[apple/xnu.git] / bsd / miscfs / volfs / volfs.h

/*
 * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
 * 
 * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code 
 * as defined in and that are subject to the Apple Public Source License 
 * Version 2.0 (the 'License'). You may not use this file except in 
 * compliance with the License.  The rights granted to you under the 
 * License may not be used to create, or enable the creation or 
 * redistribution of, unlawful or unlicensed copies of an Apple operating 
 * system, or to circumvent, violate, or enable the circumvention or 
 * violation of, any terms of an Apple operating system software license 
 * agreement.
 *
 * Please obtain a copy of the License at 
 * http://www.opensource.apple.com/apsl/ and read it before using this 
 * file.
 *
 * The Original Code and all software distributed under the License are 
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * Please see the License for the specific language governing rights and 
 * limitations under the License.
 *
 * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
 */

#ifndef __VOLFS_VOLFS_H__
#define __VOLFS_VOLFS_H__

#include  <sys/appleapiopts.h>

#ifdef __APPLE_API_PRIVATE
struct volfs_mntdata
{
	struct vnode *volfs_rootvp;
};

/*
 * Volfs vnodes exist only for the root, which allows for the enumeration
 * of all volfs accessible filesystems, and for the filesystems which
 * volfs handles.
 */
#define VOLFS_ROOT	1	/* This volfs vnode represents root of volfs */
#define	VOLFS_FSNODE	2	/* This volfs vnode represents a file system */

struct volfs_vndata
{
	int		vnode_type;
	unsigned int	nodeID;	/* the dev entry of a file system */
	struct mount *	fs_mount;
	fsid_t	fs_fsid;
};

#define MAXVLFSNAMLEN	24	/* max length is really 10, pad to 24 since
				 * some of the math depends on VLFSDIRENTLEN
				 * being a power of 2 */
#define VLFSDIRENTLEN	(MAXVLFSNAMLEN + sizeof(u_int32_t) + sizeof(u_int16_t) + sizeof(u_int8_t) + sizeof(u_int8_t))

#define ROOT_DIRID	2

#define MAXPLCENTRIES 250
#define PLCHASHSIZE 128


#define VTOVL(VP) ((struct volfs_vndata *)((VP)->v_data))

#define PRINTIT kprintf


#endif /* __APPLE_API_PRIVATE */
#endif /* __VOLFS_VOLFS_H__ */
Commit	Line	Data
1c79356b	1	/*
8ad349bb	2	* Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
1c79356b	3	*
8ad349bb	4	* @APPLE_LICENSE_OSREFERENCE_HEADER_START@
1c79356b	5	*
8ad349bb A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the
	10	* License may not be used to create, or enable the creation or
	11	* redistribution of, unlawful or unlicensed copies of an Apple operating
	12	* system, or to circumvent, violate, or enable the circumvention or
	13	* violation of, any terms of an Apple operating system software license
	14	* agreement.
	15	*
	16	* Please obtain a copy of the License at
	17	* http://www.opensource.apple.com/apsl/ and read it before using this
	18	* file.
	19	*
	20	* The Original Code and all software distributed under the License are
	21	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	22	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	23	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	24	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	25	* Please see the License for the specific language governing rights and
	26	* limitations under the License.
	27	*
	28	* @APPLE_LICENSE_OSREFERENCE_HEADER_END@
1c79356b	29	*/
91447636	30
9bccf70c A	31	#ifndef __VOLFS_VOLFS_H__
9bccf70c A	32	#define __VOLFS_VOLFS_H__
1c79356b	33
9bccf70c A	34	#include <sys/appleapiopts.h>
	35
	36	#ifdef __APPLE_API_PRIVATE
1c79356b A	37	struct volfs_mntdata
	38	{
	39	struct vnode *volfs_rootvp;
1c79356b A	40	};
	41
	42	/*
	43	* Volfs vnodes exist only for the root, which allows for the enumeration
	44	* of all volfs accessible filesystems, and for the filesystems which
	45	* volfs handles.
	46	*/
	47	#define VOLFS_ROOT 1 /* This volfs vnode represents root of volfs */
	48	#define VOLFS_FSNODE 2 /* This volfs vnode represents a file system */
	49
	50	struct volfs_vndata
	51	{
	52	int vnode_type;
1c79356b A	53	unsigned int nodeID; /* the dev entry of a file system */
1c79356b A	54	struct mount * fs_mount;
91447636	55	fsid_t fs_fsid;
1c79356b A	56	};
	57
	58	#define MAXVLFSNAMLEN 24 /* max length is really 10, pad to 24 since
	59	* some of the math depends on VLFSDIRENTLEN
	60	* being a power of 2 */
	61	#define VLFSDIRENTLEN (MAXVLFSNAMLEN + sizeof(u_int32_t) + sizeof(u_int16_t) + sizeof(u_int8_t) + sizeof(u_int8_t))
	62
	63	#define ROOT_DIRID 2
	64
55e303ae A	65	#define MAXPLCENTRIES 250
	66	#define PLCHASHSIZE 128
	67
1c79356b A	68
	69	#define VTOVL(VP) ((struct volfs_vndata *)((VP)->v_data))
	70
	71	#define PRINTIT kprintf
	72
9bccf70c A	73
	74	#endif /* __APPLE_API_PRIVATE */
	75	#endif /* __VOLFS_VOLFS_H__ */