[NET]: Introduce SIOCGSTAMPNS ioctl to get timestamps with nanosec resolution

Now network timestamps use ktime_t infrastructure, we can add a new
ioctl() SIOCGSTAMPNS command to get timestamps in 'struct timespec'.
User programs can thus access to nanosecond resolution.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
CC: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index cf358c84c440..df41856fc603 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -755,6 +755,9 @@ int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                 case SIOCGSTAMP:
                         err = sock_get_timestamp(sk, (struct timeval __user *)arg);
                         break;
+                case SIOCGSTAMPNS:
+                        err = sock_get_timestampns(sk, (struct timespec __user *)arg);
+                        break;
                 case SIOCADDRT:
                 case SIOCDELRT:
                 case SIOCRTMSG: