git.oblomov.eu Git - 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_print_system_info(struct osd_dev *od, void *caps)
  77 {
  78         struct osd_request *or;
  79         struct osd_attr get_attrs[] = {
  80                 ATTR_DEF_RI(OSD_ATTR_RI_VENDOR_IDENTIFICATION, 8),
  81                 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_IDENTIFICATION, 16),
  82                 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_MODEL, 32),
  83                 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_REVISION_LEVEL, 4),
  84                 ATTR_DEF_RI(OSD_ATTR_RI_PRODUCT_SERIAL_NUMBER, 64 /*variable*/),
  85                 ATTR_DEF_RI(OSD_ATTR_RI_OSD_NAME, 64 /*variable*/),
  86                 ATTR_DEF_RI(OSD_ATTR_RI_TOTAL_CAPACITY, 8),
  87                 ATTR_DEF_RI(OSD_ATTR_RI_USED_CAPACITY, 8),
  88                 ATTR_DEF_RI(OSD_ATTR_RI_NUMBER_OF_PARTITIONS, 8),
  89                 ATTR_DEF_RI(OSD_ATTR_RI_CLOCK, 6),
  90                 /* IBM-OSD-SIM Has a bug with this one put it last */
  91                 ATTR_DEF_RI(OSD_ATTR_RI_OSD_SYSTEM_ID, 20),
  92         };
  93         void *iter = NULL, *pFirst;
  94         int nelem = ARRAY_SIZE(get_attrs), a = 0;
  95         int ret;
  96
  97         or = osd_start_request(od, GFP_KERNEL);
  98         if (!or)
  99                 return -ENOMEM;
 100
 101         /* get attrs */
 102         osd_req_get_attributes(or, &osd_root_object);
 103         osd_req_add_get_attr_list(or, get_attrs, ARRAY_SIZE(get_attrs));
 104
 105         ret = osd_finalize_request(or, 0, caps, NULL);
 106         if (ret)
 107                 goto out;
 108
 109         ret = osd_execute_request(or);
 110         if (ret) {
 111                 OSD_ERR("Failed to detect %s => %d\n", _osd_ver_desc(or), ret);
 112                 goto out;
 113         }
 114
 115         osd_req_decode_get_attr_list(or, get_attrs, &nelem, &iter);
 116
 117         OSD_INFO("Detected %s device\n",
 118                 _osd_ver_desc(or));
 119
 120         pFirst = get_attrs[a++].val_ptr;
 121         OSD_INFO("OSD_ATTR_RI_VENDOR_IDENTIFICATION [%s]\n",
 122                 (char *)pFirst);
 123
 124         pFirst = get_attrs[a++].val_ptr;
 125         OSD_INFO("OSD_ATTR_RI_PRODUCT_IDENTIFICATION [%s]\n",
 126                 (char *)pFirst);
 127
 128         pFirst = get_attrs[a++].val_ptr;
 129         OSD_INFO("OSD_ATTR_RI_PRODUCT_MODEL [%s]\n",
 130                 (char *)pFirst);
 131
 132         pFirst = get_attrs[a++].val_ptr;
 133         OSD_INFO("OSD_ATTR_RI_PRODUCT_REVISION_LEVEL [%u]\n",
 134                 pFirst ? get_unaligned_be32(pFirst) : ~0U);
 135
 136         pFirst = get_attrs[a++].val_ptr;
 137         OSD_INFO("OSD_ATTR_RI_PRODUCT_SERIAL_NUMBER [%s]\n",
 138                 (char *)pFirst);
 139
 140         pFirst = get_attrs[a].val_ptr;
 141         OSD_INFO("OSD_ATTR_RI_OSD_NAME [%s]\n", (char *)pFirst);
 142         a++;
 143
 144         pFirst = get_attrs[a++].val_ptr;
 145         OSD_INFO("OSD_ATTR_RI_TOTAL_CAPACITY [0x%llx]\n",
 146                 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
 147
 148         pFirst = get_attrs[a++].val_ptr;
 149         OSD_INFO("OSD_ATTR_RI_USED_CAPACITY [0x%llx]\n",
 150                 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
 151
 152         pFirst = get_attrs[a++].val_ptr;
 153         OSD_INFO("OSD_ATTR_RI_NUMBER_OF_PARTITIONS [%llu]\n",
 154                 pFirst ? _LLU(get_unaligned_be64(pFirst)) : ~0ULL);
 155
 156         if (a >= nelem)
 157                 goto out;
 158
 159         /* FIXME: Where are the time utilities */
 160         pFirst = get_attrs[a++].val_ptr;
 161         OSD_INFO("OSD_ATTR_RI_CLOCK [0x%02x%02x%02x%02x%02x%02x]\n",
 162                 ((char *)pFirst)[0], ((char *)pFirst)[1],
 163                 ((char *)pFirst)[2], ((char *)pFirst)[3],
 164                 ((char *)pFirst)[4], ((char *)pFirst)[5]);
 165
 166         if (a < nelem) { /* IBM-OSD-SIM bug, Might not have it */
 167                 unsigned len = get_attrs[a].len;
 168                 char sid_dump[32*4 + 2]; /* 2nibbles+space+ASCII */
 169
 170                 hex_dump_to_buffer(get_attrs[a].val_ptr, len, 32, 1,
 171                                    sid_dump, sizeof(sid_dump), true);
 172                 OSD_INFO("OSD_ATTR_RI_OSD_SYSTEM_ID(%d) [%s]\n", len, sid_dump);
 173                 a++;
 174         }
 175 out:
 176         osd_end_request(or);
 177         return ret;
 178 }
 179
 180 int osd_auto_detect_ver(struct osd_dev *od, void *caps)
 181 {
 182         int ret;
 183
 184         /* Auto-detect the osd version */
 185         ret = _osd_print_system_info(od, caps);
 186         if (ret) {
 187                 osd_dev_set_ver(od, OSD_VER1);
 188                 OSD_DEBUG("converting to OSD1\n");
 189                 ret = _osd_print_system_info(od, caps);
 190         }
 191
 192         return ret;
 193 }
 194 EXPORT_SYMBOL(osd_auto_detect_ver);
 195
 196 static unsigned _osd_req_cdb_len(struct osd_request *or)
 197 {
 198         return osd_req_is_ver1(or) ? OSDv1_TOTAL_CDB_LEN : OSD_TOTAL_CDB_LEN;
 199 }
 200
 201 static unsigned _osd_req_alist_elem_size(struct osd_request *or, unsigned len)
 202 {
 203         return osd_req_is_ver1(or) ?
