[PATCH v4 net-next 1/7] net: define receive timestamp filter for NTP

[Miroslav Lichvar]

Add HWTSTAMP_FILTER_NTP_ALL to the hwtstamp_rx_filters enum for
timestamping of NTP packets. There is currently only one driver
(phyter) that could support it directly.

CC: Richard Cochran <richardcoch...@gmail.com>
CC: Willem de Bruijn <will...@google.com>
Signed-off-by: Miroslav Lichvar <mlich...@redhat.com>
---
 include/uapi/linux/net_tstamp.h | 3 +++
 net/core/dev_ioctl.c            | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/include/uapi/linux/net_tstamp.h b/include/uapi/linux/net_tstamp.h
index 464dcca..0749fb1 100644
--- a/include/uapi/linux/net_tstamp.h
+++ b/include/uapi/linux/net_tstamp.h
@@ -125,6 +125,9 @@ enum hwtstamp_rx_filters {
        HWTSTAMP_FILTER_PTP_V2_SYNC,
        /* PTP v2/802.AS1, any layer, Delay_req packet */
        HWTSTAMP_FILTER_PTP_V2_DELAY_REQ,
+
+       /* NTP, UDP, all versions and packet modes */
+       HWTSTAMP_FILTER_NTP_ALL,
 };
 
 #endif /* _NET_TIMESTAMPING_H */
diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c
index b94b1d2..8f036a7 100644
--- a/net/core/dev_ioctl.c
+++ b/net/core/dev_ioctl.c
@@ -227,6 +227,8 @@ static int net_hwtstamp_validate(struct ifreq *ifr)
        case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
                rx_filter_valid = 1;
                break;
+       case HWTSTAMP_FILTER_NTP_ALL:
+               break;
        }
 
        if (!tx_type_valid || !rx_filter_valid)
-- 
2.9.3