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c06b8e5aa2cf3c2a488fa6f5af0455b54cf03e78
[deliverable/linux.git] / drivers / scsi / osd / osd_initiator.c
1 /*
2 * osd_initiator - Main body of the osd initiator library.
3 *
4 * Note: The file does not contain the advanced security functionality which
5 * is only needed by the security_manager's initiators.
6 *
7 * Copyright (C) 2008 Panasas Inc. All rights reserved.
8 *
9 * Authors:
10 * Boaz Harrosh <bharrosh@panasas.com>
11 * Benny Halevy <bhalevy@panasas.com>
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 *
20 * 1. Redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution.
25 * 3. Neither the name of the Panasas company nor the names of its
26 * contributors may be used to endorse or promote products derived
27 * from this software without specific prior written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
30 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
31 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
32 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
36 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
37 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
38 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
39 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40 */
41
42 #include <linux/slab.h>
43 #include <linux/module.h>
44
45 #include <scsi/osd_initiator.h>
46 #include <scsi/osd_sec.h>
47 #include <scsi/osd_attributes.h>
48 #include <scsi/osd_sense.h>
49
50 #include <scsi/scsi_device.h>
51
52 #include "osd_debug.h"
53
54 #ifndef __unused
55 # define __unused __attribute__((unused))
56 #endif
57
58 enum { OSD_REQ_RETRIES = 1 };
59
60 MODULE_AUTHOR("Boaz Harrosh <bharrosh@panasas.com>");
61 MODULE_DESCRIPTION("open-osd initiator library libosd.ko");
62 MODULE_LICENSE("GPL");
63
64 static inline void build_test(void)
65 {
66 /* structures were not packed */
67 BUILD_BUG_ON(sizeof(struct osd_capability) != OSD_CAP_LEN);
68 BUILD_BUG_ON(sizeof(struct osdv2_cdb) != OSD_TOTAL_CDB_LEN);
69 BUILD_BUG_ON(sizeof(struct osdv1_cdb) != OSDv1_TOTAL_CDB_LEN);
70 }
71
72 static const char *_osd_ver_desc(struct osd_request *or)
73 {
74 return osd_req_is_ver1(or) ? "OSD1" : "OSD2";
75 }
76
77 #define ATTR_DEF_RI(id, len) ATTR_DEF(OSD_APAGE_ROOT_INFORMATION, id, len)
78
79 static int _osd_get_print_system_info(struct osd_dev *od,
80 void *caps, struct osd_dev_info *odi)
81 {
82 struct osd_request *or;
83 struct osd_attr get_attrs[] = {
84 ATTR_DEF_RI(OSD_ATTR_RI_VENDOR_IDENTIFICATION, 8),
85 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_IDENTIFICATION, 16),
86 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_MODEL, 32),
87 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_REVISION_LEVEL, 4),
88 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_SERIAL_NUMBER, 64 /*variable*/),
89 ATTR_DEF_RI(OSD_ATTR_RI_OSD_NAME, 64 /*variable*/),
90 ATTR_DEF_RI(OSD_ATTR_RI_TOTAL_CAPACITY, 8),
91 ATTR_DEF_RI(OSD_ATTR_RI_USED_CAPACITY, 8),
92 ATTR_DEF_RI(OSD_ATTR_RI_NUMBER_OF_PARTITIONS, 8),
93 ATTR_DEF_RI(OSD_ATTR_RI_CLOCK, 6),
94 /* IBM-OSD-SIM Has a bug with this one put it last */
95 ATTR_DEF_RI(OSD_ATTR_RI_OSD_SYSTEM_ID, 20),
96 };
97 void *iter = NULL, *pFirst;
98 int nelem = ARRAY_SIZE(get_attrs), a = 0;
99 int ret;
100
101 or = osd_start_request(od, GFP_KERNEL);
102 if (!or)
103 return -ENOMEM;
104
105 /* get attrs */
106 osd_req_get_attributes(or, &osd_root_object);
107 osd_req_add_get_attr_list(or, get_attrs, ARRAY_SIZE(get_attrs));
108
109 ret = osd_finalize_request(or, 0, caps, NULL);
110 if (ret)
111 goto out;
112
113 ret = osd_execute_request(or);
114 if (ret) {
115 OSD_ERR("Failed to detect %s => %d\n", _osd_ver_desc(or), ret);
116 goto out;
117 }
118
119 osd_req_decode_get_attr_list(or, get_attrs, &nelem, &iter);
120
121 OSD_INFO("Detected %s device\n",
122 _osd_ver_desc(or));
123
124 pFirst = get_attrs[a++].val_ptr;
125 OSD_INFO("VENDOR_IDENTIFICATION [%s]\n",
126 (char *)pFirst);
127
128 pFirst = get_attrs[a++].val_ptr;
129 OSD_INFO("PRODUCT_IDENTIFICATION [%s]\n",
130 (char *)pFirst);
131
132 pFirst = get_attrs[a++].val_ptr;
133 OSD_INFO("PRODUCT_MODEL [%s]\n",
134 (char *)pFirst);
135
136 pFirst = get_attrs[a++].val_ptr;
137 OSD_INFO("PRODUCT_REVISION_LEVEL [%u]\n",
138 pFirst ? get_unaligned_be32(pFirst) : ~0U);
139
140 pFirst = get_attrs[a++].val_ptr;
141 OSD_INFO("PRODUCT_SERIAL_NUMBER [%s]\n",
142 (char *)pFirst);
143
144 odi->osdname_len = get_attrs[a].len;
145 /* Avoid NULL for memcmp optimization 0-length is good enough */
146 odi->osdname = kzalloc(odi->osdname_len + 1, GFP_KERNEL);
147 if (odi->osdname_len)
148 memcpy(odi->osdname, get_attrs[a].val_ptr, odi->osdname_len);
149 OSD_INFO("OSD_NAME [%s]\n", odi->osdname);
150 a++;
151
152 pFirst = get_attrs[a++].val_ptr;
153 OSD_INFO("TOTAL_CAPACITY [0x%llx]\n",
154 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
155
156 pFirst = get_attrs[a++].val_ptr;
157 OSD_INFO("USED_CAPACITY [0x%llx]\n",
158 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
159
160 pFirst = get_attrs[a++].val_ptr;
161 OSD_INFO("NUMBER_OF_PARTITIONS [%llu]\n",
162 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
163
164 if (a >= nelem)
165 goto out;
166
167 /* FIXME: Where are the time utilities */
168 pFirst = get_attrs[a++].val_ptr;
169 OSD_INFO("CLOCK [0x%02x%02x%02x%02x%02x%02x]\n",
170 ((char *)pFirst)[0], ((char *)pFirst)[1],
171 ((char *)pFirst)[2], ((char *)pFirst)[3],
172 ((char *)pFirst)[4], ((char *)pFirst)[5]);
173
174 if (a < nelem) { /* IBM-OSD-SIM bug, Might not have it */
175 unsigned len = get_attrs[a].len;
176 char sid_dump[32*4 + 2]; /* 2nibbles+space+ASCII */
177
178 hex_dump_to_buffer(get_attrs[a].val_ptr, len, 32, 1,
179 sid_dump, sizeof(sid_dump), true);
180 OSD_INFO("OSD_SYSTEM_ID(%d)\n"
181 " [%s]\n", len, sid_dump);
182
183 if (unlikely(len > sizeof(odi->systemid))) {
184 OSD_ERR("OSD Target error: OSD_SYSTEM_ID too long(%d). "
185 "device idetification might not work\n", len);
186 len = sizeof(odi->systemid);
187 }
188 odi->systemid_len = len;
189 memcpy(odi->systemid, get_attrs[a].val_ptr, len);
190 a++;
191 }
192 out:
193 osd_end_request(or);
194 return ret;
195 }
196
197 int osd_auto_detect_ver(struct osd_dev *od,
198 void *caps, struct osd_dev_info *odi)
199 {
200 int ret;
201
202 /* Auto-detect the osd version */
203 ret = _osd_get_print_system_info(od, caps, odi);
204 if (ret) {
205 osd_dev_set_ver(od, OSD_VER1);
206 OSD_DEBUG("converting to OSD1\n");
207 ret = _osd_get_print_system_info(od, caps, odi);
208 }
209
210 return ret;
211 }
212 EXPORT_SYMBOL(osd_auto_detect_ver);
213
214 static unsigned _osd_req_cdb_len(struct osd_request *or)
215 {
216 return osd_req_is_ver1(or) ? OSDv1_TOTAL_CDB_LEN : OSD_TOTAL_CDB_LEN;
217 }
218
219 static unsigned _osd_req_alist_elem_size(struct osd_request *or, unsigned len)
220 {
221 return osd_req_is_ver1(or) ?
222 osdv1_attr_list_elem_size(len) :
223 osdv2_attr_list_elem_size(len);
224 }
225
226 static void _osd_req_alist_elem_encode(struct osd_request *or,
227 void *attr_last, const struct osd_attr *oa)
228 {
229 if (osd_req_is_ver1(or)) {
230 struct osdv1_attributes_list_element *attr = attr_last;
231
232 attr->attr_page = cpu_to_be32(oa->attr_page);
233 attr->attr_id = cpu_to_be32(oa->attr_id);
234 attr->attr_bytes = cpu_to_be16(oa->len);
235 memcpy(attr->attr_val, oa->val_ptr, oa->len);
236 } else {
237 struct osdv2_attributes_list_element *attr = attr_last;
238
239 attr->attr_page = cpu_to_be32(oa->attr_page);
240 attr->attr_id = cpu_to_be32(oa->attr_id);
241 attr->attr_bytes = cpu_to_be16(oa->len);
242 memcpy(attr->attr_val, oa->val_ptr, oa->len);
243 }
244 }
245
246 static int _osd_req_alist_elem_decode(struct osd_request *or,
247 void *cur_p, struct osd_attr *oa, unsigned max_bytes)
248 {
249 unsigned inc;
250 if (osd_req_is_ver1(or)) {
251 struct osdv1_attributes_list_element *attr = cur_p;
252
253 if (max_bytes < sizeof(*attr))
254 return -1;
255
256 oa->len = be16_to_cpu(attr->attr_bytes);
257 inc = _osd_req_alist_elem_size(or, oa->len);
258 if (inc > max_bytes)
259 return -1;
260
261 oa->attr_page = be32_to_cpu(attr->attr_page);
262 oa->attr_id = be32_to_cpu(attr->attr_id);
263
264 /* OSD1: On empty attributes we return a pointer to 2 bytes
265 * of zeros. This keeps similar behaviour with OSD2.
