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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 /net/compat.c
parentcb69cc52364690d7789940c480b3a9490784b680 (diff)
downloadlinux-ae40eb1ef30ab4120bd3c8b7e3da99ee53d27a23.tar.gz
[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 'net/compat.c')
-rw-r--r--net/compat.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/net/compat.c b/net/compat.c
index 17c2710b2b9..2fc6d9bb622 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -564,6 +564,30 @@ int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
}
EXPORT_SYMBOL(compat_sock_get_timestamp);
+int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
+{
+ struct compat_timespec __user *ctv =
+ (struct compat_timespec __user*) userstamp;
+ int err = -ENOENT;
+ struct timespec ts;
+
+ if (!sock_flag(sk, SOCK_TIMESTAMP))
+ sock_enable_timestamp(sk);
+ ts = ktime_to_timespec(sk->sk_stamp);
+ if (ts.tv_sec == -1)
+ return err;
+ if (ts.tv_sec == 0) {
+ sk->sk_stamp = ktime_get_real();
+ ts = ktime_to_timespec(sk->sk_stamp);
+ }
+ err = 0;
+ if (put_user(ts.tv_sec, &ctv->tv_sec) ||
+ put_user(ts.tv_nsec, &ctv->tv_nsec))
+ err = -EFAULT;
+ return err;
+}
+EXPORT_SYMBOL(compat_sock_get_timestampns);
+
asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
char __user *optval, int __user *optlen)
{