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| author | Eric Dumazet <dada1@cosmosbay.com> | 2007-03-25 22:14:49 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-04-25 22:24:21 -0700 |
| commit | 92f37fd2ee805aa77925c1e64fd56088b46094fc (patch) | |
| tree | 8251c38b83ab362116dac89d94412ce229b42831 /net/compat.c | |
| parent | c7a3c5da35055e2fa97ed4f0da3eec4bd0ef4c38 (diff) | |
| download | lwn-92f37fd2ee805aa77925c1e64fd56088b46094fc.tar.gz lwn-92f37fd2ee805aa77925c1e64fd56088b46094fc.zip | |
[NET]: Adding SO_TIMESTAMPNS / SCM_TIMESTAMPNS support
Now that network timestamps use ktime_t infrastructure, we can add a new
SOL_SOCKET sockopt SO_TIMESTAMPNS.
This command is similar to SO_TIMESTAMP, but permits transmission of
a 'timespec struct' instead of a 'timeval struct' control message.
(nanosecond resolution instead of microsecond)
Control message is labelled SCM_TIMESTAMPNS instead of SCM_TIMESTAMP
A socket cannot mix SO_TIMESTAMP and SO_TIMESTAMPNS : the two modes are
mutually exclusive.
sock_recv_timestamp() became too big to be fully inlined so I added a
__sock_recv_timestamp() helper function.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
CC: linux-arch@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/compat.c')
| -rw-r--r-- | net/compat.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/net/compat.c b/net/compat.c index 0e407563ae85..9a0f5f2b90c8 100644 --- a/net/compat.c +++ b/net/compat.c @@ -215,6 +215,7 @@ Efault: int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) { struct compat_timeval ctv; + struct compat_timespec cts; struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; struct compat_cmsghdr cmhdr; int cmlen; @@ -229,7 +230,14 @@ int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *dat ctv.tv_sec = tv->tv_sec; ctv.tv_usec = tv->tv_usec; data = &ctv; - len = sizeof(struct compat_timeval); + len = sizeof(ctv); + } + if (level == SOL_SOCKET && type == SO_TIMESTAMPNS) { + struct timespec *ts = (struct timespec *)data; + cts.tv_sec = ts->tv_sec; + cts.tv_nsec = ts->tv_nsec; + data = &cts; + len = sizeof(cts); } cmlen = CMSG_COMPAT_LEN(len); |