2 * pNFS-osd on-the-wire data structures
4 * Copyright (C) 2007 Panasas Inc. [year of first publication]
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2
12 * See the file COPYING included with this distribution for more details.
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 3. Neither the name of the Panasas company nor the names of its
24 * contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
28 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
29 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
30 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
34 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
35 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
36 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
37 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #ifndef __PNFS_OSD_XDR_H__
40 #define __PNFS_OSD_XDR_H__
42 #include <linux/nfs_fs.h>
43 #include <linux/nfs_page.h>
46 * draft-ietf-nfsv4-minorversion-22
47 * draft-ietf-nfsv4-pnfs-obj-12
50 /* Layout Structure */
52 enum pnfs_osd_raid_algorithm4 {
56 PNFS_OSD_RAID_PQ = 4 /* Reed-Solomon P+Q */
59 /* struct pnfs_osd_data_map4 {
60 * uint32_t odm_num_comps;
61 * length4 odm_stripe_unit;
62 * uint32_t odm_group_width;
63 * uint32_t odm_group_depth;
64 * uint32_t odm_mirror_cnt;
65 * pnfs_osd_raid_algorithm4 odm_raid_algorithm;
68 struct pnfs_osd_data_map {
74 u32 odm_raid_algorithm;
77 /* struct pnfs_osd_objid4 {
78 * deviceid4 oid_device_id;
79 * uint64_t oid_partition_id;
80 * uint64_t oid_object_id;
83 struct pnfs_osd_objid {
84 struct nfs4_deviceid oid_device_id;
89 /* For printout. I use:
90 * kprint("dev(%llx:%llx)", _DEVID_LO(pointer), _DEVID_HI(pointer));
93 #define _DEVID_LO(oid_device_id) \
94 (unsigned long long)be64_to_cpup((__be64 *)(oid_device_id)->data)
96 #define _DEVID_HI(oid_device_id) \
97 (unsigned long long)be64_to_cpup(((__be64 *)(oid_device_id)->data) + 1)
99 enum pnfs_osd_version {
100 PNFS_OSD_MISSING = 0,
101 PNFS_OSD_VERSION_1 = 1,
102 PNFS_OSD_VERSION_2 = 2
105 struct pnfs_osd_opaque_cred {
110 enum pnfs_osd_cap_key_sec {
111 PNFS_OSD_CAP_KEY_SEC_NONE = 0,
112 PNFS_OSD_CAP_KEY_SEC_SSV = 1,
115 /* struct pnfs_osd_object_cred4 {
116 * pnfs_osd_objid4 oc_object_id;
117 * pnfs_osd_version4 oc_osd_version;
118 * pnfs_osd_cap_key_sec4 oc_cap_key_sec;
119 * opaque oc_capability_key<>;
120 * opaque oc_capability<>;
123 struct pnfs_osd_object_cred {
124 struct pnfs_osd_objid oc_object_id;
127 struct pnfs_osd_opaque_cred oc_cap_key;
128 struct pnfs_osd_opaque_cred oc_cap;
131 /* struct pnfs_osd_layout4 {
132 * pnfs_osd_data_map4 olo_map;
133 * uint32_t olo_comps_index;
134 * pnfs_osd_object_cred4 olo_components<>;
137 struct pnfs_osd_layout {
138 struct pnfs_osd_data_map olo_map;
141 struct pnfs_osd_object_cred *olo_comps;
145 enum pnfs_osd_targetid_type {
147 OBJ_TARGET_SCSI_NAME = 2,
148 OBJ_TARGET_SCSI_DEVICE_ID = 3,
151 /* union pnfs_osd_targetid4 switch (pnfs_osd_targetid_type4 oti_type) {
152 * case OBJ_TARGET_SCSI_NAME:
153 * string oti_scsi_name<>;
155 * case OBJ_TARGET_SCSI_DEVICE_ID:
156 * opaque oti_scsi_device_id<>;
162 * union pnfs_osd_targetaddr4 switch (bool ota_available) {
164 * netaddr4 ota_netaddr;
169 * struct pnfs_osd_deviceaddr4 {
170 * pnfs_osd_targetid4 oda_targetid;
171 * pnfs_osd_targetaddr4 oda_targetaddr;
173 * opaque oda_systemid<>;
174 * pnfs_osd_object_cred4 oda_root_obj_cred;
175 * opaque oda_osdname<>;
178 struct pnfs_osd_targetid {
