319 lines
9.3 KiB
C
319 lines
9.3 KiB
C
/*
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* pNFS-osd on-the-wire data structures
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*
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* Copyright (C) 2007 Panasas Inc. [year of first publication]
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* All rights reserved.
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*
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* Benny Halevy <bhalevy@panasas.com>
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* Boaz Harrosh <bharrosh@panasas.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* See the file COPYING included with this distribution for more details.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Panasas company nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __PNFS_OSD_XDR_H__
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#define __PNFS_OSD_XDR_H__
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#include <linux/nfs_fs.h>
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#include <linux/nfs_page.h>
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/*
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* draft-ietf-nfsv4-minorversion-22
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* draft-ietf-nfsv4-pnfs-obj-12
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*/
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/* Layout Structure */
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enum pnfs_osd_raid_algorithm4 {
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PNFS_OSD_RAID_0 = 1,
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PNFS_OSD_RAID_4 = 2,
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PNFS_OSD_RAID_5 = 3,
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PNFS_OSD_RAID_PQ = 4 /* Reed-Solomon P+Q */
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};
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/* struct pnfs_osd_data_map4 {
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* uint32_t odm_num_comps;
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* length4 odm_stripe_unit;
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* uint32_t odm_group_width;
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* uint32_t odm_group_depth;
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* uint32_t odm_mirror_cnt;
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* pnfs_osd_raid_algorithm4 odm_raid_algorithm;
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* };
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*/
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struct pnfs_osd_data_map {
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u32 odm_num_comps;
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u64 odm_stripe_unit;
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u32 odm_group_width;
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u32 odm_group_depth;
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u32 odm_mirror_cnt;
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u32 odm_raid_algorithm;
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};
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/* struct pnfs_osd_objid4 {
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* deviceid4 oid_device_id;
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* uint64_t oid_partition_id;
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* uint64_t oid_object_id;
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* };
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*/
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struct pnfs_osd_objid {
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struct nfs4_deviceid oid_device_id;
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u64 oid_partition_id;
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u64 oid_object_id;
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};
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/* For printout. I use:
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* kprint("dev(%llx:%llx)", _DEVID_LO(pointer), _DEVID_HI(pointer));
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* BE style
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*/
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#define _DEVID_LO(oid_device_id) \
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(unsigned long long)be64_to_cpup((__be64 *)(oid_device_id)->data)
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#define _DEVID_HI(oid_device_id) \
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(unsigned long long)be64_to_cpup(((__be64 *)(oid_device_id)->data) + 1)
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enum pnfs_osd_version {
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PNFS_OSD_MISSING = 0,
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PNFS_OSD_VERSION_1 = 1,
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PNFS_OSD_VERSION_2 = 2
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};
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struct pnfs_osd_opaque_cred {
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u32 cred_len;
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void *cred;
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};
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enum pnfs_osd_cap_key_sec {
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PNFS_OSD_CAP_KEY_SEC_NONE = 0,
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PNFS_OSD_CAP_KEY_SEC_SSV = 1,
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};
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/* struct pnfs_osd_object_cred4 {
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* pnfs_osd_objid4 oc_object_id;
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* pnfs_osd_version4 oc_osd_version;
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* pnfs_osd_cap_key_sec4 oc_cap_key_sec;
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* opaque oc_capability_key<>;
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* opaque oc_capability<>;
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* };
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*/
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struct pnfs_osd_object_cred {
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struct pnfs_osd_objid oc_object_id;
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u32 oc_osd_version;
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u32 oc_cap_key_sec;
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struct pnfs_osd_opaque_cred oc_cap_key;
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struct pnfs_osd_opaque_cred oc_cap;
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};
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/* struct pnfs_osd_layout4 {
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* pnfs_osd_data_map4 olo_map;
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* uint32_t olo_comps_index;
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* pnfs_osd_object_cred4 olo_components<>;
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* };
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*/
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struct pnfs_osd_layout {
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struct pnfs_osd_data_map olo_map;
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u32 olo_comps_index;
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u32 olo_num_comps;
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struct pnfs_osd_object_cred *olo_comps;
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};
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/* Device Address */
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enum pnfs_osd_targetid_type {
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OBJ_TARGET_ANON = 1,
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OBJ_TARGET_SCSI_NAME = 2,
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OBJ_TARGET_SCSI_DEVICE_ID = 3,
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};
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/* union pnfs_osd_targetid4 switch (pnfs_osd_targetid_type4 oti_type) {
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* case OBJ_TARGET_SCSI_NAME:
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* string oti_scsi_name<>;
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*
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* case OBJ_TARGET_SCSI_DEVICE_ID:
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* opaque oti_scsi_device_id<>;
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*
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* default:
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* void;
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* };
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*
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* union pnfs_osd_targetaddr4 switch (bool ota_available) {
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* case TRUE:
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* netaddr4 ota_netaddr;
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* case FALSE:
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* void;
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* };
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*
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* struct pnfs_osd_deviceaddr4 {
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* pnfs_osd_targetid4 oda_targetid;
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* pnfs_osd_targetaddr4 oda_targetaddr;
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* uint64_t oda_lun;
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* opaque oda_systemid<>;
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* pnfs_osd_object_cred4 oda_root_obj_cred;
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* opaque oda_osdname<>;
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* };
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*/
