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x86/mm/pat: Don't report PAT on CPUs that don't support it
[linux/fpc-iii.git] / drivers / scsi / osd / osd_initiator.c
blob6903f03c88af46bb54f7d3bb1e07b3a16596714d
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 <ooo@electrozaur.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 #include <scsi/scsi_request.h>
52
53 #include "osd_debug.h"
54
55 #ifndef __unused
56 # define __unused __attribute__((unused))
57 #endif
58
59 enum { OSD_REQ_RETRIES = 1 };
60
61 MODULE_AUTHOR("Boaz Harrosh <ooo@electrozaur.com>");
62 MODULE_DESCRIPTION("open-osd initiator library libosd.ko");
63 MODULE_LICENSE("GPL");
64
65 static inline void build_test(void)
66 {
67 /* structures were not packed */
68 BUILD_BUG_ON(sizeof(struct osd_capability) != OSD_CAP_LEN);
69 BUILD_BUG_ON(sizeof(struct osdv2_cdb) != OSD_TOTAL_CDB_LEN);
70 BUILD_BUG_ON(sizeof(struct osdv1_cdb) != OSDv1_TOTAL_CDB_LEN);
71 }
72
73 static const char *_osd_ver_desc(struct osd_request *or)
74 {
75 return osd_req_is_ver1(or) ? "OSD1" : "OSD2";
76 }
77
78 #define ATTR_DEF_RI(id, len) ATTR_DEF(OSD_APAGE_ROOT_INFORMATION, id, len)
79
80 static int _osd_get_print_system_info(struct osd_dev *od,
81 void *caps, struct osd_dev_info *odi)
82 {
83 struct osd_request *or;
84 struct osd_attr get_attrs[] = {
85 ATTR_DEF_RI(OSD_ATTR_RI_VENDOR_IDENTIFICATION, 8),
86 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_IDENTIFICATION, 16),
87 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_MODEL, 32),
88 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_REVISION_LEVEL, 4),
89 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_SERIAL_NUMBER, 64 /*variable*/),
90 ATTR_DEF_RI(OSD_ATTR_RI_OSD_NAME, 64 /*variable*/),
91 ATTR_DEF_RI(OSD_ATTR_RI_TOTAL_CAPACITY, 8),
92 ATTR_DEF_RI(OSD_ATTR_RI_USED_CAPACITY, 8),
93 ATTR_DEF_RI(OSD_ATTR_RI_NUMBER_OF_PARTITIONS, 8),
94 ATTR_DEF_RI(OSD_ATTR_RI_CLOCK, 6),
95 /* IBM-OSD-SIM Has a bug with this one put it last */
96 ATTR_DEF_RI(OSD_ATTR_RI_OSD_SYSTEM_ID, 20),
97 };
98 void *iter = NULL, *pFirst;
99 int nelem = ARRAY_SIZE(get_attrs), a = 0;
100 int ret;
101
102 or = osd_start_request(od, GFP_KERNEL);
103 if (!or)
104 return -ENOMEM;
105
106 /* get attrs */
107 osd_req_get_attributes(or, &osd_root_object);
108 osd_req_add_get_attr_list(or, get_attrs, ARRAY_SIZE(get_attrs));
109
110 ret = osd_finalize_request(or, 0, caps, NULL);
111 if (ret)
112 goto out;
113
114 ret = osd_execute_request(or);
115 if (ret) {
116 OSD_ERR("Failed to detect %s => %d\n", _osd_ver_desc(or), ret);
117 goto out;
118 }
119
120 osd_req_decode_get_attr_list(or, get_attrs, &nelem, &iter);
121
122 OSD_INFO("Detected %s device\n",
123 _osd_ver_desc(or));
124
125 pFirst = get_attrs[a++].val_ptr;
126 OSD_INFO("VENDOR_IDENTIFICATION [%s]\n",
127 (char *)pFirst);
128
129 pFirst = get_attrs[a++].val_ptr;
130 OSD_INFO("PRODUCT_IDENTIFICATION [%s]\n",
131 (char *)pFirst);
132
133 pFirst = get_attrs[a++].val_ptr;
134 OSD_INFO("PRODUCT_MODEL [%s]\n",
135 (char *)pFirst);
136
137 pFirst = get_attrs[a++].val_ptr;
138 OSD_INFO("PRODUCT_REVISION_LEVEL [%u]\n",
139 pFirst ? get_unaligned_be32(pFirst) : ~0U);
140
141 pFirst = get_attrs[a++].val_ptr;
142 OSD_INFO("PRODUCT_SERIAL_NUMBER [%s]\n",
143 (char *)pFirst);
144
145 odi->osdname_len = get_attrs[a].len;
146 /* Avoid NULL for memcmp optimization 0-length is good enough */
147 odi->osdname = kzalloc(odi->osdname_len + 1, GFP_KERNEL);
148 if (!odi->osdname) {
149 ret = -ENOMEM;
150 goto out;
151 }
152 if (odi->osdname_len)
153 memcpy(odi->osdname, get_attrs[a].val_ptr, odi->osdname_len);
154 OSD_INFO("OSD_NAME [%s]\n", odi->osdname);
155 a++;
156
157 pFirst = get_attrs[a++].val_ptr;
158 OSD_INFO("TOTAL_CAPACITY [0x%llx]\n",
159 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
160
161 pFirst = get_attrs[a++].val_ptr;
162 OSD_INFO("USED_CAPACITY [0x%llx]\n",
163 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
164
165 pFirst = get_attrs[a++].val_ptr;
166 OSD_INFO("NUMBER_OF_PARTITIONS [%llu]\n",
167 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
168
169 if (a >= nelem)
170 goto out;
171
172 /* FIXME: Where are the time utilities */
173 pFirst = get_attrs[a++].val_ptr;
174 OSD_INFO("CLOCK [0x%6phN]\n", pFirst);
175
176 if (a < nelem) { /* IBM-OSD-SIM bug, Might not have it */
177 unsigned len = get_attrs[a].len;
178 char sid_dump[32*4 + 2]; /* 2nibbles+space+ASCII */
179
180 hex_dump_to_buffer(get_attrs[a].val_ptr, len, 32, 1,
181 sid_dump, sizeof(sid_dump), true);
182 OSD_INFO("OSD_SYSTEM_ID(%d)\n"
183 " [%s]\n", len, sid_dump);
184
185 if (unlikely(len > sizeof(odi->systemid))) {
186 OSD_ERR("OSD Target error: OSD_SYSTEM_ID too long(%d). "
187 "device identification might not work\n", len);
188 len = sizeof(odi->systemid);
189 }
190 odi->systemid_len = len;
191 memcpy(odi->systemid, get_attrs[a].val_ptr, len);
192 a++;
193 }
194 out:
195 osd_end_request(or);
196 return ret;
197 }
198
199 int osd_auto_detect_ver(struct osd_dev *od,
200 void *caps, struct osd_dev_info *odi)
201 {
202 int ret;
203
204 /* Auto-detect the osd version */
205 ret = _osd_get_print_system_info(od, caps, odi);
206 if (ret) {
207 osd_dev_set_ver(od, OSD_VER1);
208 OSD_DEBUG("converting to OSD1\n");
209 ret = _osd_get_print_system_info(od, caps, odi);
210 }
211
212 return ret;
213 }
214 EXPORT_SYMBOL(osd_auto_detect_ver);
215
216 static unsigned _osd_req_cdb_len(struct osd_request *or)
217 {
218 return osd_req_is_ver1(or) ? OSDv1_TOTAL_CDB_LEN : OSD_TOTAL_CDB_LEN;
219 }
220
221 static unsigned _osd_req_alist_elem_size(struct osd_request *or, unsigned len)
222 {
223 return osd_req_is_ver1(or) ?
224 osdv1_attr_list_elem_size(len) :
225 osdv2_attr_list_elem_size(len);
226 }
227
228 static void _osd_req_alist_elem_encode(struct osd_request *or,
229 void *attr_last, const struct osd_attr *oa)
230 {
231 if (osd_req_is_ver1(or)) {
232 struct osdv1_attributes_list_element *attr = attr_last;
233
234 attr->attr_page = cpu_to_be32(oa->attr_page);
235 attr->attr_id = cpu_to_be32(oa->attr_id);
236 attr->attr_bytes = cpu_to_be16(oa->len);
237 memcpy(attr->attr_val, oa->val_ptr, oa->len);
238 } else {
239 struct osdv2_attributes_list_element *attr = attr_last;
240
241 attr->attr_page = cpu_to_be32(oa->attr_page);
242 attr->attr_id = cpu_to_be32(oa->attr_id);
243 attr->attr_bytes = cpu_to_be16(oa->len);
244 memcpy(attr->attr_val, oa->val_ptr, oa->len);
245 }
246 }
247
248 static int _osd_req_alist_elem_decode(struct osd_request *or,
249 void *cur_p, struct osd_attr *oa, unsigned max_bytes)
250 {
251 unsigned inc;
252 if (osd_req_is_ver1(or)) {
253 struct osdv1_attributes_list_element *attr = cur_p;
254
255 if (max_bytes < sizeof(*attr))
256 return -1;
257
258 oa->len = be16_to_cpu(attr->attr_bytes);
259 inc = _osd_req_alist_elem_size(or, oa->len);
260 if (inc > max_bytes)
261 return -1;
262
263 oa->attr_page = be32_to_cpu(attr->attr_page);
264 oa->attr_id = be32_to_cpu(attr->attr_id);
265
266 /* OSD1: On empty attributes we return a pointer to 2 bytes
267 * of zeros. This keeps similar behaviour with OSD2.