 204                 osdv1_attr_list_elem_size(len) :
 205                 osdv2_attr_list_elem_size(len);
 206 }
 207
 208 static void _osd_req_alist_elem_encode(struct osd_request *or,
 209         void *attr_last, const struct osd_attr *oa)
 210 {
 211         if (osd_req_is_ver1(or)) {
 212                 struct osdv1_attributes_list_element *attr = attr_last;
 213
 214                 attr->attr_page = cpu_to_be32(oa->attr_page);
 215                 attr->attr_id = cpu_to_be32(oa->attr_id);
 216                 attr->attr_bytes = cpu_to_be16(oa->len);
 217                 memcpy(attr->attr_val, oa->val_ptr, oa->len);
 218         } else {
 219                 struct osdv2_attributes_list_element *attr = attr_last;
 220
 221                 attr->attr_page = cpu_to_be32(oa->attr_page);
 222                 attr->attr_id = cpu_to_be32(oa->attr_id);
 223                 attr->attr_bytes = cpu_to_be16(oa->len);
 224                 memcpy(attr->attr_val, oa->val_ptr, oa->len);
 225         }
 226 }
 227
 228 static int _osd_req_alist_elem_decode(struct osd_request *or,
 229         void *cur_p, struct osd_attr *oa, unsigned max_bytes)
 230 {
 231         unsigned inc;
 232         if (osd_req_is_ver1(or)) {
 233                 struct osdv1_attributes_list_element *attr = cur_p;
 234
 235                 if (max_bytes < sizeof(*attr))
 236                         return -1;
 237
 238                 oa->len = be16_to_cpu(attr->attr_bytes);
 239                 inc = _osd_req_alist_elem_size(or, oa->len);
 240                 if (inc > max_bytes)
 241                         return -1;
 242
 243                 oa->attr_page = be32_to_cpu(attr->attr_page);
 244                 oa->attr_id = be32_to_cpu(attr->attr_id);
 245
 246                 /* OSD1: On empty attributes we return a pointer to 2 bytes
 247                  * of zeros. This keeps similar behaviour with OSD2.
 248                  * (See below)
 249                  */
 250                 oa->val_ptr = likely(oa->len) ? attr->attr_val :
 251                                                 (u8 *)&attr->attr_bytes;
 252         } else {
 253                 struct osdv2_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                 /* OSD2: For convenience, on empty attributes, we return 8 bytes
 267                  * of zeros here. This keeps the same behaviour with OSD2r04,
 268                  * and is nice with null terminating ASCII fields.
 269                  * oa->val_ptr == NULL marks the end-of-list, or error.
 270                  */
 271                 oa->val_ptr = likely(oa->len) ? attr->attr_val : attr->reserved;
 272         }
 273         return inc;
 274 }
 275
 276 static unsigned _osd_req_alist_size(struct osd_request *or, void *list_head)
 277 {
 278         return osd_req_is_ver1(or) ?
 279                 osdv1_list_size(list_head) :
 280                 osdv2_list_size(list_head);
 281 }
 282
 283 static unsigned _osd_req_sizeof_alist_header(struct osd_request *or)
 284 {
 285         return osd_req_is_ver1(or) ?
 286                 sizeof(struct osdv1_attributes_list_header) :
 287                 sizeof(struct osdv2_attributes_list_header);
 288 }
 289
 290 static void _osd_req_set_alist_type(struct osd_request *or,
 291         void *list, int list_type)
 292 {
 293         if (osd_req_is_ver1(or)) {
 294                 struct osdv1_attributes_list_header *attr_list = list;
 295
 296                 memset(attr_list, 0, sizeof(*attr_list));
 297                 attr_list->type = list_type;
 298         } else {
 299                 struct osdv2_attributes_list_header *attr_list = list;
 300
 301                 memset(attr_list, 0, sizeof(*attr_list));
 302                 attr_list->type = list_type;
 303         }
 304 }
 305
 306 static bool _osd_req_is_alist_type(struct osd_request *or,
 307         void *list, int list_type)
 308 {
 309         if (!list)
 310                 return false;
 311
 312         if (osd_req_is_ver1(or)) {
 313                 struct osdv1_attributes_list_header *attr_list = list;
 314
 315                 return attr_list->type == list_type;
 316         } else {
 317                 struct osdv2_attributes_list_header *attr_list = list;
 318
 319                 return attr_list->type == list_type;
 320         }
 321 }
 322
 323 /* This is for List-objects not Attributes-Lists */
 324 static void _osd_req_encode_olist(struct osd_request *or,
 325         struct osd_obj_id_list *list)
 326 {
 327         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
 328
 329         if (osd_req_is_ver1(or)) {
 330                 cdbh->v1.list_identifier = list->list_identifier;
 331                 cdbh->v1.start_address = list->continuation_id;
 332         } else {
 333                 cdbh->v2.list_identifier = list->list_identifier;
 334                 cdbh->v2.start_address = list->continuation_id;
 335         }
 336 }
 337
 338 static osd_cdb_offset osd_req_encode_offset(struct osd_request *or,
 339         u64 offset, unsigned *padding)
 340 {
 341         return __osd_encode_offset(offset, padding,
 342                         osd_req_is_ver1(or) ?
