SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 <scsi/osd_initiator.h>
  43 #include <scsi/osd_sec.h>
  44 #include <scsi/osd_attributes.h>
  45 #include <scsi/osd_sense.h>
  46
  47 #include <scsi/scsi_device.h>
  48
  49 #include "osd_debug.h"
  50
  51 #ifndef __unused
  52 #    define __unused                    __attribute__((unused))
  53 #endif
  54
  55 enum { OSD_REQ_RETRIES = 1 };
  56
  57 MODULE_AUTHOR("Boaz Harrosh <bharrosh@panasas.com>");
  58 MODULE_DESCRIPTION("open-osd initiator library libosd.ko");
  59 MODULE_LICENSE("GPL");
  60
  61 static inline void build_test(void)
  62 {
  63         /* structures were not packed */
  64         BUILD_BUG_ON(sizeof(struct osd_capability) != OSD_CAP_LEN);
  65         BUILD_BUG_ON(sizeof(struct osdv2_cdb) != OSD_TOTAL_CDB_LEN);
  66         BUILD_BUG_ON(sizeof(struct osdv1_cdb) != OSDv1_TOTAL_CDB_LEN);
  67 }
  68
  69 static const char *_osd_ver_desc(struct osd_request *or)
  70 {
  71         return osd_req_is_ver1(or) ? "OSD1" : "OSD2";
  72 }
  73
  74 #define ATTR_DEF_RI(id, len) ATTR_DEF(OSD_APAGE_ROOT_INFORMATION, id, len)
  75
  76 static int _osd_get_print_system_info(struct osd_dev *od,
  77         void *caps, struct osd_dev_info *odi)
  78 {
  79         struct osd_request *or;
  80         struct osd_attr get_attrs[] = {
  81                 ATTR_DEF_RI(OSD_ATTR_RI_VENDOR_IDENTIFICATION, 8),
  82                 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_IDENTIFICATION, 16),
  83                 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_MODEL, 32),
  84                 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_REVISION_LEVEL, 4),
  85                 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_SERIAL_NUMBER, 64 /*variable*/),
  86                 ATTR_DEF_RI(OSD_ATTR_RI_OSD_NAME, 64 /*variable*/),
  87                 ATTR_DEF_RI(OSD_ATTR_RI_TOTAL_CAPACITY, 8),
  88                 ATTR_DEF_RI(OSD_ATTR_RI_USED_CAPACITY, 8),
  89                 ATTR_DEF_RI(OSD_ATTR_RI_NUMBER_OF_PARTITIONS, 8),
  90                 ATTR_DEF_RI(OSD_ATTR_RI_CLOCK, 6),
  91                 /* IBM-OSD-SIM Has a bug with this one put it last */
  92                 ATTR_DEF_RI(OSD_ATTR_RI_OSD_SYSTEM_ID, 20),
  93         };
  94         void *iter = NULL, *pFirst;
  95         int nelem = ARRAY_SIZE(get_attrs), a = 0;
  96         int ret;
  97
  98         or = osd_start_request(od, GFP_KERNEL);
  99         if (!or)
 100                 return -ENOMEM;
 101
 102         /* get attrs */
 103         osd_req_get_attributes(or, &osd_root_object);
 104         osd_req_add_get_attr_list(or, get_attrs, ARRAY_SIZE(get_attrs));
 105
 106         ret = osd_finalize_request(or, 0, caps, NULL);
 107         if (ret)
 108                 goto out;
 109
 110         ret = osd_execute_request(or);
 111         if (ret) {
 112                 OSD_ERR("Failed to detect %s => %d\n", _osd_ver_desc(or), ret);
 113                 goto out;
 114         }
 115
 116         osd_req_decode_get_attr_list(or, get_attrs, &nelem, &iter);
 117
 118         OSD_INFO("Detected %s device\n",
 119                 _osd_ver_desc(or));
 120
 121         pFirst = get_attrs[a++].val_ptr;
 122         OSD_INFO("VENDOR_IDENTIFICATION  [%s]\n",
 123                 (char *)pFirst);
 124
 125         pFirst = get_attrs[a++].val_ptr;
 126         OSD_INFO("PRODUCT_IDENTIFICATION [%s]\n",
 127                 (char *)pFirst);
 128
 129         pFirst = get_attrs[a++].val_ptr;
 130         OSD_INFO("PRODUCT_MODEL          [%s]\n",
 131                 (char *)pFirst);
 132
 133         pFirst = get_attrs[a++].val_ptr;
 134         OSD_INFO("PRODUCT_REVISION_LEVEL [%u]\n",
 135                 pFirst ? get_unaligned_be32(pFirst) : ~0U);
 136
 137         pFirst = get_attrs[a++].val_ptr;
 138         OSD_INFO("PRODUCT_SERIAL_NUMBER  [%s]\n",
 139                 (char *)pFirst);
 140
 141         odi->osdname_len = get_attrs[a].len;
 142         /* Avoid NULL for memcmp optimization 0-length is good enough */
 143         odi->osdname = kzalloc(odi->osdname_len + 1, GFP_KERNEL);
 144         if (odi->osdname_len)
 145                 memcpy(odi->osdname, get_attrs[a].val_ptr, odi->osdname_len);
 146         OSD_INFO("OSD_NAME               [%s]\n", odi->osdname);
 147         a++;
 148
 149         pFirst = get_attrs[a++].val_ptr;
 150         OSD_INFO("TOTAL_CAPACITY         [0x%llx]\n",
 151                 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
 152
 153         pFirst = get_attrs[a++].val_ptr;
 154         OSD_INFO("USED_CAPACITY          [0x%llx]\n",
 155                 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
 156
 157         pFirst = get_attrs[a++].val_ptr;
 158         OSD_INFO("NUMBER_OF_PARTITIONS   [%llu]\n",
 159                 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
 160
 161         if (a >= nelem)
 162                 goto out;
 163
 164         /* FIXME: Where are the time utilities */
 165         pFirst = get_attrs[a++].val_ptr;
 166         OSD_INFO("CLOCK                  [0x%02x%02x%02x%02x%02x%02x]\n",
 167                 ((char *)pFirst)[0], ((char *)pFirst)[1],
 168                 ((char *)pFirst)[2], ((char *)pFirst)[3],
 169                 ((char *)pFirst)[4], ((char *)pFirst)[5]);
 170
 171         if (a < nelem) { /* IBM-OSD-SIM bug, Might not have it */
 172                 unsigned len = get_attrs[a].len;
 173                 char sid_dump[32*4 + 2]; /* 2nibbles+space+ASCII */
 174
 175                 hex_dump_to_buffer(get_attrs[a].val_ptr, len, 32, 1,
 176                                    sid_dump, sizeof(sid_dump), true);
 177                 OSD_INFO("OSD_SYSTEM_ID(%d)\n"
 178                          "        [%s]\n", len, sid_dump);
 179
 180                 if (unlikely(len > sizeof(odi->systemid))) {
 181                         OSD_ERR("OSD Target error: OSD_SYSTEM_ID too long(%d). "
 182                                 "device idetification might not work\n", len);
 183                         len = sizeof(odi->systemid);
 184                 }
 185                 odi->systemid_len = len;
 186                 memcpy(odi->systemid, get_attrs[a].val_ptr, len);
 187                 a++;
 188         }
 189 out:
 190         osd_end_request(or);
 191         return ret;
 192 }
 193
 194 int osd_auto_detect_ver(struct osd_dev *od,
 195         void *caps, struct osd_dev_info *odi)
 196 {
 197         int ret;
 198
 199         /* Auto-detect the osd version */
 200         ret = _osd_get_print_system_info(od, caps, odi);
 201         if (ret) {
 202                 osd_dev_set_ver(od, OSD_VER1);
 203                 OSD_DEBUG("converting to OSD1\n");
 204                 ret = _osd_get_print_system_info(od, caps, odi);
 205         }
 206
 207         return ret;
 208 }
 209 EXPORT_SYMBOL(osd_auto_detect_ver);
 210
 211 static unsigned _osd_req_cdb_len(struct osd_request *or)
 212 {
 213         return osd_req_is_ver1(or) ? OSDv1_TOTAL_CDB_LEN : OSD_TOTAL_CDB_LEN;
 214 }
 215
 216 static unsigned _osd_req_alist_elem_size(struct osd_request *or, unsigned len)
 217 {
 218         return osd_req_is_ver1(or) ?
