diff options
Diffstat (limited to 'sys/kern/vfs_export.c')
| -rw-r--r-- | sys/kern/vfs_export.c | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/sys/kern/vfs_export.c b/sys/kern/vfs_export.c index 21bb57b..043a5bf 100644 --- a/sys/kern/vfs_export.c +++ b/sys/kern/vfs_export.c @@ -36,7 +36,7 @@ * SUCH DAMAGE. * * @(#)vfs_subr.c 8.31 (Berkeley) 5/26/95 - * $Id: vfs_subr.c,v 1.216 1999/08/13 10:10:01 phk Exp $ + * $Id: vfs_subr.c,v 1.217 1999/08/13 10:29:21 phk Exp $ */ /* @@ -361,6 +361,48 @@ vfs_getnewfsid(mp) } /* + * Knob to control the precision of file timestamps: + * + * 0 = seconds only; nanoseconds zeroed. + * 1 = seconds and nanoseconds, accurate within 1/HZ. + * 2 = seconds and nanoseconds, truncated to microseconds. + * >=3 = seconds and nanoseconds, maximum precision. + */ +enum { TSP_SEC, TSP_HZ, TSP_USEC, TSP_NSEC }; + +static int timestamp_precision = TSP_SEC; +SYSCTL_INT(_vfs, OID_AUTO, timestamp_precision, CTLFLAG_RW, + ×tamp_precision, 0, ""); + +/* + * Get a current timestamp. + */ +void +vfs_timestamp(tsp) + struct timespec *tsp; +{ + struct timeval tv; + + switch (timestamp_precision) { + case TSP_SEC: + tsp->tv_sec = time_second; + tsp->tv_nsec = 0; + break; + case TSP_HZ: + getnanotime(tsp); + break; + case TSP_USEC: + microtime(&tv); + TIMEVAL_TO_TIMESPEC(&tv, tsp); + break; + case TSP_NSEC: + default: + nanotime(tsp); + break; + } +} + +/* * Set vnode attributes to VNOVAL */ void |
