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ntp: always try to enable SW timestamping on Linux

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Request SW timestamps with SCM_TIMESTAMPING even if HW timestamping is
enabled. This replaces SCM_TIMESTAMP(NS) for RX and enables TX SW
timestamping on interfaces that don't support HW timestamping (or don't
have it enabled) if another interface has HW timestamping enabled.
This commit is contained in:
Miroslav Lichvar 2017-06-05 18:47:05 +02:00
parent b712c100d7
commit b799cfd1c4
2 changed files with 25 additions and 25 deletions
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17
ntp_io.c
View file

@ -204,21 +204,18 @@ prepare_socket(int family, int port_number, int client_only)
/* Don't quit - we might survive anyway */
}
#ifdef SO_TIMESTAMP
/* Enable receiving of timestamp control messages */
/* Enable kernel/HW timestamping of packets */
#ifdef HAVE_LINUX_TIMESTAMPING
if (!NIO_Linux_SetTimestampSocketOptions(sock_fd, client_only, &events))
#endif
#ifdef SO_TIMESTAMPNS
/* Try nanosecond resolution first */
if (setsockopt(sock_fd, SOL_SOCKET, SO_TIMESTAMPNS, (char *)&on_off, sizeof(on_off)) < 0)
#endif
if (setsockopt(sock_fd, SOL_SOCKET, SO_TIMESTAMP, (char *)&on_off, sizeof(on_off)) < 0) {
#ifdef SO_TIMESTAMP
if (setsockopt(sock_fd, SOL_SOCKET, SO_TIMESTAMP, (char *)&on_off, sizeof(on_off)) < 0)
LOG(LOGS_ERR, "Could not set %s socket option", "SO_TIMESTAMP");
/* Don't quit - we might survive anyway */
}
#endif
#ifdef HAVE_LINUX_TIMESTAMPING
NIO_Linux_SetTimestampSocketOptions(sock_fd, client_only, &events);
#endif
;
#ifdef IP_FREEBIND
/* Allow binding to address that doesn't exist yet */

25
ntp_io_linux.c
View file

@ -280,12 +280,12 @@ NIO_Linux_Initialise(void)
break;
}
if (hwts) {
ts_flags = SOF_TIMESTAMPING_RAW_HARDWARE | SOF_TIMESTAMPING_RX_HARDWARE;
ts_tx_flags = SOF_TIMESTAMPING_TX_HARDWARE;
} else {
ts_flags = SOF_TIMESTAMPING_SOFTWARE | SOF_TIMESTAMPING_RX_SOFTWARE;
ts_tx_flags = SOF_TIMESTAMPING_TX_SOFTWARE;
if (hwts) {
ts_flags |= SOF_TIMESTAMPING_RAW_HARDWARE | SOF_TIMESTAMPING_RX_HARDWARE;
ts_tx_flags |= SOF_TIMESTAMPING_TX_HARDWARE;
}
/* Enable IP_PKTINFO in messages looped back to the error queue */
@ -504,10 +504,7 @@ NIO_Linux_ProcessMessage(NTP_Remote_Address *remote_addr, NTP_Local_Address *loc
memcpy(&ts3, CMSG_DATA(cmsg), sizeof (ts3));
if (!UTI_IsZeroTimespec(&ts3.ts[0])) {
LCL_CookTime(&ts3.ts[0], &local_ts->ts, &local_ts->err);
local_ts->source = NTP_TS_KERNEL;
} else if (!UTI_IsZeroTimespec(&ts3.ts[2])) {
if (!UTI_IsZeroTimespec(&ts3.ts[2])) {
iface = get_interface(local_addr->if_index);
if (iface) {
process_hw_timestamp(iface, &ts3.ts[2], local_ts, !is_tx ? length : 0,
@ -516,6 +513,12 @@ NIO_Linux_ProcessMessage(NTP_Remote_Address *remote_addr, NTP_Local_Address *loc
DEBUG_LOG("HW clock not found for interface %d", local_addr->if_index);
}
}
if (local_ts->source == NTP_TS_DAEMON && !UTI_IsZeroTimespec(&ts3.ts[0]) &&
(!is_tx || UTI_IsZeroTimespec(&ts3.ts[2]))) {
LCL_CookTime(&ts3.ts[0], &local_ts->ts, &local_ts->err);
local_ts->source = NTP_TS_KERNEL;
}
}
if ((cmsg->cmsg_level == SOL_IP && cmsg->cmsg_type == IP_RECVERR) ||
@ -555,9 +558,9 @@ NIO_Linux_ProcessMessage(NTP_Remote_Address *remote_addr, NTP_Local_Address *loc
iface->l2_udp6_ntp_start = l2_length - length;
}
/* Drop the message if HW timestamp is missing or its processing failed */
if ((ts_flags & SOF_TIMESTAMPING_RAW_HARDWARE) && local_ts->source != NTP_TS_HARDWARE) {
DEBUG_LOG("Missing HW timestamp");
/* Drop the message if it has no timestamp or its processing failed */
if (local_ts->source == NTP_TS_DAEMON) {
DEBUG_LOG("Missing TX timestamp");
return 1;
}