268 * (See below)
269 */
270 oa->val_ptr = likely(oa->len) ? attr->attr_val :
271 (u8 *)&attr->attr_bytes;
272 } else {
273 struct osdv2_attributes_list_element *attr = cur_p;
274
275 if (max_bytes < sizeof(*attr))
276 return -1;
277
278 oa->len = be16_to_cpu(attr->attr_bytes);
279 inc = _osd_req_alist_elem_size(or, oa->len);
280 if (inc > max_bytes)
281 return -1;
282
283 oa->attr_page = be32_to_cpu(attr->attr_page);
284 oa->attr_id = be32_to_cpu(attr->attr_id);
285
286 /* OSD2: For convenience, on empty attributes, we return 8 bytes
287 * of zeros here. This keeps the same behaviour with OSD2r04,
288 * and is nice with null terminating ASCII fields.
289 * oa->val_ptr == NULL marks the end-of-list, or error.
290 */
291 oa->val_ptr = likely(oa->len) ? attr->attr_val : attr->reserved;
292 }
293 return inc;
294 }
295
296 static unsigned _osd_req_alist_size(struct osd_request *or, void *list_head)
297 {
298 return osd_req_is_ver1(or) ?
299 osdv1_list_size(list_head) :
300 osdv2_list_size(list_head);
301 }
302
303 static unsigned _osd_req_sizeof_alist_header(struct osd_request *or)
304 {
305 return osd_req_is_ver1(or) ?
306 sizeof(struct osdv1_attributes_list_header) :
307 sizeof(struct osdv2_attributes_list_header);
308 }
309
310 static void _osd_req_set_alist_type(struct osd_request *or,
311 void *list, int list_type)
312 {
313 if (osd_req_is_ver1(or)) {
314 struct osdv1_attributes_list_header *attr_list = list;
315
316 memset(attr_list, 0, sizeof(*attr_list));
317 attr_list->type = list_type;
318 } else {
319 struct osdv2_attributes_list_header *attr_list = list;
320
321 memset(attr_list, 0, sizeof(*attr_list));
322 attr_list->type = list_type;
323 }
324 }
325
326 static bool _osd_req_is_alist_type(struct osd_request *or,
327 void *list, int list_type)
328 {
329 if (!list)
330 return false;
331
332 if (osd_req_is_ver1(or)) {
333 struct osdv1_attributes_list_header *attr_list = list;
334
335 return attr_list->type == list_type;
336 } else {
337 struct osdv2_attributes_list_header *attr_list = list;
338
339 return attr_list->type == list_type;
340 }
341 }
342
343 /* This is for List-objects not Attributes-Lists */
344 static void _osd_req_encode_olist(struct osd_request *or,
345 struct osd_obj_id_list *list)
346 {
347 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
348
349 if (osd_req_is_ver1(or)) {
350 cdbh->v1.list_identifier = list->list_identifier;
351 cdbh->v1.start_address = list->continuation_id;
352 } else {
353 cdbh->v2.list_identifier = list->list_identifier;
354 cdbh->v2.start_address = list->continuation_id;
355 }
356 }
357
358 static osd_cdb_offset osd_req_encode_offset(struct osd_request *or,
359 u64 offset, unsigned *padding)
360 {
361 return __osd_encode_offset(offset, padding,
362 osd_req_is_ver1(or) ?
363 OSDv1_OFFSET_MIN_SHIFT : OSD_OFFSET_MIN_SHIFT,
364 OSD_OFFSET_MAX_SHIFT);
365 }
366
367 static struct osd_security_parameters *
368 _osd_req_sec_params(struct osd_request *or)
369 {
370 struct osd_cdb *ocdb = &or->cdb;
371
372 if (osd_req_is_ver1(or))
373 return (struct osd_security_parameters *)&ocdb->v1.sec_params;
374 else
375 return (struct osd_security_parameters *)&ocdb->v2.sec_params;
376 }
377
378 void osd_dev_init(struct osd_dev *osdd, struct scsi_device *scsi_device)
379 {
380 memset(osdd, 0, sizeof(*osdd));
381 osdd->scsi_device = scsi_device;
382 osdd->def_timeout = BLK_DEFAULT_SG_TIMEOUT;
383 #ifdef OSD_VER1_SUPPORT
384 osdd->version = OSD_VER2;
385 #endif
386 /* TODO: Allocate pools for osd_request attributes ... */
387 }
388 EXPORT_SYMBOL(osd_dev_init);
389
390 void osd_dev_fini(struct osd_dev *osdd)
391 {
392 /* TODO: De-allocate pools */
393
394 osdd->scsi_device = NULL;
395 }
396 EXPORT_SYMBOL(osd_dev_fini);
397
398 static struct osd_request *_osd_request_alloc(gfp_t gfp)
399 {
400 struct osd_request *or;
401
402 /* TODO: Use mempool with one saved request */
403 or = kzalloc(sizeof(*or), gfp);
404 return or;
405 }
406
407 static void _osd_request_free(struct osd_request *or)
408 {
409 kfree(or);
410 }
411
412 struct osd_request *osd_start_request(struct osd_dev *dev, gfp_t gfp)
413 {
414 struct osd_request *or;
415
416 or = _osd_request_alloc(gfp);
417 if (!or)
418 return NULL;
419
420 or->osd_dev = dev;
421 or->alloc_flags = gfp;
422 or->timeout = dev->def_timeout;
423 or->retries = OSD_REQ_RETRIES;
424
425 return or;
426 }
427 EXPORT_SYMBOL(osd_start_request);
428
429 static void _osd_free_seg(struct osd_request *or __unused,
430 struct _osd_req_data_segment *seg)
431 {
432 if (!seg->buff || !seg->alloc_size)
433 return;
434
435 kfree(seg->buff);
436 seg->buff = NULL;
437 seg->alloc_size = 0;
438 }
439
440 static void _put_request(struct request *rq)
441 {
442 /*
443 * If osd_finalize_request() was called but the request was not
444 * executed through the block layer, then we must release BIOs.
445 * TODO: Keep error code in or->async_error. Need to audit all
446 * code paths.
447 */
448 if (unlikely(rq->bio))
449 blk_end_request(rq, -ENOMEM, blk_rq_bytes(rq));
450 else
451 blk_put_request(rq);
452 }
453
454 void osd_end_request(struct osd_request *or)
455 {
456 struct request *rq = or->request;
457
458 if (rq) {
459 if (rq->next_rq) {
460 _put_request(rq->next_rq);
461 rq->next_rq = NULL;
462 }
463
464 _put_request(rq);
465 }
466
467 _osd_free_seg(or, &or->get_attr);
468 _osd_free_seg(or, &or->enc_get_attr);
469 _osd_free_seg(or, &or->set_attr);
470 _osd_free_seg(or, &or->cdb_cont);
471
472 _osd_request_free(or);
473 }
474 EXPORT_SYMBOL(osd_end_request);
475
476 static void _set_error_resid(struct osd_request *or, struct request *req,
477 int error)
478 {
479 or->async_error = error;
480 or->req_errors = req->errors ? : error;
481 or->sense_len = scsi_req(req)->sense_len;
482 if (or->sense_len)
483 memcpy(or->sense, scsi_req(req)->sense, or->sense_len);
484 if (or->out.req)
485 or->out.residual = scsi_req(or->out.req)->resid_len;
486 if (or->in.req)
487 or->in.residual = scsi_req(or->in.req)->resid_len;
488 }
489
490 int osd_execute_request(struct osd_request *or)
491 {
492 int error = blk_execute_rq(or->request->q, NULL, or->request, 0);
493
494 _set_error_resid(or, or->request, error);
495 return error;
496 }
497 EXPORT_SYMBOL(osd_execute_request);
498
499 static void osd_request_async_done(struct request *req, int error)
500 {
501 struct osd_request *or = req->end_io_data;
502
503 _set_error_resid(or, req, error);
504 if (req->next_rq) {
505 __blk_put_request(req->q, req->next_rq);
506 req->next_rq = NULL;
507 }
508
509 __blk_put_request(req->q, req);
510 or->request = NULL;
511 or->in.req = NULL;
512 or->out.req = NULL;
513
514 if (or->async_done)
515 or->async_done(or, or->async_private);
516 else
517 osd_end_request(or);
518 }
519
520 int osd_execute_request_async(struct osd_request *or,
521 osd_req_done_fn *done, void *private)
522 {
523 or->request->end_io_data = or;
524 or->async_private = private;
525 or->async_done = done;
526
527 blk_execute_rq_nowait(or->request->q, NULL, or->request, 0,
528 osd_request_async_done);
529 return 0;
530 }
531 EXPORT_SYMBOL(osd_execute_request_async);
532
533 u8 sg_out_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
534 u8 sg_in_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
535
536 static int _osd_realloc_seg(struct osd_request *or,
537 struct _osd_req_data_segment *seg, unsigned max_bytes)
538 {
539 void *buff;
540
541 if (seg->alloc_size >= max_bytes)
542 return 0;
543
544 buff = krealloc(seg->buff, max_bytes, or->alloc_flags);
545 if (!buff) {
546 OSD_ERR("Failed to Realloc %d-bytes was-%d\n", max_bytes,
547 seg->alloc_size);
548 return -ENOMEM;
549 }
550
551 memset(buff + seg->alloc_size, 0, max_bytes - seg->alloc_size);
552 seg->buff = buff;
553 seg->alloc_size = max_bytes;
554 return 0;
555 }
556
557 static int _alloc_cdb_cont(struct osd_request *or, unsigned total_bytes)
558 {
559 OSD_DEBUG("total_bytes=%d\n", total_bytes);