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struct pnfs_osd_targetid {
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u32 oti_type;
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struct nfs4_string oti_scsi_device_id;
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};
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/* struct netaddr4 {
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* // see struct rpcb in RFC1833
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* string r_netid<>; // network id
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* string r_addr<>; // universal address
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* };
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*/
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struct pnfs_osd_net_addr {
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struct nfs4_string r_netid;
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struct nfs4_string r_addr;
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};
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struct pnfs_osd_targetaddr {
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u32 ota_available;
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struct pnfs_osd_net_addr ota_netaddr;
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};
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struct pnfs_osd_deviceaddr {
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struct pnfs_osd_targetid oda_targetid;
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struct pnfs_osd_targetaddr oda_targetaddr;
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u8 oda_lun[8];
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struct nfs4_string oda_systemid;
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struct pnfs_osd_object_cred oda_root_obj_cred;
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struct nfs4_string oda_osdname;
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};
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/* LAYOUTCOMMIT: layoutupdate */
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/* union pnfs_osd_deltaspaceused4 switch (bool dsu_valid) {
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* case TRUE:
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* int64_t dsu_delta;
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* case FALSE:
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* void;
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* };
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*
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* struct pnfs_osd_layoutupdate4 {
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* pnfs_osd_deltaspaceused4 olu_delta_space_used;
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* bool olu_ioerr_flag;
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* };
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*/
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struct pnfs_osd_layoutupdate {
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u32 dsu_valid;
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s64 dsu_delta;
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u32 olu_ioerr_flag;
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};
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/* LAYOUTRETURN: I/O Rrror Report */
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enum pnfs_osd_errno {
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PNFS_OSD_ERR_EIO = 1,
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PNFS_OSD_ERR_NOT_FOUND = 2,
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PNFS_OSD_ERR_NO_SPACE = 3,
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PNFS_OSD_ERR_BAD_CRED = 4,
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PNFS_OSD_ERR_NO_ACCESS = 5,
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PNFS_OSD_ERR_UNREACHABLE = 6,
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PNFS_OSD_ERR_RESOURCE = 7
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};
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/* struct pnfs_osd_ioerr4 {
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* pnfs_osd_objid4 oer_component;
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* length4 oer_comp_offset;
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* length4 oer_comp_length;
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* bool oer_iswrite;
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* pnfs_osd_errno4 oer_errno;
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* };
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*/
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struct pnfs_osd_ioerr {
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struct pnfs_osd_objid oer_component;
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u64 oer_comp_offset;
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u64 oer_comp_length;
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u32 oer_iswrite;
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u32 oer_errno;
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};
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/* OSD XDR Client API */
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/* Layout helpers */
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/* Layout decoding is done in two parts:
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* 1. First Call pnfs_osd_xdr_decode_layout_map to read in only the header part
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* of the layout. @iter members need not be initialized.
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* Returned:
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* @layout members are set. (@layout->olo_comps set to NULL).
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*
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* Zero on success, or negative error if passed xdr is broken.
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*
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* 2. 2nd Call pnfs_osd_xdr_decode_layout_comp() in a loop until it returns
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* false, to decode the next component.
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* Returned:
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* true if there is more to decode or false if we are done or error.
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*
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* Example:
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* struct pnfs_osd_xdr_decode_layout_iter iter;
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* struct pnfs_osd_layout layout;
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* struct pnfs_osd_object_cred comp;
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* int status;
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*
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* status = pnfs_osd_xdr_decode_layout_map(&layout, &iter, xdr);
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* if (unlikely(status))
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* goto err;
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* while(pnfs_osd_xdr_decode_layout_comp(&comp, &iter, xdr, &status)) {
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* // All of @comp strings point to inside the xdr_buffer
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* // or scrach buffer. Copy them out to user memory eg.
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* copy_single_comp(dest_comp++, &comp);
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* }
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* if (unlikely(status))
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* goto err;
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*/
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struct pnfs_osd_xdr_decode_layout_iter {
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unsigned total_comps;
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unsigned decoded_comps;
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};
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extern int pnfs_osd_xdr_decode_layout_map(struct pnfs_osd_layout *layout,
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struct pnfs_osd_xdr_decode_layout_iter *iter, struct xdr_stream *xdr);
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extern bool pnfs_osd_xdr_decode_layout_comp(struct pnfs_osd_object_cred *comp,
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struct pnfs_osd_xdr_decode_layout_iter *iter, struct xdr_stream *xdr,
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int *err);
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/* Device Info helpers */
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/* Note: All strings inside @deviceaddr point to space inside @p.
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* @p should stay valid while @deviceaddr is in use.
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*/
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extern void pnfs_osd_xdr_decode_deviceaddr(
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struct pnfs_osd_deviceaddr *deviceaddr, __be32 *p);
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/* layoutupdate (layout_commit) xdr helpers */
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extern int
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pnfs_osd_xdr_encode_layoutupdate(struct xdr_stream *xdr,
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struct pnfs_osd_layoutupdate *lou);
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/* osd_ioerror encoding (layout_return) */
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extern __be32 *pnfs_osd_xdr_ioerr_reserve_space(struct xdr_stream *xdr);
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extern void pnfs_osd_xdr_encode_ioerr(__be32 *p, struct pnfs_osd_ioerr *ioerr);
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#endif /* __PNFS_OSD_XDR_H__ */
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