266 * (See below)
267 */
268 oa->val_ptr = likely(oa->len) ? attr->attr_val :
269 (u8 *)&attr->attr_bytes;
270 } else {
271 struct osdv2_attributes_list_element *attr = cur_p;
272
273 if (max_bytes < sizeof(*attr))
274 return -1;
275
276 oa->len = be16_to_cpu(attr->attr_bytes);
277 inc = _osd_req_alist_elem_size(or, oa->len);
278 if (inc > max_bytes)
279 return -1;
280
281 oa->attr_page = be32_to_cpu(attr->attr_page);
282 oa->attr_id = be32_to_cpu(attr->attr_id);
283
284 /* OSD2: For convenience, on empty attributes, we return 8 bytes
285 * of zeros here. This keeps the same behaviour with OSD2r04,
286 * and is nice with null terminating ASCII fields.
287 * oa->val_ptr == NULL marks the end-of-list, or error.
288 */
289 oa->val_ptr = likely(oa->len) ? attr->attr_val : attr->reserved;
290 }
291 return inc;
292 }
293
294 static unsigned _osd_req_alist_size(struct osd_request *or, void *list_head)
295 {
296 return osd_req_is_ver1(or) ?
297 osdv1_list_size(list_head) :
298 osdv2_list_size(list_head);
299 }
300
301 static unsigned _osd_req_sizeof_alist_header(struct osd_request *or)
302 {
303 return osd_req_is_ver1(or) ?
304 sizeof(struct osdv1_attributes_list_header) :
305 sizeof(struct osdv2_attributes_list_header);
306 }
307
308 static void _osd_req_set_alist_type(struct osd_request *or,
309 void *list, int list_type)
310 {
311 if (osd_req_is_ver1(or)) {
312 struct osdv1_attributes_list_header *attr_list = list;
313
314 memset(attr_list, 0, sizeof(*attr_list));
315 attr_list->type = list_type;
316 } else {
317 struct osdv2_attributes_list_header *attr_list = list;
318
319 memset(attr_list, 0, sizeof(*attr_list));
320 attr_list->type = list_type;
321 }
322 }
323
324 static bool _osd_req_is_alist_type(struct osd_request *or,
325 void *list, int list_type)
326 {
327 if (!list)
328 return false;
329
330 if (osd_req_is_ver1(or)) {
331 struct osdv1_attributes_list_header *attr_list = list;
332
333 return attr_list->type == list_type;
334 } else {
335 struct osdv2_attributes_list_header *attr_list = list;
336
337 return attr_list->type == list_type;
338 }
339 }
340
341 /* This is for List-objects not Attributes-Lists */
342 static void _osd_req_encode_olist(struct osd_request *or,
343 struct osd_obj_id_list *list)
344 {
345 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
346
347 if (osd_req_is_ver1(or)) {
348 cdbh->v1.list_identifier = list->list_identifier;
349 cdbh->v1.start_address = list->continuation_id;
350 } else {
351 cdbh->v2.list_identifier = list->list_identifier;
352 cdbh->v2.start_address = list->continuation_id;
353 }
354 }
355
356 static osd_cdb_offset osd_req_encode_offset(struct osd_request *or,
357 u64 offset, unsigned *padding)
358 {
359 return __osd_encode_offset(offset, padding,
360 osd_req_is_ver1(or) ?
361 OSDv1_OFFSET_MIN_SHIFT : OSD_OFFSET_MIN_SHIFT,
362 OSD_OFFSET_MAX_SHIFT);
363 }
364
365 static struct osd_security_parameters *
366 _osd_req_sec_params(struct osd_request *or)
367 {
368 struct osd_cdb *ocdb = &or->cdb;
369
370 if (osd_req_is_ver1(or))
371 return (struct osd_security_parameters *)&ocdb->v1.sec_params;
372 else
373 return (struct osd_security_parameters *)&ocdb->v2.sec_params;
374 }
375
376 void osd_dev_init(struct osd_dev *osdd, struct scsi_device *scsi_device)
377 {
378 memset(osdd, 0, sizeof(*osdd));
379 osdd->scsi_device = scsi_device;
380 osdd->def_timeout = BLK_DEFAULT_SG_TIMEOUT;
381 #ifdef OSD_VER1_SUPPORT
382 osdd->version = OSD_VER2;
383 #endif
384 /* TODO: Allocate pools for osd_request attributes ... */
385 }
386 EXPORT_SYMBOL(osd_dev_init);
387
388 void osd_dev_fini(struct osd_dev *osdd)
389 {
390 /* TODO: De-allocate pools */
391
392 osdd->scsi_device = NULL;
393 }
394 EXPORT_SYMBOL(osd_dev_fini);
395
396 static struct osd_request *_osd_request_alloc(gfp_t gfp)
397 {
398 struct osd_request *or;
399
400 /* TODO: Use mempool with one saved request */
401 or = kzalloc(sizeof(*or), gfp);
402 return or;
403 }
404
405 static void _osd_request_free(struct osd_request *or)
406 {
407 kfree(or);
408 }
409
410 struct osd_request *osd_start_request(struct osd_dev *dev, gfp_t gfp)
411 {
412 struct osd_request *or;
413
414 or = _osd_request_alloc(gfp);
415 if (!or)
416 return NULL;
417
418 or->osd_dev = dev;
419 or->alloc_flags = gfp;
420 or->timeout = dev->def_timeout;
421 or->retries = OSD_REQ_RETRIES;
422
423 return or;
424 }
425 EXPORT_SYMBOL(osd_start_request);
426
427 static void _osd_free_seg(struct osd_request *or __unused,
428 struct _osd_req_data_segment *seg)
429 {
430 if (!seg->buff || !seg->alloc_size)
431 return;
432
433 kfree(seg->buff);
434 seg->buff = NULL;
435 seg->alloc_size = 0;
436 }
437
438 static void _put_request(struct request *rq)
439 {
440 /*
441 * If osd_finalize_request() was called but the request was not
442 * executed through the block layer, then we must release BIOs.
443 * TODO: Keep error code in or->async_error. Need to audit all
444 * code paths.
445 */
446 if (unlikely(rq->bio))
447 blk_end_request(rq, -ENOMEM, blk_rq_bytes(rq));
448 else
449 blk_put_request(rq);
450 }
451
452 void osd_end_request(struct osd_request *or)
453 {
454 struct request *rq = or->request;
455
456 if (rq) {
457 if (rq->next_rq) {
458 _put_request(rq->next_rq);
459 rq->next_rq = NULL;
460 }
461
462 _put_request(rq);
463 }
464
465 _osd_free_seg(or, &or->get_attr);
466 _osd_free_seg(or, &or->enc_get_attr);
467 _osd_free_seg(or, &or->set_attr);
468 _osd_free_seg(or, &or->cdb_cont);
469
470 _osd_request_free(or);
471 }
472 EXPORT_SYMBOL(osd_end_request);
473
474 static void _set_error_resid(struct osd_request *or, struct request *req,
475 int error)
476 {
477 or->async_error = error;
478 or->req_errors = req->errors ? : error;
479 or->sense_len = req->sense_len;
480 if (or->out.req)
481 or->out.residual = or->out.req->resid_len;
482 if (or->in.req)
483 or->in.residual = or->in.req->resid_len;
484 }
485
486 int osd_execute_request(struct osd_request *or)
487 {
488 int error = blk_execute_rq(or->request->q, NULL, or->request, 0);
489
490 _set_error_resid(or, or->request, error);
491 return error;
492 }
493 EXPORT_SYMBOL(osd_execute_request);
494
495 static void osd_request_async_done(struct request *req, int error)
496 {
497 struct osd_request *or = req->end_io_data;
498
499 _set_error_resid(or, req, error);
500 if (req->next_rq) {
501 __blk_put_request(req->q, req->next_rq);
502 req->next_rq = NULL;
503 }
504
505 __blk_put_request(req->q, req);
506 or->request = NULL;
507 or->in.req = NULL;
508 or->out.req = NULL;
509
510 if (or->async_done)
511 or->async_done(or, or->async_private);
512 else
513 osd_end_request(or);
514 }
515
516 int osd_execute_request_async(struct osd_request *or,
517 osd_req_done_fn *done, void *private)
518 {
519 or->request->end_io_data = or;
520 or->async_private = private;
521 or->async_done = done;
522
523 blk_execute_rq_nowait(or->request->q, NULL, or->request, 0,
524 osd_request_async_done);
525 return 0;
526 }
527 EXPORT_SYMBOL(osd_execute_request_async);
528
529 u8 sg_out_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
530 u8 sg_in_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
531
532 static int _osd_realloc_seg(struct osd_request *or,
533 struct _osd_req_data_segment *seg, unsigned max_bytes)
534 {
535 void *buff;
536
537 if (seg->alloc_size >= max_bytes)
538 return 0;
539
540 buff = krealloc(seg->buff, max_bytes, or->alloc_flags);
541 if (!buff) {
542 OSD_ERR("Failed to Realloc %d-bytes was-%d\n", max_bytes,
543 seg->alloc_size);
544 return -ENOMEM;
545 }
546
547 memset(buff + seg->alloc_size, 0, max_bytes - seg->alloc_size);
548 seg->buff = buff;
549 seg->alloc_size = max_bytes;
550 return 0;
551 }
552
553 static int _alloc_cdb_cont(struct osd_request *or, unsigned total_bytes)
554 {
555 OSD_DEBUG("total_bytes=%d\n", total_bytes);
556 return _osd_realloc_seg(or, &or->cdb_cont, total_bytes);
