Commit d1a203ea authored by Stephen Hemminger's avatar Stephen Hemminger Committed by David S. Miller

net: add documentation for skb recycling

Commit 04a4bb55 ("net: add
skb_recycle_check() to enable netdriver skb recycling") added a
method for network drivers to recycle skbuffs, but while use of
this mechanism was documented in the commit message, it should
really have been added as a docbook comment as well -- this
patch does that.
Signed-off-by: default avatarStephen Hemminger <shemminger@vyatta.com>
Signed-off-by: default avatarLennert Buytenhek <buytenh@marvell.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 920da692
...@@ -449,6 +449,18 @@ void kfree_skb(struct sk_buff *skb) ...@@ -449,6 +449,18 @@ void kfree_skb(struct sk_buff *skb)
__kfree_skb(skb); __kfree_skb(skb);
} }
/**
* skb_recycle_check - check if skb can be reused for receive
* @skb: buffer
* @skb_size: minimum receive buffer size
*
* Checks that the skb passed in is not shared or cloned, and
* that it is linear and its head portion at least as large as
* skb_size so that it can be recycled as a receive buffer.
* If these conditions are met, this function does any necessary
* reference count dropping and cleans up the skbuff as if it
* just came from __alloc_skb().
*/
int skb_recycle_check(struct sk_buff *skb, int skb_size) int skb_recycle_check(struct sk_buff *skb, int skb_size)
{ {
struct skb_shared_info *shinfo; struct skb_shared_info *shinfo;
......
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