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net: Add skb_unclone() helper function.

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This function will be used in next GRE_GSO patch. This patch does
not change any functionality.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Eric Dumazet <edumazet@google.com>
This commit is contained in:
Pravin B Shelar
2013-02-14 09:44:49 +00:00
committed by David S. Miller
parent d887199dc2
commit 14bbd6a565
13 changed files with 23 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
net/ipv6/ah6.c
View File

@@ -521,8 +521,7 @@ static int ah6_input(struct xfrm_state *x, struct sk_buff *skb)
/* We are going to _remove_ AH header to keep sockets happy,
* so... Later this can change. */
if (skb_cloned(skb) &&
pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
if (skb_unclone(skb, GFP_ATOMIC))
goto out;
skb->ip_summed = CHECKSUM_NONE;

2
net/ipv6/netfilter/nf_conntrack_reasm.c
View File

@@ -368,7 +368,7 @@ nf_ct_frag6_reasm(struct frag_queue *fq, struct net_device *dev)
}
/* Head of list must not be cloned. */
if (skb_cloned(head) && pskb_expand_head(head, 0, 0, GFP_ATOMIC)) {
if (skb_unclone(head, GFP_ATOMIC)) {
pr_debug("skb is cloned but can't expand head");
goto out_oom;
}

2
net/ipv6/reassembly.c
View File

@@ -404,7 +404,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
goto out_oversize;
/* Head of list must not be cloned. */
if (skb_cloned(head) && pskb_expand_head(head, 0, 0, GFP_ATOMIC))
if (skb_unclone(head, GFP_ATOMIC))
goto out_oom;
/* If the first fragment is fragmented itself, we split

3
net/ipv6/xfrm6_mode_tunnel.c
View File

@@ -69,8 +69,7 @@ static int xfrm6_mode_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
goto out;
if (skb_cloned(skb) &&
(err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC)))
if (err = skb_unclone(skb, GFP_ATOMIC))
goto out;
if (x->props.flags & XFRM_STATE_DECAP_DSCP)