557 }
558
559 static int _alloc_set_attr_list(struct osd_request *or,
560 const struct osd_attr *oa, unsigned nelem, unsigned add_bytes)
561 {
562 unsigned total_bytes = add_bytes;
563
564 for (; nelem; --nelem, ++oa)
565 total_bytes += _osd_req_alist_elem_size(or, oa->len);
566
567 OSD_DEBUG("total_bytes=%d\n", total_bytes);
568 return _osd_realloc_seg(or, &or->set_attr, total_bytes);
569 }
570
571 static int _alloc_get_attr_desc(struct osd_request *or, unsigned max_bytes)
572 {
573 OSD_DEBUG("total_bytes=%d\n", max_bytes);
574 return _osd_realloc_seg(or, &or->enc_get_attr, max_bytes);
575 }
576
577 static int _alloc_get_attr_list(struct osd_request *or)
578 {
579 OSD_DEBUG("total_bytes=%d\n", or->get_attr.total_bytes);
580 return _osd_realloc_seg(or, &or->get_attr, or->get_attr.total_bytes);
581 }
582
583 /*
584 * Common to all OSD commands
585 */
586
587 static void _osdv1_req_encode_common(struct osd_request *or,
588 __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
589 {
590 struct osdv1_cdb *ocdb = &or->cdb.v1;
591
592 /*
593 * For speed, the commands
594 * OSD_ACT_PERFORM_SCSI_COMMAND , V1 0x8F7E, V2 0x8F7C
595 * OSD_ACT_SCSI_TASK_MANAGEMENT , V1 0x8F7F, V2 0x8F7D
596 * are not supported here. Should pass zero and set after the call
597 */
598 act &= cpu_to_be16(~0x0080); /* V1 action code */
599
600 OSD_DEBUG("OSDv1 execute opcode 0x%x\n", be16_to_cpu(act));
601
602 ocdb->h.varlen_cdb.opcode = VARIABLE_LENGTH_CMD;
603 ocdb->h.varlen_cdb.additional_cdb_length = OSD_ADDITIONAL_CDB_LENGTH;
604 ocdb->h.varlen_cdb.service_action = act;
605
606 ocdb->h.partition = cpu_to_be64(obj->partition);
607 ocdb->h.object = cpu_to_be64(obj->id);
608 ocdb->h.v1.length = cpu_to_be64(len);
609 ocdb->h.v1.start_address = cpu_to_be64(offset);
610 }
611
612 static void _osdv2_req_encode_common(struct osd_request *or,
613 __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
614 {
615 struct osdv2_cdb *ocdb = &or->cdb.v2;
616
617 OSD_DEBUG("OSDv2 execute opcode 0x%x\n", be16_to_cpu(act));
618
619 ocdb->h.varlen_cdb.opcode = VARIABLE_LENGTH_CMD;
620 ocdb->h.varlen_cdb.additional_cdb_length = OSD_ADDITIONAL_CDB_LENGTH;
621 ocdb->h.varlen_cdb.service_action = act;
622
623 ocdb->h.partition = cpu_to_be64(obj->partition);
624 ocdb->h.object = cpu_to_be64(obj->id);
625 ocdb->h.v2.length = cpu_to_be64(len);
626 ocdb->h.v2.start_address = cpu_to_be64(offset);
627 }
628
629 static void _osd_req_encode_common(struct osd_request *or,
630 __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
631 {
632 if (osd_req_is_ver1(or))
633 _osdv1_req_encode_common(or, act, obj, offset, len);
634 else
635 _osdv2_req_encode_common(or, act, obj, offset, len);
636 }
637
638 /*
639 * Device commands
640 */
641 /*TODO: void osd_req_set_master_seed_xchg(struct osd_request *, ...); */
642 /*TODO: void osd_req_set_master_key(struct osd_request *, ...); */
643
644 void osd_req_format(struct osd_request *or, u64 tot_capacity)
645 {
646 _osd_req_encode_common(or, OSD_ACT_FORMAT_OSD, &osd_root_object, 0,
647 tot_capacity);
648 }
649 EXPORT_SYMBOL(osd_req_format);
650
651 int osd_req_list_dev_partitions(struct osd_request *or,
652 osd_id initial_id, struct osd_obj_id_list *list, unsigned nelem)
653 {
654 return osd_req_list_partition_objects(or, 0, initial_id, list, nelem);
655 }
656 EXPORT_SYMBOL(osd_req_list_dev_partitions);
657
658 static void _osd_req_encode_flush(struct osd_request *or,
659 enum osd_options_flush_scope_values op)
660 {
661 struct osd_cdb_head *ocdb = osd_cdb_head(&or->cdb);
662
663 ocdb->command_specific_options = op;
664 }
665
666 void osd_req_flush_obsd(struct osd_request *or,
667 enum osd_options_flush_scope_values op)
668 {
669 _osd_req_encode_common(or, OSD_ACT_FLUSH_OSD, &osd_root_object, 0, 0);
670 _osd_req_encode_flush(or, op);
671 }
672 EXPORT_SYMBOL(osd_req_flush_obsd);
673
674 /*TODO: void osd_req_perform_scsi_command(struct osd_request *,
675 const u8 *cdb, ...); */
676 /*TODO: void osd_req_task_management(struct osd_request *, ...); */
677
678 /*
679 * Partition commands
680 */
681 static void _osd_req_encode_partition(struct osd_request *or,
682 __be16 act, osd_id partition)
683 {
684 struct osd_obj_id par = {
685 .partition = partition,
686 .id = 0,
687 };
688
689 _osd_req_encode_common(or, act, &par, 0, 0);
690 }
691
692 void osd_req_create_partition(struct osd_request *or, osd_id partition)
693 {
694 _osd_req_encode_partition(or, OSD_ACT_CREATE_PARTITION, partition);
695 }
696 EXPORT_SYMBOL(osd_req_create_partition);
697
698 void osd_req_remove_partition(struct osd_request *or, osd_id partition)
699 {
700 _osd_req_encode_partition(or, OSD_ACT_REMOVE_PARTITION, partition);
701 }
702 EXPORT_SYMBOL(osd_req_remove_partition);
703
704 /*TODO: void osd_req_set_partition_key(struct osd_request *,
705 osd_id partition, u8 new_key_id[OSD_CRYPTO_KEYID_SIZE],
706 u8 seed[OSD_CRYPTO_SEED_SIZE]); */
707
708 static int _osd_req_list_objects(struct osd_request *or,
709 __be16 action, const struct osd_obj_id *obj, osd_id initial_id,
710 struct osd_obj_id_list *list, unsigned nelem)
711 {
712 struct request_queue *q = osd_request_queue(or->osd_dev);
713 u64 len = nelem * sizeof(osd_id) + sizeof(*list);
714 struct bio *bio;
715
716 _osd_req_encode_common(or, action, obj, (u64)initial_id, len);
717
718 if (list->list_identifier)
719 _osd_req_encode_olist(or, list);
720
721 WARN_ON(or->in.bio);
722 bio = bio_map_kern(q, list, len, or->alloc_flags);
723 if (IS_ERR(bio)) {
724 OSD_ERR("!!! Failed to allocate list_objects BIO\n");
725 return PTR_ERR(bio);
726 }
727
728 bio->bi_rw &= ~REQ_WRITE;
729 or->in.bio = bio;
730 or->in.total_bytes = bio->bi_size;
731 return 0;
732 }
733
734 int osd_req_list_partition_collections(struct osd_request *or,
735 osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
736 unsigned nelem)
737 {
738 struct osd_obj_id par = {
739 .partition = partition,
740 .id = 0,
741 };
742
743 return osd_req_list_collection_objects(or, &par, initial_id, list,
744 nelem);
745 }
746 EXPORT_SYMBOL(osd_req_list_partition_collections);
747
748 int osd_req_list_partition_objects(struct osd_request *or,
749 osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
750 unsigned nelem)
751 {
752 struct osd_obj_id par = {
753 .partition = partition,
754 .id = 0,
755 };
756
757 return _osd_req_list_objects(or, OSD_ACT_LIST, &par, initial_id, list,
758 nelem);
759 }
760 EXPORT_SYMBOL(osd_req_list_partition_objects);
761
762 void osd_req_flush_partition(struct osd_request *or,
763 osd_id partition, enum osd_options_flush_scope_values op)
764 {
765 _osd_req_encode_partition(or, OSD_ACT_FLUSH_PARTITION, partition);
766 _osd_req_encode_flush(or, op);
767 }
768 EXPORT_SYMBOL(osd_req_flush_partition);
769
770 /*
771 * Collection commands
772 */
773 /*TODO: void osd_req_create_collection(struct osd_request *,
774 const struct osd_obj_id *); */
775 /*TODO: void osd_req_remove_collection(struct osd_request *,
776 const struct osd_obj_id *); */
777
778 int osd_req_list_collection_objects(struct osd_request *or,
779 const struct osd_obj_id *obj, osd_id initial_id,
780 struct osd_obj_id_list *list, unsigned nelem)
781 {
782 return _osd_req_list_objects(or, OSD_ACT_LIST_COLLECTION, obj,
783 initial_id, list, nelem);
784 }
785 EXPORT_SYMBOL(osd_req_list_collection_objects);
786
787 /*TODO: void query(struct osd_request *, ...); V2 */
788
789 void osd_req_flush_collection(struct osd_request *or,
790 const struct osd_obj_id *obj, enum osd_options_flush_scope_values op)
791 {
792 _osd_req_encode_common(or, OSD_ACT_FLUSH_PARTITION, obj, 0, 0);
793 _osd_req_encode_flush(or, op);
794 }
795 EXPORT_SYMBOL(osd_req_flush_collection);
796
797 /*TODO: void get_member_attrs(struct osd_request *, ...); V2 */
798 /*TODO: void set_member_attrs(struct osd_request *, ...); V2 */
799
800 /*
801 * Object commands
802 */
