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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 /include/uapi | |
| parent | 9766e97af1b901ffbb36fcc648e50626d926bb24 (diff) | |
| download | linux-stable-49ca0d8bfaf3bc46d5eef60ce67b00eb195bd392.tar.gz linux-stable-49ca0d8bfaf3bc46d5eef60ce67b00eb195bd392.tar.bz2 linux-stable-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 'include/uapi')
| -rw-r--r-- | include/uapi/linux/net_tstamp.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/uapi/linux/net_tstamp.h b/include/uapi/linux/net_tstamp.h index edbc888ceb51..6d1abea9746e 100644 --- a/include/uapi/linux/net_tstamp.h +++ b/include/uapi/linux/net_tstamp.h @@ -24,8 +24,9 @@ enum { SOF_TIMESTAMPING_TX_SCHED = (1<<8), SOF_TIMESTAMPING_TX_ACK = (1<<9), SOF_TIMESTAMPING_OPT_CMSG = (1<<10), + SOF_TIMESTAMPING_OPT_TSONLY = (1<<11), - SOF_TIMESTAMPING_LAST = SOF_TIMESTAMPING_OPT_CMSG, + SOF_TIMESTAMPING_LAST = SOF_TIMESTAMPING_OPT_TSONLY, SOF_TIMESTAMPING_MASK = (SOF_TIMESTAMPING_LAST - 1) | SOF_TIMESTAMPING_LAST }; |