From: Eric Dumazet <edumazet@google.com>
Date: Mon, 16 Mar 2015 04:12:12 +0000 (-0700)
Subject: net: add sk_fullsock() helper
X-Git-Url: https://git.stricted.de/?p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git;a=commitdiff_plain;h=1b37e0936815038a348230db69eaf00d2ecf4029

net: add sk_fullsock() helper

We have many places where we want to check if a socket is
not a timewait or request socket. Use a helper to avoid
hard coding this.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

[backported from net-next 1d0ab253872cdd3d8e7913f59c266c7fd01771d0]
[lorenzo@google.com: removed TCPF_NEW_SYN_RECV, and added a comment to add it back.]

Signed-off-by: Lorenzo Colitti <lorenzo@google.com>

Bug: 24163529
Change-Id: Ibf09017e1ab00af5e6925273117c335d7f515d73
---

diff --git a/include/net/sock.h b/include/net/sock.h
index 25001eeba49..8fda4597ceb 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -77,6 +77,7 @@
 #include <linux/atomic.h>
 #include <net/dst.h>
 #include <net/checksum.h>
+#include <net/tcp_states.h>
 
 #define TCP_BACKLOG_SCALE 4
 
@@ -2286,6 +2287,15 @@ static inline struct sock *skb_steal_sock(struct sk_buff *skb)
 	return NULL;
 }
 
+/* This helper checks if a socket is a full socket,
+ * ie _not_ a timewait or request socket.
+ * TODO: Check for TCPF_NEW_SYN_RECV when that starts to exist.
+ */
+static inline bool sk_fullsock(const struct sock *sk)
+{
+	return (1 << sk->sk_state) & ~(TCPF_TIME_WAIT);
+}
+
 extern void sock_enable_timestamp(struct sock *sk, int flag);
 extern int sock_get_timestamp(struct sock *, struct timeval __user *);
 extern int sock_get_timestampns(struct sock *, struct timespec __user *);