560 return _osd_realloc_seg(or, &or->cdb_cont, total_bytes);
561 }
562
563 static int _alloc_set_attr_list(struct osd_request *or,
564 const struct osd_attr *oa, unsigned nelem, unsigned add_bytes)
565 {
566 unsigned total_bytes = add_bytes;
567
568 for (; nelem; --nelem, ++oa)
569 total_bytes += _osd_req_alist_elem_size(or, oa->len);
570
571 OSD_DEBUG("total_bytes=%d\n", total_bytes);
572 return _osd_realloc_seg(or, &or->set_attr, total_bytes);
573 }
574
575 static int _alloc_get_attr_desc(struct osd_request *or, unsigned max_bytes)
576 {
577 OSD_DEBUG("total_bytes=%d\n", max_bytes);
578 return _osd_realloc_seg(or, &or->enc_get_attr, max_bytes);
579 }
580
581 static int _alloc_get_attr_list(struct osd_request *or)
582 {
583 OSD_DEBUG("total_bytes=%d\n", or->get_attr.total_bytes);
584 return _osd_realloc_seg(or, &or->get_attr, or->get_attr.total_bytes);
585 }
586
587 /*
588 * Common to all OSD commands
589 */
590
591 static void _osdv1_req_encode_common(struct osd_request *or,
592 __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
593 {
594 struct osdv1_cdb *ocdb = &or->cdb.v1;
595
596 /*
597 * For speed, the commands
598 * OSD_ACT_PERFORM_SCSI_COMMAND , V1 0x8F7E, V2 0x8F7C
599 * OSD_ACT_SCSI_TASK_MANAGEMENT , V1 0x8F7F, V2 0x8F7D
600 * are not supported here. Should pass zero and set after the call
601 */
602 act &= cpu_to_be16(~0x0080); /* V1 action code */
603
604 OSD_DEBUG("OSDv1 execute opcode 0x%x\n", be16_to_cpu(act));
605
606 ocdb->h.varlen_cdb.opcode = VARIABLE_LENGTH_CMD;
607 ocdb->h.varlen_cdb.additional_cdb_length = OSD_ADDITIONAL_CDB_LENGTH;
608 ocdb->h.varlen_cdb.service_action = act;
609
610 ocdb->h.partition = cpu_to_be64(obj->partition);
611 ocdb->h.object = cpu_to_be64(obj->id);
612 ocdb->h.v1.length = cpu_to_be64(len);
613 ocdb->h.v1.start_address = cpu_to_be64(offset);
614 }
615
616 static void _osdv2_req_encode_common(struct osd_request *or,
617 __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
618 {
619 struct osdv2_cdb *ocdb = &or->cdb.v2;
620
621 OSD_DEBUG("OSDv2 execute opcode 0x%x\n", be16_to_cpu(act));
622
623 ocdb->h.varlen_cdb.opcode = VARIABLE_LENGTH_CMD;
624 ocdb->h.varlen_cdb.additional_cdb_length = OSD_ADDITIONAL_CDB_LENGTH;
625 ocdb->h.varlen_cdb.service_action = act;
626
627 ocdb->h.partition = cpu_to_be64(obj->partition);
628 ocdb->h.object = cpu_to_be64(obj->id);
629 ocdb->h.v2.length = cpu_to_be64(len);
630 ocdb->h.v2.start_address = cpu_to_be64(offset);
631 }
632
633 static void _osd_req_encode_common(struct osd_request *or,
634 __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
635 {
636 if (osd_req_is_ver1(or))
637 _osdv1_req_encode_common(or, act, obj, offset, len);
638 else
639 _osdv2_req_encode_common(or, act, obj, offset, len);
640 }
641
642 /*
643 * Device commands
644 */
645 /*TODO: void osd_req_set_master_seed_xchg(struct osd_request *, ...); */
646 /*TODO: void osd_req_set_master_key(struct osd_request *, ...); */
647
648 void osd_req_format(struct osd_request *or, u64 tot_capacity)
649 {
650 _osd_req_encode_common(or, OSD_ACT_FORMAT_OSD, &osd_root_object, 0,
651 tot_capacity);
652 }
653 EXPORT_SYMBOL(osd_req_format);
654
655 int osd_req_list_dev_partitions(struct osd_request *or,
656 osd_id initial_id, struct osd_obj_id_list *list, unsigned nelem)
657 {
658 return osd_req_list_partition_objects(or, 0, initial_id, list, nelem);
659 }
660 EXPORT_SYMBOL(osd_req_list_dev_partitions);
661
662 static void _osd_req_encode_flush(struct osd_request *or,
663 enum osd_options_flush_scope_values op)
664 {
665 struct osd_cdb_head *ocdb = osd_cdb_head(&or->cdb);
666
667 ocdb->command_specific_options = op;
668 }
669
670 void osd_req_flush_obsd(struct osd_request *or,
671 enum osd_options_flush_scope_values op)
672 {
673 _osd_req_encode_common(or, OSD_ACT_FLUSH_OSD, &osd_root_object, 0, 0);
674 _osd_req_encode_flush(or, op);
675 }
676 EXPORT_SYMBOL(osd_req_flush_obsd);
677
678 /*TODO: void osd_req_perform_scsi_command(struct osd_request *,
679 const u8 *cdb, ...); */
680 /*TODO: void osd_req_task_management(struct osd_request *, ...); */
681
682 /*
683 * Partition commands
684 */
685 static void _osd_req_encode_partition(struct osd_request *or,
686 __be16 act, osd_id partition)
687 {
688 struct osd_obj_id par = {
689 .partition = partition,
690 .id = 0,
691 };
692
693 _osd_req_encode_common(or, act, &par, 0, 0);
694 }
695
696 void osd_req_create_partition(struct osd_request *or, osd_id partition)
697 {
698 _osd_req_encode_partition(or, OSD_ACT_CREATE_PARTITION, partition);
699 }
700 EXPORT_SYMBOL(osd_req_create_partition);
701
702 void osd_req_remove_partition(struct osd_request *or, osd_id partition)
703 {
704 _osd_req_encode_partition(or, OSD_ACT_REMOVE_PARTITION, partition);
705 }
706 EXPORT_SYMBOL(osd_req_remove_partition);
707
708 /*TODO: void osd_req_set_partition_key(struct osd_request *,
709 osd_id partition, u8 new_key_id[OSD_CRYPTO_KEYID_SIZE],
710 u8 seed[OSD_CRYPTO_SEED_SIZE]); */
711
712 static int _osd_req_list_objects(struct osd_request *or,
713 __be16 action, const struct osd_obj_id *obj, osd_id initial_id,
714 struct osd_obj_id_list *list, unsigned nelem)
715 {
716 struct request_queue *q = osd_request_queue(or->osd_dev);
717 u64 len = nelem * sizeof(osd_id) + sizeof(*list);
718 struct bio *bio;
719
720 _osd_req_encode_common(or, action, obj, (u64)initial_id, len);
721
722 if (list->list_identifier)
723 _osd_req_encode_olist(or, list);
724
725 WARN_ON(or->in.bio);
726 bio = bio_map_kern(q, list, len, or->alloc_flags);
727 if (IS_ERR(bio)) {
728 OSD_ERR("!!! Failed to allocate list_objects BIO\n");
729 return PTR_ERR(bio);
730 }
731
732 bio_set_op_attrs(bio, REQ_OP_READ, 0);
733 or->in.bio = bio;
734 or->in.total_bytes = bio->bi_iter.bi_size;
735 return 0;
736 }
737
738 int osd_req_list_partition_collections(struct osd_request *or,
739 osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
740 unsigned nelem)
741 {
742 struct osd_obj_id par = {
743 .partition = partition,
744 .id = 0,
745 };
746
747 return osd_req_list_collection_objects(or, &par, initial_id, list,
748 nelem);
749 }
750 EXPORT_SYMBOL(osd_req_list_partition_collections);
751
752 int osd_req_list_partition_objects(struct osd_request *or,
753 osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
754 unsigned nelem)
755 {
756 struct osd_obj_id par = {
757 .partition = partition,
758 .id = 0,
759 };
760
761 return _osd_req_list_objects(or, OSD_ACT_LIST, &par, initial_id, list,
762 nelem);
763 }
764 EXPORT_SYMBOL(osd_req_list_partition_objects);
765
766 void osd_req_flush_partition(struct osd_request *or,
767 osd_id partition, enum osd_options_flush_scope_values op)
768 {
769 _osd_req_encode_partition(or, OSD_ACT_FLUSH_PARTITION, partition);
770 _osd_req_encode_flush(or, op);
771 }
772 EXPORT_SYMBOL(osd_req_flush_partition);
773
774 /*
775 * Collection commands
776 */
777 /*TODO: void osd_req_create_collection(struct osd_request *,
778 const struct osd_obj_id *); */
779 /*TODO: void osd_req_remove_collection(struct osd_request *,
780 const struct osd_obj_id *); */
781
782 int osd_req_list_collection_objects(struct osd_request *or,
783 const struct osd_obj_id *obj, osd_id initial_id,
784 struct osd_obj_id_list *list, unsigned nelem)
785 {
786 return _osd_req_list_objects(or, OSD_ACT_LIST_COLLECTION, obj,
787 initial_id, list, nelem);
788 }
789 EXPORT_SYMBOL(osd_req_list_collection_objects);
790
791 /*TODO: void query(struct osd_request *, ...); V2 */
792
793 void osd_req_flush_collection(struct osd_request *or,
794 const struct osd_obj_id *obj, enum osd_options_flush_scope_values op)
795 {
796 _osd_req_encode_common(or, OSD_ACT_FLUSH_PARTITION, obj, 0, 0);
797 _osd_req_encode_flush(or, op);
798 }
799 EXPORT_SYMBOL(osd_req_flush_collection);
800
801 /*TODO: void get_member_attrs(struct osd_request *, ...); V2 */
802 /*TODO: void set_member_attrs(struct osd_request *, ...); V2 */
803
804 /*
805 * Object commands
