diff options
Diffstat (limited to 'kernel/include/linux/pnfs_osd_xdr.h')
| -rw-r--r-- | kernel/include/linux/pnfs_osd_xdr.h | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/kernel/include/linux/pnfs_osd_xdr.h b/kernel/include/linux/pnfs_osd_xdr.h new file mode 100644 index 000000000..17d7d0d20 --- /dev/null +++ b/kernel/include/linux/pnfs_osd_xdr.h @@ -0,0 +1,317 @@ +/* + * 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__ */ |