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authorAlexander Duyck <alexander.h.duyck@redhat.com>2014-12-03 08:17:33 -0800
committerDavid S. Miller <davem@davemloft.net>2014-12-08 20:47:41 -0500
commit9c0c112422a2a6b06fcddcaf21957676490cebba (patch)
treee76b631781ae57c158b29ff85077847998693c1e /drivers/net
parent177211b993ec6d7a6f8f3b3595f647c378440c4e (diff)
net: Add functions for handling padding frame and adding to length
This patch adds two new helper functions skb_put_padto and eth_skb_pad. These functions deviate from the standard skb_pad or skb_padto in that they will also update the length and tail pointers so that they reflect the padding added to the frame. The eth_skb_pad helper is meant to be used with Ethernet devices to update either Rx or Tx frames so that they report the correct size. The skb_put_padto helper is meant to be used primarily in the transmit path for network devices that need frames to be padded up to some minimum size and don't wish to simply update the length somewhere external to the frame. The motivation behind this is that there are a number of implementations throughout the network device drivers that are all doing the same thing, but each a little bit differently and as a result several implementations contain bugs such as updating the length without updating the tail offset and other similar issues. Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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