linux/net/l2tp
Soheil Hassas Yeganeh c14ac9451c sock: enable timestamping using control messages
Currently, SOL_TIMESTAMPING can only be enabled using setsockopt.
This is very costly when users want to sample writes to gather
tx timestamps.

Add support for enabling SO_TIMESTAMPING via control messages by
using tsflags added in `struct sockcm_cookie` (added in the previous
patches in this series) to set the tx_flags of the last skb created in
a sendmsg. With this patch, the timestamp recording bits in tx_flags
of the skbuff is overridden if SO_TIMESTAMPING is passed in a cmsg.

Please note that this is only effective for overriding the recording
timestamps flags. Users should enable timestamp reporting (e.g.,
SOF_TIMESTAMPING_SOFTWARE | SOF_TIMESTAMPING_OPT_ID) using
socket options and then should ask for SOF_TIMESTAMPING_TX_*
using control messages per sendmsg to sample timestamps for each
write.

Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-04 15:50:30 -04:00
..
Kconfig l2tp: Call udp_sock_create 2014-07-14 16:12:15 -07:00
l2tp_core.c l2tp: protect tunnel->del_work by ref_count 2015-09-28 22:39:10 -07:00
l2tp_core.h l2tp: auto load type modules 2015-09-25 12:27:22 -07:00
l2tp_debugfs.c ipv6: make lookups simpler and faster 2013-10-09 00:01:25 -04:00
l2tp_eth.c l2tp: auto load type modules 2015-09-25 12:27:22 -07:00
l2tp_ip6.c sock: enable timestamping using control messages 2016-04-04 15:50:30 -04:00
l2tp_ip.c l2tp: auto load IP modules 2015-09-25 12:27:22 -07:00
l2tp_netlink.c l2tp: Fix error creating L2TP tunnels 2016-02-17 15:34:47 -05:00
l2tp_ppp.c l2tp: rely on ppp layer for skb scrubbing 2016-01-04 16:45:24 -05:00
Makefile