 219                 osdv1_attr_list_elem_size(len) :
 220                 osdv2_attr_list_elem_size(len);
 221 }
 222
 223 static void _osd_req_alist_elem_encode(struct osd_request *or,
 224         void *attr_last, const struct osd_attr *oa)
 225 {
 226         if (osd_req_is_ver1(or)) {
 227                 struct osdv1_attributes_list_element *attr = attr_last;
 228
 229                 attr->attr_page = cpu_to_be32(oa->attr_page);
 230                 attr->attr_id = cpu_to_be32(oa->attr_id);
 231                 attr->attr_bytes = cpu_to_be16(oa->len);
 232                 memcpy(attr->attr_val, oa->val_ptr, oa->len);
 233         } else {
 234                 struct osdv2_attributes_list_element *attr = attr_last;
 235
 236                 attr->attr_page = cpu_to_be32(oa->attr_page);
 237                 attr->attr_id = cpu_to_be32(oa->attr_id);
 238                 attr->attr_bytes = cpu_to_be16(oa->len);
 239                 memcpy(attr->attr_val, oa->val_ptr, oa->len);
 240         }
 241 }
 242
 243 static int _osd_req_alist_elem_decode(struct osd_request *or,
 244         void *cur_p, struct osd_attr *oa, unsigned max_bytes)
 245 {
 246         unsigned inc;
 247         if (osd_req_is_ver1(or)) {
 248                 struct osdv1_attributes_list_element *attr = cur_p;
 249
 250                 if (max_bytes < sizeof(*attr))
 251                         return -1;
 252
 253                 oa->len = be16_to_cpu(attr->attr_bytes);
 254                 inc = _osd_req_alist_elem_size(or, oa->len);
 255                 if (inc > max_bytes)
 256                         return -1;
 257
 258                 oa->attr_page = be32_to_cpu(attr->attr_page);
 259                 oa->attr_id = be32_to_cpu(attr->attr_id);
 260
 261                 /* OSD1: On empty attributes we return a pointer to 2 bytes
 262                  * of zeros. This keeps similar behaviour with OSD2.
 263                  * (See below)
 264                  */
 265                 oa->val_ptr = likely(oa->len) ? attr->attr_val :
 266                                                 (u8 *)&attr->attr_bytes;
 267         } else {
 268                 struct osdv2_attributes_list_element *attr = cur_p;
 269
 270                 if (max_bytes < sizeof(*attr))
 271                         return -1;
 272
 273                 oa->len = be16_to_cpu(attr->attr_bytes);
 274                 inc = _osd_req_alist_elem_size(or, oa->len);
 275                 if (inc > max_bytes)
 276                         return -1;
 277
 278                 oa->attr_page = be32_to_cpu(attr->attr_page);
 279                 oa->attr_id = be32_to_cpu(attr->attr_id);
 280
 281                 /* OSD2: For convenience, on empty attributes, we return 8 bytes
 282                  * of zeros here. This keeps the same behaviour with OSD2r04,
 283                  * and is nice with null terminating ASCII fields.
 284                  * oa->val_ptr == NULL marks the end-of-list, or error.
 285                  */
 286                 oa->val_ptr = likely(oa->len) ? attr->attr_val : attr->reserved;
 287         }
 288         return inc;
 289 }
 290
 291 static unsigned _osd_req_alist_size(struct osd_request *or, void *list_head)
 292 {
 293         return osd_req_is_ver1(or) ?
 294                 osdv1_list_size(list_head) :
 295                 osdv2_list_size(list_head);
 296 }
 297
 298 static unsigned _osd_req_sizeof_alist_header(struct osd_request *or)
 299 {
 300         return osd_req_is_ver1(or) ?
 301                 sizeof(struct osdv1_attributes_list_header) :
 302                 sizeof(struct osdv2_attributes_list_header);
 303 }
 304
 305 static void _osd_req_set_alist_type(struct osd_request *or,
 306         void *list, int list_type)
 307 {
 308         if (osd_req_is_ver1(or)) {
 309                 struct osdv1_attributes_list_header *attr_list = list;
 310
 311                 memset(attr_list, 0, sizeof(*attr_list));
 312                 attr_list->type = list_type;
 313         } else {
 314                 struct osdv2_attributes_list_header *attr_list = list;
 315
 316                 memset(attr_list, 0, sizeof(*attr_list));
 317                 attr_list->type = list_type;
 318         }
 319 }
 320
 321 static bool _osd_req_is_alist_type(struct osd_request *or,
 322         void *list, int list_type)
 323 {
 324         if (!list)
 325                 return false;
 326
 327         if (osd_req_is_ver1(or)) {
 328                 struct osdv1_attributes_list_header *attr_list = list;
 329
 330                 return attr_list->type == list_type;
 331         } else {
 332                 struct osdv2_attributes_list_header *attr_list = list;
 333
 334                 return attr_list->type == list_type;
 335         }
 336 }
 337
 338 /* This is for List-objects not Attributes-Lists */
 339 static void _osd_req_encode_olist(struct osd_request *or,
 340         struct osd_obj_id_list *list)
 341 {
 342         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
 343
 344         if (osd_req_is_ver1(or)) {
 345                 cdbh->v1.list_identifier = list->list_identifier;
 346                 cdbh->v1.start_address = list->continuation_id;
 347         } else {
 348                 cdbh->v2.list_identifier = list->list_identifier;
 349                 cdbh->v2.start_address = list->continuation_id;
 350         }
 351 }
 352
 353 static osd_cdb_offset osd_req_encode_offset(struct osd_request *or,
 354         u64 offset, unsigned *padding)
 355 {
 356         return __osd_encode_offset(offset, padding,
 357                         osd_req_is_ver1(or) ?
 358                                 OSDv1_OFFSET_MIN_SHIFT : OSD_OFFSET_MIN_SHIFT,
 359                         OSD_OFFSET_MAX_SHIFT);
 360 }
 361
 362 static struct osd_security_parameters *
 363 _osd_req_sec_params(struct osd_request *or)
 364 {
 365         struct osd_cdb *ocdb = &or->cdb;
 366
 367         if (osd_req_is_ver1(or))
 368                 return (struct osd_security_parameters *)&ocdb->v1.sec_params;
 369         else
 370                 return (struct osd_security_parameters *)&ocdb->v2.sec_params;
 371 }
 372
 373 void osd_dev_init(struct osd_dev *osdd, struct scsi_device *scsi_device)
 374 {
 375         memset(osdd, 0, sizeof(*osdd));
 376         osdd->scsi_device = scsi_device;
 377         osdd->def_timeout = BLK_DEFAULT_SG_TIMEOUT;
 378 #ifdef OSD_VER1_SUPPORT
 379         osdd->version = OSD_VER2;
 380 #endif
 381         /* TODO: Allocate pools for osd_request attributes ... */
 382 }
 383 EXPORT_SYMBOL(osd_dev_init);
 384
 385 void osd_dev_fini(struct osd_dev *osdd)
 386 {
 387         /* TODO: De-allocate pools */
 388
 389         osdd->scsi_device = NULL;
 390 }
 391 EXPORT_SYMBOL(osd_dev_fini);
 392
 393 static struct osd_request *_osd_request_alloc(gfp_t gfp)
 394 {
 395         struct osd_request *or;
 396
 397         /* TODO: Use mempool with one saved request */
 398         or = kzalloc(sizeof(*or), gfp);
 399         return or;
 400 }
 401
 402 static void _osd_request_free(struct osd_request *or)
 403 {
 404         kfree(or);
 405 }
 406
 407 struct osd_request *osd_start_request(struct osd_dev *dev, gfp_t gfp)
 408 {
 409         struct osd_request *or;
 410
 411         or = _osd_request_alloc(gfp);
 412         if (!or)
 413                 return NULL;
 414
 415         or->osd_dev = dev;
 416         or->alloc_flags = gfp;
 417         or->timeout = dev->def_timeout;
 418         or->retries = OSD_REQ_RETRIES;
 419
 420         return or;
 421 }
 422 EXPORT_SYMBOL(osd_start_request);
 423
 424 static void _osd_free_seg(struct osd_request *or __unused,
 425         struct _osd_req_data_segment *seg)
 426 {
 427         if (!seg->buff || !seg->alloc_size)
 428                 return;
 429
 430         kfree(seg->buff);
 431         seg->buff = NULL;
 432         seg->alloc_size = 0;
 433 }
 434
 435 static void _put_request(struct request *rq , bool is_async)
 436 {
 437         if (is_async) {
 438                 WARN_ON(rq->bio);
 439                 __blk_put_request(rq->q, rq);
 440         } else {
 441                 /*
 442                  * If osd_finalize_request() was called but the request was not
 443                  * executed through the block layer, then we must release BIOs.
 444                  * TODO: Keep error code in or->async_error. Need to audit all
 445                  *       code paths.
 446                  */
 447                 if (unlikely(rq->bio))
 448                         blk_end_request(rq, -ENOMEM, blk_rq_bytes(rq));
 449                 else
 450                         blk_put_request(rq);
 451         }
 452 }
 453
 454 void osd_end_request(struct osd_request *or)
 455 {
 456         struct request *rq = or->request;
 457         /* IMPORTANT: make sure this agrees with osd_execute_request_async */
 458         bool is_async = (or->request->end_io_data == or);
 459
 460         _osd_free_seg(or, &or->set_attr);
 461         _osd_free_seg(or, &or->enc_get_attr);
 462         _osd_free_seg(or, &or->get_attr);
 463
 464         if (rq) {
 465                 if (rq->next_rq) {
 466                         _put_request(rq->next_rq, is_async);
 467                         rq->next_rq = NULL;
 468                 }
 469
 470                 _put_request(rq, is_async);
 471         }
 472         _osd_request_free(or);
 473 }
 474 EXPORT_SYMBOL(osd_end_request);
 475
 476 int osd_execute_request(struct osd_request *or)
 477 {
 478         return or->async_error =
 479                         blk_execute_rq(or->request->q, NULL, or->request, 0);
 480 }
 481 EXPORT_SYMBOL(osd_execute_request);
 482
 483 static void osd_request_async_done(struct request *req, int error)
 484 {
 485         struct osd_request *or = req->end_io_data;
 486
 487         or->async_error = error;
 488
 489         if (unlikely(error)) {
 490                 OSD_DEBUG("osd_request_async_done error recieved %d "
 491                           "errors 0x%x\n", error, req->errors);
 492                 if (!req->errors) /* don't miss out on this one */
 493                         req->errors = error;
 494         }
 495
 496         if (or->async_done)
 497                 or->async_done(or, or->async_private);
 498         else
 499                 osd_end_request(or);
 500 }
 501
 502 int osd_execute_request_async(struct osd_request *or,
 503         osd_req_done_fn *done, void *private)
 504 {
 505         or->request->end_io_data = or;
 506         or->async_private = private;
 507         or->async_done = done;
 508
 509         blk_execute_rq_nowait(or->request->q, NULL, or->request, 0,
 510                               osd_request_async_done);
 511         return 0;
 512 }
 513 EXPORT_SYMBOL(osd_execute_request_async);
 514
 515 u8 sg_out_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
 516 u8 sg_in_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
 517
 518 static int _osd_realloc_seg(struct osd_request *or,
 519         struct _osd_req_data_segment *seg, unsigned max_bytes)
 520 {
 521         void *buff;
 522
 523         if (seg->alloc_size >= max_bytes)
 524                 return 0;
 525
 526         buff = krealloc(seg->buff, max_bytes, or->alloc_flags);
 527         if (!buff) {
 528                 OSD_ERR("Failed to Realloc %d-bytes was-%d\n", max_bytes,
 529                         seg->alloc_size);
 530                 return -ENOMEM;
 531         }
 532
 533         memset(buff + seg->alloc_size, 0, max_bytes - seg->alloc_size);
 534         seg->buff = buff;
 535         seg->alloc_size = max_bytes;
 536         return 0;
 537 }
 538
 539 static int _alloc_set_attr_list(struct osd_request *or,
 540         const struct osd_attr *oa, unsigned nelem, unsigned add_bytes)
 541 {
 542         unsigned total_bytes = add_bytes;
 543
 544         for (; nelem; --nelem, ++oa)
 545                 total_bytes += _osd_req_alist_elem_size(or, oa->len);
 546
 547         OSD_DEBUG("total_bytes=%d\n", total_bytes);
 548         return _osd_realloc_seg(or, &or->set_attr, total_bytes);
 549 }
 550
 551 static int _alloc_get_attr_desc(struct osd_request *or, unsigned max_bytes)
 552 {
 553         OSD_DEBUG("total_bytes=%d\n", max_bytes);
 554         return _osd_realloc_seg(or, &or->enc_get_attr, max_bytes);
 555 }
 556
 557 static int _alloc_get_attr_list(struct osd_request *or)
 558 {
 559         OSD_DEBUG("total_bytes=%d\n", or->get_attr.total_bytes);
 560         return _osd_realloc_seg(or, &or->get_attr, or->get_attr.total_bytes);
 561 }
 562
 563 /*
 564  * Common to all OSD commands
 565  */
 566
 567 static void _osdv1_req_encode_common(struct osd_request *or,
 568         __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
 569 {
 570         struct osdv1_cdb *ocdb = &or->cdb.v1;
 571
 572         /*
 573          * For speed, the commands
 574          *      OSD_ACT_PERFORM_SCSI_COMMAND    , V1 0x8F7E, V2 0x8F7C
 575          *      OSD_ACT_SCSI_TASK_MANAGEMENT    , V1 0x8F7F, V2 0x8F7D
 576          * are not supported here. Should pass zero and set after the call
 577          */
 578         act &= cpu_to_be16(~0x0080); /* V1 action code */
 579
 580         OSD_DEBUG("OSDv1 execute opcode 0x%x\n", be16_to_cpu(act));
 581
 582         ocdb->h.varlen_cdb.opcode = VARIABLE_LENGTH_CMD;
 583         ocdb->h.varlen_cdb.additional_cdb_length = OSD_ADDITIONAL_CDB_LENGTH;
 584         ocdb->h.varlen_cdb.service_action = act;
 585
 586         ocdb->h.partition = cpu_to_be64(obj->partition);
 587         ocdb->h.object = cpu_to_be64(obj->id);
 588         ocdb->h.v1.length = cpu_to_be64(len);
 589         ocdb->h.v1.start_address = cpu_to_be64(offset);
 590 }
 591
 592 static void _osdv2_req_encode_common(struct osd_request *or,
 593          __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
 594 {
 595         struct osdv2_cdb *ocdb = &or->cdb.v2;
 596
 597         OSD_DEBUG("OSDv2 execute opcode 0x%x\n", be16_to_cpu(act));
 598
 599         ocdb->h.varlen_cdb.opcode = VARIABLE_LENGTH_CMD;
 600         ocdb->h.varlen_cdb.additional_cdb_length = OSD_ADDITIONAL_CDB_LENGTH;
 601         ocdb->h.varlen_cdb.service_action = act;
 602
 603         ocdb->h.partition = cpu_to_be64(obj->partition);
 604         ocdb->h.object = cpu_to_be64(obj->id);
 605         ocdb->h.v2.length = cpu_to_be64(len);
 606         ocdb->h.v2.start_address = cpu_to_be64(offset);
 607 }
 608
 609 static void _osd_req_encode_common(struct osd_request *or,
 610         __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
 611 {
 612         if (osd_req_is_ver1(or))
 613                 _osdv1_req_encode_common(or, act, obj, offset, len);
 614         else
 615                 _osdv2_req_encode_common(or, act, obj, offset, len);
 616 }
 617
 618 /*
 619  * Device commands
 620  */
 621 /*TODO: void osd_req_set_master_seed_xchg(struct osd_request *, ...); */
 622 /*TODO: void osd_req_set_master_key(struct osd_request *, ...); */
 623
 624 void osd_req_format(struct osd_request *or, u64 tot_capacity)
 625 {
 626         _osd_req_encode_common(or, OSD_ACT_FORMAT_OSD, &osd_root_object, 0,
 627                                 tot_capacity);
 628 }
 629 EXPORT_SYMBOL(osd_req_format);
 630
 631 int osd_req_list_dev_partitions(struct osd_request *or,
 632         osd_id initial_id, struct osd_obj_id_list *list, unsigned nelem)
 633 {
 634         return osd_req_list_partition_objects(or, 0, initial_id, list, nelem);
 635 }
 636 EXPORT_SYMBOL(osd_req_list_dev_partitions);
 637
 638 static void _osd_req_encode_flush(struct osd_request *or,
 639         enum osd_options_flush_scope_values op)
 640 {
 641         struct osd_cdb_head *ocdb = osd_cdb_head(&or->cdb);
 642
 643         ocdb->command_specific_options = op;
 644 }
 645
 646 void osd_req_flush_obsd(struct osd_request *or,
 647         enum osd_options_flush_scope_values op)
 648 {
 649         _osd_req_encode_common(or, OSD_ACT_FLUSH_OSD, &osd_root_object, 0, 0);
 650         _osd_req_encode_flush(or, op);
 651 }
 652 EXPORT_SYMBOL(osd_req_flush_obsd);
 653
 654 /*TODO: void osd_req_perform_scsi_command(struct osd_request *,
 655         const u8 *cdb, ...); */
 656 /*TODO: void osd_req_task_management(struct osd_request *, ...); */
 657
 658 /*
 659  * Partition commands
 660  */
 661 static void _osd_req_encode_partition(struct osd_request *or,
 662         __be16 act, osd_id partition)
 663 {
 664         struct osd_obj_id par = {
 665                 .partition = partition,
 666                 .id = 0,
 667         };
 668
 669         _osd_req_encode_common(or, act, &par, 0, 0);
 670 }
 671
 672 void osd_req_create_partition(struct osd_request *or, osd_id partition)
 673 {
 674         _osd_req_encode_partition(or, OSD_ACT_CREATE_PARTITION, partition);
 675 }
 676 EXPORT_SYMBOL(osd_req_create_partition);
 677
 678 void osd_req_remove_partition(struct osd_request *or, osd_id partition)
 679 {
 680         _osd_req_encode_partition(or, OSD_ACT_REMOVE_PARTITION, partition);
 681 }
 682 EXPORT_SYMBOL(osd_req_remove_partition);
 683
 684 /*TODO: void osd_req_set_partition_key(struct osd_request *,
 685         osd_id partition, u8 new_key_id[OSD_CRYPTO_KEYID_SIZE],
 686         u8 seed[OSD_CRYPTO_SEED_SIZE]); */
 687
 688 static int _osd_req_list_objects(struct osd_request *or,
 689         __be16 action, const struct osd_obj_id *obj, osd_id initial_id,
 690         struct osd_obj_id_list *list, unsigned nelem)
 691 {
 692         struct request_queue *q = osd_request_queue(or->osd_dev);
 693         u64 len = nelem * sizeof(osd_id) + sizeof(*list);
 694         struct bio *bio;
 695
 696         _osd_req_encode_common(or, action, obj, (u64)initial_id, len);
 697
 698         if (list->list_identifier)
