From cbf391958afb9b82c72324a15891eb3102200085 Mon Sep 17 00:00:00 2001
From: Pavel Emelyanov <xemul@parallels.com>
Date: Thu, 15 Dec 2011 02:46:31 +0000
Subject: [PATCH] unix_diag: Receive queue lenght NLA
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/linux/unix_diag.h | 2 ++
net/unix/diag.c | 13 +++++++++++++
2 files changed, 15 insertions(+)
diff --git a/include/linux/unix_diag.h b/include/linux/unix_diag.h
index 03ffb7de15b6..3f7afb007d70 100644
--- a/include/linux/unix_diag.h
+++ b/include/linux/unix_diag.h
@@ -15,6 +15,7 @@ struct unix_diag_req {
#define UDIAG_SHOW_VFS 0x00000002 /* show VFS inode info */
#define UDIAG_SHOW_PEER 0x00000004 /* show peer socket info */
#define UDIAG_SHOW_ICONS 0x00000008 /* show pending connections */
+#define UDIAG_SHOW_RQLEN 0x00000010 /* show skb receive queue len */
struct unix_diag_msg {
__u8 udiag_family;
@@ -31,6 +32,7 @@ enum {
UNIX_DIAG_VFS,
UNIX_DIAG_PEER,
UNIX_DIAG_ICONS,
+ UNIX_DIAG_RQLEN,
UNIX_DIAG_MAX,
};
diff --git a/net/unix/diag.c b/net/unix/diag.c
index 24c7a65d9cb1..a5c4aab0380d 100644
--- a/net/unix/diag.c
+++ b/net/unix/diag.c
@@ -98,6 +98,15 @@ static int sk_diag_dump_icons(struct sock *sk, struct sk_buff *nlskb)
return -EMSGSIZE;
}
+static int sk_diag_show_rqlen(struct sock *sk, struct sk_buff *nlskb)
+{
+ RTA_PUT_U32(nlskb, UNIX_DIAG_RQLEN, sk->sk_receive_queue.qlen);
+ return 0;
+
+rtattr_failure:
+ return -EMSGSIZE;
+}
+
static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct unix_diag_req *req,
u32 pid, u32 seq, u32 flags, int sk_ino)
{
@@ -132,6 +141,10 @@ static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct unix_diag_r
sk_diag_dump_icons(sk, skb))
goto nlmsg_failure;
+ if ((req->udiag_show & UDIAG_SHOW_RQLEN) &&
+ sk_diag_show_rqlen(sk, skb))
+ goto nlmsg_failure;
+
nlh->nlmsg_len = skb_tail_pointer(skb) - b;
return skb->len;
--
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