diff options
author | Eric Dumazet <dada1@cosmosbay.com> | 2007-03-18 20:33:16 -0400 |
---|---|---|
committer | David S. Miller <davem@sunset.davemloft.net> | 2007-04-26 01:24:04 -0400 |
commit | ae40eb1ef30ab4120bd3c8b7e3da99ee53d27a23 (patch) | |
tree | b5ae288b3c27d13bde9648c41d7db3cfe1884bc2 /net/core/sock.c | |
parent | cb69cc52364690d7789940c480b3a9490784b680 (diff) |
[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/core/sock.c')
-rw-r--r-- | net/core/sock.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/net/core/sock.c b/net/core/sock.c index 6ddb3664b993..cb48fa0e1249 100644 --- a/net/core/sock.c +++ b/net/core/sock.c | |||
@@ -1567,6 +1567,22 @@ int sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) | |||
1567 | } | 1567 | } |
1568 | EXPORT_SYMBOL(sock_get_timestamp); | 1568 | EXPORT_SYMBOL(sock_get_timestamp); |
1569 | 1569 | ||
1570 | int sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) | ||
1571 | { | ||
1572 | struct timespec ts; | ||
1573 | if (!sock_flag(sk, SOCK_TIMESTAMP)) | ||
1574 | sock_enable_timestamp(sk); | ||
1575 | ts = ktime_to_timespec(sk->sk_stamp); | ||
1576 | if (ts.tv_sec == -1) | ||
1577 | return -ENOENT; | ||
1578 | if (ts.tv_sec == 0) { | ||
1579 | sk->sk_stamp = ktime_get_real(); | ||
1580 | ts = ktime_to_timespec(sk->sk_stamp); | ||
1581 | } | ||
1582 | return copy_to_user(userstamp, &ts, sizeof(ts)) ? -EFAULT : 0; | ||
1583 | } | ||
1584 | EXPORT_SYMBOL(sock_get_timestampns); | ||
1585 | |||
1570 | void sock_enable_timestamp(struct sock *sk) | 1586 | void sock_enable_timestamp(struct sock *sk) |
1571 | { | 1587 | { |
1572 | if (!sock_flag(sk, SOCK_TIMESTAMP)) { | 1588 | if (!sock_flag(sk, SOCK_TIMESTAMP)) { |