 699                 _osd_req_encode_olist(or, list);
 700
 701         WARN_ON(or->in.bio);
 702         bio = bio_map_kern(q, list, len, or->alloc_flags);
 703         if (IS_ERR(bio)) {
 704                 OSD_ERR("!!! Failed to allocate list_objects BIO\n");
 705                 return PTR_ERR(bio);
 706         }
 707
 708         bio->bi_rw &= ~(1 << BIO_RW);
 709         or->in.bio = bio;
 710         or->in.total_bytes = bio->bi_size;
 711         return 0;
 712 }
 713
 714 int osd_req_list_partition_collections(struct osd_request *or,
 715         osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
 716         unsigned nelem)
 717 {
 718         struct osd_obj_id par = {
 719                 .partition = partition,
 720                 .id = 0,
 721         };
 722
 723         return osd_req_list_collection_objects(or, &par, initial_id, list,
 724                                                nelem);
 725 }
 726 EXPORT_SYMBOL(osd_req_list_partition_collections);
 727
 728 int osd_req_list_partition_objects(struct osd_request *or,
 729         osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
 730         unsigned nelem)
 731 {
 732         struct osd_obj_id par = {
 733                 .partition = partition,
 734                 .id = 0,
 735         };
 736
 737         return _osd_req_list_objects(or, OSD_ACT_LIST, &par, initial_id, list,
 738                                      nelem);
 739 }
 740 EXPORT_SYMBOL(osd_req_list_partition_objects);
 741
 742 void osd_req_flush_partition(struct osd_request *or,
 743         osd_id partition, enum osd_options_flush_scope_values op)
 744 {
 745         _osd_req_encode_partition(or, OSD_ACT_FLUSH_PARTITION, partition);
 746         _osd_req_encode_flush(or, op);
 747 }
 748 EXPORT_SYMBOL(osd_req_flush_partition);
 749
 750 /*
 751  * Collection commands
 752  */
 753 /*TODO: void osd_req_create_collection(struct osd_request *,
 754         const struct osd_obj_id *); */
 755 /*TODO: void osd_req_remove_collection(struct osd_request *,
 756         const struct osd_obj_id *); */
 757
 758 int osd_req_list_collection_objects(struct osd_request *or,
 759         const struct osd_obj_id *obj, osd_id initial_id,
 760         struct osd_obj_id_list *list, unsigned nelem)
 761 {
 762         return _osd_req_list_objects(or, OSD_ACT_LIST_COLLECTION, obj,
 763                                      initial_id, list, nelem);
 764 }
 765 EXPORT_SYMBOL(osd_req_list_collection_objects);
 766
 767 /*TODO: void query(struct osd_request *, ...); V2 */
 768
 769 void osd_req_flush_collection(struct osd_request *or,
 770         const struct osd_obj_id *obj, enum osd_options_flush_scope_values op)
 771 {
 772         _osd_req_encode_common(or, OSD_ACT_FLUSH_PARTITION, obj, 0, 0);
 773         _osd_req_encode_flush(or, op);
 774 }
 775 EXPORT_SYMBOL(osd_req_flush_collection);
 776
 777 /*TODO: void get_member_attrs(struct osd_request *, ...); V2 */
 778 /*TODO: void set_member_attrs(struct osd_request *, ...); V2 */
 779
 780 /*
 781  * Object commands
 782  */
 783 void osd_req_create_object(struct osd_request *or, struct osd_obj_id *obj)
 784 {
 785         _osd_req_encode_common(or, OSD_ACT_CREATE, obj, 0, 0);
 786 }
 787 EXPORT_SYMBOL(osd_req_create_object);
 788
 789 void osd_req_remove_object(struct osd_request *or, struct osd_obj_id *obj)
 790 {
 791         _osd_req_encode_common(or, OSD_ACT_REMOVE, obj, 0, 0);
 792 }
 793 EXPORT_SYMBOL(osd_req_remove_object);
 794
 795
 796 /*TODO: void osd_req_create_multi(struct osd_request *or,
 797         struct osd_obj_id *first, struct osd_obj_id_list *list, unsigned nelem);
 798 */
 799
 800 void osd_req_write(struct osd_request *or,
 801         const struct osd_obj_id *obj, u64 offset,
 802         struct bio *bio, u64 len)
 803 {
 804         _osd_req_encode_common(or, OSD_ACT_WRITE, obj, offset, len);
 805         WARN_ON(or->out.bio || or->out.total_bytes);
 806         WARN_ON(0 ==  bio_rw_flagged(bio, BIO_RW));
 807         or->out.bio = bio;
 808         or->out.total_bytes = len;
 809 }
 810 EXPORT_SYMBOL(osd_req_write);
 811
 812 int osd_req_write_kern(struct osd_request *or,
 813         const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
 814 {
 815         struct request_queue *req_q = osd_request_queue(or->osd_dev);
 816         struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
 817
 818         if (IS_ERR(bio))
 819                 return PTR_ERR(bio);
 820
 821         bio->bi_rw |= (1 << BIO_RW); /* FIXME: bio_set_dir() */
 822         osd_req_write(or, obj, offset, bio, len);
 823         return 0;
 824 }
 825 EXPORT_SYMBOL(osd_req_write_kern);
 826
 827 /*TODO: void osd_req_append(struct osd_request *,
 828         const struct osd_obj_id *, struct bio *data_out); */
 829 /*TODO: void osd_req_create_write(struct osd_request *,
 830         const struct osd_obj_id *, struct bio *data_out, u64 offset); */
 831 /*TODO: void osd_req_clear(struct osd_request *,
 832         const struct osd_obj_id *, u64 offset, u64 len); */
 833 /*TODO: void osd_req_punch(struct osd_request *,
 834         const struct osd_obj_id *, u64 offset, u64 len); V2 */
 835
 836 void osd_req_flush_object(struct osd_request *or,
 837         const struct osd_obj_id *obj, enum osd_options_flush_scope_values op,
 838         /*V2*/ u64 offset, /*V2*/ u64 len)
 839 {
 840         if (unlikely(osd_req_is_ver1(or) && (offset || len))) {
 841                 OSD_DEBUG("OSD Ver1 flush on specific range ignored\n");
 842                 offset = 0;
 843                 len = 0;
 844         }
 845
 846         _osd_req_encode_common(or, OSD_ACT_FLUSH, obj, offset, len);
 847         _osd_req_encode_flush(or, op);
 848 }
 849 EXPORT_SYMBOL(osd_req_flush_object);
 850
 851 void osd_req_read(struct osd_request *or,
 852         const struct osd_obj_id *obj, u64 offset,
 853         struct bio *bio, u64 len)
 854 {
 855         _osd_req_encode_common(or, OSD_ACT_READ, obj, offset, len);
 856         WARN_ON(or->in.bio || or->in.total_bytes);
 857         WARN_ON(1 == bio_rw_flagged(bio, BIO_RW));
 858         or->in.bio = bio;
 859         or->in.total_bytes = len;
 860 }
 861 EXPORT_SYMBOL(osd_req_read);
 862
 863 int osd_req_read_kern(struct osd_request *or,
 864         const struct osd_obj_id *obj, u64 offset, void* buff, u64 len)
 865 {
 866         struct request_queue *req_q = osd_request_queue(or->osd_dev);
 867         struct bio *bio = bio_map_kern(req_q, buff, len, GFP_KERNEL);
 868
 869         if (IS_ERR(bio))
 870                 return PTR_ERR(bio);
 871
 872         osd_req_read(or, obj, offset, bio, len);
 873         return 0;
 874 }
 875 EXPORT_SYMBOL(osd_req_read_kern);
 876
 877 void osd_req_get_attributes(struct osd_request *or,
 878         const struct osd_obj_id *obj)
 879 {
 880         _osd_req_encode_common(or, OSD_ACT_GET_ATTRIBUTES, obj, 0, 0);
 881 }
 882 EXPORT_SYMBOL(osd_req_get_attributes);
 883
 884 void osd_req_set_attributes(struct osd_request *or,
 885         const struct osd_obj_id *obj)
 886 {
 887         _osd_req_encode_common(or, OSD_ACT_SET_ATTRIBUTES, obj, 0, 0);
 888 }
 889 EXPORT_SYMBOL(osd_req_set_attributes);
 890
 891 /*
 892  * Attributes List-mode
 893  */
 894
 895 int osd_req_add_set_attr_list(struct osd_request *or,
 896         const struct osd_attr *oa, unsigned nelem)
 897 {
 898         unsigned total_bytes = or->set_attr.total_bytes;
 899         void *attr_last;
 900         int ret;
 901
 902         if (or->attributes_mode &&
 903             or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
 904                 WARN_ON(1);
 905                 return -EINVAL;
 906         }
 907         or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
 908
 909         if (!total_bytes) { /* first-time: allocate and put list header */
 910                 total_bytes = _osd_req_sizeof_alist_header(or);
 911                 ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
 912                 if (ret)
 913                         return ret;
 914                 _osd_req_set_alist_type(or, or->set_attr.buff,
 915                                         OSD_ATTR_LIST_SET_RETRIEVE);
 916         }
 917         attr_last = or->set_attr.buff + total_bytes;
 918
 919         for (; nelem; --nelem) {
 920                 unsigned elem_size = _osd_req_alist_elem_size(or, oa->len);
 921
 922                 total_bytes += elem_size;
 923                 if (unlikely(or->set_attr.alloc_size < total_bytes)) {
 924                         or->set_attr.total_bytes = total_bytes - elem_size;
 925                         ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
 926                         if (ret)
 927                                 return ret;
 928                         attr_last =
 929                                 or->set_attr.buff + or->set_attr.total_bytes;
 930                 }
 931
 932                 _osd_req_alist_elem_encode(or, attr_last, oa);
 933
 934                 attr_last += elem_size;
 935                 ++oa;
 936         }
 937
 938         or->set_attr.total_bytes = total_bytes;
 939         return 0;
 940 }
 941 EXPORT_SYMBOL(osd_req_add_set_attr_list);
 942
 943 static int _req_append_segment(struct osd_request *or,
 944         unsigned padding, struct _osd_req_data_segment *seg,
