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| author | Willem de Bruijn <willemb@google.com> | 2015-01-30 13:29:31 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-02-02 18:46:51 -0800 |
| commit | 49ca0d8bfaf3bc46d5eef60ce67b00eb195bd392 (patch) | |
| tree | d2f55a32923f6d91fcb2e0d0e0b6d2d4eb6f9abd /net/ipv6 | |
| parent | 9766e97af1b901ffbb36fcc648e50626d926bb24 (diff) | |
| download | blackbird-op-linux-49ca0d8bfaf3bc46d5eef60ce67b00eb195bd392.tar.gz blackbird-op-linux-49ca0d8bfaf3bc46d5eef60ce67b00eb195bd392.zip | |
net-timestamp: no-payload option
Add timestamping option SOF_TIMESTAMPING_OPT_TSONLY. For transmit
timestamps, this loops timestamps on top of empty packets.
Doing so reduces the pressure on SO_RCVBUF. Payload inspection and
cmsg reception (aside from timestamps) are no longer possible. This
works together with a follow on patch that allows administrators to
only allow tx timestamping if it does not loop payload or metadata.
Signed-off-by: Willem de Bruijn <willemb@google.com>
----
Changes (rfc -> v1)
- add documentation
- remove unnecessary skb->len test (thanks to Richard Cochran)
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/datagram.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c index 49f5e73db122..c215be70cac0 100644 --- a/net/ipv6/datagram.c +++ b/net/ipv6/datagram.c @@ -369,7 +369,7 @@ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) serr = SKB_EXT_ERR(skb); - if (sin) { + if (sin && skb->len) { const unsigned char *nh = skb_network_header(skb); sin->sin6_family = AF_INET6; sin->sin6_flowinfo = 0; @@ -394,8 +394,7 @@ int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len) memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err)); sin = &errhdr.offender; memset(sin, 0, sizeof(*sin)); - - if (serr->ee.ee_origin != SO_EE_ORIGIN_LOCAL) { + if (serr->ee.ee_origin != SO_EE_ORIGIN_LOCAL && skb->len) { sin->sin6_family = AF_INET6; if (np->rxopt.all) { if (serr->ee.ee_origin != SO_EE_ORIGIN_ICMP && |
