From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julian Anastasov Subject: [PATCHv2 net-next 01/15] net: add skb_dst_set_unref Date: Sat, 9 Mar 2013 23:16:41 +0200 Message-ID: <1362863815-5898-2-git-send-email-ja@ssi.bg> References: <1362863815-5898-1-git-send-email-ja@ssi.bg> Cc: lvs-devel@vger.kernel.org, netdev@vger.kernel.org To: Simon Horman Return-path: In-Reply-To: <1362863815-5898-1-git-send-email-ja@ssi.bg> Sender: lvs-devel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org skb_dst_set_unref will use noref version even for DST_NOCACHE entries because DST_NOCACHE means dst is not cached in routing structures, still dst could be cached by routing users and used to produce noref instances. Signed-off-by: Julian Anastasov --- include/linux/skbuff.h | 14 ++++++++++++++ 1 files changed, 14 insertions(+), 0 deletions(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 821c7f4..4d422af 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -573,6 +573,20 @@ static inline void skb_dst_set(struct sk_buff *skb, struct dst_entry *dst) extern void skb_dst_set_noref(struct sk_buff *skb, struct dst_entry *dst); /** + * skb_dst_set_unref - sets skb dst, without a reference + * @skb: buffer + * @dst: dst entry + * + * Sets skb dst, assuming a reference was not taken on dst + * skb_dst_drop() should not dst_release() this dst + */ +static inline void skb_dst_set_unref(struct sk_buff *skb, struct dst_entry *dst) +{ + WARN_ON(!rcu_read_lock_held() && !rcu_read_lock_bh_held()); + skb->_skb_refdst = (unsigned long)dst | SKB_DST_NOREF; +} + +/** * skb_dst_is_noref - Test if skb dst isn't refcounted * @skb: buffer */ -- 1.7.3.4