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Commit a693e698 authored by Anders Berggren's avatar Anders Berggren Committed by David S. Miller
Browse files

net: TX timestamps for IPv6 UDP packets 



Enabling TX timestamps (SO_TIMESTAMPING) for IPv6 UDP packets, in
the same fashion as for IPv4. Necessary in order for NICs such as
Intel 82580 to timestamp IPv6 packets.

Signed-off-by: default avatarAnders Berggren <anders@halon.se>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent eaaa3a7c

net/ipv6/ip6_output.c

+17 −0
Original line number Diff line number Diff line
@@ -1118,6 +1118,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to, 
	int err;

	int offset = 0;

	int csummode = CHECKSUM_NONE;

	__u8 tx_flags = 0;



	if (flags&MSG_PROBE)

		return 0;
@@ -1202,6 +1203,13 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to, 
		}

	}



	/* For UDP, check if TX timestamp is enabled */

	if (sk->sk_type == SOCK_DGRAM) {

		err = sock_tx_timestamp(sk, &tx_flags);

		if (err)

			goto error;

	}



	/*

	 * Let's try using as much space as possible.

	 * Use MTU if total length of the message fits into the MTU.
@@ -1306,6 +1314,12 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to, 
							   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;
@@ -1317,6 +1331,9 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to, 
			/* reserve for fragmentation */

			skb_reserve(skb, hh_len+sizeof(struct frag_hdr));



			if (sk->sk_type == SOCK_DGRAM)

				skb_shinfo(skb)->tx_flags = tx_flags;



			/*

			 *	Find where to start putting bytes

			 */