- 根目录:
- include
- linux
- pnfs_osd_xdr.h
/*
* 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 <ooo@electrozaur.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>
/*
* 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;
struct pnfs_osd_opaque_cred oc_cap_key;
struct pnfs_osd_opaque_cred oc_cap;
};
/* struct pnfs_osd_layout4 {
* pnfs_osd_data_map4 olo_map;
* uint32_t olo_comps_index;
* pnfs_osd_object_cred4 olo_components<>;
* };
*/
struct pnfs_osd_layout {
struct pnfs_osd_data_map olo_map;
u32 olo_comps_index;
u32 olo_num_comps;
struct pnfs_osd_object_cred *olo_comps;
};
/* Device Address */
enum pnfs_osd_targetid_type {
OBJ_TARGET_ANON = 1,
OBJ_TARGET_SCSI_NAME = 2,
OBJ_TARGET_SCSI_DEVICE_ID = 3,
};
/* union pnfs_osd_targetid4 switch (pnfs_osd_targetid_type4 oti_type) {
* case OBJ_TARGET_SCSI_NAME:
* string oti_scsi_name<>;
*
* case OBJ_TARGET_SCSI_DEVICE_ID:
* opaque oti_scsi_device_id<>;
*
* default:
* void;
* };
*
* union pnfs_osd_targetaddr4 switch (bool ota_available) {
* case TRUE:
* netaddr4 ota_netaddr;
* case FALSE:
* void;
* };
*
* struct pnfs_osd_deviceaddr4 {
* pnfs_osd_targetid4 oda_targetid;
* pnfs_osd_targetaddr4 oda_targetaddr;
* uint64_t oda_lun;
* opaque oda_systemid<>;
* pnfs_osd_object_cred4 oda_root_obj_cred;
* opaque oda_osdname<>;
* };
*/
struct pnfs_osd_targetid {
u32 oti_type;
struct nfs4_string oti_scsi_device_id;
};
/* struct netaddr4 {
* // see struct rpcb in RFC1833
* string r_netid<>; // network id
* string r_addr<>; // universal address
* };
*/
struct pnfs_osd_net_addr {
struct nfs4_string r_netid;
struct nfs4_string r_addr;
};
struct pnfs_osd_targetaddr {
u32 ota_available;
struct pnfs_osd_net_addr ota_netaddr;
};
struct pnfs_osd_deviceaddr {
struct pnfs_osd_targetid oda_targetid;
struct pnfs_osd_targetaddr oda_targetaddr;
u8 oda_lun[8];
struct nfs4_string oda_systemid;
struct pnfs_osd_object_cred oda_root_obj_cred;
struct nfs4_string oda_osdname;
};
/* LAYOUTCOMMIT: layoutupdate */
/* union pnfs_osd_deltaspaceused4 switch (bool dsu_valid) {
* case TRUE:
* int64_t dsu_delta;
* case FALSE:
* void;
* };
*
* struct pnfs_osd_layoutupdate4 {
* pnfs_osd_deltaspaceused4 olu_delta_space_used;
* bool olu_ioerr_flag;
* };
*/
struct pnfs_osd_layoutupdate {
u32 dsu_valid;
s64 dsu_delta;
u32 olu_ioerr_flag;
};
/* LAYOUTRETURN: I/O Rrror Report */
enum pnfs_osd_errno {
PNFS_OSD_ERR_EIO = 1,
PNFS_OSD_ERR_NOT_FOUND = 2,
PNFS_OSD_ERR_NO_SPACE = 3,
PNFS_OSD_ERR_BAD_CRED = 4,
PNFS_OSD_ERR_NO_ACCESS = 5,
PNFS_OSD_ERR_UNREACHABLE = 6,
PNFS_OSD_ERR_RESOURCE = 7
};
/* struct pnfs_osd_ioerr4 {
* pnfs_osd_objid4 oer_component;
* length4 oer_comp_offset;
* length4 oer_comp_length;
* bool oer_iswrite;
* pnfs_osd_errno4 oer_errno;
* };
*/
struct pnfs_osd_ioerr {
struct pnfs_osd_objid oer_component;
u64 oer_comp_offset;
u64 oer_comp_length;
u32 oer_iswrite;
u32 oer_errno;
};
/* OSD XDR Client API */
/* Layout helpers */
/* Layout decoding is done in two parts:
* 1. First Call pnfs_osd_xdr_decode_layout_map to read in only the header part
* of the layout. @iter members need not be initialized.
* Returned:
* @layout members are set. (@layout->olo_comps set to NULL).
*
* Zero on success, or negative error if passed xdr is broken.
*
* 2. 2nd Call pnfs_osd_xdr_decode_layout_comp() in a loop until it returns
* false, to decode the next component.
* Returned:
* true if there is more to decode or false if we are done or error.
*
* Example:
* struct pnfs_osd_xdr_decode_layout_iter iter;
* struct pnfs_osd_layout layout;
* struct pnfs_osd_object_cred comp;
* int status;
*
* status = pnfs_osd_xdr_decode_layout_map(&layout, &iter, xdr);
* if (unlikely(status))
* goto err;
* while(pnfs_osd_xdr_decode_layout_comp(&comp, &iter, xdr, &status)) {
* // All of @comp strings point to inside the xdr_buffer
* // or scrach buffer. Copy them out to user memory eg.
* copy_single_comp(dest_comp++, &comp);
* }
* if (unlikely(status))
* goto err;
*/
struct pnfs_osd_xdr_decode_layout_iter {
unsigned total_comps;
unsigned decoded_comps;
};
extern int pnfs_osd_xdr_decode_layout_map(struct pnfs_osd_layout *layout,
struct pnfs_osd_xdr_decode_layout_iter *iter, struct xdr_stream *xdr);
extern bool pnfs_osd_xdr_decode_layout_comp(struct pnfs_osd_object_cred *comp,
struct pnfs_osd_xdr_decode_layout_iter *iter, struct xdr_stream *xdr,
int *err);
/* Device Info helpers */
/* Note: All strings inside @deviceaddr point to space inside @p.
* @p should stay valid while @deviceaddr is in use.
*/
extern void pnfs_osd_xdr_decode_deviceaddr(
struct pnfs_osd_deviceaddr *deviceaddr, __be32 *p);
/* layoutupdate (layout_commit) xdr helpers */
extern int
pnfs_osd_xdr_encode_layoutupdate(struct xdr_stream *xdr,
struct pnfs_osd_layoutupdate *lou);
/* osd_ioerror encoding (layout_return) */
extern __be32 *pnfs_osd_xdr_ioerr_reserve_space(struct xdr_stream *xdr);
extern void pnfs_osd_xdr_encode_ioerr(__be32 *p, struct pnfs_osd_ioerr *ioerr);
#endif /* __PNFS_OSD_XDR_H__ */