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authorWillem de Bruijn <willemb@google.com>2015-01-30 13:29:31 -0500
committerDavid S. Miller <davem@davemloft.net>2015-02-02 18:46:51 -0800
commit49ca0d8bfaf3bc46d5eef60ce67b00eb195bd392 (patch)
treed2f55a32923f6d91fcb2e0d0e0b6d2d4eb6f9abd /net/rxrpc
parent9766e97af1b901ffbb36fcc648e50626d926bb24 (diff)
downloadlwn-49ca0d8bfaf3bc46d5eef60ce67b00eb195bd392.tar.gz
lwn-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/rxrpc')
-rw-r--r--net/rxrpc/ar-error.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/net/rxrpc/ar-error.c b/net/rxrpc/ar-error.c
index 74c0fcd36838..5394b6be46ec 100644
--- a/net/rxrpc/ar-error.c
+++ b/net/rxrpc/ar-error.c
@@ -42,6 +42,11 @@ void rxrpc_UDP_error_report(struct sock *sk)
_leave("UDP socket errqueue empty");
return;
}
+ if (!skb->len) {
+ _leave("UDP empty message");
+ kfree_skb(skb);
+ return;
+ }
rxrpc_new_skb(skb);