806 */
807 void osd_req_create_object(struct osd_request *or, struct osd_obj_id *obj)
808 {
809 _osd_req_encode_common(or, OSD_ACT_CREATE, obj, 0, 0);
810 }
811 EXPORT_SYMBOL(osd_req_create_object);
812
813 void osd_req_remove_object(struct osd_request *or, struct osd_obj_id *obj)
814 {
815 _osd_req_encode_common(or, OSD_ACT_REMOVE, obj, 0, 0);
816 }
817 EXPORT_SYMBOL(osd_req_remove_object);
818
819
820 /*TODO: void osd_req_create_multi(struct osd_request *or,
821 struct osd_obj_id *first, struct osd_obj_id_list *list, unsigned nelem);
822 */
823
824 void osd_req_write(struct osd_request *or,
825 const struct osd_obj_id *obj, u64 offset,
826 struct bio *bio, u64 len)
827 {
828 _osd_req_encode_common(or, OSD_ACT_WRITE, obj, offset, len);
829 WARN_ON(or->out.bio || or->out.total_bytes);
830 WARN_ON(!op_is_write(bio_op(bio)));
831 or->out.bio = bio;
832 or->out.total_bytes = len;
833 }
834 EXPORT_SYMBOL(osd_req_write);
835
836 int osd_req_write_kern(struct osd_request *or,
837 const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
838 {
839 struct request_queue *req_q = osd_request_queue(or->osd_dev);
840 struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
841
842 if (IS_ERR(bio))
843 return PTR_ERR(bio);
844
845 bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
846 osd_req_write(or, obj, offset, bio, len);
847 return 0;
848 }
849 EXPORT_SYMBOL(osd_req_write_kern);
850
851 /*TODO: void osd_req_append(struct osd_request *,
852 const struct osd_obj_id *, struct bio *data_out); */
853 /*TODO: void osd_req_create_write(struct osd_request *,
854 const struct osd_obj_id *, struct bio *data_out, u64 offset); */
855 /*TODO: void osd_req_clear(struct osd_request *,
856 const struct osd_obj_id *, u64 offset, u64 len); */
857 /*TODO: void osd_req_punch(struct osd_request *,
858 const struct osd_obj_id *, u64 offset, u64 len); V2 */
859
860 void osd_req_flush_object(struct osd_request *or,
861 const struct osd_obj_id *obj, enum osd_options_flush_scope_values op,
862 /*V2*/ u64 offset, /*V2*/ u64 len)
863 {
864 if (unlikely(osd_req_is_ver1(or) && (offset || len))) {
865 OSD_DEBUG("OSD Ver1 flush on specific range ignored\n");
866 offset = 0;
867 len = 0;
868 }
869
870 _osd_req_encode_common(or, OSD_ACT_FLUSH, obj, offset, len);
871 _osd_req_encode_flush(or, op);
872 }
873 EXPORT_SYMBOL(osd_req_flush_object);
874
875 void osd_req_read(struct osd_request *or,
876 const struct osd_obj_id *obj, u64 offset,
877 struct bio *bio, u64 len)
878 {
879 _osd_req_encode_common(or, OSD_ACT_READ, obj, offset, len);
880 WARN_ON(or->in.bio || or->in.total_bytes);
881 WARN_ON(op_is_write(bio_op(bio)));
882 or->in.bio = bio;
883 or->in.total_bytes = len;
884 }
885 EXPORT_SYMBOL(osd_req_read);
886
887 int osd_req_read_kern(struct osd_request *or,
888 const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
889 {
890 struct request_queue *req_q = osd_request_queue(or->osd_dev);
891 struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
892
893 if (IS_ERR(bio))
894 return PTR_ERR(bio);
895
896 osd_req_read(or, obj, offset, bio, len);
897 return 0;
898 }
899 EXPORT_SYMBOL(osd_req_read_kern);
900
901 static int _add_sg_continuation_descriptor(struct osd_request *or,
902 const struct osd_sg_entry *sglist, unsigned numentries, u64 *len)
903 {
904 struct osd_sg_continuation_descriptor *oscd;
905 u32 oscd_size;
906 unsigned i;
907 int ret;
908
909 oscd_size = sizeof(*oscd) + numentries * sizeof(oscd->entries[0]);
910
911 if (!or->cdb_cont.total_bytes) {
912 /* First time, jump over the header, we will write to:
913 * cdb_cont.buff + cdb_cont.total_bytes
914 */
915 or->cdb_cont.total_bytes =
916 sizeof(struct osd_continuation_segment_header);
917 }
918
919 ret = _alloc_cdb_cont(or, or->cdb_cont.total_bytes + oscd_size);
920 if (unlikely(ret))
921 return ret;
922
923 oscd = or->cdb_cont.buff + or->cdb_cont.total_bytes;
924 oscd->hdr.type = cpu_to_be16(SCATTER_GATHER_LIST);
925 oscd->hdr.pad_length = 0;
926 oscd->hdr.length = cpu_to_be32(oscd_size - sizeof(*oscd));
927
928 *len = 0;
929 /* copy the sg entries and convert to network byte order */
930 for (i = 0; i < numentries; i++) {
931 oscd->entries[i].offset = cpu_to_be64(sglist[i].offset);
932 oscd->entries[i].len = cpu_to_be64(sglist[i].len);
933 *len += sglist[i].len;
934 }
935
936 or->cdb_cont.total_bytes += oscd_size;
937 OSD_DEBUG("total_bytes=%d oscd_size=%d numentries=%d\n",
938 or->cdb_cont.total_bytes, oscd_size, numentries);
939 return 0;
940 }
941
942 static int _osd_req_finalize_cdb_cont(struct osd_request *or, const u8 *cap_key)
943 {
944 struct request_queue *req_q = osd_request_queue(or->osd_dev);
945 struct bio *bio;
946 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
947 struct osd_continuation_segment_header *cont_seg_hdr;
948
949 if (!or->cdb_cont.total_bytes)
950 return 0;
951
952 cont_seg_hdr = or->cdb_cont.buff;
953 cont_seg_hdr->format = CDB_CONTINUATION_FORMAT_V2;
954 cont_seg_hdr->service_action = cdbh->varlen_cdb.service_action;
955
956 /* create a bio for continuation segment */
957 bio = bio_map_kern(req_q, or->cdb_cont.buff, or->cdb_cont.total_bytes,
958 GFP_KERNEL);
959 if (IS_ERR(bio))
960 return PTR_ERR(bio);
961
962 bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
963
964 /* integrity check the continuation before the bio is linked
965 * with the other data segments since the continuation
966 * integrity is separate from the other data segments.
967 */
968 osd_sec_sign_data(cont_seg_hdr->integrity_check, bio, cap_key);
969
970 cdbh->v2.cdb_continuation_length = cpu_to_be32(or->cdb_cont.total_bytes);
971
972 /* we can't use _req_append_segment, because we need to link in the
973 * continuation bio to the head of the bio list - the
974 * continuation segment (if it exists) is always the first segment in
975 * the out data buffer.
976 */
977 bio->bi_next = or->out.bio;
978 or->out.bio = bio;
979 or->out.total_bytes += or->cdb_cont.total_bytes;
980
981 return 0;
982 }
983
984 /* osd_req_write_sg: Takes a @bio that points to the data out buffer and an
985 * @sglist that has the scatter gather entries. Scatter-gather enables a write
986 * of multiple none-contiguous areas of an object, in a single call. The extents
987 * may overlap and/or be in any order. The only constrain is that:
988 * total_bytes(sglist) >= total_bytes(bio)
989 */
990 int osd_req_write_sg(struct osd_request *or,
991 const struct osd_obj_id *obj, struct bio *bio,
992 const struct osd_sg_entry *sglist, unsigned numentries)
993 {
994 u64 len;
995 int ret = _add_sg_continuation_descriptor(or, sglist, numentries, &len);
996
997 if (ret)
998 return ret;
999 osd_req_write(or, obj, 0, bio, len);
1000
1001 return 0;
1002 }
1003 EXPORT_SYMBOL(osd_req_write_sg);
1004
1005 /* osd_req_read_sg: Read multiple extents of an object into @bio
1006 * See osd_req_write_sg
1007 */
1008 int osd_req_read_sg(struct osd_request *or,
1009 const struct osd_obj_id *obj, struct bio *bio,
1010 const struct osd_sg_entry *sglist, unsigned numentries)
1011 {
1012 u64 len;
1013 u64 off;
1014 int ret;
1015
1016 if (numentries > 1) {
1017 off = 0;
1018 ret = _add_sg_continuation_descriptor(or, sglist, numentries,
1019 &len);
1020 if (ret)
1021 return ret;
1022 } else {
1023 /* Optimize the case of single segment, read_sg is a
1024 * bidi operation.
1025 */
1026 len = sglist->len;
1027 off = sglist->offset;
1028 }
1029 osd_req_read(or, obj, off, bio, len);
1030
1031 return 0;
1032 }
1033 EXPORT_SYMBOL(osd_req_read_sg);
1034
1035 /* SG-list write/read Kern API
1036 *
1037 * osd_req_{write,read}_sg_kern takes an array of @buff pointers and an array
1038 * of sg_entries. @numentries indicates how many pointers and sg_entries there
1039 * are. By requiring an array of buff pointers. This allows a caller to do a
1040 * single write/read and scatter into multiple buffers.
1041 * NOTE: Each buffer + len should not cross a page boundary.
