netdev - [PATCH v2 net-next 07/11] sock_diag: add SK_MEMINFO

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Date:	Fri,  1 Apr 2016 08:52:18 -0700
From:	Eric Dumazet <edumazet@...gle.com>
To:	"David S . Miller" <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Tom Herbert <tom@...bertland.com>,
	Willem de Bruijn <willemb@...gle.com>,
	Neal Cardwell <ncardwell@...gle.com>,
	Maciej Żenczykowski <maze@...gle.com>
Subject: [PATCH v2 net-next 07/11] sock_diag: add SK_MEMINFO_DROPS

Reporting sk_drops to user space was available for UDP
sockets using /proc interface.

Add this to sock_diag, so that we can have the same information
available to ss users, and we'll be able to add sk_drops
indications for TCP sockets as well.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 include/uapi/linux/sock_diag.h | 1 +
 net/core/sock_diag.c           | 1 +
 2 files changed, 2 insertions(+)

diff --git a/include/uapi/linux/sock_diag.h b/include/uapi/linux/sock_diag.h
index bae2d80034d4..7ff505d8a47b 100644
--- a/include/uapi/linux/sock_diag.h
+++ b/include/uapi/linux/sock_diag.h
@@ -20,6 +20,7 @@ enum {
 	SK_MEMINFO_WMEM_QUEUED,
 	SK_MEMINFO_OPTMEM,
 	SK_MEMINFO_BACKLOG,
+	SK_MEMINFO_DROPS,
 
 	SK_MEMINFO_VARS,
 };
diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c
index a996ce8c8fb2..ca9e35bbe13c 100644
--- a/net/core/sock_diag.c
+++ b/net/core/sock_diag.c
@@ -67,6 +67,7 @@ int sock_diag_put_meminfo(struct sock *sk, struct sk_buff *skb, int attrtype)
 	mem[SK_MEMINFO_WMEM_QUEUED] = sk->sk_wmem_queued;
 	mem[SK_MEMINFO_OPTMEM] = atomic_read(&sk->sk_omem_alloc);
 	mem[SK_MEMINFO_BACKLOG] = sk->sk_backlog.len;
+	mem[SK_MEMINFO_DROPS] = atomic_read(&sk->sk_drops);
 
 	return nla_put(skb, attrtype, sizeof(mem), &mem);
 }
-- 
2.8.0.rc3.226.g39d4020