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authorVincent Mailhol <mailhol.vincent@wanadoo.fr>2022-07-27 13:16:35 +0300
committerMarc Kleine-Budde <mkl@pengutronix.de>2022-07-28 12:44:30 +0300
commit90f942c5a6d775bad1be33ba214755314105da4a (patch)
tree42b5bcd668f47922a150f3e88f727f598db71386 /include/linux/can/dev.h
parent7fb48d25b5ce3bc488dbb019bf1736248181de9a (diff)
downloadlinux-90f942c5a6d775bad1be33ba214755314105da4a.tar.xz
can: dev: add generic function can_eth_ioctl_hwts()
Tools based on libpcap (such as tcpdump) expect the SIOCSHWTSTAMP ioctl call to be supported. This is also specified in the kernel doc [1]. The purpose of this ioctl is to toggle the hardware timestamps. Currently, CAN devices which support hardware timestamping have those always activated. can_eth_ioctl_hwts() is a dumb function that will always succeed when requested to set tx_type to HWTSTAMP_TX_ON or rx_filter to HWTSTAMP_FILTER_ALL. [1] Kernel doc: Timestamping, section 3.1 "Hardware Timestamping Implementation: Device Drivers" Link: https://docs.kernel.org/networking/timestamping.html#hardware-timestamping-implementation-device-drivers Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr> Link: https://lore.kernel.org/all/20220727101641.198847-9-mailhol.vincent@wanadoo.fr Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'include/linux/can/dev.h')
-rw-r--r--include/linux/can/dev.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h
index 752bd45d8ebf..c3e50e537e39 100644
--- a/include/linux/can/dev.h
+++ b/include/linux/can/dev.h
@@ -163,6 +163,7 @@ struct can_priv *safe_candev_priv(struct net_device *dev);
int open_candev(struct net_device *dev);
void close_candev(struct net_device *dev);
int can_change_mtu(struct net_device *dev, int new_mtu);
+int can_eth_ioctl_hwts(struct net_device *netdev, struct ifreq *ifr, int cmd);
int can_ethtool_op_get_ts_info_hwts(struct net_device *dev,
struct ethtool_ts_info *info);