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authorAnders Berggren <anders@halon.se>2011-02-28 12:32:11 -0800
committerDavid S. Miller <davem@davemloft.net>2011-02-28 12:32:11 -0800
commita693e69897e7811e2790295f38a0ce3a92c4b45c (patch)
tree2c3cd9d7288821a7b71dc7f4481462150f41de63 /net/ipv6
parenteaaa3a7c4da2bdc48e536bb750860253150cb931 (diff)
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: Anders Berggren <anders@halon.se> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/ip6_output.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 25a2647f994..065b3f7614f 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -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 @@ 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;
@@ -1317,6 +1331,9 @@ alloc_new_skb:
/* 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
*/