unix_diag: Receive queue lenght NLA

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 13 insertions, 0 deletions

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 @@ rtattr_failure:
         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;