diff options
| author | Alexander Duyck <alexander.h.duyck@intel.com> | 2012-05-03 05:09:42 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-05-03 21:18:37 +0400 |
| commit | 3a7c1ee4ab89f9250b8f82656a7be0ae14aa3691 (patch) | |
| tree | 9dc10e067f2364fd3590b38cd5db495cd09c32e6 /net | |
| parent | 715dc1f342713816d1be1c37643a2c9e6ee181a7 (diff) | |
| download | linux-3a7c1ee4ab89f9250b8f82656a7be0ae14aa3691.tar.xz | |
skb: Add skb_head_is_locked helper function
This patch adds support for a skb_head_is_locked helper function. It is
meant to be used any time we are considering transferring the head from
skb->head to a paged frag. If the head is locked it means we cannot remove
the head from the skb so it must be copied or we must take the skb as a
whole.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/skbuff.c | 3 | ||||
| -rw-r--r-- | net/ipv4/tcp_input.c | 2 |
2 files changed, 2 insertions, 3 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index e1f8bbaadf52..c199aa428c6d 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -1699,7 +1699,6 @@ 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_locked = !skb->head_frag || skb_cloned(skb); /* map the linear part : * If skb->head_frag is set, this 'linear' part is backed by a @@ -1710,7 +1709,7 @@ static bool __skb_splice_bits(struct sk_buff *skb, struct pipe_inode_info *pipe, (unsigned long) skb->data & (PAGE_SIZE - 1), skb_headlen(skb), offset, len, skb, spd, - head_is_locked, + skb_head_is_locked(skb), sk, pipe)) return true; diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index 84e69e02fe20..7b2d351f24db 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -4568,7 +4568,7 @@ static bool tcp_try_coalesce(struct sock *sk, skb_shinfo(from)->nr_frags >= MAX_SKB_FRAGS) return false; - if (!from->head_frag || skb_cloned(from)) + if (skb_head_is_locked(from)) return false; delta = from->truesize - SKB_DATA_ALIGN(sizeof(struct sk_buff)); |