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.. SPDX-License-Identifier: GPL-2.0
struct sk_buff
==============
:c:type:`sk_buff` is the main networking structure representing
a packet.
Basic sk_buff geometry
----------------------
.. kernel-doc:: include/linux/skbuff.h
:doc: Basic sk_buff geometry
Shared skbs and skb clones
--------------------------
:c:member:`sk_buff.users` is a simple refcount allowing multiple entities
to keep a struct sk_buff alive. skbs with a ``sk_buff.users != 1`` are referred
to as shared skbs (see skb_shared()).
skb_clone() allows for fast duplication of skbs. None of the data buffers
get copied, but caller gets a new metadata struct (struct sk_buff).
&skb_shared_info.refcount indicates the number of skbs pointing at the same
packet data (i.e. clones).
dataref and headerless skbs
---------------------------
.. kernel-doc:: include/linux/skbuff.h
:doc: dataref and headerless skbs
Checksum information
--------------------
.. kernel-doc:: include/linux/skbuff.h
:doc: skb checksums
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