 945         struct _osd_req_data_segment *last_seg, struct _osd_io_info *io)
 946 {
 947         void *pad_buff;
 948         int ret;
 949
 950         if (padding) {
 951                 /* check if we can just add it to last buffer */
 952                 if (last_seg &&
 953                     (padding <= last_seg->alloc_size - last_seg->total_bytes))
 954                         pad_buff = last_seg->buff + last_seg->total_bytes;
 955                 else
 956                         pad_buff = io->pad_buff;
 957
 958                 ret = blk_rq_map_kern(io->req->q, io->req, pad_buff, padding,
 959                                        or->alloc_flags);
 960                 if (ret)
 961                         return ret;
 962                 io->total_bytes += padding;
 963         }
 964
 965         ret = blk_rq_map_kern(io->req->q, io->req, seg->buff, seg->total_bytes,
 966                                or->alloc_flags);
 967         if (ret)
 968                 return ret;
 969
 970         io->total_bytes += seg->total_bytes;
 971         OSD_DEBUG("padding=%d buff=%p total_bytes=%d\n", padding, seg->buff,
 972                   seg->total_bytes);
 973         return 0;
 974 }
 975
 976 static int _osd_req_finalize_set_attr_list(struct osd_request *or)
 977 {
 978         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
 979         unsigned padding;
 980         int ret;
 981
 982         if (!or->set_attr.total_bytes) {
 983                 cdbh->attrs_list.set_attr_offset = OSD_OFFSET_UNUSED;
 984                 return 0;
 985         }
 986
 987         cdbh->attrs_list.set_attr_bytes = cpu_to_be32(or->set_attr.total_bytes);
 988         cdbh->attrs_list.set_attr_offset =
 989                 osd_req_encode_offset(or, or->out.total_bytes, &padding);
 990
 991         ret = _req_append_segment(or, padding, &or->set_attr,
 992                                   or->out.last_seg, &or->out);
 993         if (ret)
 994                 return ret;
 995
 996         or->out.last_seg = &or->set_attr;
 997         return 0;
 998 }
 999
1000 int osd_req_add_get_attr_list(struct osd_request *or,
1001         const struct osd_attr *oa, unsigned nelem)
1002 {
1003         unsigned total_bytes = or->enc_get_attr.total_bytes;
1004         void *attr_last;
1005         int ret;
1006
1007         if (or->attributes_mode &&
1008             or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
1009                 WARN_ON(1);
1010                 return -EINVAL;
1011         }
1012         or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
1013
1014         /* first time calc data-in list header size */
1015         if (!or->get_attr.total_bytes)
1016                 or->get_attr.total_bytes = _osd_req_sizeof_alist_header(or);
1017
1018         /* calc data-out info */
1019         if (!total_bytes) { /* first-time: allocate and put list header */
1020                 unsigned max_bytes;
1021
1022                 total_bytes = _osd_req_sizeof_alist_header(or);
1023                 max_bytes = total_bytes +
1024                         nelem * sizeof(struct osd_attributes_list_attrid);
1025                 ret = _alloc_get_attr_desc(or, max_bytes);
1026                 if (ret)
1027                         return ret;
1028
1029                 _osd_req_set_alist_type(or, or->enc_get_attr.buff,
1030                                         OSD_ATTR_LIST_GET);
1031         }
1032         attr_last = or->enc_get_attr.buff + total_bytes;
1033
1034         for (; nelem; --nelem) {
1035                 struct osd_attributes_list_attrid *attrid;
1036                 const unsigned cur_size = sizeof(*attrid);
1037
1038                 total_bytes += cur_size;
1039                 if (unlikely(or->enc_get_attr.alloc_size < total_bytes)) {
1040                         or->enc_get_attr.total_bytes = total_bytes - cur_size;
1041                         ret = _alloc_get_attr_desc(or,
1042                                         total_bytes + nelem * sizeof(*attrid));
1043                         if (ret)
1044                                 return ret;
1045                         attr_last = or->enc_get_attr.buff +
1046                                 or->enc_get_attr.total_bytes;
1047                 }
1048
1049                 attrid = attr_last;
1050                 attrid->attr_page = cpu_to_be32(oa->attr_page);
1051                 attrid->attr_id = cpu_to_be32(oa->attr_id);
1052
1053                 attr_last += cur_size;
1054
1055                 /* calc data-in size */
1056                 or->get_attr.total_bytes +=
1057                         _osd_req_alist_elem_size(or, oa->len);
1058                 ++oa;
1059         }
1060
1061         or->enc_get_attr.total_bytes = total_bytes;
1062
1063         OSD_DEBUG(
1064                "get_attr.total_bytes=%u(%u) enc_get_attr.total_bytes=%u(%Zu)\n",
1065                or->get_attr.total_bytes,
1066                or->get_attr.total_bytes - _osd_req_sizeof_alist_header(or),
1067                or->enc_get_attr.total_bytes,
1068                (or->enc_get_attr.total_bytes - _osd_req_sizeof_alist_header(or))
1069                         / sizeof(struct osd_attributes_list_attrid));
1070
1071         return 0;
1072 }
1073 EXPORT_SYMBOL(osd_req_add_get_attr_list);
1074
1075 static int _osd_req_finalize_get_attr_list(struct osd_request *or)
1076 {
1077         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1078         unsigned out_padding;
1079         unsigned in_padding;
1080         int ret;
1081
1082         if (!or->enc_get_attr.total_bytes) {
1083                 cdbh->attrs_list.get_attr_desc_offset = OSD_OFFSET_UNUSED;
1084                 cdbh->attrs_list.get_attr_offset = OSD_OFFSET_UNUSED;
1085                 return 0;
1086         }
1087
1088         ret = _alloc_get_attr_list(or);
1089         if (ret)
1090                 return ret;
1091
1092         /* The out-going buffer info update */
1093         OSD_DEBUG("out-going\n");
1094         cdbh->attrs_list.get_attr_desc_bytes =
1095                 cpu_to_be32(or->enc_get_attr.total_bytes);
1096
1097         cdbh->attrs_list.get_attr_desc_offset =
1098                 osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
1099
1100         ret = _req_append_segment(or, out_padding, &or->enc_get_attr,
1101                                   or->out.last_seg, &or->out);
1102         if (ret)
1103                 return ret;
1104         or->out.last_seg = &or->enc_get_attr;
1105
1106         /* The incoming buffer info update */
1107         OSD_DEBUG("in-coming\n");
1108         cdbh->attrs_list.get_attr_alloc_length =
1109                 cpu_to_be32(or->get_attr.total_bytes);
1110
1111         cdbh->attrs_list.get_attr_offset =
1112                 osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
1113
1114         ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
1115                                   &or->in);
1116         if (ret)
1117                 return ret;
1118         or->in.last_seg = &or->get_attr;
1119
1120         return 0;
1121 }
1122
1123 int osd_req_decode_get_attr_list(struct osd_request *or,
1124         struct osd_attr *oa, int *nelem, void **iterator)
1125 {
1126         unsigned cur_bytes, returned_bytes;
1127         int n;
1128         const unsigned sizeof_attr_list = _osd_req_sizeof_alist_header(or);
1129         void *cur_p;
1130
1131         if (!_osd_req_is_alist_type(or, or->get_attr.buff,
1132                                     OSD_ATTR_LIST_SET_RETRIEVE)) {
1133                 oa->attr_page = 0;
1134                 oa->attr_id = 0;
1135                 oa->val_ptr = NULL;
1136                 oa->len = 0;
1137                 *iterator = NULL;
1138                 return 0;
1139         }
1140
1141         if (*iterator) {
1142                 BUG_ON((*iterator < or->get_attr.buff) ||
1143                      (or->get_attr.buff + or->get_attr.alloc_size < *iterator));
1144                 cur_p = *iterator;
1145                 cur_bytes = (*iterator - or->get_attr.buff) - sizeof_attr_list;
1146                 returned_bytes = or->get_attr.total_bytes;
1147         } else { /* first time decode the list header */
1148                 cur_bytes = sizeof_attr_list;
1149                 returned_bytes = _osd_req_alist_size(or, or->get_attr.buff) +
1150                                         sizeof_attr_list;
1151
1152                 cur_p = or->get_attr.buff + sizeof_attr_list;
1153
1154                 if (returned_bytes > or->get_attr.alloc_size) {
1155                         OSD_DEBUG("target report: space was not big enough! "
1156                                   "Allocate=%u Needed=%u\n",
1157                                   or->get_attr.alloc_size,
1158                                   returned_bytes + sizeof_attr_list);
1159
1160                         returned_bytes =
1161                                 or->get_attr.alloc_size - sizeof_attr_list;
1162                 }
1163                 or->get_attr.total_bytes = returned_bytes;
1164         }
1165
1166         for (n = 0; (n < *nelem) && (cur_bytes < returned_bytes); ++n) {
1167                 int inc = _osd_req_alist_elem_decode(or, cur_p, oa,
1168                                                  returned_bytes - cur_bytes);