1042 */
1043 static struct bio *_create_sg_bios(struct osd_request *or,
1044 void **buff, const struct osd_sg_entry *sglist, unsigned numentries)
1045 {
1046 struct request_queue *q = osd_request_queue(or->osd_dev);
1047 struct bio *bio;
1048 unsigned i;
1049
1050 bio = bio_kmalloc(GFP_KERNEL, numentries);
1051 if (unlikely(!bio)) {
1052 OSD_DEBUG("Failed to allocate BIO size=%u\n", numentries);
1053 return ERR_PTR(-ENOMEM);
1054 }
1055
1056 for (i = 0; i < numentries; i++) {
1057 unsigned offset = offset_in_page(buff[i]);
1058 struct page *page = virt_to_page(buff[i]);
1059 unsigned len = sglist[i].len;
1060 unsigned added_len;
1061
1062 BUG_ON(offset + len > PAGE_SIZE);
1063 added_len = bio_add_pc_page(q, bio, page, len, offset);
1064 if (unlikely(len != added_len)) {
1065 OSD_DEBUG("bio_add_pc_page len(%d) != added_len(%d)\n",
1066 len, added_len);
1067 bio_put(bio);
1068 return ERR_PTR(-ENOMEM);
1069 }
1070 }
1071
1072 return bio;
1073 }
1074
1075 int osd_req_write_sg_kern(struct osd_request *or,
1076 const struct osd_obj_id *obj, void **buff,
1077 const struct osd_sg_entry *sglist, unsigned numentries)
1078 {
1079 struct bio *bio = _create_sg_bios(or, buff, sglist, numentries);
1080 if (IS_ERR(bio))
1081 return PTR_ERR(bio);
1082
1083 bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
1084 osd_req_write_sg(or, obj, bio, sglist, numentries);
1085
1086 return 0;
1087 }
1088 EXPORT_SYMBOL(osd_req_write_sg_kern);
1089
1090 int osd_req_read_sg_kern(struct osd_request *or,
1091 const struct osd_obj_id *obj, void **buff,
1092 const struct osd_sg_entry *sglist, unsigned numentries)
1093 {
1094 struct bio *bio = _create_sg_bios(or, buff, sglist, numentries);
1095 if (IS_ERR(bio))
1096 return PTR_ERR(bio);
1097
1098 osd_req_read_sg(or, obj, bio, sglist, numentries);
1099
1100 return 0;
1101 }
1102 EXPORT_SYMBOL(osd_req_read_sg_kern);
1103
1104
1105
1106 void osd_req_get_attributes(struct osd_request *or,
1107 const struct osd_obj_id *obj)
1108 {
1109 _osd_req_encode_common(or, OSD_ACT_GET_ATTRIBUTES, obj, 0, 0);
1110 }
1111 EXPORT_SYMBOL(osd_req_get_attributes);
1112
1113 void osd_req_set_attributes(struct osd_request *or,
1114 const struct osd_obj_id *obj)
1115 {
1116 _osd_req_encode_common(or, OSD_ACT_SET_ATTRIBUTES, obj, 0, 0);
1117 }
1118 EXPORT_SYMBOL(osd_req_set_attributes);
1119
1120 /*
1121 * Attributes List-mode
1122 */
1123
1124 int osd_req_add_set_attr_list(struct osd_request *or,
1125 const struct osd_attr *oa, unsigned nelem)
1126 {
1127 unsigned total_bytes = or->set_attr.total_bytes;
1128 void *attr_last;
1129 int ret;
1130
1131 if (or->attributes_mode &&
1132 or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
1133 WARN_ON(1);
1134 return -EINVAL;
1135 }
1136 or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
1137
1138 if (!total_bytes) { /* first-time: allocate and put list header */
1139 total_bytes = _osd_req_sizeof_alist_header(or);
1140 ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
1141 if (ret)
1142 return ret;
1143 _osd_req_set_alist_type(or, or->set_attr.buff,
1144 OSD_ATTR_LIST_SET_RETRIEVE);
1145 }
1146 attr_last = or->set_attr.buff + total_bytes;
1147
1148 for (; nelem; --nelem) {
1149 unsigned elem_size = _osd_req_alist_elem_size(or, oa->len);
1150
1151 total_bytes += elem_size;
1152 if (unlikely(or->set_attr.alloc_size < total_bytes)) {
1153 or->set_attr.total_bytes = total_bytes - elem_size;
1154 ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
1155 if (ret)
1156 return ret;
1157 attr_last =
1158 or->set_attr.buff + or->set_attr.total_bytes;
1159 }
1160
1161 _osd_req_alist_elem_encode(or, attr_last, oa);
1162
1163 attr_last += elem_size;
1164 ++oa;
1165 }
1166
1167 or->set_attr.total_bytes = total_bytes;
1168 return 0;
1169 }
1170 EXPORT_SYMBOL(osd_req_add_set_attr_list);
1171
1172 static int _req_append_segment(struct osd_request *or,
1173 unsigned padding, struct _osd_req_data_segment *seg,
1174 struct _osd_req_data_segment *last_seg, struct _osd_io_info *io)
1175 {
1176 void *pad_buff;
1177 int ret;
1178
1179 if (padding) {
1180 /* check if we can just add it to last buffer */
1181 if (last_seg &&
1182 (padding <= last_seg->alloc_size - last_seg->total_bytes))
1183 pad_buff = last_seg->buff + last_seg->total_bytes;
1184 else
1185 pad_buff = io->pad_buff;
1186
1187 ret = blk_rq_map_kern(io->req->q, io->req, pad_buff, padding,
1188 or->alloc_flags);
1189 if (ret)
1190 return ret;
1191 io->total_bytes += padding;
1192 }
1193
1194 ret = blk_rq_map_kern(io->req->q, io->req, seg->buff, seg->total_bytes,
1195 or->alloc_flags);
1196 if (ret)
1197 return ret;
1198
1199 io->total_bytes += seg->total_bytes;
1200 OSD_DEBUG("padding=%d buff=%p total_bytes=%d\n", padding, seg->buff,
1201 seg->total_bytes);
1202 return 0;
1203 }
1204
1205 static int _osd_req_finalize_set_attr_list(struct osd_request *or)
1206 {
1207 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1208 unsigned padding;
1209 int ret;
1210
1211 if (!or->set_attr.total_bytes) {
1212 cdbh->attrs_list.set_attr_offset = OSD_OFFSET_UNUSED;
1213 return 0;
1214 }
1215
1216 cdbh->attrs_list.set_attr_bytes = cpu_to_be32(or->set_attr.total_bytes);
1217 cdbh->attrs_list.set_attr_offset =
1218 osd_req_encode_offset(or, or->out.total_bytes, &padding);
1219
1220 ret = _req_append_segment(or, padding, &or->set_attr,
1221 or->out.last_seg, &or->out);
1222 if (ret)
1223 return ret;
1224
1225 or->out.last_seg = &or->set_attr;
1226 return 0;
1227 }
1228
1229 int osd_req_add_get_attr_list(struct osd_request *or,
1230 const struct osd_attr *oa, unsigned nelem)
1231 {
1232 unsigned total_bytes = or->enc_get_attr.total_bytes;
1233 void *attr_last;
1234 int ret;
1235
1236 if (or->attributes_mode &&
1237 or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
1238 WARN_ON(1);
1239 return -EINVAL;
1240 }
1241 or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
1242
1243 /* first time calc data-in list header size */
1244 if (!or->get_attr.total_bytes)
1245 or->get_attr.total_bytes = _osd_req_sizeof_alist_header(or);
1246
1247 /* calc data-out info */
1248 if (!total_bytes) { /* first-time: allocate and put list header */
1249 unsigned max_bytes;
1250
1251 total_bytes = _osd_req_sizeof_alist_header(or);
1252 max_bytes = total_bytes +
1253 nelem * sizeof(struct osd_attributes_list_attrid);
1254 ret = _alloc_get_attr_desc(or, max_bytes);
1255 if (ret)
1256 return ret;
1257
1258 _osd_req_set_alist_type(or, or->enc_get_attr.buff,
1259 OSD_ATTR_LIST_GET);
1260 }
1261 attr_last = or->enc_get_attr.buff + total_bytes;
1262
1263 for (; nelem; --nelem) {
1264 struct osd_attributes_list_attrid *attrid;
1265 const unsigned cur_size = sizeof(*attrid);
1266
1267 total_bytes += cur_size;
1268 if (unlikely(or->enc_get_attr.alloc_size < total_bytes)) {
1269 or->enc_get_attr.total_bytes = total_bytes - cur_size;
1270 ret = _alloc_get_attr_desc(or,
1271 total_bytes + nelem * sizeof(*attrid));
1272 if (ret)
1273 return ret;
1274 attr_last = or->enc_get_attr.buff +
1275 or->enc_get_attr.total_bytes;
1276 }
1277
1278 attrid = attr_last;
1279 attrid->attr_page = cpu_to_be32(oa->attr_page);
1280 attrid->attr_id = cpu_to_be32(oa->attr_id);
1281
1282 attr_last += cur_size;
1283
1284 /* calc data-in size */
1285 or->get_attr.total_bytes +=
1286 _osd_req_alist_elem_size(or, oa->len);
1287 ++oa;
1288 }
1289
1290 or->enc_get_attr.total_bytes = total_bytes;
1291
1292 OSD_DEBUG(
1293 "get_attr.total_bytes=%u(%u) enc_get_attr.total_bytes=%u(%zu)\n",
1294 or->get_attr.total_bytes,
1295 or->get_attr.total_bytes - _osd_req_sizeof_alist_header(or),
1296 or->enc_get_attr.total_bytes,
1297 (or->enc_get_attr.total_bytes - _osd_req_sizeof_alist_header(or))
1298 / sizeof(struct osd_attributes_list_attrid));
1299
1300 return 0;
1301 }
1302 EXPORT_SYMBOL(osd_req_add_get_attr_list);
1303
1304 static int _osd_req_finalize_get_attr_list(struct osd_request *or)
1305 {
1306 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1307 unsigned out_padding;
1308 unsigned in_padding;
1309 int ret;
1310
1311 if (!or->enc_get_attr.total_bytes) {
1312 cdbh->attrs_list.get_attr_desc_offset = OSD_OFFSET_UNUSED;
1313 cdbh->attrs_list.get_attr_offset = OSD_OFFSET_UNUSED;
1314 return 0;
1315 }
1316
1317 ret = _alloc_get_attr_list(or);
1318 if (ret)
1319 return ret;
1320
1321 /* The out-going buffer info update */
1322 OSD_DEBUG("out-going\n");
1323 cdbh->attrs_list.get_attr_desc_bytes =
1324 cpu_to_be32(or->enc_get_attr.total_bytes);
1325
1326 cdbh->attrs_list.get_attr_desc_offset =
1327 osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
1328
1329 ret = _req_append_segment(or, out_padding, &or->enc_get_attr,
1330 or->out.last_seg, &or->out);
1331 if (ret)
1332 return ret;
1333 or->out.last_seg = &or->enc_get_attr;
1334
1335 /* The incoming buffer info update */
1336 OSD_DEBUG("in-coming\n");
1337 cdbh->attrs_list.get_attr_alloc_length =
1338 cpu_to_be32(or->get_attr.total_bytes);
1339
1340 cdbh->attrs_list.get_attr_offset =
1341 osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
1342
1343 ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
1344 &or->in);
1345 if (ret)
1346 return ret;
1347 or->in.last_seg = &or->get_attr;
1348
1349 return 0;
1350 }
1351
1352 int osd_req_decode_get_attr_list(struct osd_request *or,
1353 struct osd_attr *oa, int *nelem, void **iterator)
1354 {
1355 unsigned cur_bytes, returned_bytes;
1356 int n;
1357 const unsigned sizeof_attr_list = _osd_req_sizeof_alist_header(or);
1358 void *cur_p;
1359
1360 if (!_osd_req_is_alist_type(or, or->get_attr.buff,
1361 OSD_ATTR_LIST_SET_RETRIEVE)) {
1362 oa->attr_page = 0;
1363 oa->attr_id = 0;
1364 oa->val_ptr = NULL;
1365 oa->len = 0;
1366 *iterator = NULL;
1367 return 0;
1368 }
1369
1370 if (*iterator) {
1371 BUG_ON((*iterator < or->get_attr.buff) ||
1372 (or->get_attr.buff + or->get_attr.alloc_size < *iterator));
1373 cur_p = *iterator;
1374 cur_bytes = (*iterator - or->get_attr.buff) - sizeof_attr_list;
1375 returned_bytes = or->get_attr.total_bytes;
1376 } else { /* first time decode the list header */
1377 cur_bytes = sizeof_attr_list;
1378 returned_bytes = _osd_req_alist_size(or, or->get_attr.buff) +
1379 sizeof_attr_list;
1380
1381 cur_p = or->get_attr.buff + sizeof_attr_list;
1382
1383 if (returned_bytes > or->get_attr.alloc_size) {
1384 OSD_DEBUG("target report: space was not big enough! "
1385 "Allocate=%u Needed=%u\n",
1386 or->get_attr.alloc_size,
1387 returned_bytes + sizeof_attr_list);
1388
1389 returned_bytes =
1390 or->get_attr.alloc_size - sizeof_attr_list;
1391 }
1392 or->get_attr.total_bytes = returned_bytes;
1393 }
1394
1395 for (n = 0; (n < *nelem) && (cur_bytes < returned_bytes); ++n) {
1396 int inc = _osd_req_alist_elem_decode(or, cur_p, oa,
1397 returned_bytes - cur_bytes);
