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net_tstamp: Add SIOCGHWTSTAMP ioctl to match SIOCSHWTSTAMP

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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.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
This commit is contained in:
Ben Hutchings 2013-11-14 01:19:29 +00:00
parent 590d4693fb
commit fd468c74bd
5 changed files with 19 additions and 10 deletions
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3
include/uapi/linux/sockios.h
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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 */