1169
1170                 if (inc < 0) {
1171                         OSD_ERR("BAD FOOD from target. list not valid!"
1172                                 "c=%d r=%d n=%d\n",
1173                                 cur_bytes, returned_bytes, n);
1174                         oa->val_ptr = NULL;
1175                         cur_bytes = returned_bytes; /* break the caller loop */
1176                         break;
1177                 }
1178
1179                 cur_bytes += inc;
1180                 cur_p += inc;
1181                 ++oa;
1182         }
1183
1184         *iterator = (returned_bytes - cur_bytes) ? cur_p : NULL;
1185         *nelem = n;
1186         return returned_bytes - cur_bytes;
1187 }
1188 EXPORT_SYMBOL(osd_req_decode_get_attr_list);
1189
1190 /*
1191  * Attributes Page-mode
1192  */
1193
1194 int osd_req_add_get_attr_page(struct osd_request *or,
1195         u32 page_id, void *attar_page, unsigned max_page_len,
1196         const struct osd_attr *set_one_attr)
1197 {
1198         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1199
1200         if (or->attributes_mode &&
1201             or->attributes_mode != OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
1202                 WARN_ON(1);
1203                 return -EINVAL;
1204         }
1205         or->attributes_mode = OSD_CDB_GET_ATTR_PAGE_SET_ONE;
1206
1207         or->get_attr.buff = attar_page;
1208         or->get_attr.total_bytes = max_page_len;
1209
1210         or->set_attr.buff = set_one_attr->val_ptr;
1211         or->set_attr.total_bytes = set_one_attr->len;
1212
1213         cdbh->attrs_page.get_attr_page = cpu_to_be32(page_id);
1214         cdbh->attrs_page.get_attr_alloc_length = cpu_to_be32(max_page_len);
1215         /* ocdb->attrs_page.get_attr_offset; */
1216
1217         cdbh->attrs_page.set_attr_page = cpu_to_be32(set_one_attr->attr_page);
1218         cdbh->attrs_page.set_attr_id = cpu_to_be32(set_one_attr->attr_id);
1219         cdbh->attrs_page.set_attr_length = cpu_to_be32(set_one_attr->len);
1220         /* ocdb->attrs_page.set_attr_offset; */
1221         return 0;
1222 }
1223 EXPORT_SYMBOL(osd_req_add_get_attr_page);
1224
1225 static int _osd_req_finalize_attr_page(struct osd_request *or)
1226 {
1227         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1228         unsigned in_padding, out_padding;
1229         int ret;
1230
1231         /* returned page */
1232         cdbh->attrs_page.get_attr_offset =
1233                 osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
1234
1235         ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
1236                                   &or->in);
1237         if (ret)
1238                 return ret;
1239
1240         /* set one value */
1241         cdbh->attrs_page.set_attr_offset =
1242                 osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
1243
1244         ret = _req_append_segment(or, out_padding, &or->enc_get_attr, NULL,
1245                                   &or->out);
1246         return ret;
1247 }
1248
1249 static inline void osd_sec_parms_set_out_offset(bool is_v1,
1250         struct osd_security_parameters *sec_parms, osd_cdb_offset offset)
1251 {
1252         if (is_v1)
1253                 sec_parms->v1.data_out_integrity_check_offset = offset;
1254         else
1255                 sec_parms->v2.data_out_integrity_check_offset = offset;
1256 }
1257
1258 static inline void osd_sec_parms_set_in_offset(bool is_v1,
1259         struct osd_security_parameters *sec_parms, osd_cdb_offset offset)
1260 {
1261         if (is_v1)
1262                 sec_parms->v1.data_in_integrity_check_offset = offset;
1263         else
1264                 sec_parms->v2.data_in_integrity_check_offset = offset;
1265 }
1266
1267 static int _osd_req_finalize_data_integrity(struct osd_request *or,
1268         bool has_in, bool has_out, u64 out_data_bytes, const u8 *cap_key)
1269 {
1270         struct osd_security_parameters *sec_parms = _osd_req_sec_params(or);
1271         int ret;
1272
1273         if (!osd_is_sec_alldata(sec_parms))
1274                 return 0;
1275
1276         if (has_out) {
1277                 struct _osd_req_data_segment seg = {
1278                         .buff = &or->out_data_integ,
1279                         .total_bytes = sizeof(or->out_data_integ),
1280                 };
1281                 unsigned pad;
1282
1283                 or->out_data_integ.data_bytes = cpu_to_be64(out_data_bytes);
1284                 or->out_data_integ.set_attributes_bytes = cpu_to_be64(
1285                         or->set_attr.total_bytes);
1286                 or->out_data_integ.get_attributes_bytes = cpu_to_be64(
1287                         or->enc_get_attr.total_bytes);
1288
1289                 osd_sec_parms_set_out_offset(osd_req_is_ver1(or), sec_parms,
1290                         osd_req_encode_offset(or, or->out.total_bytes, &pad));
1291
1292                 ret = _req_append_segment(or, pad, &seg, or->out.last_seg,
1293                                           &or->out);
1294                 if (ret)
1295                         return ret;
1296                 or->out.last_seg = NULL;
1297
1298                 /* they are now all chained to request sign them all together */
1299                 osd_sec_sign_data(&or->out_data_integ, or->out.req->bio,
1300                                   cap_key);
1301         }
1302
1303         if (has_in) {
1304                 struct _osd_req_data_segment seg = {
1305                         .buff = &or->in_data_integ,
1306                         .total_bytes = sizeof(or->in_data_integ),
1307                 };
1308                 unsigned pad;
1309
1310                 osd_sec_parms_set_in_offset(osd_req_is_ver1(or), sec_parms,
1311                         osd_req_encode_offset(or, or->in.total_bytes, &pad));
1312
1313                 ret = _req_append_segment(or, pad, &seg, or->in.last_seg,
1314                                           &or->in);
1315                 if (ret)
1316                         return ret;
1317
1318                 or->in.last_seg = NULL;
1319         }
1320
1321         return 0;
1322 }
1323
1324 /*
1325  * osd_finalize_request and helpers
1326  */
1327 static struct request *_make_request(struct request_queue *q, bool has_write,
1328                               struct _osd_io_info *oii, gfp_t flags)
1329 {
1330         if (oii->bio)
1331                 return blk_make_request(q, oii->bio, flags);
1332         else {
1333                 struct request *req;
1334
1335                 req = blk_get_request(q, has_write ? WRITE : READ, flags);
1336                 if (unlikely(!req))
1337                         return ERR_PTR(-ENOMEM);
1338
1339                 return req;
1340         }
1341 }
1342
1343 static int _init_blk_request(struct osd_request *or,
1344         bool has_in, bool has_out)
1345 {
1346         gfp_t flags = or->alloc_flags;
1347         struct scsi_device *scsi_device = or->osd_dev->scsi_device;
1348         struct request_queue *q = scsi_device->request_queue;
1349         struct request *req;
1350         int ret;
1351
1352         req = _make_request(q, has_out, has_out ? &or->out : &or->in, flags);
1353         if (IS_ERR(req)) {
1354                 ret = PTR_ERR(req);
1355                 goto out;
1356         }
1357
1358         or->request = req;
1359         req->cmd_type = REQ_TYPE_BLOCK_PC;
1360         req->cmd_flags |= REQ_QUIET;
1361
1362         req->timeout = or->timeout;
1363         req->retries = or->retries;
1364         req->sense = or->sense;
1365         req->sense_len = 0;
1366
1367         if (has_out) {
1368                 or->out.req = req;
1369                 if (has_in) {
1370                         /* allocate bidi request */
1371                         req = _make_request(q, false, &or->in, flags);
1372                         if (IS_ERR(req)) {
1373                                 OSD_DEBUG("blk_get_request for bidi failed\n");
1374                                 ret = PTR_ERR(req);
1375                                 goto out;
1376                         }
1377                         req->cmd_type = REQ_TYPE_BLOCK_PC;
1378                         or->in.req = or->request->next_rq = req;
1379                 }
1380         } else if (has_in)
1381                 or->in.req = req;
1382
1383         ret = 0;
1384 out:
1385         OSD_DEBUG("or=%p has_in=%d has_out=%d => %d, %p\n",
1386                         or, has_in, has_out, ret, or->request);
1387         return ret;
1388 }
1389
1390 int osd_finalize_request(struct osd_request *or,
1391         u8 options, const void *cap, const u8 *cap_key)
1392 {
1393         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1394         bool has_in, has_out;
1395         u64 out_data_bytes = or->out.total_bytes;
1396         int ret;
1397
1398         if (options & OSD_REQ_FUA)
1399                 cdbh->options |= OSD_CDB_FUA;
1400
1401         if (options & OSD_REQ_DPO)
1402                 cdbh->options |= OSD_CDB_DPO;
1403
1404         if (options & OSD_REQ_BYPASS_TIMESTAMPS)
1405                 cdbh->timestamp_control = OSD_CDB_BYPASS_TIMESTAMPS;
1406
1407         osd_set_caps(&or->cdb, cap);
1408
1409         has_in = or->in.bio || or->get_attr.total_bytes;
1410         has_out = or->out.bio || or->set_attr.total_bytes ||
1411                 or->enc_get_attr.total_bytes;
1412
1413         ret = _init_blk_request(or, has_in, has_out);
1414         if (ret) {
1415                 OSD_DEBUG("_init_blk_request failed\n");
1416                 return ret;
1417         }
1418
1419         or->out.pad_buff = sg_out_pad_buffer;
1420         or->in.pad_buff = sg_in_pad_buffer;
1421
1422         if (!or->attributes_mode)
1423                 or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
1424         cdbh->command_specific_options |= or->attributes_mode;
1425         if (or->attributes_mode == OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
1426                 ret = _osd_req_finalize_attr_page(or);
1427         } else {
1428                 /* TODO: I think that for the GET_ATTR command these 2 should
1429                  * be reversed to keep them in execution order (for embeded
1430                  * targets with low memory footprint)
1431                  */
1432                 ret = _osd_req_finalize_set_attr_list(or);
1433                 if (ret) {
1434                         OSD_DEBUG("_osd_req_finalize_set_attr_list failed\n");
1435                         return ret;
1436                 }
1437
1438                 ret = _osd_req_finalize_get_attr_list(or);
1439                 if (ret) {
1440                         OSD_DEBUG("_osd_req_finalize_get_attr_list failed\n");
