net_tstamp: Add SIOCGHWTSTAMP ioctl to match SIOCSHWTSTAMP

SIOCSHWTSTAMP returns the real configuration to the application using it, but there is currently no way for any other application to find out the configuration non-destructively. Add a new ioctl for this, making it unprivileged.

Ben Hutchings committed 13 years ago

Commit fd468c71 parent 590d4695 files · +19 −10Browse files

Showing the changes to include/uapi/linux (2 of 5 files). Show all

Unified · Split

2 files

include/uapi/linux/net_tstamp.h +7 −7
include/uapi/linux/sockios.h +2 −1

include/uapi/linux/net_tstamp.h+7−7

@@ -26,17 +26,17 @@ enum { · 25 unmodified lines
26	26	};
27	27
28	28	/**
29		− * struct hwtstamp_config - %SIOCSHWTSTAMP parameter
	29	+ * struct hwtstamp_config - %SIOCGHWTSTAMP and %SIOCSHWTSTAMP parameter
30	30	*
31		− * @flags: no flags defined right now, must be zero
	31	+ * @flags: no flags defined right now, must be zero for %SIOCSHWTSTAMP
32	32	* @tx_type: one of HWTSTAMP_TX_*
33	33	* @rx_filter: one of HWTSTAMP_FILTER_*
34	34	*
35		− * %SIOCSHWTSTAMP expects a &struct ifreq with a ifr_data pointer to
36		− * this structure. If the driver or hardware does not support the
37		− * requested @rx_filter value, the driver may use a more general
38		− * filter mode. In this case @rx_filter will indicate the actual mode
39		− * on return.
	35	+ * %SIOCGHWTSTAMP and %SIOCSHWTSTAMP expect a &struct ifreq with a
	36	+ * ifr_data pointer to this structure. For %SIOCSHWTSTAMP, if the
	37	+ * driver or hardware does not support the requested @rx_filter value,
	38	+ * the driver may use a more general filter mode. In this case
	39	+ * @rx_filter will indicate the actual mode on return.
40	40	*/
41	41	struct hwtstamp_config {
42	42	int flags;

include/uapi/linux/sockios.h+2−1

@@ -125,7 +125,8 @@ · 124 unmodified lines
125	125	#define SIOCBRDELIF 0x89a3 /* remove interface from bridge */
126	126
127	127	/* hardware time stamping: parameters in linux/net_tstamp.h */
128		−#define SIOCSHWTSTAMP 0x89b0
	128	+#define SIOCSHWTSTAMP 0x89b0 /* set and get config */
	129	+#define SIOCGHWTSTAMP 0x89b1 /* get config */
129	130
130	131	/* Device private ioctl calls */
131	132