, 2006 1 次提交
  41. 23 9月, 2006 2 次提交
  43. 01 7月, 2006 1 次提交
  45. 24 2月, 2006 1 次提交
    • J
      [NET] ethernet: Fix first packet goes out with MAC 00:00:00:00:00:00 · f8d0e3f1
      由 Jamal Hadi Salim 提交于 
      When you turn off ARP on a netdevice then the first packet always goes
out with a dstMAC of all zeroes. This is because the first packet is
used to resolve ARP entries. Even though the ARP entry may be resolved
(I tried by setting a static ARP entry for a host i was pinging from),
it gets overwritten by virtue of having the netdevice disabling ARP.

Subsequent packets go out fine with correct dstMAC address (which may
be why people have ignored reporting this issue).

To cut the story short: 

the culprit code is in net/ethernet/eth.c::eth_header()

----
        /*
         *      Anyway, the loopback-device should never use this
function...
         */

        if (dev->flags & (IFF_LOOPBACK|IFF_NOARP))
        {
                memset(eth->h_dest, 0, dev->addr_len);
                return ETH_HLEN;
        }

	if(daddr)
        {
                memcpy(eth->h_dest,daddr,dev->addr_len);
                return ETH_HLEN;
        }

----

Note how the h_dest is being reset when device has IFF_NOARP.

As a note:
All devices including loopback pass a daddr. loopback in fact passes
a 0 all the time ;-> 
This means i can delete the check totaly or i can remove the IFF_NOARP

Alexey says:
--------------------
I think, it was me who did this crap. It was so long ago I do not remember
why it was made.

I remember some troubles with dummy device. It tried to resolve
addresses, apparently, without success and generated errors instead of
blackholing. I think the problem was eventually solved at neighbour
level.

After some thinking I suspect the deletion of this chunk could change
behaviour of some parts which do not use neighbour cache f.e. packet
socket.

I think safer approach would be to move this chunk after if (daddr).
And the possibility to remove this completely could be analyzed later.
--------------------

Patch updated with Alexey's safer suggestions.
Signed-off-by: NJamal Hadi Salim <hadi@cyberus.ca>
Acked-by: NAlexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      f8d0e3f1
  47. 07 1月, 2006 1 次提交
  49. 06 1月, 2006 1 次提交
  51. 29 10月, 2005 1 次提交
  53. 29 9月, 2005 1 次提交
  55. 28 9月, 2005 1 次提交
  57. 30 8月, 2005 2 次提交
  59. 13 7月, 2005 1 次提交
  61. 29 6月, 2005 1 次提交
  63. 06 5月, 2005 1 次提交