1398
1399 if (inc < 0) {
1400 OSD_ERR("BAD FOOD from target. list not valid!"
1401 "c=%d r=%d n=%d\n",
1402 cur_bytes, returned_bytes, n);
1403 oa->val_ptr = NULL;
1404 cur_bytes = returned_bytes; /* break the caller loop */
1405 break;
1406 }
1407
1408 cur_bytes += inc;
1409 cur_p += inc;
1410 ++oa;
1411 }
1412
1413 *iterator = (returned_bytes - cur_bytes) ? cur_p : NULL;
1414 *nelem = n;
1415 return returned_bytes - cur_bytes;
1416 }
1417 EXPORT_SYMBOL(osd_req_decode_get_attr_list);
1418
1419 /*
1420 * Attributes Page-mode
1421 */
1422
1423 int osd_req_add_get_attr_page(struct osd_request *or,
1424 u32 page_id, void *attar_page, unsigned max_page_len,
1425 const struct osd_attr *set_one_attr)
1426 {
1427 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1428
1429 if (or->attributes_mode &&
1430 or->attributes_mode != OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
1431 WARN_ON(1);
1432 return -EINVAL;
1433 }
1434 or->attributes_mode = OSD_CDB_GET_ATTR_PAGE_SET_ONE;
1435
1436 or->get_attr.buff = attar_page;
1437 or->get_attr.total_bytes = max_page_len;
1438
1439 cdbh->attrs_page.get_attr_page = cpu_to_be32(page_id);
1440 cdbh->attrs_page.get_attr_alloc_length = cpu_to_be32(max_page_len);
1441
1442 if (!set_one_attr || !set_one_attr->attr_page)
1443 return 0; /* The set is optional */
1444
1445 or->set_attr.buff = set_one_attr->val_ptr;
1446 or->set_attr.total_bytes = set_one_attr->len;
1447
1448 cdbh->attrs_page.set_attr_page = cpu_to_be32(set_one_attr->attr_page);
1449 cdbh->attrs_page.set_attr_id = cpu_to_be32(set_one_attr->attr_id);
1450 cdbh->attrs_page.set_attr_length = cpu_to_be32(set_one_attr->len);
1451 return 0;
1452 }
1453 EXPORT_SYMBOL(osd_req_add_get_attr_page);
1454
1455 static int _osd_req_finalize_attr_page(struct osd_request *or)
1456 {
1457 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1458 unsigned in_padding, out_padding;
1459 int ret;
1460
1461 /* returned page */
1462 cdbh->attrs_page.get_attr_offset =
1463 osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
1464
1465 ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
1466 &or->in);
1467 if (ret)
1468 return ret;
1469
1470 if (or->set_attr.total_bytes == 0)
1471 return 0;
1472
1473 /* set one value */
1474 cdbh->attrs_page.set_attr_offset =
1475 osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
1476
1477 ret = _req_append_segment(or, out_padding, &or->set_attr, NULL,
1478 &or->out);
1479 return ret;
1480 }
1481
1482 static inline void osd_sec_parms_set_out_offset(bool is_v1,
1483 struct osd_security_parameters *sec_parms, osd_cdb_offset offset)
1484 {
1485 if (is_v1)
1486 sec_parms->v1.data_out_integrity_check_offset = offset;
1487 else
1488 sec_parms->v2.data_out_integrity_check_offset = offset;
1489 }
1490
1491 static inline void osd_sec_parms_set_in_offset(bool is_v1,
1492 struct osd_security_parameters *sec_parms, osd_cdb_offset offset)
1493 {
1494 if (is_v1)
1495 sec_parms->v1.data_in_integrity_check_offset = offset;
1496 else
1497 sec_parms->v2.data_in_integrity_check_offset = offset;
1498 }
1499
1500 static int _osd_req_finalize_data_integrity(struct osd_request *or,
1501 bool has_in, bool has_out, struct bio *out_data_bio, u64 out_data_bytes,
1502 const u8 *cap_key)
1503 {
1504 struct osd_security_parameters *sec_parms = _osd_req_sec_params(or);
1505 int ret;
1506
1507 if (!osd_is_sec_alldata(sec_parms))
1508 return 0;
1509
1510 if (has_out) {
1511 struct _osd_req_data_segment seg = {
1512 .buff = &or->out_data_integ,
1513 .total_bytes = sizeof(or->out_data_integ),
1514 };
1515 unsigned pad;
1516
1517 or->out_data_integ.data_bytes = cpu_to_be64(out_data_bytes);
1518 or->out_data_integ.set_attributes_bytes = cpu_to_be64(
1519 or->set_attr.total_bytes);
1520 or->out_data_integ.get_attributes_bytes = cpu_to_be64(
1521 or->enc_get_attr.total_bytes);
1522
1523 osd_sec_parms_set_out_offset(osd_req_is_ver1(or), sec_parms,
1524 osd_req_encode_offset(or, or->out.total_bytes, &pad));
1525
1526 ret = _req_append_segment(or, pad, &seg, or->out.last_seg,
1527 &or->out);
1528 if (ret)
1529 return ret;
1530 or->out.last_seg = NULL;
1531
1532 /* they are now all chained to request sign them all together */
1533 osd_sec_sign_data(&or->out_data_integ, out_data_bio,
1534 cap_key);
1535 }
1536
1537 if (has_in) {
1538 struct _osd_req_data_segment seg = {
1539 .buff = &or->in_data_integ,
1540 .total_bytes = sizeof(or->in_data_integ),
1541 };
1542 unsigned pad;
1543
1544 osd_sec_parms_set_in_offset(osd_req_is_ver1(or), sec_parms,
1545 osd_req_encode_offset(or, or->in.total_bytes, &pad));
1546
1547 ret = _req_append_segment(or, pad, &seg, or->in.last_seg,
1548 &or->in);
1549 if (ret)
1550 return ret;
1551
1552 or->in.last_seg = NULL;
1553 }
1554
1555 return 0;
1556 }
1557
1558 /*
1559 * osd_finalize_request and helpers
1560 */
1561 static struct request *_make_request(struct request_queue *q, bool has_write,
1562 struct _osd_io_info *oii, gfp_t flags)
1563 {
1564 struct request *req;
1565 struct bio *bio = oii->bio;
1566 int ret;
1567
1568 req = blk_get_request(q, has_write ? REQ_OP_SCSI_OUT : REQ_OP_SCSI_IN,
1569 flags);
1570 if (IS_ERR(req))
1571 return req;
1572 scsi_req_init(req);
1573
1574 for_each_bio(bio) {
1575 struct bio *bounce_bio = bio;
1576
1577 blk_queue_bounce(req->q, &bounce_bio);
1578 ret = blk_rq_append_bio(req, bounce_bio);
1579 if (ret)
1580 return ERR_PTR(ret);
1581 }
1582
1583 return req;
1584 }
1585
1586 static int _init_blk_request(struct osd_request *or,
1587 bool has_in, bool has_out)
1588 {
1589 gfp_t flags = or->alloc_flags;
1590 struct scsi_device *scsi_device = or->osd_dev->scsi_device;
1591 struct request_queue *q = scsi_device->request_queue;
1592 struct request *req;
1593 int ret;
1594
1595 req = _make_request(q, has_out, has_out ? &or->out : &or->in, flags);
1596 if (IS_ERR(req)) {
1597 ret = PTR_ERR(req);
1598 goto out;
1599 }
1600
1601 or->request = req;
1602 req->rq_flags |= RQF_QUIET;
1603
1604 req->timeout = or->timeout;
1605 req->retries = or->retries;
1606
1607 if (has_out) {
1608 or->out.req = req;
1609 if (has_in) {
1610 /* allocate bidi request */
1611 req = _make_request(q, false, &or->in, flags);
1612 if (IS_ERR(req)) {
1613 OSD_DEBUG("blk_get_request for bidi failed\n");
1614 ret = PTR_ERR(req);
1615 goto out;
1616 }
1617 scsi_req_init(req);
1618 or->in.req = or->request->next_rq = req;
1619 }
1620 } else if (has_in)
1621 or->in.req = req;
1622
1623 ret = 0;
1624 out:
1625 OSD_DEBUG("or=%p has_in=%d has_out=%d => %d, %p\n",
1626 or, has_in, has_out, ret, or->request);
1627 return ret;
1628 }
1629
1630 int osd_finalize_request(struct osd_request *or,
1631 u8 options, const void *cap, const u8 *cap_key)
1632 {
1633 struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1634 bool has_in, has_out;
1635 /* Save for data_integrity without the cdb_continuation */
1636 struct bio *out_data_bio = or->out.bio;
1637 u64 out_data_bytes = or->out.total_bytes;
1638 int ret;
1639
1640 if (options & OSD_REQ_FUA)
1641 cdbh->options |= OSD_CDB_FUA;
1642
1643 if (options & OSD_REQ_DPO)
1644 cdbh->options |= OSD_CDB_DPO;
1645
1646 if (options & OSD_REQ_BYPASS_TIMESTAMPS)
1647 cdbh->timestamp_control = OSD_CDB_BYPASS_TIMESTAMPS;
1648
1649 osd_set_caps(&or->cdb, cap);
1650
1651 has_in = or->in.bio || or->get_attr.total_bytes;
1652 has_out = or->out.bio || or->cdb_cont.total_bytes ||
1653 or->set_attr.total_bytes || or->enc_get_attr.total_bytes;
1654
1655 ret = _osd_req_finalize_cdb_cont(or, cap_key);
1656 if (ret) {
1657 OSD_DEBUG("_osd_req_finalize_cdb_cont failed\n");
1658 return ret;
1659 }
1660 ret = _init_blk_request(or, has_in, has_out);
1661 if (ret) {
1662 OSD_DEBUG("_init_blk_request failed\n");
1663 return ret;
1664 }
1665
1666 or->out.pad_buff = sg_out_pad_buffer;
1667 or->in.pad_buff = sg_in_pad_buffer;
