netdev - [PATCH net] packet: restore packet statistics tp

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Message-Id: <1376944822-30454-1-git-send-email-willemb@google.com>
Date:	Mon, 19 Aug 2013 16:40:22 -0400
From:	Willem de Bruijn <willemb@...gle.com>
To:	davem@...emloft.net, dborkman@...hat.com, netdev@...r.kernel.org,
	sergei.shtylyov@...entembedded.com
Cc:	Willem de Bruijn <willemb@...gle.com>
Subject: [PATCH net] packet: restore packet statistics tp_packets to include drops

getsockopt PACKET_STATISTICS returns tp_packets + tp_drops. Commit
ee80fbf301 ("packet: account statistics only in tpacket_stats_u")
cleaned up the getsockopt PACKET_STATISTICS code.
This also changed semantics. Historically, tp_packets included
tp_drops on return. The commit removed the line that adds tp_drops
into tp_packets.

This patch reinstates the old semantics.

Signed-off-by: Willem de Bruijn <willemb@...gle.com>

---

v2: incorporated commit summary by request. no code changes
---
 net/packet/af_packet.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 6c53dd9..1fdf9ab 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -3215,9 +3215,11 @@ static int packet_getsockopt(struct socket *sock, int level, int optname,
 
 		if (po->tp_version == TPACKET_V3) {
 			lv = sizeof(struct tpacket_stats_v3);
+			st.stats3.tp_packets += st.stats3.tp_drops;
 			data = &st.stats3;
 		} else {
 			lv = sizeof(struct tpacket_stats);
+			st.stats1.tp_packets += st.stats1.tp_drops;
 			data = &st.stats1;
 		}
 
-- 
1.8.3

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