803 void osd_req_create_object(struct osd_request *or, struct osd_obj_id *obj)
804 {
805 _osd_req_encode_common(or, OSD_ACT_CREATE, obj, 0, 0);
806 }
807 EXPORT_SYMBOL(osd_req_create_object);
808
809 void osd_req_remove_object(struct osd_request *or, struct osd_obj_id *obj)
810 {
811 _osd_req_encode_common(or, OSD_ACT_REMOVE, obj, 0, 0);
812 }
813 EXPORT_SYMBOL(osd_req_remove_object);
814
815
816 /*TODO: void osd_req_create_multi(struct osd_request *or,
817 struct osd_obj_id *first, struct osd_obj_id_list *list, unsigned nelem);
818 */
819
820 void osd_req_write(struct osd_request *or,
821 const struct osd_obj_id *obj, u64 offset,
822 struct bio *bio, u64 len)
823 {
824 _osd_req_encode_common(or, OSD_ACT_WRITE, obj, offset, len);
825 WARN_ON(or->out.bio || or->out.total_bytes);
826 WARN_ON(0 == (bio->bi_rw & REQ_WRITE));
827 or->out.bio = bio;
828 or->out.total_bytes = len;
829 }
830 EXPORT_SYMBOL(osd_req_write);
831
832 int osd_req_write_kern(struct osd_request *or,
833 const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
834 {
835 struct request_queue *req_q = osd_request_queue(or->osd_dev);
836 struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
837
838 if (IS_ERR(bio))
839 return PTR_ERR(bio);
840
841 bio->bi_rw |= REQ_WRITE; /* FIXME: bio_set_dir() */
842 osd_req_write(or, obj, offset, bio, len);
843 return 0;
844 }
845 EXPORT_SYMBOL(osd_req_write_kern);
846
847 /*TODO: void osd_req_append(struct osd_request *,
848 const struct osd_obj_id *, struct bio *data_out); */
849 /*TODO: void osd_req_create_write(struct osd_request *,
850 const struct osd_obj_id *, struct bio *data_out, u64 offset); */
851 /*TODO: void osd_req_clear(struct osd_request *,
852 const struct osd_obj_id *, u64 offset, u64 len); */
853 /*TODO: void osd_req_punch(struct osd_request *,
854 const struct osd_obj_id *, u64 offset, u64 len); V2 */
855
856 void osd_req_flush_object(struct osd_request *or,
857 const struct osd_obj_id *obj, enum osd_options_flush_scope_values op,
858 /*V2*/ u64 offset, /*V2*/ u64 len)
859 {
860 if (unlikely(osd_req_is_ver1(or) && (offset || len))) {
861 OSD_DEBUG("OSD Ver1 flush on specific range ignored\n");
862 offset = 0;
863 len = 0;
864 }
865
866 _osd_req_encode_common(or, OSD_ACT_FLUSH, obj, offset, len);
867 _osd_req_encode_flush(or, op);
868 }
869 EXPORT_SYMBOL(osd_req_flush_object);
870
871 void osd_req_read(struct osd_request *or,
872 const struct osd_obj_id *obj, u64 offset,
873 struct bio *bio, u64 len)
874 {
875 _osd_req_encode_common(or, OSD_ACT_READ, obj, offset, len);
876 WARN_ON(or->in.bio || or->in.total_bytes);
877 WARN_ON(bio->bi_rw & REQ_WRITE);
878 or->in.bio = bio;
879 or->in.total_bytes = len;
880 }
881 EXPORT_SYMBOL(osd_req_read);
882
883 int osd_req_read_kern(struct osd_request *or,
884 const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
885 {
886 struct request_queue *req_q = osd_request_queue(or->osd_dev);
887 struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
888
889 if (IS_ERR(bio))
890 return PTR_ERR(bio);
891
892 osd_req_read(or, obj, offset, bio, len);
893 return 0;
894 }
895 EXPORT_SYMBOL(osd_req_read_kern);
896
897 static int _add_sg_continuation_descriptor(struct osd_request *or,
898 const struct osd_sg_entry *sglist, unsigned numentries, u64 *len)
899 {
900 struct osd_sg_continuation_descriptor *oscd;
901 u32 oscd_size;
902 unsigned i;
903 int ret;
904
905 oscd_size = sizeof(*oscd) + numentries * sizeof(oscd->entries[0]);
906
907 if (!or->cdb_cont.total_bytes) {
908 /* First time, jump over the header, we will write to:
909 * cdb_cont.buff + cdb_cont.total_bytes
910 */
911 or->cdb_cont.total_bytes =
912 sizeof(struct osd_continuation_segment_header);
913 }
914
915 ret = _alloc_cdb_cont(or, or->cdb_cont.total_bytes + oscd_size);
916 if (unlikely(ret))
917 return ret;
918
919 oscd = or->cdb_cont.buff + or->cdb_cont.total_bytes;
920 oscd->hdr.type = cpu_to_be16(SCATTER_GATHER_LIST);
921 oscd->hdr.pad_length = 0;
922 oscd->hdr.length = cpu_to_be32(oscd_size - sizeof(*oscd));
923
924 *len = 0;
925 /* copy the sg entries and convert to network byte order */
926 for (i = 0; i < numentries; i++) {
927 oscd->entries[i].offset = cpu_to_be64(sglist[i].offset);
928 oscd->entries[i].len = cpu_to_be64(sglist[i].len);
929 *len += sglist[i].len;
930 }
931
932 or->cdb_cont.total_bytes += oscd_size;
933 OSD_DEBUG("total_bytes=%d oscd_size=%d numentries=%d\n",
934 or->cdb_cont.total_bytes, oscd_size, numentries);
935 return 0;
936 }
937
938 static int _osd_req_finalize_cdb_cont(struct osd_request *or, const u8 *cap_key)
939 {
940 struct request_queue *req_q = osd_request_queue(or->osd_dev);
941 struct bio *bio;
942 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
943 struct osd_continuation_segment_header *cont_seg_hdr;
944
945 if (!or->cdb_cont.total_bytes)
946 return 0;
947
948 cont_seg_hdr = or->cdb_cont.buff;
949 cont_seg_hdr->format = CDB_CONTINUATION_FORMAT_V2;
950 cont_seg_hdr->service_action = cdbh->varlen_cdb.service_action;
951
952 /* create a bio for continuation segment */
953 bio = bio_map_kern(req_q, or->cdb_cont.buff, or->cdb_cont.total_bytes,
954 GFP_KERNEL);
955 if (IS_ERR(bio))
956 return PTR_ERR(bio);
957
958 bio->bi_rw |= REQ_WRITE;
959
960 /* integrity check the continuation before the bio is linked
961 * with the other data segments since the continuation
962 * integrity is separate from the other data segments.
963 */
964 osd_sec_sign_data(cont_seg_hdr->integrity_check, bio, cap_key);
965
966 cdbh->v2.cdb_continuation_length = cpu_to_be32(or->cdb_cont.total_bytes);
967
968 /* we can't use _req_append_segment, because we need to link in the
969 * continuation bio to the head of the bio list - the
970 * continuation segment (if it exists) is always the first segment in
971 * the out data buffer.
972 */
973 bio->bi_next = or->out.bio;
974 or->out.bio = bio;
975 or->out.total_bytes += or->cdb_cont.total_bytes;
976
977 return 0;
978 }
979
980 /* osd_req_write_sg: Takes a @bio that points to the data out buffer and an
981 * @sglist that has the scatter gather entries. Scatter-gather enables a write
982 * of multiple none-contiguous areas of an object, in a single call. The extents
983 * may overlap and/or be in any order. The only constrain is that:
984 * total_bytes(sglist) >= total_bytes(bio)
985 */
986 int osd_req_write_sg(struct osd_request *or,
987 const struct osd_obj_id *obj, struct bio *bio,
988 const struct osd_sg_entry *sglist, unsigned numentries)
989 {
990 u64 len;
991 int ret = _add_sg_continuation_descriptor(or, sglist, numentries, &len);
992
993 if (ret)
994 return ret;
995 osd_req_write(or, obj, 0, bio, len);
996
997 return 0;
998 }
999 EXPORT_SYMBOL(osd_req_write_sg);
1000
1001 /* osd_req_read_sg: Read multiple extents of an object into @bio
1002 * See osd_req_write_sg
1003 */
1004 int osd_req_read_sg(struct osd_request *or,
1005 const struct osd_obj_id *obj, struct bio *bio,
1006 const struct osd_sg_entry *sglist, unsigned numentries)
1007 {
1008 u64 len;
1009 u64 off;
1010 int ret;
1011
1012 if (numentries > 1) {
1013 off = 0;
1014 ret = _add_sg_continuation_descriptor(or, sglist, numentries,
1015 &len);
1016 if (ret)
1017 return ret;
1018 } else {
1019 /* Optimize the case of single segment, read_sg is a
1020 * bidi operation.
1021 */
1022 len = sglist->len;
1023 off = sglist->offset;
1024 }
1025 osd_req_read(or, obj, off, bio, len);
1026
1027 return 0;
1028 }
1029 EXPORT_SYMBOL(osd_req_read_sg);
1030
1031 /* SG-list write/read Kern API
1032 *
1033 * osd_req_{write,read}_sg_kern takes an array of @buff pointers and an array
1034 * of sg_entries. @numentries indicates how many pointers and sg_entries there
1035 * are. By requiring an array of buff pointers. This allows a caller to do a
1036 * single write/read and scatter into multiple buffers.
1037 * NOTE: Each buffer + len should not cross a page boundary.
