summaryrefslogtreecommitdiffstats
path: root/include/linux/pnfs_osd_xdr.h
blob: 435dd5fa7453144b459253d1cb339f981ef7b5f7 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
/*
 *  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;
	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__ */