From 7876800ac5adfaadb0e99473b4b2dd735fa6c90f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Diego=20Elio=20=27Flameeyes=27=20Petten=C3=B2?=
 <flameeyes@gmail.com>
Date: Fri, 3 Sep 2010 03:47:03 +0000
Subject: [PATCH] --- yaml --- r: 214348 b: refs/heads/master c:
 65040c33ee8d0199ab7686402bffdbf9e1e26cbe h: refs/heads/master v: v3

---
 [refs]                  |  2 +-
 trunk/net/sctp/socket.c | 35 ++++++++++++++++++++++++++++++++++-
 2 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index 7b73f867a8be..730f965a1b60 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 2edae08e5b75269855fef3c74fe4292c066e7c33
+refs/heads/master: 65040c33ee8d0199ab7686402bffdbf9e1e26cbe
diff --git a/trunk/net/sctp/socket.c b/trunk/net/sctp/socket.c
index cf6dcc908b88..6a691d84aef4 100644
--- a/trunk/net/sctp/socket.c
+++ b/trunk/net/sctp/socket.c
@@ -3592,7 +3592,40 @@ SCTP_STATIC struct sock *sctp_accept(struct sock *sk, int flags, int *err)
 /* The SCTP ioctl handler. */
 SCTP_STATIC int sctp_ioctl(struct sock *sk, int cmd, unsigned long arg)
 {
-	return -ENOIOCTLCMD;
+	int rc = -ENOTCONN;
+
+	sctp_lock_sock(sk);
+
+	/*
+	 * SEQPACKET-style sockets in LISTENING state are valid, for
+	 * SCTP, so only discard TCP-style sockets in LISTENING state.
+	 */
+	if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))
+		goto out;
+
+	switch (cmd) {
+	case SIOCINQ: {
+		struct sk_buff *skb;
+		unsigned int amount = 0;
+
+		skb = skb_peek(&sk->sk_receive_queue);
+		if (skb != NULL) {
+			/*
+			 * We will only return the amount of this packet since
+			 * that is all that will be read.
+			 */
+			amount = skb->len;
+		}
+		rc = put_user(amount, (int __user *)arg);
+	}
+		break;
+	default:
+		rc = -ENOIOCTLCMD;
+		break;
+	}
+out:
+	sctp_release_sock(sk);
+	return rc;
 }
 
 /* This is the function which gets called during socket creation to