 343                                 OSDv1_OFFSET_MIN_SHIFT : OSD_OFFSET_MIN_SHIFT,
 344                         OSD_OFFSET_MAX_SHIFT);
 345 }
 346
 347 static struct osd_security_parameters *
 348 _osd_req_sec_params(struct osd_request *or)
 349 {
 350         struct osd_cdb *ocdb = &or->cdb;
 351
 352         if (osd_req_is_ver1(or))
 353                 return (struct osd_security_parameters *)&ocdb->v1.sec_params;
 354         else
 355                 return (struct osd_security_parameters *)&ocdb->v2.sec_params;
 356 }
 357
 358 void osd_dev_init(struct osd_dev *osdd, struct scsi_device *scsi_device)
 359 {
 360         memset(osdd, 0, sizeof(*osdd));
 361         osdd->scsi_device = scsi_device;
 362         osdd->def_timeout = BLK_DEFAULT_SG_TIMEOUT;
 363 #ifdef OSD_VER1_SUPPORT
 364         osdd->version = OSD_VER2;
 365 #endif
 366         /* TODO: Allocate pools for osd_request attributes ... */
 367 }
 368 EXPORT_SYMBOL(osd_dev_init);
 369
 370 void osd_dev_fini(struct osd_dev *osdd)
 371 {
 372         /* TODO: De-allocate pools */
 373
 374         osdd->scsi_device = NULL;
 375 }
 376 EXPORT_SYMBOL(osd_dev_fini);
 377
 378 static struct osd_request *_osd_request_alloc(gfp_t gfp)
 379 {
 380         struct osd_request *or;
 381
 382         /* TODO: Use mempool with one saved request */
 383         or = kzalloc(sizeof(*or), gfp);
 384         return or;
 385 }
 386
 387 static void _osd_request_free(struct osd_request *or)
 388 {
 389         kfree(or);
 390 }
 391
 392 struct osd_request *osd_start_request(struct osd_dev *dev, gfp_t gfp)
 393 {
 394         struct osd_request *or;
 395
 396         or = _osd_request_alloc(gfp);
 397         if (!or)
 398                 return NULL;
 399
 400         or->osd_dev = dev;
 401         or->alloc_flags = gfp;
 402         or->timeout = dev->def_timeout;
 403         or->retries = OSD_REQ_RETRIES;
 404
 405         return or;
 406 }
 407 EXPORT_SYMBOL(osd_start_request);
 408
 409 static void _osd_free_seg(struct osd_request *or __unused,
 410         struct _osd_req_data_segment *seg)
 411 {
 412         if (!seg->buff || !seg->alloc_size)
 413                 return;
 414
 415         kfree(seg->buff);
 416         seg->buff = NULL;
 417         seg->alloc_size = 0;
 418 }
 419
 420 static void _put_request(struct request *rq , bool is_async)
 421 {
 422         if (is_async) {
 423                 WARN_ON(rq->bio);
 424                 __blk_put_request(rq->q, rq);
 425         } else {
 426                 /*
 427                  * If osd_finalize_request() was called but the request was not
 428                  * executed through the block layer, then we must release BIOs.
 429                  * TODO: Keep error code in or->async_error. Need to audit all
 430                  *       code paths.
 431                  */
 432                 if (unlikely(rq->bio))
 433                         blk_end_request(rq, -ENOMEM, blk_rq_bytes(rq));
 434                 else
 435                         blk_put_request(rq);
 436         }
 437 }
 438
 439 void osd_end_request(struct osd_request *or)
 440 {
 441         struct request *rq = or->request;
 442         /* IMPORTANT: make sure this agrees with osd_execute_request_async */
 443         bool is_async = (or->request->end_io_data == or);
 444
 445         _osd_free_seg(or, &or->set_attr);
 446         _osd_free_seg(or, &or->enc_get_attr);
 447         _osd_free_seg(or, &or->get_attr);
 448
 449         if (rq) {
 450                 if (rq->next_rq) {
 451                         _put_request(rq->next_rq, is_async);
 452                         rq->next_rq = NULL;
 453                 }
 454
 455                 _put_request(rq, is_async);
 456         }
 457         _osd_request_free(or);
 458 }
 459 EXPORT_SYMBOL(osd_end_request);
 460
 461 int osd_execute_request(struct osd_request *or)
 462 {
 463         return blk_execute_rq(or->request->q, NULL, or->request, 0);
 464 }
 465 EXPORT_SYMBOL(osd_execute_request);
 466
 467 static void osd_request_async_done(struct request *req, int error)
 468 {
 469         struct osd_request *or = req->end_io_data;
 470
 471         or->async_error = error;
 472
 473         if (error)
 474                 OSD_DEBUG("osd_request_async_done error recieved %d\n", error);
 475
 476         if (or->async_done)
 477                 or->async_done(or, or->async_private);
 478         else
 479                 osd_end_request(or);
 480 }
 481
 482 int osd_execute_request_async(struct osd_request *or,
 483         osd_req_done_fn *done, void *private)
 484 {
 485         or->request->end_io_data = or;
 486         or->async_private = private;
 487         or->async_done = done;
 488
 489         blk_execute_rq_nowait(or->request->q, NULL, or->request, 0,
 490                               osd_request_async_done);
 491         return 0;
 492 }
 493 EXPORT_SYMBOL(osd_execute_request_async);
 494
 495 u8 sg_out_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
 496 u8 sg_in_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
 497
 498 static int _osd_realloc_seg(struct osd_request *or,
 499         struct _osd_req_data_segment *seg, unsigned max_bytes)
 500 {
 501         void *buff;
 502
 503         if (seg->alloc_size >= max_bytes)
 504                 return 0;
 505
 506         buff = krealloc(seg->buff, max_bytes, or->alloc_flags);
 507         if (!buff) {
 508                 OSD_ERR("Failed to Realloc %d-bytes was-%d\n", max_bytes,
 509                         seg->alloc_size);
 510                 return -ENOMEM;
 511         }
 512
 513         memset(buff + seg->alloc_size, 0, max_bytes - seg->alloc_size);
 514         seg->buff = buff;
 515         seg->alloc_size = max_bytes;
 516         return 0;
 517 }
 518
 519 static int _alloc_set_attr_list(struct osd_request *or,
 520         const struct osd_attr *oa, unsigned nelem, unsigned add_bytes)
 521 {
 522         unsigned total_bytes = add_bytes;
 523
 524         for (; nelem; --nelem, ++oa)
 525                 total_bytes += _osd_req_alist_elem_size(or, oa->len);
 526
 527         OSD_DEBUG("total_bytes=%d\n", total_bytes);
 528         return _osd_realloc_seg(or, &or->set_attr, total_bytes);
 529 }
 530
 531 static int _alloc_get_attr_desc(struct osd_request *or, unsigned max_bytes)
 532 {
 533         OSD_DEBUG("total_bytes=%d\n", max_bytes);
 534         return _osd_realloc_seg(or, &or->enc_get_attr, max_bytes);
 535 }
 536
 537 static int _alloc_get_attr_list(struct osd_request *or)
 538 {
 539         OSD_DEBUG("total_bytes=%d\n", or->get_attr.total_bytes);
 540         return _osd_realloc_seg(or, &or->get_attr, or->get_attr.total_bytes);
 541 }
 542
 543 /*
 544  * Common to all OSD commands
 545  */
 546
 547 static void _osdv1_req_encode_common(struct osd_request *or,
 548         __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
 549 {
 550         struct osdv1_cdb *ocdb = &or->cdb.v1;
 551
 552         /*
 553          * For speed, the commands
 554          *      OSD_ACT_PERFORM_SCSI_COMMAND    , V1 0x8F7E, V2 0x8F7C
 555          *      OSD_ACT_SCSI_TASK_MANAGEMENT    , V1 0x8F7F, V2 0x8F7D
 556          * are not supported here. Should pass zero and set after the call
 557          */
 558         act &= cpu_to_be16(~0x0080); /* V1 action code */
 559
 560         OSD_DEBUG("OSDv1 execute opcode 0x%x\n", be16_to_cpu(act));
 561
 562         ocdb->h.varlen_cdb.opcode = VARIABLE_LENGTH_CMD;
 563         ocdb->h.varlen_cdb.additional_cdb_length = OSD_ADDITIONAL_CDB_LENGTH;
 564         ocdb->h.varlen_cdb.service_action = act;
 565
 566         ocdb->h.partition = cpu_to_be64(obj->partition);
 567         ocdb->h.object = cpu_to_be64(obj->id);
 568         ocdb->h.v1.length = cpu_to_be64(len);
 569         ocdb->h.v1.start_address = cpu_to_be64(offset);
 570 }
 571
 572 static void _osdv2_req_encode_common(struct osd_request *or,
 573          __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
 574 {
 575         struct osdv2_cdb *ocdb = &or->cdb.v2;
 576
 577         OSD_DEBUG("OSDv2 execute opcode 0x%x\n", be16_to_cpu(act));
 578
 579         ocdb->h.varlen_cdb.opcode = VARIABLE_LENGTH_CMD;
 580         ocdb->h.varlen_cdb.additional_cdb_length = OSD_ADDITIONAL_CDB_LENGTH;
 581         ocdb->h.varlen_cdb.service_action = act;
 582
 583         ocdb->h.partition = cpu_to_be64(obj->partition);
 584         ocdb->h.object = cpu_to_be64(obj->id);
 585         ocdb->h.v2.length = cpu_to_be64(len);
 586         ocdb->h.v2.start_address = cpu_to_be64(offset);
 587 }
 588
 589 static void _osd_req_encode_common(struct osd_request *or,
 590         __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
 591 {
 592         if (osd_req_is_ver1(or))
 593                 _osdv1_req_encode_common(or, act, obj, offset, len);
 594         else
 595                 _osdv2_req_encode_common(or, act, obj, offset, len);
 596 }
 597
 598 /*
 599  * Device commands
 600  */
 601 /*TODO: void osd_req_set_master_seed_xchg(struct osd_request *, ...); */
 602 /*TODO: void osd_req_set_master_key(struct osd_request *, ...); */
 603
 604 void osd_req_format(struct osd_request *or, u64 tot_capacity)
 605 {
 606         _osd_req_encode_common(or, OSD_ACT_FORMAT_OSD, &osd_root_object, 0,
 607                                 tot_capacity);
 608 }
 609 EXPORT_SYMBOL(osd_req_format);
 610
 611 int osd_req_list_dev_partitions(struct osd_request *or,
 612         osd_id initial_id, struct osd_obj_id_list *list, unsigned nelem)
 613 {
 614         return osd_req_list_partition_objects(or, 0, initial_id, list, nelem);
 615 }
 616 EXPORT_SYMBOL(osd_req_list_dev_partitions);
 617
 618 static void _osd_req_encode_flush(struct osd_request *or,
 619         enum osd_options_flush_scope_values op)
 620 {
 621         struct osd_cdb_head *ocdb = osd_cdb_head(&or->cdb);
 622
 623         ocdb->command_specific_options = op;
 624 }
 625
 626 void osd_req_flush_obsd(struct osd_request *or,
 627         enum osd_options_flush_scope_values op)
 628 {
 629         _osd_req_encode_common(or, OSD_ACT_FLUSH_OSD, &osd_root_object, 0, 0);
 630         _osd_req_encode_flush(or, op);
 631 }
 632 EXPORT_SYMBOL(osd_req_flush_obsd);
 633
 634 /*TODO: void osd_req_perform_scsi_command(struct osd_request *,
 635         const u8 *cdb, ...); */
 636 /*TODO: void osd_req_task_management(struct osd_request *, ...); */
 637
 638 /*
 639  * Partition commands
 640  */
 641 static void _osd_req_encode_partition(struct osd_request *or,
 642         __be16 act, osd_id partition)
 643 {
 644         struct osd_obj_id par = {
 645                 .partition = partition,
 646                 .id = 0,
 647         };
 648
 649         _osd_req_encode_common(or, act, &par, 0, 0);
 650 }
 651
 652 void osd_req_create_partition(struct osd_request *or, osd_id partition)
 653 {
 654         _osd_req_encode_partition(or, OSD_ACT_CREATE_PARTITION, partition);
 655 }
 656 EXPORT_SYMBOL(osd_req_create_partition);
 657
 658 void osd_req_remove_partition(struct osd_request *or, osd_id partition)
 659 {
 660         _osd_req_encode_partition(or, OSD_ACT_REMOVE_PARTITION, partition);
 661 }
 662 EXPORT_SYMBOL(osd_req_remove_partition);
 663
 664 /*TODO: void osd_req_set_partition_key(struct osd_request *,
 665         osd_id partition, u8 new_key_id[OSD_CRYPTO_KEYID_SIZE],
 666         u8 seed[OSD_CRYPTO_SEED_SIZE]); */
 667
 668 static int _osd_req_list_objects(struct osd_request *or,
 669         __be16 action, const struct osd_obj_id *obj, osd_id initial_id,
 670         struct osd_obj_id_list *list, unsigned nelem)
 671 {
 672         struct request_queue *q = or->osd_dev->scsi_device->request_queue;
 673         u64 len = nelem * sizeof(osd_id) + sizeof(*list);
 674         struct bio *bio;
 675
 676         _osd_req_encode_common(or, action, obj, (u64)initial_id, len);
 677
 678         if (list->list_identifier)
 679                 _osd_req_encode_olist(or, list);
 680
 681         WARN_ON(or->in.bio);
 682         bio = bio_map_kern(q, list, len, or->alloc_flags);
 683         if (IS_ERR(bio)) {
 684                 OSD_ERR("!!! Failed to allocate list_objects BIO\n");
 685                 return PTR_ERR(bio);
 686         }
 687
 688         bio->bi_rw &= ~(1 << BIO_RW);
 689         or->in.bio = bio;
 690         or->in.total_bytes = bio->bi_size;
 691         return 0;
 692 }
 693
 694 int osd_req_list_partition_collections(struct osd_request *or,
 695         osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
 696         unsigned nelem)
 697 {
 698         struct osd_obj_id par = {
 699                 .partition = partition,
 700                 .id = 0,
 701         };
 702
 703         return osd_req_list_collection_objects(or, &par, initial_id, list,
 704                                                nelem);
 705 }
 706 EXPORT_SYMBOL(osd_req_list_partition_collections);
 707
 708 int osd_req_list_partition_objects(struct osd_request *or,
 709         osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
 710         unsigned nelem)
 711 {
 712         struct osd_obj_id par = {
 713                 .partition = partition,
 714                 .id = 0,
 715         };
 716
 717         return _osd_req_list_objects(or, OSD_ACT_LIST, &par, initial_id, list,
 718                                      nelem);
 719 }
 720 EXPORT_SYMBOL(osd_req_list_partition_objects);
 721
 722 void osd_req_flush_partition(struct osd_request *or,
 723         osd_id partition, enum osd_options_flush_scope_values op)
 724 {
 725         _osd_req_encode_partition(or, OSD_ACT_FLUSH_PARTITION, partition);
 726         _osd_req_encode_flush(or, op);
 727 }
 728 EXPORT_SYMBOL(osd_req_flush_partition);
 729
 730 /*
 731  * Collection commands
 732  */
 733 /*TODO: void osd_req_create_collection(struct osd_request *,
 734         const struct osd_obj_id *); */
 735 /*TODO: void osd_req_remove_collection(struct osd_request *,
 736         const struct osd_obj_id *); */
 737
 738 int osd_req_list_collection_objects(struct osd_request *or,
 739         const struct osd_obj_id *obj, osd_id initial_id,
 740         struct osd_obj_id_list *list, unsigned nelem)
 741 {
 742         return _osd_req_list_objects(or, OSD_ACT_LIST_COLLECTION, obj,
 743                                      initial_id, list, nelem);
 744 }
 745 EXPORT_SYMBOL(osd_req_list_collection_objects);
 746
 747 /*TODO: void query(struct osd_request *, ...); V2 */
 748
 749 void osd_req_flush_collection(struct osd_request *or,
 750         const struct osd_obj_id *obj, enum osd_options_flush_scope_values op)
 751 {
 752         _osd_req_encode_common(or, OSD_ACT_FLUSH_PARTITION, obj, 0, 0);
 753         _osd_req_encode_flush(or, op);
 754 }
 755 EXPORT_SYMBOL(osd_req_flush_collection);
 756
 757 /*TODO: void get_member_attrs(struct osd_request *, ...); V2 */
 758 /*TODO: void set_member_attrs(struct osd_request *, ...); V2 */
 759
 760 /*
 761  * Object commands
 762  */
 763 void osd_req_create_object(struct osd_request *or, struct osd_obj_id *obj)
 764 {
 765         _osd_req_encode_common(or, OSD_ACT_CREATE, obj, 0, 0);
 766 }
 767 EXPORT_SYMBOL(osd_req_create_object);
 768
 769 void osd_req_remove_object(struct osd_request *or, struct osd_obj_id *obj)
 770 {
 771         _osd_req_encode_common(or, OSD_ACT_REMOVE, obj, 0, 0);
 772 }
 773 EXPORT_SYMBOL(osd_req_remove_object);
 774
 775
 776 /*TODO: void osd_req_create_multi(struct osd_request *or,
 777         struct osd_obj_id *first, struct osd_obj_id_list *list, unsigned nelem);
 778 */
 779
 780 void osd_req_write(struct osd_request *or,
 781         const struct osd_obj_id *obj, struct bio *bio, u64 offset)
 782 {
 783         _osd_req_encode_common(or, OSD_ACT_WRITE, obj, offset, bio->bi_size);
 784         WARN_ON(or->out.bio || or->out.total_bytes);
 785         bio->bi_rw |= (1 << BIO_RW);
 786         or->out.bio = bio;
 787         or->out.total_bytes = bio->bi_size;
 788 }
 789 EXPORT_SYMBOL(osd_req_write);
 790
 791 /*TODO: void osd_req_append(struct osd_request *,
 792         const struct osd_obj_id *, struct bio *data_out); */
 793 /*TODO: void osd_req_create_write(struct osd_request *,
 794         const struct osd_obj_id *, struct bio *data_out, u64 offset); */
 795 /*TODO: void osd_req_clear(struct osd_request *,
 796         const struct osd_obj_id *, u64 offset, u64 len); */
 797 /*TODO: void osd_req_punch(struct osd_request *,
 798         const struct osd_obj_id *, u64 offset, u64 len); V2 */
 799
 800 void osd_req_flush_object(struct osd_request *or,
 801         const struct osd_obj_id *obj, enum osd_options_flush_scope_values op,
 802         /*V2*/ u64 offset, /*V2*/ u64 len)
 803 {
 804         if (unlikely(osd_req_is_ver1(or) && (offset || len))) {
 805                 OSD_DEBUG("OSD Ver1 flush on specific range ignored\n");
 806                 offset = 0;
 807                 len = 0;
 808         }
 809
 810         _osd_req_encode_common(or, OSD_ACT_FLUSH, obj, offset, len);
 811         _osd_req_encode_flush(or, op);
 812 }
 813 EXPORT_SYMBOL(osd_req_flush_object);
 814
 815 void osd_req_read(struct osd_request *or,
 816         const struct osd_obj_id *obj, struct bio *bio, u64 offset)
 817 {
 818         _osd_req_encode_common(or, OSD_ACT_READ, obj, offset, bio->bi_size);
 819         WARN_ON(or->in.bio || or->in.total_bytes);
 820         bio->bi_rw &= ~(1 << BIO_RW);
 821         or->in.bio = bio;
 822         or->in.total_bytes = bio->bi_size;
 823 }
 824 EXPORT_SYMBOL(osd_req_read);
 825
 826 void osd_req_get_attributes(struct osd_request *or,
 827         const struct osd_obj_id *obj)
 828 {
 829         _osd_req_encode_common(or, OSD_ACT_GET_ATTRIBUTES, obj, 0, 0);
 830 }
 831 EXPORT_SYMBOL(osd_req_get_attributes);
 832
 833 void osd_req_set_attributes(struct osd_request *or,
 834         const struct osd_obj_id *obj)
 835 {
 836         _osd_req_encode_common(or, OSD_ACT_SET_ATTRIBUTES, obj, 0, 0);
 837 }
 838 EXPORT_SYMBOL(osd_req_set_attributes);
 839
 840 /*
 841  * Attributes List-mode
 842  */
 843
 844 int osd_req_add_set_attr_list(struct osd_request *or,
 845         const struct osd_attr *oa, unsigned nelem)
 846 {
 847         unsigned total_bytes = or->set_attr.total_bytes;
 848         void *attr_last;
 849         int ret;
 850
 851         if (or->attributes_mode &&
 852             or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
 853                 WARN_ON(1);
 854                 return -EINVAL;
 855         }
 856         or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
 857
 858         if (!total_bytes) { /* first-time: allocate and put list header */
 859                 total_bytes = _osd_req_sizeof_alist_header(or);
 860                 ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
 861                 if (ret)
 862                         return ret;
 863                 _osd_req_set_alist_type(or, or->set_attr.buff,
 864                                         OSD_ATTR_LIST_SET_RETRIEVE);
 865         }
 866         attr_last = or->set_attr.buff + total_bytes;
 867
 868         for (; nelem; --nelem) {
 869                 unsigned elem_size = _osd_req_alist_elem_size(or, oa->len);
 870
 871                 total_bytes += elem_size;
 872                 if (unlikely(or->set_attr.alloc_size < total_bytes)) {
 873                         or->set_attr.total_bytes = total_bytes - elem_size;
 874                         ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
 875                         if (ret)
 876                                 return ret;
 877                         attr_last =
 878                                 or->set_attr.buff + or->set_attr.total_bytes;
 879                 }
 880
 881                 _osd_req_alist_elem_encode(or, attr_last, oa);
 882
 883                 attr_last += elem_size;
 884                 ++oa;
 885         }
 886
 887         or->set_attr.total_bytes = total_bytes;
 888         return 0;
 889 }
 890 EXPORT_SYMBOL(osd_req_add_set_attr_list);
 891
 892 static int _append_map_kern(struct request *req,
 893         void *buff, unsigned len, gfp_t flags)
 894 {
 895         struct bio *bio;
 896         int ret;
 897
 898         bio = bio_map_kern(req->q, buff, len, flags);
 899         if (IS_ERR(bio)) {
 900                 OSD_ERR("Failed bio_map_kern(%p, %d) => %ld\n", buff, len,
 901                         PTR_ERR(bio));
 902                 return PTR_ERR(bio);
 903         }
 904         ret = blk_rq_append_bio(req->q, req, bio);
 905         if (ret) {
 906                 OSD_ERR("Failed blk_rq_append_bio(%p) => %d\n", bio, ret);
 907                 bio_put(bio);
 908         }
 909         return ret;
 910 }
 911
 912 static int _req_append_segment(struct osd_request *or,
 913         unsigned padding, struct _osd_req_data_segment *seg,
 914         struct _osd_req_data_segment *last_seg, struct _osd_io_info *io)
 915 {
 916         void *pad_buff;
 917         int ret;
 918
 919         if (padding) {
 920                 /* check if we can just add it to last buffer */
 921                 if (last_seg &&
 922                     (padding <= last_seg->alloc_size - last_seg->total_bytes))
 923                         pad_buff = last_seg->buff + last_seg->total_bytes;
 924                 else
 925                         pad_buff = io->pad_buff;
 926
 927                 ret = _append_map_kern(io->req, pad_buff, padding,
 928                                        or->alloc_flags);
 929                 if (ret)
 930                         return ret;
 931                 io->total_bytes += padding;
 932         }
 933
 934         ret = _append_map_kern(io->req, seg->buff, seg->total_bytes,
 935                                or->alloc_flags);
 936         if (ret)
 937                 return ret;
 938
 939         io->total_bytes += seg->total_bytes;
 940         OSD_DEBUG("padding=%d buff=%p total_bytes=%d\n", padding, seg->buff,
 941                   seg->total_bytes);
 942         return 0;
 943 }
 944
 945 static int _osd_req_finalize_set_attr_list(struct osd_request *or)
 946 {
 947         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
 948         unsigned padding;
 949         int ret;
 950
 951         if (!or->set_attr.total_bytes) {
 952                 cdbh->attrs_list.set_attr_offset = OSD_OFFSET_UNUSED;
 953                 return 0;
 954         }
 955
 956         cdbh->attrs_list.set_attr_bytes = cpu_to_be32(or->set_attr.total_bytes);
 957         cdbh->attrs_list.set_attr_offset =
 958                 osd_req_encode_offset(or, or->out.total_bytes, &padding);
 959
 960         ret = _req_append_segment(or, padding, &or->set_attr,
 961                                   or->out.last_seg, &or->out);
 962         if (ret)
 963                 return ret;
 964
 965         or->out.last_seg = &or->set_attr;
 966         return 0;
 967 }
 968
 969 int osd_req_add_get_attr_list(struct osd_request *or,
 970         const struct osd_attr *oa, unsigned nelem)
 971 {
 972         unsigned total_bytes = or->enc_get_attr.total_bytes;
 973         void *attr_last;
 974         int ret;
 975
 976         if (or->attributes_mode &&
 977             or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
 978                 WARN_ON(1);
 979                 return -EINVAL;
 980         }
 981         or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
 982
 983         /* first time calc data-in list header size */
 984         if (!or->get_attr.total_bytes)
 985                 or->get_attr.total_bytes = _osd_req_sizeof_alist_header(or);
 986
 987         /* calc data-out info */
 988         if (!total_bytes) { /* first-time: allocate and put list header */
 989                 unsigned max_bytes;
 990
 991                 total_bytes = _osd_req_sizeof_alist_header(or);
 992                 max_bytes = total_bytes +
 993                         nelem * sizeof(struct osd_attributes_list_attrid);
 994                 ret = _alloc_get_attr_desc(or, max_bytes);
 995                 if (ret)
 996                         return ret;
 997
 998                 _osd_req_set_alist_type(or, or->enc_get_attr.buff,
 999                                         OSD_ATTR_LIST_GET);
1000         }
1001         attr_last = or->enc_get_attr.buff + total_bytes;
1002
1003         for (; nelem; --nelem) {
1004                 struct osd_attributes_list_attrid *attrid;
1005                 const unsigned cur_size = sizeof(*attrid);
1006
1007                 total_bytes += cur_size;
1008                 if (unlikely(or->enc_get_attr.alloc_size < total_bytes)) {
1009                         or->enc_get_attr.total_bytes = total_bytes - cur_size;
1010                         ret = _alloc_get_attr_desc(or,
1011                                         total_bytes + nelem * sizeof(*attrid));
1012                         if (ret)
1013                                 return ret;
1014                         attr_last = or->enc_get_attr.buff +
1015                                 or->enc_get_attr.total_bytes;
1016                 }
1017
1018                 attrid = attr_last;
1019                 attrid->attr_page = cpu_to_be32(oa->attr_page);
1020                 attrid->attr_id = cpu_to_be32(oa->attr_id);
1021
1022                 attr_last += cur_size;
1023
1024                 /* calc data-in size */
1025                 or->get_attr.total_bytes +=
1026                         _osd_req_alist_elem_size(or, oa->len);
1027                 ++oa;
1028         }
1029
1030         or->enc_get_attr.total_bytes = total_bytes;
1031
1032         OSD_DEBUG(
1033                "get_attr.total_bytes=%u(%u) enc_get_attr.total_bytes=%u(%Zu)\n",
1034                or->get_attr.total_bytes,
1035                or->get_attr.total_bytes - _osd_req_sizeof_alist_header(or),
1036                or->enc_get_attr.total_bytes,
1037                (or->enc_get_attr.total_bytes - _osd_req_sizeof_alist_header(or))
1038                         / sizeof(struct osd_attributes_list_attrid));
1039
1040         return 0;
1041 }
1042 EXPORT_SYMBOL(osd_req_add_get_attr_list);
1043
1044 static int _osd_req_finalize_get_attr_list(struct osd_request *or)
1045 {
1046         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1047         unsigned out_padding;
1048         unsigned in_padding;
1049         int ret;
1050
1051         if (!or->enc_get_attr.total_bytes) {
1052                 cdbh->attrs_list.get_attr_desc_offset = OSD_OFFSET_UNUSED;
1053                 cdbh->attrs_list.get_attr_offset = OSD_OFFSET_UNUSED;
1054                 return 0;
1055         }
1056
1057         ret = _alloc_get_attr_list(or);
1058         if (ret)
1059                 return ret;
1060
1061         /* The out-going buffer info update */
1062         OSD_DEBUG("out-going\n");
