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/*

 * Copyright (c) 2006-2007, Kohsuke Ohtani

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the author nor the names of any co-contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

#include <sys/vnode.h>

#include <sys/mount.h>

#include <errno.h>

#include "ramfs.h"

extern struct vnops ramfs_vnops;

static int ramfs_mount(mount_t mp, char *dev, int flags, void *data);

static int ramfs_unmount(mount_t mp);

#define ramfs_sync        ((vfsop_sync_t)vfs_nullop)

#define ramfs_vget        ((vfsop_vget_t)vfs_nullop)

#define ramfs_statfs        ((vfsop_statfs_t)vfs_nullop)

/*

 * File system operations

 */

struct vfsops ramfs_vfsops = {

        ramfs_mount,                /* mount */

        ramfs_unmount,                /* unmount */

        ramfs_sync,                /* sync */

        ramfs_vget,                /* vget */

        ramfs_statfs,                /* statfs */

        &ramfs_vnops,                /* vnops */

};

/*

 * Mount a file system.

 */

static int

ramfs_mount(mount_t mp, char *dev, int flags, void *data)

{

        struct ramfs_node *np;

        DPRINTF(("ramfs_mount: dev=%s\n", dev));

        /* Create a root node */

        np = ramfs_allocate_node("/", VDIR);

        if (np == NULL)

                return ENOMEM;

        mp->m_root->v_data = np;

        return 0;

}

/*

 * Unmount a file system.

 *

 * NOTE: Currently, we don't support unmounting of the RAMFS. This is

 *       because we have to deallocate all nodes included in all sub

 *       directories, and it requires more work...

 */

static int

ramfs_unmount(mount_t mp)

{

        return EBUSY;

}