vfs_busy9
Marks a mount point as busy
Usage
#include <sys/param.h>
#include <sys/mount.h>
int
vfs_busy(struct mount *mp, int flags);
Overview
The vfs_busy() function marks a mount point as busy by incrementing the reference count of a mount point. It also delays unmounting by sleeping on mp if the MNTK_UNMOUNT flag is set in mp->mnt_kern_flag and the MBF_NOWAIT flag is not set.
Its arguments are:
- mp
-
The mount point to busy.
- flags
-
Flags controlling how
vfs_busy() should act.- MBF_NOWAIT
-
do not sleep if MNTK_UNMOUNT is set.
- MBF_MNTLSTLOCK
-
drop the mountlist_mtx in the critical path.
Return values
A 0 value is returned on success. If the mount point is being unmounted and MBF_NOWAIT flag is specified ENOENT will be returned.
Errors
- [ENOENT]
-
The mount point is being unmounted (MNTK_UNMOUNT is set).
Releases
56 releases since FreeBSD 5.0-RELEASE; the text changed 33 times.