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| 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 /net/core/sock.c | |
| parent | cb69cc52364690d7789940c480b3a9490784b680 (diff) | |
| download | kernel-common-ae40eb1ef30ab4120bd3c8b7e3da99ee53d27a23.tar.gz kernel-common-ae40eb1ef30ab4120bd3c8b7e3da99ee53d27a23.tar.bz2 kernel-common-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 '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) } EXPORT_SYMBOL(sock_get_timestamp); +int sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) +{ + 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 -ENOENT; + if (ts.tv_sec == 0) { + sk->sk_stamp = ktime_get_real(); + ts = ktime_to_timespec(sk->sk_stamp); + } + return copy_to_user(userstamp, &ts, sizeof(ts)) ? -EFAULT : 0; +} +EXPORT_SYMBOL(sock_get_timestampns); + void sock_enable_timestamp(struct sock *sk) { if (!sock_flag(sk, SOCK_TIMESTAMP)) { |