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Message-Id: <1423715535-884-3-git-send-email-eyal.birger@gmail.com> Date: Thu, 12 Feb 2015 06:32:14 +0200 From: Eyal Birger <eyal.birger@...il.com> To: davem@...emloft.net Cc: netdev@...r.kernel.org, edumazet@...gle.com, shmulik.ladkani@...il.com, Eyal Birger <eyal.birger@...il.com> Subject: [PATCH net-next v2 2/3] net: use skb->priority for overloading skb->dropcount and skb->reserved_tailroom instead of skb->mark Commit 977750076d98 ("af_packet: add interframe drop cmsg (v6)") unionized skb->mark and skb->dropcount in order to allow recording of the socket drop count while maintaining struct sk_buff size. In order to allow for the skb->mark to be fetched by user-space code it needs to be detached from this union; skb->priority is used instead. Signed-off-by: Eyal Birger <eyal.birger@...il.com> ---- The purpose of overloading skb->priority is solely for retaining struct sk_buff size; skb->priority is not used after the skb queued to the socket and has the same guarentee of not being shared as skb->mark. --- include/linux/skbuff.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 1bb36ed..23f1a94 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -621,7 +621,7 @@ struct sk_buff { __u16 csum_offset; }; }; - __u32 priority; + __u32 mark; int skb_iif; __u32 hash; __be16 vlan_proto; @@ -636,7 +636,7 @@ struct sk_buff { __u32 secmark; #endif union { - __u32 mark; + __u32 priority; __u32 dropcount; __u32 reserved_tailroom; }; -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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