diff options
Diffstat (limited to 'net/core/skbuff.c')
| -rw-r--r-- | net/core/skbuff.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 52ba2b5e803d..9e8caa0c4f72 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -1699,17 +1699,18 @@ static bool __skb_splice_bits(struct sk_buff *skb, struct pipe_inode_info *pipe, struct splice_pipe_desc *spd, struct sock *sk) { int seg; - bool head_is_linear = !skb->head_frag; + bool head_is_locked = !skb->head_frag || skb_cloned(skb); /* map the linear part : - * If skb->head_frag is set, this 'linear' part is backed - * by a fragment, and we can avoid a copy. + * If skb->head_frag is set, this 'linear' part is backed by a + * fragment, and if the head is not shared with any clones then + * we can avoid a copy since we own the head portion of this page. */ if (__splice_segment(virt_to_page(skb->data), (unsigned long) skb->data & (PAGE_SIZE - 1), skb_headlen(skb), offset, len, skb, spd, - head_is_linear, + head_is_locked, sk, pipe)) return true; |
