net: add function to allocate sk_buff head without data area

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Add a function to allocate a sk_buff head without any data. This will
be used by memory mapped netlink to attach data from the mmaped area
to the skb.

Additionally change skb_release_all() to check whether the skb has a
data area to allow the skb destructor to clear the data pointer in case
only a head has been allocated.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Patrick McHardy 2013-04-17 06:46:58 +00:00 • committed by David S. Miller

parent e32123e598

commit 0ebd0ac5ff

2 changed files with 35 additions and 1 deletions

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6

include/linux/skbuff.h

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30

net/core/skbuff.c

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