net: add IFF_SKB_TX_SHARED flag to priv_flags
authorNeil Horman <nhorman@tuxdriver.com>
Tue, 26 Jul 2011 06:05:37 +0000 (06:05 +0000)
committerDavid S. Miller <davem@davemloft.net>
Thu, 28 Jul 2011 05:39:30 +0000 (22:39 -0700)
commitd8873315065f1f527c7c380402cf59b1e1d0ae36
tree41a9c15f75b41657dd5370fe135f16c40b3eab64
parent894dc24ce75aa238ce96422a36b1537ccf2d8831
net: add IFF_SKB_TX_SHARED flag to priv_flags

Pktgen attempts to transmit shared skbs to net devices, which can't be used by
some drivers as they keep state information in skbs.  This patch adds a flag
marking drivers as being able to handle shared skbs in their tx path.  Drivers
are defaulted to being unable to do so, but calling ether_setup enables this
flag, as 90% of the drivers calling ether_setup touch real hardware and can
handle shared skbs.  A subsequent patch will audit drivers to ensure that the
flag is set properly

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Reported-by: Jiri Pirko <jpirko@redhat.com>
CC: Robert Olsson <robert.olsson@its.uu.se>
CC: Eric Dumazet <eric.dumazet@gmail.com>
CC: Alexey Dobriyan <adobriyan@gmail.com>
CC: David S. Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/linux/if.h
net/core/pktgen.c
net/ethernet/eth.c