From 7e13e59bf64f4b1563334eaefd514f2f9bea2c31 Mon Sep 17 00:00:00 2001 From: Vasily Averin Date: Tue, 24 Dec 2024 21:16:21 -0800 Subject: skbuff: introduce skb_expand_head() [ Upstream commit f1260ff15a71b8fc122b2c9abd8a7abffb6e0168 ] Like skb_realloc_headroom(), new helper increases headroom of specified skb. Unlike skb_realloc_headroom(), it does not allocate a new skb if possible; copies skb->sk on new skb when as needed and frees original skb in case of failures. This helps to simplify ip[6]_finish_output2() and a few other similar cases. Signed-off-by: Vasily Averin Signed-off-by: David S. Miller (cherry picked from commit f1260ff15a71b8fc122b2c9abd8a7abffb6e0168) Signed-off-by: Harshvardhan Jha Signed-off-by: Sasha Levin --- include/linux/skbuff.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 3191d0ffc6e9..4edce28fb454 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1118,6 +1118,7 @@ static inline struct sk_buff *__pskb_copy(struct sk_buff *skb, int headroom, int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail, gfp_t gfp_mask); struct sk_buff *skb_realloc_headroom(struct sk_buff *skb, unsigned int headroom); +struct sk_buff *skb_expand_head(struct sk_buff *skb, unsigned int headroom); struct sk_buff *skb_copy_expand(const struct sk_buff *skb, int newheadroom, int newtailroom, gfp_t priority); int __must_check skb_to_sgvec_nomark(struct sk_buff *skb, struct scatterlist *sg, -- cgit v1.2.3