/*
 *  pNFS-osd on-the-wire data structures
 *
 *  Copyright (C) 2007 Panasas Inc. [year of first publication]
 *  All rights reserved.
 *
 *  Benny Halevy <bhalevy@panasas.com>
 *  Boaz Harrosh <bharrosh@panasas.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2
 *  See the file COPYING included with this distribution for more details.
 *
 *  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 Panasas company nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED ``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 REGENTS 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.
 */
#ifndef __PNFS_OSD_XDR_H__
#define __PNFS_OSD_XDR_H__

#include <linux/nfs_fs.h>
#include <linux/nfs_page.h>

/*
 * draft-ietf-nfsv4-minorversion-22
 * draft-ietf-nfsv4-pnfs-obj-12
 */

/* Layout Structure */

enum pnfs_osd_raid_algorithm4 {
	PNFS_OSD_RAID_0		= 1,
	PNFS_OSD_RAID_4		= 2,
	PNFS_OSD_RAID_5		= 3,
	PNFS_OSD_RAID_PQ	= 4     /* Reed-Solomon P+Q */
};

/*   struct pnfs_osd_data_map4 {
 *       uint32_t                    odm_num_comps;
 *       length4                     odm_stripe_unit;
 *       uint32_t                    odm_group_width;
 *       uint32_t                    odm_group_depth;
 *       uint32_t                    odm_mirror_cnt;
 *       pnfs_osd_raid_algorithm4    odm_raid_algorithm;
 *   };
 */
struct pnfs_osd_data_map {
	u32	odm_num_comps;
	u64	odm_stripe_unit;
	u32	odm_group_width;
	u32	odm_group_depth;
	u32	odm_mirror_cnt;
	u32	odm_raid_algorithm;
};

/*   struct pnfs_osd_objid4 {
 *       deviceid4       oid_device_id;
 *       uint64_t        oid_partition_id;
 *       uint64_t        oid_object_id;
 *   };
 */
struct pnfs_osd_objid {
	struct nfs4_deviceid	oid_device_id;
	u64			oid_partition_id;
	u64			oid_object_id;
};

/* For printout. I use:
 * kprint("dev(%llx:%llx)", _DEVID_LO(pointer), _DEVID_HI(pointer));
 * BE style
 */
#define _DEVID_LO(oid_device_id) \
	(unsigned long long)be64_to_cpup((__be64 *)(oid_device_id)->data)

#define _DEVID_HI(oid_device_id) \
	(unsigned long long)be64_to_cpup(((__be64 *)(oid_device_id)->data) + 1)

enum pnfs_osd_version {
	PNFS_OSD_MISSING              = 0,
	PNFS_OSD_VERSION_1            = 1,
	PNFS_OSD_VERSION_2            = 2
};

struct pnfs_osd_opaque_cred {
	u32 cred_len;
	void *cred;
};

enum pnfs_osd_cap_key_sec {
	PNFS_OSD_CAP_KEY_SEC_NONE     = 0,
	PNFS_OSD_CAP_KEY_SEC_SSV      = 1,
};

/*   struct pnfs_osd_object_cred4 {
 *       pnfs_osd_objid4         oc_object_id;
 *       pnfs_osd_version4       oc_osd_version;
 *       pnfs_osd_cap_key_sec4   oc_cap_key_sec;
 *       opaque                  oc_capability_key<>;
 *       opaque                  oc_capability<>;
 *   };
 */
struct pnfs_osd_object_cred {
	struct pnfs_osd_objid		oc_object_id;
	u32				oc_osd_version;
	u32				oc_cap_key_sec;