NAME¶
vfs_busy —
marks a mount point as busy
SYNOPSIS¶
#include
<sys/param.h>
#include
<sys/mount.h>
int
vfs_busy(
struct
mount *mp,
int
flags);
DESCRIPTION¶
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).
SEE ALSO¶
vfs_unbusy(9)
AUTHORS¶
This manual page was written by
Chad David
⟨davidc@acns.ab.ca⟩.