1038 */
1039 static struct bio *_create_sg_bios(struct osd_request *or,
1040 void **buff, const struct osd_sg_entry *sglist, unsigned numentries)
1041 {
1042 struct request_queue *q = osd_request_queue(or->osd_dev);
1043 struct bio *bio;
1044 unsigned i;
1045
1046 bio = bio_kmalloc(GFP_KERNEL, numentries);
1047 if (unlikely(!bio)) {
1048 OSD_DEBUG("Faild to allocate BIO size=%u\n", numentries);
1049 return ERR_PTR(-ENOMEM);
1050 }
1051
1052 for (i = 0; i < numentries; i++) {
1053 unsigned offset = offset_in_page(buff[i]);
1054 struct page *page = virt_to_page(buff[i]);
1055 unsigned len = sglist[i].len;
1056 unsigned added_len;
1057
1058 BUG_ON(offset + len > PAGE_SIZE);
1059 added_len = bio_add_pc_page(q, bio, page, len, offset);
1060 if (unlikely(len != added_len)) {
1061 OSD_DEBUG("bio_add_pc_page len(%d) != added_len(%d)\n",
1062 len, added_len);
1063 bio_put(bio);
1064 return ERR_PTR(-ENOMEM);
1065 }
1066 }
1067
1068 return bio;
1069 }
1070
1071 int osd_req_write_sg_kern(struct osd_request *or,
1072 const struct osd_obj_id *obj, void **buff,
1073 const struct osd_sg_entry *sglist, unsigned numentries)
1074 {
1075 struct bio *bio = _create_sg_bios(or, buff, sglist, numentries);
1076 if (IS_ERR(bio))
1077 return PTR_ERR(bio);
1078
1079 bio->bi_rw |= REQ_WRITE;
1080 osd_req_write_sg(or, obj, bio, sglist, numentries);
1081
1082 return 0;
1083 }
1084 EXPORT_SYMBOL(osd_req_write_sg_kern);
1085
1086 int osd_req_read_sg_kern(struct osd_request *or,
1087 const struct osd_obj_id *obj, void **buff,
1088 const struct osd_sg_entry *sglist, unsigned numentries)
1089 {
1090 struct bio *bio = _create_sg_bios(or, buff, sglist, numentries);
1091 if (IS_ERR(bio))
1092 return PTR_ERR(bio);
1093
1094 osd_req_read_sg(or, obj, bio, sglist, numentries);
1095
1096 return 0;
1097 }
1098 EXPORT_SYMBOL(osd_req_read_sg_kern);
1099
1100
1101
1102 void osd_req_get_attributes(struct osd_request *or,
1103 const struct osd_obj_id *obj)
1104 {
1105 _osd_req_encode_common(or, OSD_ACT_GET_ATTRIBUTES, obj, 0, 0);
1106 }
1107 EXPORT_SYMBOL(osd_req_get_attributes);
1108
1109 void osd_req_set_attributes(struct osd_request *or,
1110 const struct osd_obj_id *obj)
1111 {
1112 _osd_req_encode_common(or, OSD_ACT_SET_ATTRIBUTES, obj, 0, 0);
1113 }
1114 EXPORT_SYMBOL(osd_req_set_attributes);
1115
1116 /*
1117 * Attributes List-mode
1118 */
1119
1120 int osd_req_add_set_attr_list(struct osd_request *or,
1121 const struct osd_attr *oa, unsigned nelem)
1122 {
1123 unsigned total_bytes = or->set_attr.total_bytes;
1124 void *attr_last;
1125 int ret;
1126
1127 if (or->attributes_mode &&
1128 or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
1129 WARN_ON(1);
1130 return -EINVAL;
1131 }
1132 or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
1133
1134 if (!total_bytes) { /* first-time: allocate and put list header */
1135 total_bytes = _osd_req_sizeof_alist_header(or);
1136 ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
1137 if (ret)
1138 return ret;
1139 _osd_req_set_alist_type(or, or->set_attr.buff,
1140 OSD_ATTR_LIST_SET_RETRIEVE);
1141 }
1142 attr_last = or->set_attr.buff + total_bytes;
1143
1144 for (; nelem; --nelem) {
1145 unsigned elem_size = _osd_req_alist_elem_size(or, oa->len);
1146
1147 total_bytes += elem_size;
1148 if (unlikely(or->set_attr.alloc_size < total_bytes)) {
1149 or->set_attr.total_bytes = total_bytes - elem_size;
1150 ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
1151 if (ret)
1152 return ret;
1153 attr_last =
1154 or->set_attr.buff + or->set_attr.total_bytes;
1155 }
1156
1157 _osd_req_alist_elem_encode(or, attr_last, oa);
1158
1159 attr_last += elem_size;
1160 ++oa;
1161 }
1162
1163 or->set_attr.total_bytes = total_bytes;
1164 return 0;
1165 }
1166 EXPORT_SYMBOL(osd_req_add_set_attr_list);
1167
1168 static int _req_append_segment(struct osd_request *or,
1169 unsigned padding, struct _osd_req_data_segment *seg,
1170 struct _osd_req_data_segment *last_seg, struct _osd_io_info *io)
1171 {
1172 void *pad_buff;
1173 int ret;
1174
1175 if (padding) {
1176 /* check if we can just add it to last buffer */
1177 if (last_seg &&
1178 (padding <= last_seg->alloc_size - last_seg->total_bytes))
1179 pad_buff = last_seg->buff + last_seg->total_bytes;
1180 else
1181 pad_buff = io->pad_buff;
1182
1183 ret = blk_rq_map_kern(io->req->q, io->req, pad_buff, padding,
1184 or->alloc_flags);
1185 if (ret)
1186 return ret;
1187 io->total_bytes += padding;
1188 }
1189
1190 ret = blk_rq_map_kern(io->req->q, io->req, seg->buff, seg->total_bytes,
1191 or->alloc_flags);
1192 if (ret)
1193 return ret;
1194
1195 io->total_bytes += seg->total_bytes;
1196 OSD_DEBUG("padding=%d buff=%p total_bytes=%d\n", padding, seg->buff,
1197 seg->total_bytes);
1198 return 0;
1199 }
1200
1201 static int _osd_req_finalize_set_attr_list(struct osd_request *or)
1202 {
1203 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1204 unsigned padding;
1205 int ret;
1206
1207 if (!or->set_attr.total_bytes) {
1208 cdbh->attrs_list.set_attr_offset = OSD_OFFSET_UNUSED;
1209 return 0;
1210 }
1211
1212 cdbh->attrs_list.set_attr_bytes = cpu_to_be32(or->set_attr.total_bytes);
1213 cdbh->attrs_list.set_attr_offset =
1214 osd_req_encode_offset(or, or->out.total_bytes, &padding);
1215
1216 ret = _req_append_segment(or, padding, &or->set_attr,
1217 or->out.last_seg, &or->out);
1218 if (ret)
1219 return ret;
1220
1221 or->out.last_seg = &or->set_attr;
1222 return 0;
1223 }
1224
1225 int osd_req_add_get_attr_list(struct osd_request *or,
1226 const struct osd_attr *oa, unsigned nelem)
1227 {
1228 unsigned total_bytes = or->enc_get_attr.total_bytes;
1229 void *attr_last;
1230 int ret;
1231
1232 if (or->attributes_mode &&
1233 or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
1234 WARN_ON(1);
1235 return -EINVAL;
1236 }
1237 or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
1238
1239 /* first time calc data-in list header size */
1240 if (!or->get_attr.total_bytes)
1241 or->get_attr.total_bytes = _osd_req_sizeof_alist_header(or);
1242
1243 /* calc data-out info */
1244 if (!total_bytes) { /* first-time: allocate and put list header */
1245 unsigned max_bytes;
1246
1247 total_bytes = _osd_req_sizeof_alist_header(or);
1248 max_bytes = total_bytes +
1249 nelem * sizeof(struct osd_attributes_list_attrid);
1250 ret = _alloc_get_attr_desc(or, max_bytes);
1251 if (ret)
1252 return ret;
1253
1254 _osd_req_set_alist_type(or, or->enc_get_attr.buff,
1255 OSD_ATTR_LIST_GET);
1256 }
1257 attr_last = or->enc_get_attr.buff + total_bytes;
1258
1259 for (; nelem; --nelem) {
1260 struct osd_attributes_list_attrid *attrid;
1261 const unsigned cur_size = sizeof(*attrid);
1262
1263 total_bytes += cur_size;
1264 if (unlikely(or->enc_get_attr.alloc_size < total_bytes)) {
1265 or->enc_get_attr.total_bytes = total_bytes - cur_size;
1266 ret = _alloc_get_attr_desc(or,
1267 total_bytes + nelem * sizeof(*attrid));
1268 if (ret)
1269 return ret;
1270 attr_last = or->enc_get_attr.buff +
1271 or->enc_get_attr.total_bytes;
1272 }
1273
1274 attrid = attr_last;
1275 attrid->attr_page = cpu_to_be32(oa->attr_page);
1276 attrid->attr_id = cpu_to_be32(oa->attr_id);
1277
1278 attr_last += cur_size;
1279
1280 /* calc data-in size */
1281 or->get_attr.total_bytes +=
1282 _osd_req_alist_elem_size(or, oa->len);
1283 ++oa;
1284 }
1285
1286 or->enc_get_attr.total_bytes = total_bytes;
1287
1288 OSD_DEBUG(
1289 "get_attr.total_bytes=%u(%u) enc_get_attr.total_bytes=%u(%Zu)\n",
1290 or->get_attr.total_bytes,
1291 or->get_attr.total_bytes - _osd_req_sizeof_alist_header(or),
1292 or->enc_get_attr.total_bytes,
1293 (or->enc_get_attr.total_bytes - _osd_req_sizeof_alist_header(or))
1294 / sizeof(struct osd_attributes_list_attrid));
1295
1296 return 0;
1297 }
1298 EXPORT_SYMBOL(osd_req_add_get_attr_list);
1299
1300 static int _osd_req_finalize_get_attr_list(struct osd_request *or)
1301 {
1302 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1303 unsigned out_padding;
1304 unsigned in_padding;
1305 int ret;
1306
1307 if (!or->enc_get_attr.total_bytes) {
1308 cdbh->attrs_list.get_attr_desc_offset = OSD_OFFSET_UNUSED;
1309 cdbh->attrs_list.get_attr_offset = OSD_OFFSET_UNUSED;
1310 return 0;
1311 }
1312
1313 ret = _alloc_get_attr_list(or);
1314 if (ret)
1315 return ret;
1316
1317 /* The out-going buffer info update */
1318 OSD_DEBUG("out-going\n");
1319 cdbh->attrs_list.get_attr_desc_bytes =
1320 cpu_to_be32(or->enc_get_attr.total_bytes);
1321
1322 cdbh->attrs_list.get_attr_desc_offset =
1323 osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
1324
1325 ret = _req_append_segment(or, out_padding, &or->enc_get_attr,
1326 or->out.last_seg, &or->out);
1327 if (ret)
1328 return ret;
1329 or->out.last_seg = &or->enc_get_attr;
1330
1331 /* The incoming buffer info update */
1332 OSD_DEBUG("in-coming\n");
1333 cdbh->attrs_list.get_attr_alloc_length =
1334 cpu_to_be32(or->get_attr.total_bytes);
1335
1336 cdbh->attrs_list.get_attr_offset =
1337 osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
1338
1339 ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
1340 &or->in);
1341 if (ret)
1342 return ret;
1343 or->in.last_seg = &or->get_attr;
1344
1345 return 0;
1346 }
1347
1348 int osd_req_decode_get_attr_list(struct osd_request *or,
1349 struct osd_attr *oa, int *nelem, void **iterator)
1350 {
1351 unsigned cur_bytes, returned_bytes;
1352 int n;
1353 const unsigned sizeof_attr_list = _osd_req_sizeof_alist_header(or);
1354 void *cur_p;
1355
1356 if (!_osd_req_is_alist_type(or, or->get_attr.buff,
1357 OSD_ATTR_LIST_SET_RETRIEVE)) {
1358 oa->attr_page = 0;
1359 oa->attr_id = 0;
1360 oa->val_ptr = NULL;
1361 oa->len = 0;
1362 *iterator = NULL;
1363 return 0;
1364 }
1365
1366 if (*iterator) {
1367 BUG_ON((*iterator < or->get_attr.buff) ||
1368 (or->get_attr.buff + or->get_attr.alloc_size < *iterator));
1369 cur_p = *iterator;
1370 cur_bytes = (*iterator - or->get_attr.buff) - sizeof_attr_list;
1371 returned_bytes = or->get_attr.total_bytes;
1372 } else { /* first time decode the list header */
1373 cur_bytes = sizeof_attr_list;
1374 returned_bytes = _osd_req_alist_size(or, or->get_attr.buff) +
1375 sizeof_attr_list;
1376
1377 cur_p = or->get_attr.buff + sizeof_attr_list;
1378
1379 if (returned_bytes > or->get_attr.alloc_size) {
1380 OSD_DEBUG("target report: space was not big enough! "
1381 "Allocate=%u Needed=%u\n",
1382 or->get_attr.alloc_size,
1383 returned_bytes + sizeof_attr_list);
1384
1385 returned_bytes =
1386 or->get_attr.alloc_size - sizeof_attr_list;
1387 }
1388 or->get_attr.total_bytes = returned_bytes;
1389 }
1390
1391 for (n = 0; (n < *nelem) && (cur_bytes < returned_bytes); ++n) {
1392 int inc = _osd_req_alist_elem_decode(or, cur_p, oa,
1393 returned_bytes - cur_bytes);