1668
1669 if (!or->attributes_mode)
1670 or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
1671 cdbh->command_specific_options |= or->attributes_mode;
1672 if (or->attributes_mode == OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
1673 ret = _osd_req_finalize_attr_page(or);
1674 if (ret) {
1675 OSD_DEBUG("_osd_req_finalize_attr_page failed\n");
1676 return ret;
1677 }
1678 } else {
1679 /* TODO: I think that for the GET_ATTR command these 2 should
1680 * be reversed to keep them in execution order (for embedded
1681 * targets with low memory footprint)
1682 */
1683 ret = _osd_req_finalize_set_attr_list(or);
1684 if (ret) {
1685 OSD_DEBUG("_osd_req_finalize_set_attr_list failed\n");
1686 return ret;
1687 }
1688
1689 ret = _osd_req_finalize_get_attr_list(or);
1690 if (ret) {
1691 OSD_DEBUG("_osd_req_finalize_get_attr_list failed\n");
1692 return ret;
1693 }
1694 }
1695
1696 ret = _osd_req_finalize_data_integrity(or, has_in, has_out,
1697 out_data_bio, out_data_bytes,
1698 cap_key);
1699 if (ret)
1700 return ret;
1701
1702 osd_sec_sign_cdb(&or->cdb, cap_key);
1703
1704 scsi_req(or->request)->cmd = or->cdb.buff;
1705 scsi_req(or->request)->cmd_len = _osd_req_cdb_len(or);
1706
1707 return 0;
1708 }
1709 EXPORT_SYMBOL(osd_finalize_request);
1710
1711 static bool _is_osd_security_code(int code)
1712 {
1713 return (code == osd_security_audit_value_frozen) ||
1714 (code == osd_security_working_key_frozen) ||
1715 (code == osd_nonce_not_unique) ||
1716 (code == osd_nonce_timestamp_out_of_range) ||
1717 (code == osd_invalid_dataout_buffer_integrity_check_value);
1718 }
1719
1720 #define OSD_SENSE_PRINT1(fmt, a...) \
1721 do { \
1722 if (__cur_sense_need_output) \
1723 OSD_ERR(fmt, ##a); \
1724 } while (0)
1725
1726 #define OSD_SENSE_PRINT2(fmt, a...) OSD_SENSE_PRINT1(" " fmt, ##a)
1727
1728 int osd_req_decode_sense_full(struct osd_request *or,
1729 struct osd_sense_info *osi, bool silent,
1730 struct osd_obj_id *bad_obj_list __unused, int max_obj __unused,
1731 struct osd_attr *bad_attr_list, int max_attr)
1732 {
1733 int sense_len, original_sense_len;
1734 struct osd_sense_info local_osi;
1735 struct scsi_sense_descriptor_based *ssdb;
1736 void *cur_descriptor;
1737 #if (CONFIG_SCSI_OSD_DPRINT_SENSE == 0)
1738 const bool __cur_sense_need_output = false;
1739 #else
1740 bool __cur_sense_need_output = !silent;
1741 #endif
1742 int ret;
1743
1744 if (likely(!or->req_errors))
1745 return 0;
1746
1747 osi = osi ? : &local_osi;
1748 memset(osi, 0, sizeof(*osi));
1749
1750 ssdb = (typeof(ssdb))or->sense;
1751 sense_len = or->sense_len;
1752 if ((sense_len < (int)sizeof(*ssdb) || !ssdb->sense_key)) {
1753 OSD_ERR("Block-layer returned error(0x%x) but "
1754 "sense_len(%u) || key(%d) is empty\n",
1755 or->req_errors, sense_len, ssdb->sense_key);
1756 goto analyze;
1757 }
1758
1759 if ((ssdb->response_code != 0x72) && (ssdb->response_code != 0x73)) {
1760 OSD_ERR("Unrecognized scsi sense: rcode=%x length=%d\n",
1761 ssdb->response_code, sense_len);
1762 goto analyze;
1763 }
1764
1765 osi->key = ssdb->sense_key;
1766 osi->additional_code = be16_to_cpu(ssdb->additional_sense_code);
1767 original_sense_len = ssdb->additional_sense_length + 8;
1768
1769 #if (CONFIG_SCSI_OSD_DPRINT_SENSE == 1)
1770 if (__cur_sense_need_output)
1771 __cur_sense_need_output = (osi->key > scsi_sk_recovered_error);
1772 #endif
1773 OSD_SENSE_PRINT1("Main Sense information key=0x%x length(%d, %d) "
1774 "additional_code=0x%x async_error=%d errors=0x%x\n",
1775 osi->key, original_sense_len, sense_len,
1776 osi->additional_code, or->async_error,
1777 or->req_errors);
1778
1779 if (original_sense_len < sense_len)
1780 sense_len = original_sense_len;
1781
1782 cur_descriptor = ssdb->ssd;
1783 sense_len -= sizeof(*ssdb);
1784 while (sense_len > 0) {
1785 struct scsi_sense_descriptor *ssd = cur_descriptor;
1786 int cur_len = ssd->additional_length + 2;
1787
1788 sense_len -= cur_len;
1789
1790 if (sense_len < 0)
1791 break; /* sense was truncated */
1792
1793 switch (ssd->descriptor_type) {
1794 case scsi_sense_information:
1795 case scsi_sense_command_specific_information:
1796 {
1797 struct scsi_sense_command_specific_data_descriptor
1798 *sscd = cur_descriptor;
1799
1800 osi->command_info =
1801 get_unaligned_be64(&sscd->information) ;
1802 OSD_SENSE_PRINT2(
1803 "command_specific_information 0x%llx \n",
1804 _LLU(osi->command_info));
1805 break;
1806 }
1807 case scsi_sense_key_specific:
1808 {
1809 struct scsi_sense_key_specific_data_descriptor
1810 *ssks = cur_descriptor;
1811
1812 osi->sense_info = get_unaligned_be16(&ssks->value);
1813 OSD_SENSE_PRINT2(
1814 "sense_key_specific_information %u"
1815 "sksv_cd_bpv_bp (0x%x)\n",
1816 osi->sense_info, ssks->sksv_cd_bpv_bp);
1817 break;
1818 }
1819 case osd_sense_object_identification:
1820 { /*FIXME: Keep first not last, Store in array*/
1821 struct osd_sense_identification_data_descriptor
1822 *osidd = cur_descriptor;
1823
1824 osi->not_initiated_command_functions =
1825 le32_to_cpu(osidd->not_initiated_functions);
1826 osi->completed_command_functions =
1827 le32_to_cpu(osidd->completed_functions);
1828 osi->obj.partition = be64_to_cpu(osidd->partition_id);
1829 osi->obj.id = be64_to_cpu(osidd->object_id);
1830 OSD_SENSE_PRINT2(
1831 "object_identification pid=0x%llx oid=0x%llx\n",
1832 _LLU(osi->obj.partition), _LLU(osi->obj.id));
1833 OSD_SENSE_PRINT2(
1834 "not_initiated_bits(%x) "
1835 "completed_command_bits(%x)\n",
1836 osi->not_initiated_command_functions,
1837 osi->completed_command_functions);
1838 break;
1839 }
1840 case osd_sense_response_integrity_check:
1841 {
1842 struct osd_sense_response_integrity_check_descriptor
1843 *osricd = cur_descriptor;
1844 const unsigned len =
1845 sizeof(osricd->integrity_check_value);
1846 char key_dump[len*4 + 2]; /* 2nibbles+space+ASCII */
1847
1848 hex_dump_to_buffer(osricd->integrity_check_value, len,
1849 32, 1, key_dump, sizeof(key_dump), true);
1850 OSD_SENSE_PRINT2("response_integrity [%s]\n", key_dump);
1851 }
1852 case osd_sense_attribute_identification:
1853 {
1854 struct osd_sense_attributes_data_descriptor
1855 *osadd = cur_descriptor;
1856 unsigned len = min(cur_len, sense_len);
1857 struct osd_sense_attr *pattr = osadd->sense_attrs;
1858
1859 while (len >= sizeof(*pattr)) {
1860 u32 attr_page = be32_to_cpu(pattr->attr_page);
1861 u32 attr_id = be32_to_cpu(pattr->attr_id);
1862
1863 if (!osi->attr.attr_page) {
1864 osi->attr.attr_page = attr_page;
1865 osi->attr.attr_id = attr_id;
1866 }
1867
1868 if (bad_attr_list && max_attr) {
1869 bad_attr_list->attr_page = attr_page;
1870 bad_attr_list->attr_id = attr_id;
1871 bad_attr_list++;
1872 max_attr--;
1873 }
1874
1875 len -= sizeof(*pattr);
1876 OSD_SENSE_PRINT2(
1877 "osd_sense_attribute_identification"
1878 "attr_page=0x%x attr_id=0x%x\n",
1879 attr_page, attr_id);
1880 }
1881 }
1882 /*These are not legal for OSD*/
1883 case scsi_sense_field_replaceable_unit:
1884 OSD_SENSE_PRINT2("scsi_sense_field_replaceable_unit\n");
1885 break;
1886 case scsi_sense_stream_commands:
1887 OSD_SENSE_PRINT2("scsi_sense_stream_commands\n");
1888 break;
1889 case scsi_sense_block_commands:
1890 OSD_SENSE_PRINT2("scsi_sense_block_commands\n");
1891 break;
1892 case scsi_sense_ata_return:
1893 OSD_SENSE_PRINT2("scsi_sense_ata_return\n");
1894 break;
1895 default:
1896 if (ssd->descriptor_type <= scsi_sense_Reserved_last)
1897 OSD_SENSE_PRINT2(
1898 "scsi_sense Reserved descriptor (0x%x)",
1899 ssd->descriptor_type);
1900 else
1901 OSD_SENSE_PRINT2(
1902 "scsi_sense Vendor descriptor (0x%x)",
1903 ssd->descriptor_type);
1904 }
1905
1906 cur_descriptor += cur_len;
1907 }
1908
1909 analyze:
1910 if (!osi->key) {
1911 /* scsi sense is Empty, the request was never issued to target
1912 * linux return code might tell us what happened.
