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[NET]: Introduce SIOCGSTAMPNS ioctl to get timestamps with nanosec resolution

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Now network timestamps use ktime_t infrastructure, we can add a new
ioctl() SIOCGSTAMPNS command to get timestamps in 'struct timespec'.
User programs can thus access to nanosecond resolution.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
CC: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2007-03-18 17:33:16 -07:00
committed by David S. Miller
parent cb69cc5236
commit ae40eb1ef3
37 changed files with 146 additions and 22 deletions
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18
fs/compat_ioctl.c
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@ -266,6 +266,23 @@ static int do_siocgstamp(unsigned int fd, unsigned int cmd, unsigned long arg)
return err;
}
static int do_siocgstampns(unsigned int fd, unsigned int cmd, unsigned long arg)
{
struct compat_timespec __user *up = compat_ptr(arg);
struct timespec kts;
mm_segment_t old_fs = get_fs();
int err;
set_fs(KERNEL_DS);
err = sys_ioctl(fd, cmd, (unsigned long)&kts);
set_fs(old_fs);
if (!err) {
err = put_user(kts.tv_sec, &up->tv_sec);
err |= __put_user(kts.tv_nsec, &up->tv_nsec);
}
return err;
}
struct ifmap32 {
compat_ulong_t mem_start;
compat_ulong_t mem_end;
@ -2437,6 +2454,7 @@ HANDLE_IOCTL(SIOCBRDELIF, dev_ifsioc)
/* Note SIOCRTMSG is no longer, so this is safe and * the user would have seen just an -EINVAL anyways. */
HANDLE_IOCTL(SIOCRTMSG, ret_einval)
HANDLE_IOCTL(SIOCGSTAMP, do_siocgstamp)
HANDLE_IOCTL(SIOCGSTAMPNS, do_siocgstampns)
#endif
#ifdef CONFIG_BLOCK
HANDLE_IOCTL(HDIO_GETGEO, hdio_getgeo)