1394
1395 if (inc < 0) {
1396 OSD_ERR("BAD FOOD from target. list not valid!"
1397 "c=%d r=%d n=%d\n",
1398 cur_bytes, returned_bytes, n);
1399 oa->val_ptr = NULL;
1400 cur_bytes = returned_bytes; /* break the caller loop */
1401 break;
1402 }
1403
1404 cur_bytes += inc;
1405 cur_p += inc;
1406 ++oa;
1407 }
1408
1409 *iterator = (returned_bytes - cur_bytes) ? cur_p : NULL;
1410 *nelem = n;
1411 return returned_bytes - cur_bytes;
1412 }
1413 EXPORT_SYMBOL(osd_req_decode_get_attr_list);
1414
1415 /*
1416 * Attributes Page-mode
1417 */
1418
1419 int osd_req_add_get_attr_page(struct osd_request *or,
1420 u32 page_id, void *attar_page, unsigned max_page_len,
1421 const struct osd_attr *set_one_attr)
1422 {
1423 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1424
1425 if (or->attributes_mode &&
1426 or->attributes_mode != OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
1427 WARN_ON(1);
1428 return -EINVAL;
1429 }
1430 or->attributes_mode = OSD_CDB_GET_ATTR_PAGE_SET_ONE;
1431
1432 or->get_attr.buff = attar_page;
1433 or->get_attr.total_bytes = max_page_len;
1434
1435 cdbh->attrs_page.get_attr_page = cpu_to_be32(page_id);
1436 cdbh->attrs_page.get_attr_alloc_length = cpu_to_be32(max_page_len);
1437
1438 if (!set_one_attr || !set_one_attr->attr_page)
1439 return 0; /* The set is optional */
1440
1441 or->set_attr.buff = set_one_attr->val_ptr;
1442 or->set_attr.total_bytes = set_one_attr->len;
1443
1444 cdbh->attrs_page.set_attr_page = cpu_to_be32(set_one_attr->attr_page);
1445 cdbh->attrs_page.set_attr_id = cpu_to_be32(set_one_attr->attr_id);
1446 cdbh->attrs_page.set_attr_length = cpu_to_be32(set_one_attr->len);
1447 return 0;
1448 }
1449 EXPORT_SYMBOL(osd_req_add_get_attr_page);
1450
1451 static int _osd_req_finalize_attr_page(struct osd_request *or)
1452 {
1453 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1454 unsigned in_padding, out_padding;
1455 int ret;
1456
1457 /* returned page */
1458 cdbh->attrs_page.get_attr_offset =
1459 osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
1460
1461 ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
1462 &or->in);
1463 if (ret)
1464 return ret;
1465
1466 if (or->set_attr.total_bytes == 0)
1467 return 0;
1468
1469 /* set one value */
1470 cdbh->attrs_page.set_attr_offset =
1471 osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
1472
1473 ret = _req_append_segment(or, out_padding, &or->set_attr, NULL,
1474 &or->out);
1475 return ret;
1476 }
1477
1478 static inline void osd_sec_parms_set_out_offset(bool is_v1,
1479 struct osd_security_parameters *sec_parms, osd_cdb_offset offset)
1480 {
1481 if (is_v1)
1482 sec_parms->v1.data_out_integrity_check_offset = offset;
1483 else
1484 sec_parms->v2.data_out_integrity_check_offset = offset;
1485 }
1486
1487 static inline void osd_sec_parms_set_in_offset(bool is_v1,
1488 struct osd_security_parameters *sec_parms, osd_cdb_offset offset)
1489 {
1490 if (is_v1)
1491 sec_parms->v1.data_in_integrity_check_offset = offset;
1492 else
1493 sec_parms->v2.data_in_integrity_check_offset = offset;
1494 }
1495
1496 static int _osd_req_finalize_data_integrity(struct osd_request *or,
1497 bool has_in, bool has_out, struct bio *out_data_bio, u64 out_data_bytes,
1498 const u8 *cap_key)
1499 {
1500 struct osd_security_parameters *sec_parms = _osd_req_sec_params(or);
1501 int ret;
1502
1503 if (!osd_is_sec_alldata(sec_parms))
1504 return 0;
1505
1506 if (has_out) {
1507 struct _osd_req_data_segment seg = {
1508 .buff = &or->out_data_integ,
1509 .total_bytes = sizeof(or->out_data_integ),
1510 };
1511 unsigned pad;
1512
1513 or->out_data_integ.data_bytes = cpu_to_be64(out_data_bytes);
1514 or->out_data_integ.set_attributes_bytes = cpu_to_be64(
1515 or->set_attr.total_bytes);
1516 or->out_data_integ.get_attributes_bytes = cpu_to_be64(
1517 or->enc_get_attr.total_bytes);
1518
1519 osd_sec_parms_set_out_offset(osd_req_is_ver1(or), sec_parms,
1520 osd_req_encode_offset(or, or->out.total_bytes, &pad));
1521
1522 ret = _req_append_segment(or, pad, &seg, or->out.last_seg,
1523 &or->out);
1524 if (ret)
1525 return ret;
1526 or->out.last_seg = NULL;
1527
1528 /* they are now all chained to request sign them all together */
1529 osd_sec_sign_data(&or->out_data_integ, out_data_bio,
1530 cap_key);
1531 }
1532
1533 if (has_in) {
1534 struct _osd_req_data_segment seg = {
1535 .buff = &or->in_data_integ,
1536 .total_bytes = sizeof(or->in_data_integ),
1537 };
1538 unsigned pad;
1539
1540 osd_sec_parms_set_in_offset(osd_req_is_ver1(or), sec_parms,
1541 osd_req_encode_offset(or, or->in.total_bytes, &pad));
1542
1543 ret = _req_append_segment(or, pad, &seg, or->in.last_seg,
1544 &or->in);
1545 if (ret)
1546 return ret;
1547
1548 or->in.last_seg = NULL;
1549 }
1550
1551 return 0;
1552 }
1553
1554 /*
1555 * osd_finalize_request and helpers
1556 */
1557 static struct request *_make_request(struct request_queue *q, bool has_write,
1558 struct _osd_io_info *oii, gfp_t flags)
1559 {
1560 if (oii->bio)
1561 return blk_make_request(q, oii->bio, flags);
1562 else {
1563 struct request *req;
1564
1565 req = blk_get_request(q, has_write ? WRITE : READ, flags);
1566 if (unlikely(!req))
1567 return ERR_PTR(-ENOMEM);
1568
1569 return req;
1570 }
1571 }
1572
1573 static int _init_blk_request(struct osd_request *or,
1574 bool has_in, bool has_out)
1575 {
1576 gfp_t flags = or->alloc_flags;
1577 struct scsi_device *scsi_device = or->osd_dev->scsi_device;
1578 struct request_queue *q = scsi_device->request_queue;
1579 struct request *req;
1580 int ret;
1581
1582 req = _make_request(q, has_out, has_out ? &or->out : &or->in, flags);
1583 if (IS_ERR(req)) {
1584 ret = PTR_ERR(req);
1585 goto out;
1586 }
1587
1588 or->request = req;
1589 req->cmd_type = REQ_TYPE_BLOCK_PC;
1590 req->cmd_flags |= REQ_QUIET;
1591
1592 req->timeout = or->timeout;
1593 req->retries = or->retries;
1594 req->sense = or->sense;
1595 req->sense_len = 0;
1596
1597 if (has_out) {
1598 or->out.req = req;
1599 if (has_in) {
1600 /* allocate bidi request */
1601 req = _make_request(q, false, &or->in, flags);
1602 if (IS_ERR(req)) {
1603 OSD_DEBUG("blk_get_request for bidi failed\n");
1604 ret = PTR_ERR(req);
1605 goto out;
1606 }
1607 req->cmd_type = REQ_TYPE_BLOCK_PC;
1608 or->in.req = or->request->next_rq = req;
1609 }
1610 } else if (has_in)
1611 or->in.req = req;
1612
1613 ret = 0;
1614 out:
1615 OSD_DEBUG("or=%p has_in=%d has_out=%d => %d, %p\n",
1616 or, has_in, has_out, ret, or->request);
1617 return ret;
1618 }
1619
1620 int osd_finalize_request(struct osd_request *or,
1621 u8 options, const void *cap, const u8 *cap_key)
1622 {
1623 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1624 bool has_in, has_out;
1625 /* Save for data_integrity without the cdb_continuation */
1626 struct bio *out_data_bio = or->out.bio;
1627 u64 out_data_bytes = or->out.total_bytes;
1628 int ret;
1629
1630 if (options & OSD_REQ_FUA)
1631 cdbh->options |= OSD_CDB_FUA;
1632
1633 if (options & OSD_REQ_DPO)
1634 cdbh->options |= OSD_CDB_DPO;
1635
1636 if (options & OSD_REQ_BYPASS_TIMESTAMPS)
1637 cdbh->timestamp_control = OSD_CDB_BYPASS_TIMESTAMPS;
1638
1639 osd_set_caps(&or->cdb, cap);
1640
1641 has_in = or->in.bio || or->get_attr.total_bytes;
1642 has_out = or->out.bio || or->cdb_cont.total_bytes ||
1643 or->set_attr.total_bytes || or->enc_get_attr.total_bytes;
1644
1645 ret = _osd_req_finalize_cdb_cont(or, cap_key);
1646 if (ret) {
1647 OSD_DEBUG("_osd_req_finalize_cdb_cont failed\n");
1648 return ret;
1649 }
1650 ret = _init_blk_request(or, has_in, has_out);
1651 if (ret) {
1652 OSD_DEBUG("_init_blk_request failed\n");
1653 return ret;
1654 }
1655
1656 or->out.pad_buff = sg_out_pad_buffer;
1657 or->in.pad_buff = sg_in_pad_buffer;
1658
1659 if (!or->attributes_mode)
