1 files changed, 38 insertions, 20 deletions

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index fbf11562b54c..315a55d66079 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -205,7 +205,8 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 	if (hlimit < 0)
 		hlimit = ip6_dst_hoplimit(dst);
 
-	ip6_flow_hdr(hdr, tclass, fl6->flowlabel);
+	ip6_flow_hdr(hdr, tclass, ip6_make_flowlabel(net, skb, fl6->flowlabel,
+						     np->autoflowlabel));
 
 	hdr->payload_len = htons(seg_len);
 	hdr->nexthdr = proto;
@@ -219,7 +220,7 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 	skb->mark = sk->sk_mark;
 
 	mtu = dst_mtu(dst);
-	if ((skb->len <= mtu) || skb->local_df || skb_is_gso(skb)) {
+	if ((skb->len <= mtu) || skb->ignore_df || skb_is_gso(skb)) {
 		IP6_UPD_PO_STATS(net, ip6_dst_idev(skb_dst(skb)),
 			      IPSTATS_MIB_OUT, skb->len);
 		return NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL,
@@ -347,11 +348,11 @@ static bool ip6_pkt_too_big(const struct sk_buff *skb, unsigned int mtu)
 	if (skb->len <= mtu)
 		return false;
 
-	/* ipv6 conntrack defrag sets max_frag_size + local_df */
+	/* ipv6 conntrack defrag sets max_frag_size + ignore_df */
 	if (IP6CB(skb)->frag_max_size && IP6CB(skb)->frag_max_size > mtu)
 		return true;
 
-	if (skb->local_df)
+	if (skb->ignore_df)
 		return false;
 
 	if (skb_is_gso(skb) && skb_gso_network_seglen(skb) <= mtu)
@@ -537,6 +538,20 @@ static void ip6_copy_metadata(struct sk_buff *to, struct sk_buff *from)
 	skb_copy_secmark(to, from);
 }
 
+static void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt)
+{
+	static u32 ip6_idents_hashrnd __read_mostly;
+	u32 hash, id;
+
+	net_get_random_once(&ip6_idents_hashrnd, sizeof(ip6_idents_hashrnd));
+
+	hash = __ipv6_addr_jhash(&rt->rt6i_dst.addr, ip6_idents_hashrnd);
+	hash = __ipv6_addr_jhash(&rt->rt6i_src.addr, hash);
+
+	id = ip_idents_reserve(hash, 1);
+	fhdr->identification = htonl(id);
+}
+
 int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 {
 	struct sk_buff *frag;
@@ -559,7 +574,7 @@ int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 	/* We must not fragment if the socket is set to force MTU discovery
 	 * or if the skb it not generated by a local socket.
 	 */
-	if (unlikely(!skb->local_df && skb->len > mtu) ||
+	if (unlikely(!skb->ignore_df && skb->len > mtu) ||
 		     (IP6CB(skb)->frag_max_size &&
 		      IP6CB(skb)->frag_max_size > mtu)) {
 		if (skb->sk && dst_allfrag(skb_dst(skb)))
@@ -788,8 +803,8 @@ slow_path:
 		/*
 		 *	Copy a block of the IP datagram.
 		 */
-		if (skb_copy_bits(skb, ptr, skb_transport_header(frag), len))
-			BUG();
+		BUG_ON(skb_copy_bits(skb, ptr, skb_transport_header(frag),
+				     len));
 		left -= len;
 
 		fh->frag_off = htons(offset);
@@ -1142,6 +1157,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 	int err;
 	int offset = 0;
 	__u8 tx_flags = 0;
+	u32 tskey = 0;
 
 	if (flags&MSG_PROBE)
 		return 0;
@@ -1234,7 +1250,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
 			      sizeof(struct frag_hdr) : 0) +
 			     rt->rt6i_nfheader_len;
 
-		if (ip6_sk_local_df(sk))
+		if (ip6_sk_ignore_df(sk))
 			maxnonfragsize = sizeof(struct ipv6hdr) + IPV6_MAXPLEN;
 		else
 			maxnonfragsize = mtu;
@@ -1257,9 +1273,12 @@ emsgsize:
 		}
 	}
 
-	/* For UDP, check if TX timestamp is enabled */
-	if (sk->sk_type == SOCK_DGRAM)
+	if (sk->sk_type == SOCK_DGRAM || sk->sk_type == SOCK_RAW) {
 		sock_tx_timestamp(sk, &tx_flags);
+		if (tx_flags & SKBTX_ANY_SW_TSTAMP &&
+		    sk->sk_tsflags & SOF_TIMESTAMPING_OPT_ID)
+			tskey = sk->sk_tskey++;
+	}
 
 	/*
 	 * Let's try using as much space as possible.
@@ -1367,12 +1386,6 @@ alloc_new_skb:
 							   sk->sk_allocation);
 				if (unlikely(skb == NULL))
 					err = -ENOBUFS;
-				else {
-					/* Only the initial fragment
-					 * is time stamped.
-					 */
-					tx_flags = 0;
-				}
 			}
 			if (skb == NULL)
 				goto error;
@@ -1386,8 +1399,11 @@ alloc_new_skb:
 			skb_reserve(skb, hh_len + sizeof(struct frag_hdr) +
 				    dst_exthdrlen);
 
-			if (sk->sk_type == SOCK_DGRAM)
-				skb_shinfo(skb)->tx_flags = tx_flags;
+			/* Only the initial fragment is time stamped */
+			skb_shinfo(skb)->tx_flags = tx_flags;
+			tx_flags = 0;
+			skb_shinfo(skb)->tskey = tskey;
+			tskey = 0;
 
 			/*
 			 *	Find where to start putting bytes
@@ -1544,7 +1560,7 @@ int ip6_push_pending_frames(struct sock *sk)
 	}
 
 	/* Allow local fragmentation. */
-	skb->local_df = ip6_sk_local_df(sk);
+	skb->ignore_df = ip6_sk_ignore_df(sk);
 
 	*final_dst = fl6->daddr;
 	__skb_pull(skb, skb_network_header_len(skb));
@@ -1557,7 +1573,9 @@ int ip6_push_pending_frames(struct sock *sk)
 	skb_reset_network_header(skb);
 	hdr = ipv6_hdr(skb);
 
-	ip6_flow_hdr(hdr, np->cork.tclass, fl6->flowlabel);
+	ip6_flow_hdr(hdr, np->cork.tclass,
+		     ip6_make_flowlabel(net, skb, fl6->flowlabel,
+					np->autoflowlabel));
 	hdr->hop_limit = np->cork.hop_limit;
 	hdr->nexthdr = proto;
 	hdr->saddr = fl6->saddr;