1441                         return ret;
1442                 }
1443         }
1444
1445         ret = _osd_req_finalize_data_integrity(or, has_in, has_out,
1446                                                out_data_bytes, cap_key);
1447         if (ret)
1448                 return ret;
1449
1450         osd_sec_sign_cdb(&or->cdb, cap_key);
1451
1452         or->request->cmd = or->cdb.buff;
1453         or->request->cmd_len = _osd_req_cdb_len(or);
1454
1455         return 0;
1456 }
1457 EXPORT_SYMBOL(osd_finalize_request);
1458
1459 static bool _is_osd_security_code(int code)
1460 {
1461         return  (code == osd_security_audit_value_frozen) ||
1462                 (code == osd_security_working_key_frozen) ||
1463                 (code == osd_nonce_not_unique) ||
1464                 (code == osd_nonce_timestamp_out_of_range) ||
1465                 (code == osd_invalid_dataout_buffer_integrity_check_value);
1466 }
1467
1468 #define OSD_SENSE_PRINT1(fmt, a...) \
1469         do { \
1470                 if (__cur_sense_need_output) \
1471                         OSD_ERR(fmt, ##a); \
1472         } while (0)
1473
1474 #define OSD_SENSE_PRINT2(fmt, a...) OSD_SENSE_PRINT1("    " fmt, ##a)
1475
1476 int osd_req_decode_sense_full(struct osd_request *or,
1477         struct osd_sense_info *osi, bool silent,
1478         struct osd_obj_id *bad_obj_list __unused, int max_obj __unused,
1479         struct osd_attr *bad_attr_list, int max_attr)
1480 {
1481         int sense_len, original_sense_len;
1482         struct osd_sense_info local_osi;
1483         struct scsi_sense_descriptor_based *ssdb;
1484         void *cur_descriptor;
1485 #if (CONFIG_SCSI_OSD_DPRINT_SENSE == 0)
1486         const bool __cur_sense_need_output = false;
1487 #else
1488         bool __cur_sense_need_output = !silent;
1489 #endif
1490         int ret;
1491
1492         if (likely(!or->request->errors)) {
1493                 osi->out_resid = 0;
1494                 osi->in_resid = 0;
1495                 return 0;
1496         }
1497
1498         osi = osi ? : &local_osi;
1499         memset(osi, 0, sizeof(*osi));
1500
1501         ssdb = or->request->sense;
1502         sense_len = or->request->sense_len;
1503         if ((sense_len < (int)sizeof(*ssdb) || !ssdb->sense_key)) {
1504                 OSD_ERR("Block-layer returned error(0x%x) but "
1505                         "sense_len(%u) || key(%d) is empty\n",
1506                         or->request->errors, sense_len, ssdb->sense_key);
1507                 goto analyze;
1508         }
1509
1510         if ((ssdb->response_code != 0x72) && (ssdb->response_code != 0x73)) {
1511                 OSD_ERR("Unrecognized scsi sense: rcode=%x length=%d\n",
1512                         ssdb->response_code, sense_len);
1513                 goto analyze;
1514         }
1515
1516         osi->key = ssdb->sense_key;
1517         osi->additional_code = be16_to_cpu(ssdb->additional_sense_code);
1518         original_sense_len = ssdb->additional_sense_length + 8;
1519
1520 #if (CONFIG_SCSI_OSD_DPRINT_SENSE == 1)
1521         if (__cur_sense_need_output)
1522                 __cur_sense_need_output = (osi->key > scsi_sk_recovered_error);
1523 #endif
1524         OSD_SENSE_PRINT1("Main Sense information key=0x%x length(%d, %d) "
1525                         "additional_code=0x%x async_error=%d errors=0x%x\n",
1526                         osi->key, original_sense_len, sense_len,
1527                         osi->additional_code, or->async_error,
1528                         or->request->errors);
1529
1530         if (original_sense_len < sense_len)
1531                 sense_len = original_sense_len;
1532
1533         cur_descriptor = ssdb->ssd;
1534         sense_len -= sizeof(*ssdb);
1535         while (sense_len > 0) {
1536                 struct scsi_sense_descriptor *ssd = cur_descriptor;
1537                 int cur_len = ssd->additional_length + 2;
1538
1539                 sense_len -= cur_len;
1540
1541                 if (sense_len < 0)
1542                         break; /* sense was truncated */
1543
1544                 switch (ssd->descriptor_type) {
1545                 case scsi_sense_information:
1546                 case scsi_sense_command_specific_information:
1547                 {
1548                         struct scsi_sense_command_specific_data_descriptor
1549                                 *sscd = cur_descriptor;
1550
1551                         osi->command_info =
1552                                 get_unaligned_be64(&sscd->information) ;
1553                         OSD_SENSE_PRINT2(
1554                                 "command_specific_information 0x%llx \n",
1555                                 _LLU(osi->command_info));
1556                         break;
1557                 }
1558                 case scsi_sense_key_specific:
1559                 {
1560                         struct scsi_sense_key_specific_data_descriptor
1561                                 *ssks = cur_descriptor;
1562
1563                         osi->sense_info = get_unaligned_be16(&ssks->value);
1564                         OSD_SENSE_PRINT2(
1565                                 "sense_key_specific_information %u"
1566                                 "sksv_cd_bpv_bp (0x%x)\n",
1567                                 osi->sense_info, ssks->sksv_cd_bpv_bp);
1568                         break;
1569                 }
1570                 case osd_sense_object_identification:
1571                 { /*FIXME: Keep first not last, Store in array*/
1572                         struct osd_sense_identification_data_descriptor
1573                                 *osidd = cur_descriptor;
1574
1575                         osi->not_initiated_command_functions =
1576                                 le32_to_cpu(osidd->not_initiated_functions);
1577                         osi->completed_command_functions =
1578                                 le32_to_cpu(osidd->completed_functions);
1579                         osi->obj.partition = be64_to_cpu(osidd->partition_id);
1580                         osi->obj.id = be64_to_cpu(osidd->object_id);
1581                         OSD_SENSE_PRINT2(
1582                                 "object_identification pid=0x%llx oid=0x%llx\n",
1583                                 _LLU(osi->obj.partition), _LLU(osi->obj.id));
1584                         OSD_SENSE_PRINT2(
1585                                 "not_initiated_bits(%x) "
1586                                 "completed_command_bits(%x)\n",
1587                                 osi->not_initiated_command_functions,
1588                                 osi->completed_command_functions);
1589                         break;
1590                 }
1591                 case osd_sense_response_integrity_check:
1592                 {
1593                         struct osd_sense_response_integrity_check_descriptor
1594                                 *osricd = cur_descriptor;
1595                         const unsigned len =
1596                                           sizeof(osricd->integrity_check_value);
1597                         char key_dump[len*4 + 2]; /* 2nibbles+space+ASCII */
1598
1599                         hex_dump_to_buffer(osricd->integrity_check_value, len,
1600                                        32, 1, key_dump, sizeof(key_dump), true);
1601                         OSD_SENSE_PRINT2("response_integrity [%s]\n", key_dump);
1602                 }
1603                 case osd_sense_attribute_identification:
1604                 {
1605                         struct osd_sense_attributes_data_descriptor
1606                                 *osadd = cur_descriptor;
1607                         unsigned len = min(cur_len, sense_len);
1608                         struct osd_sense_attr *pattr = osadd->sense_attrs;
1609
1610                         while (len >= sizeof(*pattr)) {
1611                                 u32 attr_page = be32_to_cpu(pattr->attr_page);
1612                                 u32 attr_id = be32_to_cpu(pattr->attr_id);
1613
1614                                 if (!osi->attr.attr_page) {
1615                                         osi->attr.attr_page = attr_page;
1616                                         osi->attr.attr_id = attr_id;
1617                                 }
1618
1619                                 if (bad_attr_list && max_attr) {
1620                                         bad_attr_list->attr_page = attr_page;
1621                                         bad_attr_list->attr_id = attr_id;
1622                                         bad_attr_list++;
1623                                         max_attr--;
1624                                 }
1625
1626                                 len -= sizeof(*pattr);
1627                                 OSD_SENSE_PRINT2(
1628                                         "osd_sense_attribute_identification"
1629                                         "attr_page=0x%x attr_id=0x%x\n",
1630                                         attr_page, attr_id);
1631                         }
1632                 }
1633                 /*These are not legal for OSD*/
1634                 case scsi_sense_field_replaceable_unit:
1635                         OSD_SENSE_PRINT2("scsi_sense_field_replaceable_unit\n");
1636                         break;
1637                 case scsi_sense_stream_commands:
1638                         OSD_SENSE_PRINT2("scsi_sense_stream_commands\n");
1639                         break;
1640                 case scsi_sense_block_commands:
1641                         OSD_SENSE_PRINT2("scsi_sense_block_commands\n");
1642                         break;
1643                 case scsi_sense_ata_return:
1644                         OSD_SENSE_PRINT2("scsi_sense_ata_return\n");
1645                         break;
1646                 default:
1647                         if (ssd->descriptor_type <= scsi_sense_Reserved_last)
1648                                 OSD_SENSE_PRINT2(
1649                                         "scsi_sense Reserved descriptor (0x%x)",
1650                                         ssd->descriptor_type);
1651                         else
1652                                 OSD_SENSE_PRINT2(
1653                                         "scsi_sense Vendor descriptor (0x%x)",
1654                                         ssd->descriptor_type);
1655                 }
1656
1657                 cur_descriptor += cur_len;
1658         }
1659
1660 analyze:
1661         if (!osi->key) {
1662                 /* scsi sense is Empty, the request was never issued to target
1663                  * linux return code might tell us what happened.