1660 or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
1661 cdbh->command_specific_options |= or->attributes_mode;
1662 if (or->attributes_mode == OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
1663 ret = _osd_req_finalize_attr_page(or);
1664 if (ret) {
1665 OSD_DEBUG("_osd_req_finalize_attr_page failed\n");
1666 return ret;
1667 }
1668 } else {
1669 /* TODO: I think that for the GET_ATTR command these 2 should
1670 * be reversed to keep them in execution order (for embeded
1671 * targets with low memory footprint)
1672 */
1673 ret = _osd_req_finalize_set_attr_list(or);
1674 if (ret) {
1675 OSD_DEBUG("_osd_req_finalize_set_attr_list failed\n");
1676 return ret;
1677 }
1678
1679 ret = _osd_req_finalize_get_attr_list(or);
1680 if (ret) {
1681 OSD_DEBUG("_osd_req_finalize_get_attr_list failed\n");
1682 return ret;
1683 }
1684 }
1685
1686 ret = _osd_req_finalize_data_integrity(or, has_in, has_out,
1687 out_data_bio, out_data_bytes,
1688 cap_key);
1689 if (ret)
1690 return ret;
1691
1692 osd_sec_sign_cdb(&or->cdb, cap_key);
1693
1694 or->request->cmd = or->cdb.buff;
1695 or->request->cmd_len = _osd_req_cdb_len(or);
1696
1697 return 0;
1698 }
1699 EXPORT_SYMBOL(osd_finalize_request);
1700
1701 static bool _is_osd_security_code(int code)
1702 {
1703 return (code == osd_security_audit_value_frozen) ||
1704 (code == osd_security_working_key_frozen) ||
1705 (code == osd_nonce_not_unique) ||
1706 (code == osd_nonce_timestamp_out_of_range) ||
1707 (code == osd_invalid_dataout_buffer_integrity_check_value);
1708 }
1709
1710 #define OSD_SENSE_PRINT1(fmt, a...) \
1711 do { \
1712 if (__cur_sense_need_output) \
1713 OSD_ERR(fmt, ##a); \
1714 } while (0)
1715
1716 #define OSD_SENSE_PRINT2(fmt, a...) OSD_SENSE_PRINT1(" " fmt, ##a)
1717
1718 int osd_req_decode_sense_full(struct osd_request *or,
1719 struct osd_sense_info *osi, bool silent,
1720 struct osd_obj_id *bad_obj_list __unused, int max_obj __unused,
1721 struct osd_attr *bad_attr_list, int max_attr)
1722 {
1723 int sense_len, original_sense_len;
1724 struct osd_sense_info local_osi;
1725 struct scsi_sense_descriptor_based *ssdb;
1726 void *cur_descriptor;
1727 #if (CONFIG_SCSI_OSD_DPRINT_SENSE == 0)
1728 const bool __cur_sense_need_output = false;
1729 #else
1730 bool __cur_sense_need_output = !silent;
1731 #endif
1732 int ret;
1733
1734 if (likely(!or->req_errors))
1735 return 0;
1736
1737 osi = osi ? : &local_osi;
1738 memset(osi, 0, sizeof(*osi));
1739
1740 ssdb = (typeof(ssdb))or->sense;
1741 sense_len = or->sense_len;
1742 if ((sense_len < (int)sizeof(*ssdb) || !ssdb->sense_key)) {
1743 OSD_ERR("Block-layer returned error(0x%x) but "
1744 "sense_len(%u) || key(%d) is empty\n",
1745 or->req_errors, sense_len, ssdb->sense_key);
1746 goto analyze;
1747 }
1748
1749 if ((ssdb->response_code != 0x72) && (ssdb->response_code != 0x73)) {
1750 OSD_ERR("Unrecognized scsi sense: rcode=%x length=%d\n",
1751 ssdb->response_code, sense_len);
1752 goto analyze;
1753 }
1754
1755 osi->key = ssdb->sense_key;
1756 osi->additional_code = be16_to_cpu(ssdb->additional_sense_code);
1757 original_sense_len = ssdb->additional_sense_length + 8;
1758
1759 #if (CONFIG_SCSI_OSD_DPRINT_SENSE == 1)
1760 if (__cur_sense_need_output)
1761 __cur_sense_need_output = (osi->key > scsi_sk_recovered_error);
1762 #endif
1763 OSD_SENSE_PRINT1("Main Sense information key=0x%x length(%d, %d) "
1764 "additional_code=0x%x async_error=%d errors=0x%x\n",
1765 osi->key, original_sense_len, sense_len,
1766 osi->additional_code, or->async_error,
1767 or->req_errors);
1768
1769 if (original_sense_len < sense_len)
1770 sense_len = original_sense_len;
1771
1772 cur_descriptor = ssdb->ssd;
1773 sense_len -= sizeof(*ssdb);
1774 while (sense_len > 0) {
1775 struct scsi_sense_descriptor *ssd = cur_descriptor;
1776 int cur_len = ssd->additional_length + 2;
1777
1778 sense_len -= cur_len;
1779
1780 if (sense_len < 0)
1781 break; /* sense was truncated */
1782
1783 switch (ssd->descriptor_type) {
1784 case scsi_sense_information:
1785 case scsi_sense_command_specific_information:
1786 {
1787 struct scsi_sense_command_specific_data_descriptor
1788 *sscd = cur_descriptor;
1789
1790 osi->command_info =
1791 get_unaligned_be64(&sscd->information) ;
1792 OSD_SENSE_PRINT2(
1793 "command_specific_information 0x%llx \n",
1794 _LLU(osi->command_info));
1795 break;
1796 }
1797 case scsi_sense_key_specific:
1798 {
1799 struct scsi_sense_key_specific_data_descriptor
1800 *ssks = cur_descriptor;
1801
1802 osi->sense_info = get_unaligned_be16(&ssks->value);
1803 OSD_SENSE_PRINT2(
1804 "sense_key_specific_information %u"
1805 "sksv_cd_bpv_bp (0x%x)\n",
1806 osi->sense_info, ssks->sksv_cd_bpv_bp);
1807 break;
1808 }
1809 case osd_sense_object_identification:
1810 { /*FIXME: Keep first not last, Store in array*/
1811 struct osd_sense_identification_data_descriptor
1812 *osidd = cur_descriptor;
1813
1814 osi->not_initiated_command_functions =
1815 le32_to_cpu(osidd->not_initiated_functions);
1816 osi->completed_command_functions =
1817 le32_to_cpu(osidd->completed_functions);
1818 osi->obj.partition = be64_to_cpu(osidd->partition_id);
1819 osi->obj.id = be64_to_cpu(osidd->object_id);
1820 OSD_SENSE_PRINT2(
1821 "object_identification pid=0x%llx oid=0x%llx\n",
1822 _LLU(osi->obj.partition), _LLU(osi->obj.id));
1823 OSD_SENSE_PRINT2(
1824 "not_initiated_bits(%x) "
1825 "completed_command_bits(%x)\n",
1826 osi->not_initiated_command_functions,
1827 osi->completed_command_functions);
1828 break;
1829 }
1830 case osd_sense_response_integrity_check:
1831 {
1832 struct osd_sense_response_integrity_check_descriptor
1833 *osricd = cur_descriptor;
1834 const unsigned len =
1835 sizeof(osricd->integrity_check_value);
1836 char key_dump[len*4 + 2]; /* 2nibbles+space+ASCII */
1837
1838 hex_dump_to_buffer(osricd->integrity_check_value, len,
1839 32, 1, key_dump, sizeof(key_dump), true);
1840 OSD_SENSE_PRINT2("response_integrity [%s]\n", key_dump);
1841 }
1842 case osd_sense_attribute_identification:
1843 {
1844 struct osd_sense_attributes_data_descriptor
1845 *osadd = cur_descriptor;
1846 unsigned len = min(cur_len, sense_len);
1847 struct osd_sense_attr *pattr = osadd->sense_attrs;
1848
1849 while (len >= sizeof(*pattr)) {
1850 u32 attr_page = be32_to_cpu(pattr->attr_page);
1851 u32 attr_id = be32_to_cpu(pattr->attr_id);
1852
1853 if (!osi->attr.attr_page) {
1854 osi->attr.attr_page = attr_page;
1855 osi->attr.attr_id = attr_id;
1856 }
1857
1858 if (bad_attr_list && max_attr) {
1859 bad_attr_list->attr_page = attr_page;
1860 bad_attr_list->attr_id = attr_id;
1861 bad_attr_list++;
1862 max_attr--;
1863 }
1864
1865 len -= sizeof(*pattr);
1866 OSD_SENSE_PRINT2(
1867 "osd_sense_attribute_identification"
1868 "attr_page=0x%x attr_id=0x%x\n",
1869 attr_page, attr_id);
1870 }
1871 }
1872 /*These are not legal for OSD*/
1873 case scsi_sense_field_replaceable_unit:
1874 OSD_SENSE_PRINT2("scsi_sense_field_replaceable_unit\n");
1875 break;
1876 case scsi_sense_stream_commands:
1877 OSD_SENSE_PRINT2("scsi_sense_stream_commands\n");
1878 break;
1879 case scsi_sense_block_commands:
1880 OSD_SENSE_PRINT2("scsi_sense_block_commands\n");
1881 break;
1882 case scsi_sense_ata_return:
1883 OSD_SENSE_PRINT2("scsi_sense_ata_return\n");
1884 break;
1885 default:
1886 if (ssd->descriptor_type <= scsi_sense_Reserved_last)
1887 OSD_SENSE_PRINT2(
1888 "scsi_sense Reserved descriptor (0x%x)",
1889 ssd->descriptor_type);
1890 else
1891 OSD_SENSE_PRINT2(
1892 "scsi_sense Vendor descriptor (0x%x)",
1893 ssd->descriptor_type);
1894 }
1895
1896 cur_descriptor += cur_len;
1897 }
1898
1899 analyze:
1900 if (!osi->key) {
1901 /* scsi sense is Empty, the request was never issued to target
1902 * linux return code might tell us what happened.
