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authorEric Dumazet <edumazet@google.com>2012-05-19 03:02:02 +0000
committerDavid S. Miller <davem@davemloft.net>2012-05-19 18:34:57 -0400
commitbad43ca8325f493dcaa0896c2f036276af059c7e (patch)
treeee27a3b3eeef928f22cd500a32a23e4db60a5584 /include
parent3dde25988292864a582b4a9389b1ae835aa3fe80 (diff)
downloadlinux-bad43ca8325f493dcaa0896c2f036276af059c7e.tar.gz
net: introduce skb_try_coalesce()
Move tcp_try_coalesce() protocol independent part to skb_try_coalesce(). skb_try_coalesce() can be used in IPv4 defrag and IPv6 reassembly, to build optimized skbs (less sk_buff, and possibly less 'headers') skb_try_coalesce() is zero copy, unless the copy can fit in destination header (its a rare case) kfree_skb_partial() is also moved to net/core/skbuff.c and exported, because IPv6 will need it in patch (ipv6: use skb coalescing in reassembly). Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/skbuff.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index fe37c21d3a6..0e501714d47 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -562,6 +562,11 @@ extern void kfree_skb(struct sk_buff *skb);
extern void consume_skb(struct sk_buff *skb);
extern void __kfree_skb(struct sk_buff *skb);
extern struct kmem_cache *skbuff_head_cache;
+
+extern void kfree_skb_partial(struct sk_buff *skb, bool head_stolen);
+extern bool skb_try_coalesce(struct sk_buff *to, struct sk_buff *from,
+ bool *fragstolen, int *delta_truesize);
+
extern struct sk_buff *__alloc_skb(unsigned int size,
gfp_t priority, int fclone, int node);
extern struct sk_buff *build_skb(void *data, unsigned int frag_size);