Provided by: freebsd-manpages_8.0-1_all bug

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.  The purpose of this
     function is to synchronize access to 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 LK_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
     ENOENT will always be returned.


ERRORS
     [ENOENT]           The mount point is being unmounted (MNTK_UNMOUNT is
                        set).


AUTHORS
     This manual page was written by Chad David 〈davidc@acns.ab.ca〉.