1913 */
1914 if (or->async_error == -ENOMEM)
1915 osi->osd_err_pri = OSD_ERR_PRI_RESOURCE;
1916 else
1917 osi->osd_err_pri = OSD_ERR_PRI_UNREACHABLE;
1918 ret = or->async_error;
1919 } else if (osi->key <= scsi_sk_recovered_error) {
1920 osi->osd_err_pri = 0;
1921 ret = 0;
1922 } else if (osi->additional_code == scsi_invalid_field_in_cdb) {
1923 if (osi->cdb_field_offset == OSD_CFO_STARTING_BYTE) {
1924 osi->osd_err_pri = OSD_ERR_PRI_CLEAR_PAGES;
1925 ret = -EFAULT; /* caller should recover from this */
1926 } else if (osi->cdb_field_offset == OSD_CFO_OBJECT_ID) {
1927 osi->osd_err_pri = OSD_ERR_PRI_NOT_FOUND;
1928 ret = -ENOENT;
1929 } else if (osi->cdb_field_offset == OSD_CFO_PERMISSIONS) {
1930 osi->osd_err_pri = OSD_ERR_PRI_NO_ACCESS;
1931 ret = -EACCES;
1932 } else {
1933 osi->osd_err_pri = OSD_ERR_PRI_BAD_CRED;
1934 ret = -EINVAL;
1935 }
1936 } else if (osi->additional_code == osd_quota_error) {
1937 osi->osd_err_pri = OSD_ERR_PRI_NO_SPACE;
1938 ret = -ENOSPC;
1939 } else if (_is_osd_security_code(osi->additional_code)) {
1940 osi->osd_err_pri = OSD_ERR_PRI_BAD_CRED;
1941 ret = -EINVAL;
1942 } else {
1943 osi->osd_err_pri = OSD_ERR_PRI_EIO;
1944 ret = -EIO;
1945 }
1946
1947 if (!or->out.residual)
1948 or->out.residual = or->out.total_bytes;
1949 if (!or->in.residual)
1950 or->in.residual = or->in.total_bytes;
1951
1952 return ret;
1953 }
1954 EXPORT_SYMBOL(osd_req_decode_sense_full);
1955
1956 /*
1957 * Implementation of osd_sec.h API
1958 * TODO: Move to a separate osd_sec.c file at a later stage.
1959 */
1960
1961 enum { OSD_SEC_CAP_V1_ALL_CAPS =
1962 OSD_SEC_CAP_APPEND | OSD_SEC_CAP_OBJ_MGMT | OSD_SEC_CAP_REMOVE |
1963 OSD_SEC_CAP_CREATE | OSD_SEC_CAP_SET_ATTR | OSD_SEC_CAP_GET_ATTR |
1964 OSD_SEC_CAP_WRITE | OSD_SEC_CAP_READ | OSD_SEC_CAP_POL_SEC |
1965 OSD_SEC_CAP_GLOBAL | OSD_SEC_CAP_DEV_MGMT
1966 };
1967
1968 enum { OSD_SEC_CAP_V2_ALL_CAPS =
1969 OSD_SEC_CAP_V1_ALL_CAPS | OSD_SEC_CAP_QUERY | OSD_SEC_CAP_M_OBJECT
1970 };
1971
1972 void osd_sec_init_nosec_doall_caps(void *caps,
1973 const struct osd_obj_id *obj, bool is_collection, const bool is_v1)
1974 {
1975 struct osd_capability *cap = caps;
1976 u8 type;
1977 u8 descriptor_type;
1978
1979 if (likely(obj->id)) {
1980 if (unlikely(is_collection)) {
1981 type = OSD_SEC_OBJ_COLLECTION;
1982 descriptor_type = is_v1 ? OSD_SEC_OBJ_DESC_OBJ :
1983 OSD_SEC_OBJ_DESC_COL;
1984 } else {
1985 type = OSD_SEC_OBJ_USER;
1986 descriptor_type = OSD_SEC_OBJ_DESC_OBJ;
1987 }
1988 WARN_ON(!obj->partition);
1989 } else {
1990 type = obj->partition ? OSD_SEC_OBJ_PARTITION :
1991 OSD_SEC_OBJ_ROOT;
1992 descriptor_type = OSD_SEC_OBJ_DESC_PAR;
1993 }
1994
1995 memset(cap, 0, sizeof(*cap));
1996
1997 cap->h.format = OSD_SEC_CAP_FORMAT_VER1;
1998 cap->h.integrity_algorithm__key_version = 0; /* MAKE_BYTE(0, 0); */
1999 cap->h.security_method = OSD_SEC_NOSEC;
2000 /* cap->expiration_time;
2001 cap->AUDIT[30-10];
2002 cap->discriminator[42-30];
2003 cap->object_created_time; */
2004 cap->h.object_type = type;
2005 osd_sec_set_caps(&cap->h, OSD_SEC_CAP_V1_ALL_CAPS);
2006 cap->h.object_descriptor_type = descriptor_type;
2007 cap->od.obj_desc.policy_access_tag = 0;
2008 cap->od.obj_desc.allowed_partition_id = cpu_to_be64(obj->partition);
2009 cap->od.obj_desc.allowed_object_id = cpu_to_be64(obj->id);
2010 }
2011 EXPORT_SYMBOL(osd_sec_init_nosec_doall_caps);
2012
2013 /* FIXME: Extract version from caps pointer.
2014 * Also Pete's target only supports caps from OSDv1 for now
2015 */
2016 void osd_set_caps(struct osd_cdb *cdb, const void *caps)
2017 {
2018 /* NOTE: They start at same address */
2019 memcpy(&cdb->v1.caps, caps, OSDv1_CAP_LEN);
2020 }
2021
2022 bool osd_is_sec_alldata(struct osd_security_parameters *sec_parms __unused)
2023 {
2024 return false;
2025 }
2026
2027 void osd_sec_sign_cdb(struct osd_cdb *ocdb __unused, const u8 *cap_key __unused)
2028 {
2029 }
2030
2031 void osd_sec_sign_data(void *data_integ __unused,
2032 struct bio *bio __unused, const u8 *cap_key __unused)
2033 {
2034 }
2035
2036 /*
2037 * Declared in osd_protocol.h
2038 * 4.12.5 Data-In and Data-Out buffer offsets
2039 * byte offset = mantissa * (2^(exponent+8))
2040 * Returns the smallest allowed encoded offset that contains given @offset
2041 * The actual encoded offset returned is @offset + *@padding.
2042 */
2043 osd_cdb_offset __osd_encode_offset(
2044 u64 offset, unsigned *padding, int min_shift, int max_shift)
2045 {
2046 u64 try_offset = -1, mod, align;
2047 osd_cdb_offset be32_offset;
2048 int shift;
2049
2050 *padding = 0;
2051 if (!offset)
2052 return 0;
2053
2054 for (shift = min_shift; shift < max_shift; ++shift) {
2055 try_offset = offset >> shift;
2056 if (try_offset < (1 << OSD_OFFSET_MAX_BITS))
2057 break;
2058 }
2059
2060 BUG_ON(shift == max_shift);
2061
2062 align = 1 << shift;
2063 mod = offset & (align - 1);
2064 if (mod) {
2065 *padding = align - mod;
2066 try_offset += 1;
2067 }
2068
2069 try_offset |= ((shift - 8) & 0xf) << 28;
2070 be32_offset = cpu_to_be32((u32)try_offset);
2071
2072 OSD_DEBUG("offset=%llu mantissa=%llu exp=%d encoded=%x pad=%d\n",
2073 _LLU(offset), _LLU(try_offset & 0x0FFFFFFF), shift,
2074 be32_offset, *padding);
2075 return be32_offset;
2076 }
Linux with added FPC-III support