diff options
| author | Philip Guenther <guenther@cvs.openbsd.org> | 2018-06-04 04:57:10 +0000 |
|---|---|---|
| committer | Philip Guenther <guenther@cvs.openbsd.org> | 2018-06-04 04:57:10 +0000 |
| commit | 6c197d848df42a92aa361c79981e9b14f24513ad (patch) | |
| tree | 78b9cf7f499e6b8cb0964bfaf5fbdb172e9c35fe /share/man | |
| parent | 5f14f5d2e18a8b4147c76019a89186d8cae17af4 (diff) | |
Add VB_DUPOK to suppress witness(4) warning of concurrent mount locks.
Use that in three places:
- vfs_stall()
- sys_mount()
- dounmount()'s MNT_FORCE-does-recursive-unmounts case
ok deraadt@ visa@
Diffstat (limited to 'share/man')
| -rw-r--r-- | share/man/man9/vfs_busy.9 | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/share/man/man9/vfs_busy.9 b/share/man/man9/vfs_busy.9 index a468452e26e..1b6536ea7af 100644 --- a/share/man/man9/vfs_busy.9 +++ b/share/man/man9/vfs_busy.9 @@ -1,4 +1,4 @@ -.\" $OpenBSD: vfs_busy.9,v 1.2 2007/05/31 19:20:01 jmc Exp $ +.\" $OpenBSD: vfs_busy.9,v 1.3 2018/06/04 04:57:09 guenther Exp $ .\" .\" Copyright (c) 2006 Nikolay Sturm <sturm@openbsd.org> .\" @@ -14,7 +14,7 @@ .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. .\" -.Dd $Mdocdate: May 31 2007 $ +.Dd $Mdocdate: June 4 2018 $ .Dt VFS_BUSY 9 .Os .Sh NAME @@ -58,6 +58,10 @@ Acquire a write lock. Return immediately; do not wait for the conflicting lock to be released. .It VB_WAIT Wait for the conflicting lock to be released. +.It VB_DUPOK +Prevent +.Xr witness 4 +from logging when this thread already has a mount point locked. .El .Pp If a conflicting lock was encountered, @@ -76,5 +80,6 @@ The API is implemented in the file .Pa sys/kern/vfs_subr.c . .Sh SEE ALSO +.Xr witness 4 , .Xr rwlock 9 , .Xr vfs 9 |