180 struct nfs4_string oti_scsi_device_id;
184 * // see struct rpcb in RFC1833
185 * string r_netid<>; // network id
186 * string r_addr<>; // universal address
189 struct pnfs_osd_net_addr {
190 struct nfs4_string r_netid;
191 struct nfs4_string r_addr;
194 struct pnfs_osd_targetaddr {
196 struct pnfs_osd_net_addr ota_netaddr;
199 struct pnfs_osd_deviceaddr {
200 struct pnfs_osd_targetid oda_targetid;
201 struct pnfs_osd_targetaddr oda_targetaddr;
203 struct nfs4_string oda_systemid;
204 struct pnfs_osd_object_cred oda_root_obj_cred;
205 struct nfs4_string oda_osdname;
208 /* LAYOUTCOMMIT: layoutupdate */
210 /* union pnfs_osd_deltaspaceused4 switch (bool dsu_valid) {
217 * struct pnfs_osd_layoutupdate4 {
218 * pnfs_osd_deltaspaceused4 olu_delta_space_used;
219 * bool olu_ioerr_flag;
222 struct pnfs_osd_layoutupdate {
228 /* LAYOUTRETURN: I/O Rrror Report */
230 enum pnfs_osd_errno {
231 PNFS_OSD_ERR_EIO = 1,
232 PNFS_OSD_ERR_NOT_FOUND = 2,
233 PNFS_OSD_ERR_NO_SPACE = 3,
234 PNFS_OSD_ERR_BAD_CRED = 4,
235 PNFS_OSD_ERR_NO_ACCESS = 5,
236 PNFS_OSD_ERR_UNREACHABLE = 6,
237 PNFS_OSD_ERR_RESOURCE = 7
240 /* struct pnfs_osd_ioerr4 {
241 * pnfs_osd_objid4 oer_component;
242 * length4 oer_comp_offset;
243 * length4 oer_comp_length;
245 * pnfs_osd_errno4 oer_errno;
248 struct pnfs_osd_ioerr {
249 struct pnfs_osd_objid oer_component;
256 /* OSD XDR Client API */
258 /* Layout decoding is done in two parts:
259 * 1. First Call pnfs_osd_xdr_decode_layout_map to read in only the header part
260 * of the layout. @iter members need not be initialized.
262 * @layout members are set. (@layout->olo_comps set to NULL).
264 * Zero on success, or negative error if passed xdr is broken.
266 * 2. 2nd Call pnfs_osd_xdr_decode_layout_comp() in a loop until it returns
267 * false, to decode the next component.
269 * true if there is more to decode or false if we are done or error.
272 * struct pnfs_osd_xdr_decode_layout_iter iter;
273 * struct pnfs_osd_layout layout;
274 * struct pnfs_osd_object_cred comp;
277 * status = pnfs_osd_xdr_decode_layout_map(&layout, &iter, xdr);
278 * if (unlikely(status))
280 * while(pnfs_osd_xdr_decode_layout_comp(&comp, &iter, xdr, &status)) {
281 * // All of @comp strings point to inside the xdr_buffer
282 * // or scrach buffer. Copy them out to user memory eg.
283 * copy_single_comp(dest_comp++, &comp);
285 * if (unlikely(status))
289 struct pnfs_osd_xdr_decode_layout_iter {
290 unsigned total_comps;
291 unsigned decoded_comps;
294 extern int pnfs_osd_xdr_decode_layout_map(struct pnfs_osd_layout *layout,
295 struct pnfs_osd_xdr_decode_layout_iter *iter, struct xdr_stream *xdr);
297 extern bool pnfs_osd_xdr_decode_layout_comp(struct pnfs_osd_object_cred *comp,
298 struct pnfs_osd_xdr_decode_layout_iter *iter, struct xdr_stream *xdr,
301 /* Device Info helpers */
303 /* Note: All strings inside @deviceaddr point to space inside @p.
304 * @p should stay valid while @deviceaddr is in use.
306 extern void pnfs_osd_xdr_decode_deviceaddr(
307 struct pnfs_osd_deviceaddr *deviceaddr, __be32 *p);
309 /* layoutupdate (layout_commit) xdr helpers */
311 pnfs_osd_xdr_encode_layoutupdate(struct xdr_stream *xdr,
312 struct pnfs_osd_layoutupdate *lou);
314 /* osd_ioerror encoding (layout_return) */
315 extern __be32 *pnfs_osd_xdr_ioerr_reserve_space(struct xdr_stream *xdr);
316 extern void pnfs_osd_xdr_encode_ioerr(__be32 *p, struct pnfs_osd_ioerr *ioerr);
318 #endif /* __PNFS_OSD_XDR_H__ */