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authorEric Dumazet <dada1@cosmosbay.com>2007-03-18 17:33:16 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2007-04-25 22:24:04 -0700
commitae40eb1ef30ab4120bd3c8b7e3da99ee53d27a23 (patch)
treeb5ae288b3c27d13bde9648c41d7db3cfe1884bc2 /fs/compat_ioctl.c
parentcb69cc52364690d7789940c480b3a9490784b680 (diff)
downloadlwn-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.c18
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)