/*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 * Common Development and Distribution License (the "License").

 * You may not use this file except in compliance with the License.

 *

 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

 * or http://www.opensolaris.org/os/licensing.

 * See the License for the specific language governing permissions

 * and limitations under the License.

 *

 * When distributing Covered Code, include this CDDL HEADER in each

 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

 * If applicable, add the following below this CDDL HEADER, with the

 * fields enclosed by brackets "[]" replaced with your own identifying

 * information: Portions Copyright [yyyy] [name of copyright owner]

 *

 * CDDL HEADER END

 */

/*

 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 */

#ifndef _SHAREFS_SHAREFS_H

#define	_SHAREFS_SHAREFS_H

#pragma ident	"%Z%%M%	%I%	%E% SMI"

/*

 * This header provides service for the sharefs module.

 */

#include <sys/modctl.h>

#include <sys/vfs.h>

#include <sys/vnode.h>

#include <sys/gfs.h>

#include <sharefs/share.h>

#include <sharefs/sharetab.h>

#ifdef __cplusplus

extern "C" {

#endif

#define	SHAREFS_ROOT	"/etc/dfs"

#define	SHAREFS_BASE	"sharetab"

/*

 * Lengths of strings.

 */

typedef struct sharefs_lens {

	int	shl_path;

	int	shl_res;

	int	shl_fstype;

	int	shl_opts;

	int	shl_descr;

} sharefs_lens_t;

/*

 * VFS data object

 */

typedef struct sharefs_vfs {

	vnode_t	*sharefs_vfs_root;

} sharefs_vfs_t;

#define	SHAREFS_NAME_MAX	MAXNAMELEN

/*

 * The lock ordering whenever sharefs_lock and sharetab_lock both

 * need to be held is: sharefs_lock and then sharetab_lock.

 */

extern krwlock_t	sharefs_lock;	/* lock for the vnode ops */

extern sharetab_t	*sharefs_sharetab;	/* The sharetab. */

extern uint_t		sharetab_count;	/* How many shares? */

extern krwlock_t	sharetab_lock;	/* lock for the cached sharetab */

extern size_t		sharetab_size;	/* How big is the sharetab file? */

extern timestruc_t	sharetab_mtime;	/* Last mod to sharetab */

extern timestruc_t	sharetab_snap_time;	/* Last snap */

extern uint_t		sharetab_generation;	/* Which copy is it? */

#define	SHAREFS_INO_FILE	0x80

extern vnode_t *sharefs_create_root_file(vfs_t *);

/*

 * Sharetab file

 *

 * Note that even though the sharetab code does not explictly

 * use 'sharefs_file', it is required by GFS that the first

 * field of the private data be a gfs_file_t.

 */

typedef struct shnode_t {

	gfs_file_t	sharefs_file;		/* gfs file */

	char		*sharefs_snap;		/* snapshot of the share */

	size_t		sharefs_size;		/* size of the snapshot */

	uint_t		sharefs_count;		/* number of shares */

	uint_t		sharefs_refs;		/* reference count */

	uint_t		sharefs_real_vp;	/* Are we a real or snap */

	uint_t		sharefs_generation;	/* Which copy are we? */

	timestruc_t	sharefs_snap_time;	/* When were we modded? */

} shnode_t;

/*

 * Some conversion macros:

 */

#define	VTOSH(vp)	((shnode_t *)((vp)->v_data))

extern const fs_operation_def_t	sharefs_tops_data[];

extern vnodeops_t		*sharefs_ops_data;

extern void sharefs_data_init(void);

extern void sharefs_sharetab_init(void);

#ifdef __cplusplus

}

#endif

#endif /* !_SHAREFS_SHAREFS_H */