1903 */
1904 if (or->async_error == -ENOMEM)
1905 osi->osd_err_pri = OSD_ERR_PRI_RESOURCE;
1906 else
1907 osi->osd_err_pri = OSD_ERR_PRI_UNREACHABLE;
1908 ret = or->async_error;
1909 } else if (osi->key <= scsi_sk_recovered_error) {
1910 osi->osd_err_pri = 0;
1911 ret = 0;
1912 } else if (osi->additional_code == scsi_invalid_field_in_cdb) {
1913 if (osi->cdb_field_offset == OSD_CFO_STARTING_BYTE) {
1914 osi->osd_err_pri = OSD_ERR_PRI_CLEAR_PAGES;
1915 ret = -EFAULT; /* caller should recover from this */
1916 } else if (osi->cdb_field_offset == OSD_CFO_OBJECT_ID) {
1917 osi->osd_err_pri = OSD_ERR_PRI_NOT_FOUND;
1918 ret = -ENOENT;
1919 } else if (osi->cdb_field_offset == OSD_CFO_PERMISSIONS) {
1920 osi->osd_err_pri = OSD_ERR_PRI_NO_ACCESS;
1921 ret = -EACCES;
1922 } else {
1923 osi->osd_err_pri = OSD_ERR_PRI_BAD_CRED;
1924 ret = -EINVAL;
1925 }
1926 } else if (osi->additional_code == osd_quota_error) {
1927 osi->osd_err_pri = OSD_ERR_PRI_NO_SPACE;
1928 ret = -ENOSPC;
1929 } else if (_is_osd_security_code(osi->additional_code)) {
1930 osi->osd_err_pri = OSD_ERR_PRI_BAD_CRED;
1931 ret = -EINVAL;
1932 } else {
1933 osi->osd_err_pri = OSD_ERR_PRI_EIO;
1934 ret = -EIO;
1935 }
1936
1937 if (!or->out.residual)
1938 or->out.residual = or->out.total_bytes;
1939 if (!or->in.residual)
1940 or->in.residual = or->in.total_bytes;
1941
1942 return ret;
1943 }
1944 EXPORT_SYMBOL(osd_req_decode_sense_full);
1945
1946 /*
1947 * Implementation of osd_sec.h API
1948 * TODO: Move to a separate osd_sec.c file at a later stage.
1949 */
1950
1951 enum { OSD_SEC_CAP_V1_ALL_CAPS =
1952 OSD_SEC_CAP_APPEND | OSD_SEC_CAP_OBJ_MGMT | OSD_SEC_CAP_REMOVE |
1953 OSD_SEC_CAP_CREATE | OSD_SEC_CAP_SET_ATTR | OSD_SEC_CAP_GET_ATTR |
1954 OSD_SEC_CAP_WRITE | OSD_SEC_CAP_READ | OSD_SEC_CAP_POL_SEC |
1955 OSD_SEC_CAP_GLOBAL | OSD_SEC_CAP_DEV_MGMT
1956 };
1957
1958 enum { OSD_SEC_CAP_V2_ALL_CAPS =
1959 OSD_SEC_CAP_V1_ALL_CAPS | OSD_SEC_CAP_QUERY | OSD_SEC_CAP_M_OBJECT
1960 };
1961
1962 void osd_sec_init_nosec_doall_caps(void *caps,
1963 const struct osd_obj_id *obj, bool is_collection, const bool is_v1)
1964 {
1965 struct osd_capability *cap = caps;
1966 u8 type;
1967 u8 descriptor_type;
1968
1969 if (likely(obj->id)) {
1970 if (unlikely(is_collection)) {
1971 type = OSD_SEC_OBJ_COLLECTION;
1972 descriptor_type = is_v1 ? OSD_SEC_OBJ_DESC_OBJ :
1973 OSD_SEC_OBJ_DESC_COL;
1974 } else {
1975 type = OSD_SEC_OBJ_USER;
1976 descriptor_type = OSD_SEC_OBJ_DESC_OBJ;
1977 }
1978 WARN_ON(!obj->partition);
1979 } else {
1980 type = obj->partition ? OSD_SEC_OBJ_PARTITION :
1981 OSD_SEC_OBJ_ROOT;
1982 descriptor_type = OSD_SEC_OBJ_DESC_PAR;
1983 }
1984
1985 memset(cap, 0, sizeof(*cap));
1986
1987 cap->h.format = OSD_SEC_CAP_FORMAT_VER1;
1988 cap->h.integrity_algorithm__key_version = 0; /* MAKE_BYTE(0, 0); */
1989 cap->h.security_method = OSD_SEC_NOSEC;
1990 /* cap->expiration_time;
1991 cap->AUDIT[30-10];
1992 cap->discriminator[42-30];
1993 cap->object_created_time; */
1994 cap->h.object_type = type;
1995 osd_sec_set_caps(&cap->h, OSD_SEC_CAP_V1_ALL_CAPS);
1996 cap->h.object_descriptor_type = descriptor_type;
1997 cap->od.obj_desc.policy_access_tag = 0;
1998 cap->od.obj_desc.allowed_partition_id = cpu_to_be64(obj->partition);
1999 cap->od.obj_desc.allowed_object_id = cpu_to_be64(obj->id);
2000 }
2001 EXPORT_SYMBOL(osd_sec_init_nosec_doall_caps);
2002
2003 /* FIXME: Extract version from caps pointer.
2004 * Also Pete's target only supports caps from OSDv1 for now
2005 */
2006 void osd_set_caps(struct osd_cdb *cdb, const void *caps)
2007 {
2008 bool is_ver1 = true;
2009 /* NOTE: They start at same address */
2010 memcpy(&cdb->v1.caps, caps, is_ver1 ? OSDv1_CAP_LEN : OSD_CAP_LEN);
2011 }
2012
2013 bool osd_is_sec_alldata(struct osd_security_parameters *sec_parms __unused)
2014 {
2015 return false;
2016 }
2017
2018 void osd_sec_sign_cdb(struct osd_cdb *ocdb __unused, const u8 *cap_key __unused)
2019 {
2020 }
2021
2022 void osd_sec_sign_data(void *data_integ __unused,
2023 struct bio *bio __unused, const u8 *cap_key __unused)
2024 {
2025 }
2026
2027 /*
2028 * Declared in osd_protocol.h
2029 * 4.12.5 Data-In and Data-Out buffer offsets
2030 * byte offset = mantissa * (2^(exponent+8))
2031 * Returns the smallest allowed encoded offset that contains given @offset
2032 * The actual encoded offset returned is @offset + *@padding.
2033 */
2034 osd_cdb_offset __osd_encode_offset(
2035 u64 offset, unsigned *padding, int min_shift, int max_shift)
2036 {
2037 u64 try_offset = -1, mod, align;
2038 osd_cdb_offset be32_offset;
2039 int shift;
2040
2041 *padding = 0;
2042 if (!offset)
2043 return 0;
2044
2045 for (shift = min_shift; shift < max_shift; ++shift) {
2046 try_offset = offset >> shift;
2047 if (try_offset < (1 << OSD_OFFSET_MAX_BITS))
2048 break;
2049 }
2050
2051 BUG_ON(shift == max_shift);
2052
2053 align = 1 << shift;
2054 mod = offset & (align - 1);
2055 if (mod) {
2056 *padding = align - mod;
2057 try_offset += 1;
2058 }
2059
2060 try_offset |= ((shift - 8) & 0xf) << 28;
2061 be32_offset = cpu_to_be32((u32)try_offset);
2062
2063 OSD_DEBUG("offset=%llu mantissa=%llu exp=%d encoded=%x pad=%d\n",
2064 _LLU(offset), _LLU(try_offset & 0x0FFFFFFF), shift,
2065 be32_offset, *padding);
2066 return be32_offset;
2067 }
Linux kernel - Deliverables
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