Merge tag 'samsung-defconfig-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git...

[karo-tx-linux.git] / net / core / skbuff.c

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index cd4ba8c6b6091651403cf74de8c60ccf69aa3e7b..9f781092fda9cb8cac22b0743b4bc7666a3bd91a 100644 (file)
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -3694,6 +3694,15 @@ static void sock_rmem_free(struct sk_buff *skb)
        atomic_sub(skb->truesize, &sk->sk_rmem_alloc);
 }
 
+static void skb_set_err_queue(struct sk_buff *skb)
+{
+       /* pkt_type of skbs received on local sockets is never PACKET_OUTGOING.
+        * So, it is safe to (mis)use it to mark skbs on the error queue.
+        */
+       skb->pkt_type = PACKET_OUTGOING;
+       BUILD_BUG_ON(PACKET_OUTGOING == 0);
+}
+
 /*
  * Note: We dont mem charge error packets (no sk_forward_alloc changes)
  */
@@ -3707,6 +3716,7 @@ int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb)
        skb->sk = sk;
        skb->destructor = sock_rmem_free;
        atomic_add(skb->truesize, &sk->sk_rmem_alloc);
+       skb_set_err_queue(skb);
 
        /* before exiting rcu section, make sure dst is refcounted */
        skb_dst_force(skb);
@@ -3783,16 +3793,20 @@ EXPORT_SYMBOL(skb_clone_sk);
 
 static void __skb_complete_tx_timestamp(struct sk_buff *skb,
                                        struct sock *sk,
-                                       int tstype)
+                                       int tstype,
+                                       bool opt_stats)
 {
        struct sock_exterr_skb *serr;
        int err;
 
+       BUILD_BUG_ON(sizeof(struct sock_exterr_skb) > sizeof(skb->cb));
+
        serr = SKB_EXT_ERR(skb);
        memset(serr, 0, sizeof(*serr));
        serr->ee.ee_errno = ENOMSG;
        serr->ee.ee_origin = SO_EE_ORIGIN_TIMESTAMPING;
        serr->ee.ee_info = tstype;
+       serr->opt_stats = opt_stats;
        if (sk->sk_tsflags & SOF_TIMESTAMPING_OPT_ID) {
                serr->ee.ee_data = skb_shinfo(skb)->tskey;
                if (sk->sk_protocol == IPPROTO_TCP &&
@@ -3833,7 +3847,7 @@ void skb_complete_tx_timestamp(struct sk_buff *skb,
         */
        if (likely(atomic_inc_not_zero(&sk->sk_refcnt))) {
                *skb_hwtstamps(skb) = *hwtstamps;
-               __skb_complete_tx_timestamp(skb, sk, SCM_TSTAMP_SND);
+               __skb_complete_tx_timestamp(skb, sk, SCM_TSTAMP_SND, false);
                sock_put(sk);
        }
 }
@@ -3844,7 +3858,7 @@ void __skb_tstamp_tx(struct sk_buff *orig_skb,
                     struct sock *sk, int tstype)
 {
        struct sk_buff *skb;
-       bool tsonly;
+       bool tsonly, opt_stats = false;
 
        if (!sk)
                return;
@@ -3857,9 +3871,10 @@ void __skb_tstamp_tx(struct sk_buff *orig_skb,
 #ifdef CONFIG_INET
                if ((sk->sk_tsflags & SOF_TIMESTAMPING_OPT_STATS) &&
                    sk->sk_protocol == IPPROTO_TCP &&
-                   sk->sk_type == SOCK_STREAM)
+                   sk->sk_type == SOCK_STREAM) {
                        skb = tcp_get_timestamping_opt_stats(sk);
-               else
+                       opt_stats = true;
+               } else
 #endif
                        skb = alloc_skb(0, GFP_ATOMIC);
        } else {
@@ -3878,7 +3893,7 @@ void __skb_tstamp_tx(struct sk_buff *orig_skb,
        else
                skb->tstamp = ktime_get_real();
 
-       __skb_complete_tx_timestamp(skb, sk, tstype);
+       __skb_complete_tx_timestamp(skb, sk, tstype, opt_stats);
 }
 EXPORT_SYMBOL_GPL(__skb_tstamp_tx);