1664                  */
1665                 if (or->async_error == -ENOMEM)
1666                         osi->osd_err_pri = OSD_ERR_PRI_RESOURCE;
1667                 else
1668                         osi->osd_err_pri = OSD_ERR_PRI_UNREACHABLE;
1669                 ret = or->async_error;
1670         } else if (osi->key <= scsi_sk_recovered_error) {
1671                 osi->osd_err_pri = 0;
1672                 ret = 0;
1673         } else if (osi->additional_code == scsi_invalid_field_in_cdb) {
1674                 if (osi->cdb_field_offset == OSD_CFO_STARTING_BYTE) {
1675                         osi->osd_err_pri = OSD_ERR_PRI_CLEAR_PAGES;
1676                         ret = -EFAULT; /* caller should recover from this */
1677                 } else if (osi->cdb_field_offset == OSD_CFO_OBJECT_ID) {
1678                         osi->osd_err_pri = OSD_ERR_PRI_NOT_FOUND;
1679                         ret = -ENOENT;
1680                 } else if (osi->cdb_field_offset == OSD_CFO_PERMISSIONS) {
1681                         osi->osd_err_pri = OSD_ERR_PRI_NO_ACCESS;
1682                         ret = -EACCES;
1683                 } else {
1684                         osi->osd_err_pri = OSD_ERR_PRI_BAD_CRED;
1685                         ret = -EINVAL;
1686                 }
1687         } else if (osi->additional_code == osd_quota_error) {
1688                 osi->osd_err_pri = OSD_ERR_PRI_NO_SPACE;
1689                 ret = -ENOSPC;
1690         } else if (_is_osd_security_code(osi->additional_code)) {
1691                 osi->osd_err_pri = OSD_ERR_PRI_BAD_CRED;
1692                 ret = -EINVAL;
1693         } else {
1694                 osi->osd_err_pri = OSD_ERR_PRI_EIO;
1695                 ret = -EIO;
1696         }
1697
1698         if (or->out.req)
1699                 osi->out_resid = or->out.req->resid_len ?: or->out.total_bytes;
1700         if (or->in.req)
1701                 osi->in_resid = or->in.req->resid_len ?: or->in.total_bytes;
1702
1703         return ret;
1704 }
1705 EXPORT_SYMBOL(osd_req_decode_sense_full);
1706
1707 /*
1708  * Implementation of osd_sec.h API
1709  * TODO: Move to a separate osd_sec.c file at a later stage.
1710  */
1711
1712 enum { OSD_SEC_CAP_V1_ALL_CAPS =
1713         OSD_SEC_CAP_APPEND | OSD_SEC_CAP_OBJ_MGMT | OSD_SEC_CAP_REMOVE   |
1714         OSD_SEC_CAP_CREATE | OSD_SEC_CAP_SET_ATTR | OSD_SEC_CAP_GET_ATTR |
1715         OSD_SEC_CAP_WRITE  | OSD_SEC_CAP_READ     | OSD_SEC_CAP_POL_SEC  |
1716         OSD_SEC_CAP_GLOBAL | OSD_SEC_CAP_DEV_MGMT
1717 };
1718
1719 enum { OSD_SEC_CAP_V2_ALL_CAPS =
1720         OSD_SEC_CAP_V1_ALL_CAPS | OSD_SEC_CAP_QUERY | OSD_SEC_CAP_M_OBJECT
1721 };
1722
1723 void osd_sec_init_nosec_doall_caps(void *caps,
1724         const struct osd_obj_id *obj, bool is_collection, const bool is_v1)
1725 {
1726         struct osd_capability *cap = caps;
1727         u8 type;
1728         u8 descriptor_type;
1729
1730         if (likely(obj->id)) {
1731                 if (unlikely(is_collection)) {
1732                         type = OSD_SEC_OBJ_COLLECTION;
1733                         descriptor_type = is_v1 ? OSD_SEC_OBJ_DESC_OBJ :
1734                                                   OSD_SEC_OBJ_DESC_COL;
1735                 } else {
1736                         type = OSD_SEC_OBJ_USER;
1737                         descriptor_type = OSD_SEC_OBJ_DESC_OBJ;
1738                 }
1739                 WARN_ON(!obj->partition);
1740         } else {
1741                 type = obj->partition ? OSD_SEC_OBJ_PARTITION :
1742                                         OSD_SEC_OBJ_ROOT;
1743                 descriptor_type = OSD_SEC_OBJ_DESC_PAR;
1744         }
1745
1746         memset(cap, 0, sizeof(*cap));
1747
1748         cap->h.format = OSD_SEC_CAP_FORMAT_VER1;
1749         cap->h.integrity_algorithm__key_version = 0; /* MAKE_BYTE(0, 0); */
1750         cap->h.security_method = OSD_SEC_NOSEC;
1751 /*      cap->expiration_time;
1752         cap->AUDIT[30-10];
1753         cap->discriminator[42-30];
1754         cap->object_created_time; */
1755         cap->h.object_type = type;
1756         osd_sec_set_caps(&cap->h, OSD_SEC_CAP_V1_ALL_CAPS);
1757         cap->h.object_descriptor_type = descriptor_type;
1758         cap->od.obj_desc.policy_access_tag = 0;
1759         cap->od.obj_desc.allowed_partition_id = cpu_to_be64(obj->partition);
1760         cap->od.obj_desc.allowed_object_id = cpu_to_be64(obj->id);
1761 }
1762 EXPORT_SYMBOL(osd_sec_init_nosec_doall_caps);
1763
1764 /* FIXME: Extract version from caps pointer.
1765  *        Also Pete's target only supports caps from OSDv1 for now
1766  */
1767 void osd_set_caps(struct osd_cdb *cdb, const void *caps)
1768 {
1769         bool is_ver1 = true;
1770         /* NOTE: They start at same address */
1771         memcpy(&cdb->v1.caps, caps, is_ver1 ? OSDv1_CAP_LEN : OSD_CAP_LEN);
1772 }
1773
1774 bool osd_is_sec_alldata(struct osd_security_parameters *sec_parms __unused)
1775 {
1776         return false;
1777 }
1778
1779 void osd_sec_sign_cdb(struct osd_cdb *ocdb __unused, const u8 *cap_key __unused)
1780 {
1781 }
1782
1783 void osd_sec_sign_data(void *data_integ __unused,
1784                        struct bio *bio __unused, const u8 *cap_key __unused)
1785 {
1786 }
1787
1788 /*
1789  * Declared in osd_protocol.h
1790  * 4.12.5 Data-In and Data-Out buffer offsets
1791  * byte offset = mantissa * (2^(exponent+8))
1792  * Returns the smallest allowed encoded offset that contains given @offset
1793  * The actual encoded offset returned is @offset + *@padding.
1794  */
1795 osd_cdb_offset __osd_encode_offset(
1796         u64 offset, unsigned *padding, int min_shift, int max_shift)
1797 {
1798         u64 try_offset = -1, mod, align;
1799         osd_cdb_offset be32_offset;
1800         int shift;
1801
1802         *padding = 0;
1803         if (!offset)
1804                 return 0;
1805
1806         for (shift = min_shift; shift < max_shift; ++shift) {
1807                 try_offset = offset >> shift;
1808                 if (try_offset < (1 << OSD_OFFSET_MAX_BITS))
1809                         break;
1810         }
1811
1812         BUG_ON(shift == max_shift);
1813
1814         align = 1 << shift;
1815         mod = offset & (align - 1);
1816         if (mod) {
1817                 *padding = align - mod;
1818                 try_offset += 1;
1819         }
1820
1821         try_offset |= ((shift - 8) & 0xf) << 28;
1822         be32_offset = cpu_to_be32((u32)try_offset);
1823
1824         OSD_DEBUG("offset=%llu mantissa=%llu exp=%d encoded=%x pad=%d\n",
1825                  _LLU(offset), _LLU(try_offset & 0x0FFFFFFF), shift,
1826                  be32_offset, *padding);
1827         return be32_offset;
1828 }