diff options
| author | Eric Dumazet <dada1@cosmosbay.com> | 2007-03-18 17:33:16 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-04-25 22:24:04 -0700 |
| commit | ae40eb1ef30ab4120bd3c8b7e3da99ee53d27a23 (patch) | |
| tree | b5ae288b3c27d13bde9648c41d7db3cfe1884bc2 /fs/compat_ioctl.c | |
| parent | cb69cc52364690d7789940c480b3a9490784b680 (diff) | |
| download | lwn-ae40eb1ef30ab4120bd3c8b7e3da99ee53d27a23.tar.gz lwn-ae40eb1ef30ab4120bd3c8b7e3da99ee53d27a23.zip | |
[NET]: Introduce SIOCGSTAMPNS ioctl to get timestamps with nanosec resolution
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>
Diffstat (limited to 'fs/compat_ioctl.c')
| -rw-r--r-- | fs/compat_ioctl.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index 8b1c5d8bf4ef..c68b055fa26e 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -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) |