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/*
* IMFS_unmount
*
* This routine will look at a mount table entry that we are going to
* add to the mount table. If the mount point
* rtems_filesystem_location_info_t struct refers to a node that is a
* directory that has a file system mounted on it, the node will be
* marked as a mount point by * setting its directory.mt_fs pointer
* to NULL. This indicates that a directory is no longer mounted on
* this node.
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <errno.h>
#include "imfs.h"
#include <rtems/libio_.h>
int IMFS_unmount(
rtems_filesystem_mount_table_entry_t *mt_entry
)
{
IMFS_jnode_t *node;
node = mt_entry->mt_point_node.node_access;
/*
* Is the node that we are mounting onto a directory node ?
*/
if ( node->type != IMFS_DIRECTORY )
set_errno_and_return_minus_one( ENOTDIR );
/*
* Did the node indicate that there was a directory mounted here?
*/
if ( node->info.directory.mt_fs == NULL )
set_errno_and_return_minus_one( EINVAL ); /* XXX */
/*
* Set the mt_fs pointer to indicate that there is no longer
* a file system mounted to this point.
*/
node->info.directory.mt_fs = NULL;
return 0;
}
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