net_tstamp: Add SIOCGHWTSTAMP ioctl to match SIOCSHWTSTAMP (fd468c74) · Commits · 戴 / test

Documentation/networking/timestamping.txt

+7 −2

Original line number	Diff line number	Diff line
		@@ -85,7 +85,7 @@ Filled in if SOF_TIMESTAMPING_SYS_HARDWARE is set. Requires support
		by the network device and will be empty without that support.


		SIOCSHWTSTAMP:
		SIOCSHWTSTAMP, SIOCGHWTSTAMP:

		Hardware time stamping must also be initialized for each device driver
		that is expected to do hardware time stamping. The parameter is defined in
		@@ -115,6 +115,10 @@ Only a processes with admin rights may change the configuration. User
		space is responsible to ensure that multiple processes don't interfere
		with each other and that the settings are reset.

		Any process can read the actual configuration by passing this
		structure to ioctl(SIOCGHWTSTAMP) in the same way. However, this has
		not been implemented in all drivers.

		/* possible values for hwtstamp_config->tx_type */
		enum {
		/*
		@@ -157,7 +161,8 @@ DEVICE IMPLEMENTATION

		A driver which supports hardware time stamping must support the
		SIOCSHWTSTAMP ioctl and update the supplied struct hwtstamp_config with
		the actual values as described in the section on SIOCSHWTSTAMP.
		the actual values as described in the section on SIOCSHWTSTAMP. It
		should also support SIOCGHWTSTAMP.

		Time stamps for received packets must be stored in the skb. To get a pointer
		to the shared time stamp structure of the skb call skb_hwtstamps(). Then

+7 −7

Original line number	Diff line number	Diff line
		@@ -26,17 +26,17 @@ enum {
		};

		/**
		* struct hwtstamp_config - %SIOCSHWTSTAMP parameter
		* struct hwtstamp_config - %SIOCGHWTSTAMP and %SIOCSHWTSTAMP parameter
		*
		* @flags: no flags defined right now, must be zero
		* @flags: no flags defined right now, must be zero for %SIOCSHWTSTAMP
		* @tx_type: one of HWTSTAMP_TX_*
		* @rx_filter: one of HWTSTAMP_FILTER_*
		*
		* %SIOCSHWTSTAMP expects a &struct ifreq with a ifr_data pointer to
		* this structure. If the driver or hardware does not support the
		* requested @rx_filter value, the driver may use a more general
		* filter mode. In this case @rx_filter will indicate the actual mode
		* on return.
		* %SIOCGHWTSTAMP and %SIOCSHWTSTAMP expect a &struct ifreq with a
		* ifr_data pointer to this structure. For %SIOCSHWTSTAMP, if the
		* driver or hardware does not support the requested @rx_filter value,
		* the driver may use a more general filter mode. In this case
		* @rx_filter will indicate the actual mode on return.
		*/
		struct hwtstamp_config {
		int flags;

+2 −1

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		@@ -125,7 +125,8 @@
		#define SIOCBRDELIF 0x89a3 /* remove interface from bridge */

		/* hardware time stamping: parameters in linux/net_tstamp.h */
		#define SIOCSHWTSTAMP 0x89b0
		#define SIOCSHWTSTAMP 0x89b0 /* set and get config */
		#define SIOCGHWTSTAMP 0x89b1 /* get config */

		/* Device private ioctl calls */

+2 −0

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		@@ -327,6 +327,7 @@ static int dev_ifsioc(struct net net, struct ifreq ifr, unsigned int cmd)
		cmd == SIOCBRADDIF \|\|
		cmd == SIOCBRDELIF \|\|
		cmd == SIOCSHWTSTAMP \|\|
		cmd == SIOCGHWTSTAMP \|\|
		cmd == SIOCWANDEV) {
		err = -EOPNOTSUPP;
		if (ops->ndo_do_ioctl) {
		@@ -546,6 +547,7 @@ int dev_ioctl(struct net net, unsigned int cmd, void __user arg)
		*/
		default:
		if (cmd == SIOCWANDEV \|\|
		cmd == SIOCGHWTSTAMP \|\|
		(cmd >= SIOCDEVPRIVATE &&
		cmd <= SIOCDEVPRIVATE + 15)) {
		dev_load(net, ifr.ifr_name);

+1 −0

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		@@ -3231,6 +3231,7 @@ static int compat_sock_ioctl_trans(struct file file, struct socket sock,
		case SIOCBONDSLAVEINFOQUERY:
		case SIOCBONDINFOQUERY:
		case SIOCSHWTSTAMP:
		case SIOCGHWTSTAMP:
		return compat_ifr_data_ioctl(net, cmd, argp);

		case FIOSETOWN: