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VFS_MOUNTEDON(9) FreeBSD Kernel Developer's Manual VFS_MOUNTEDON(9)
NAME
vfs_mountedon -- check if the vnode belongs to a mounted file system
SYNOPSIS
#include <sys/param.h>
#include <sys/mount.h>
int
vfs_mountedon(struct vnode *vp);
DESCRIPTION
vfs_mountedon() inspects the mount structure in vp to determine if it
points to a valid mount point. If the mount is valid, the vnode is con-
sidered to be busy.
A common use of vfs_mountedon() is to call it on device vnodes to deter-
mine if they are already associated with a file system. This is done to
prevent multiple mounts on the same device.
RETURN VALUES
EBUSY is returned if the vnode has a valid mount point; otherwise, 0 is
returned.
PSEUDOCODE
int
ffs_mountfs(devvp, mp, td, malloctype)
register struct vnode *devvp;
struct mount *mp;
struct thread *td;
struct malloc_type *malloctype;
{
...
error = vfs_mountedon(devvp);
if (error)
return (error);
...
}
AUTHORS
This manual page was written by Chad David <davidc@acns.ab.ca>.
FreeBSD 6.2 November 21, 2001 FreeBSD 6.2
Man(1) output converted with
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This page was generated on Wed Sep 19 20:40:49 BST 2007
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