tun: Update classid on packet injection

This patch makes tun update its socket classid every time we
inject a packet into the network stack.  This is so that any
updates made by the admin to the process writing packets to
tun is effected.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 97b25533e5fb..8793c2bf7f15 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -526,6 +526,8 @@ static inline struct sk_buff *tun_alloc_skb(struct tun_struct *tun,
         struct sk_buff *skb;
         int err;
 
+        sock_update_classid(sk);
+
         /* Under a page?  Don't bother with paged skb. */
         if (prepad + len < PAGE_SIZE || !linear)
                 linear = len;
diff --git a/net/core/sock.c b/net/core/sock.c
index a05ae7f9771e..37fe9b6adade 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1064,6 +1064,7 @@ void sock_update_classid(struct sock *sk)
         if (classid && classid != sk->sk_classid)
                 sk->sk_classid = classid;
 }
+EXPORT_SYMBOL(sock_update_classid);
 #endif
 
 /**