1063         cdbh->attrs_list.get_attr_desc_bytes =
1064                 cpu_to_be32(or->enc_get_attr.total_bytes);
1065
1066         cdbh->attrs_list.get_attr_desc_offset =
1067                 osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
1068
1069         ret = _req_append_segment(or, out_padding, &or->enc_get_attr,
1070                                   or->out.last_seg, &or->out);
1071         if (ret)
1072                 return ret;
1073         or->out.last_seg = &or->enc_get_attr;
1074
1075         /* The incoming buffer info update */
1076         OSD_DEBUG("in-coming\n");
1077         cdbh->attrs_list.get_attr_alloc_length =
1078                 cpu_to_be32(or->get_attr.total_bytes);
1079
1080         cdbh->attrs_list.get_attr_offset =
1081                 osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
1082
1083         ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
1084                                   &or->in);
1085         if (ret)
1086                 return ret;
1087         or->in.last_seg = &or->get_attr;
1088
1089         return 0;
1090 }
1091
1092 int osd_req_decode_get_attr_list(struct osd_request *or,
1093         struct osd_attr *oa, int *nelem, void **iterator)
1094 {
1095         unsigned cur_bytes, returned_bytes;
1096         int n;
1097         const unsigned sizeof_attr_list = _osd_req_sizeof_alist_header(or);
1098         void *cur_p;
1099
1100         if (!_osd_req_is_alist_type(or, or->get_attr.buff,
1101                                     OSD_ATTR_LIST_SET_RETRIEVE)) {
1102                 oa->attr_page = 0;
1103                 oa->attr_id = 0;
1104                 oa->val_ptr = NULL;
1105                 oa->len = 0;
1106                 *iterator = NULL;
1107                 return 0;
1108         }
1109
1110         if (*iterator) {
1111                 BUG_ON((*iterator < or->get_attr.buff) ||
1112                      (or->get_attr.buff + or->get_attr.alloc_size < *iterator));
1113                 cur_p = *iterator;
1114                 cur_bytes = (*iterator - or->get_attr.buff) - sizeof_attr_list;
1115                 returned_bytes = or->get_attr.total_bytes;
1116         } else { /* first time decode the list header */
1117                 cur_bytes = sizeof_attr_list;
1118                 returned_bytes = _osd_req_alist_size(or, or->get_attr.buff) +
1119                                         sizeof_attr_list;
1120
1121                 cur_p = or->get_attr.buff + sizeof_attr_list;
1122
1123                 if (returned_bytes > or->get_attr.alloc_size) {
1124                         OSD_DEBUG("target report: space was not big enough! "
1125                                   "Allocate=%u Needed=%u\n",
1126                                   or->get_attr.alloc_size,
1127                                   returned_bytes + sizeof_attr_list);
1128
1129                         returned_bytes =
1130                                 or->get_attr.alloc_size - sizeof_attr_list;
1131                 }
1132                 or->get_attr.total_bytes = returned_bytes;
1133         }
1134
1135         for (n = 0; (n < *nelem) && (cur_bytes < returned_bytes); ++n) {
1136                 int inc = _osd_req_alist_elem_decode(or, cur_p, oa,
1137                                                  returned_bytes - cur_bytes);
1138
1139                 if (inc < 0) {
1140                         OSD_ERR("BAD FOOD from target. list not valid!"
1141                                 "c=%d r=%d n=%d\n",
1142                                 cur_bytes, returned_bytes, n);
1143                         oa->val_ptr = NULL;
1144                         break;
1145                 }
1146
1147                 cur_bytes += inc;
1148                 cur_p += inc;
1149                 ++oa;
1150         }
1151
1152         *iterator = (returned_bytes - cur_bytes) ? cur_p : NULL;
1153         *nelem = n;
1154         return returned_bytes - cur_bytes;
1155 }
1156 EXPORT_SYMBOL(osd_req_decode_get_attr_list);
1157
1158 /*
1159  * Attributes Page-mode
1160  */
1161
1162 int osd_req_add_get_attr_page(struct osd_request *or,
1163         u32 page_id, void *attar_page, unsigned max_page_len,
1164         const struct osd_attr *set_one_attr)
1165 {
1166         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1167
1168         if (or->attributes_mode &&
1169             or->attributes_mode != OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
1170                 WARN_ON(1);
1171                 return -EINVAL;
1172         }
1173         or->attributes_mode = OSD_CDB_GET_ATTR_PAGE_SET_ONE;
1174
1175         or->get_attr.buff = attar_page;
1176         or->get_attr.total_bytes = max_page_len;
1177
1178         or->set_attr.buff = set_one_attr->val_ptr;
1179         or->set_attr.total_bytes = set_one_attr->len;
1180
1181         cdbh->attrs_page.get_attr_page = cpu_to_be32(page_id);
1182         cdbh->attrs_page.get_attr_alloc_length = cpu_to_be32(max_page_len);
1183         /* ocdb->attrs_page.get_attr_offset; */
1184
1185         cdbh->attrs_page.set_attr_page = cpu_to_be32(set_one_attr->attr_page);
1186         cdbh->attrs_page.set_attr_id = cpu_to_be32(set_one_attr->attr_id);
1187         cdbh->attrs_page.set_attr_length = cpu_to_be32(set_one_attr->len);
1188         /* ocdb->attrs_page.set_attr_offset; */
1189         return 0;
1190 }
1191 EXPORT_SYMBOL(osd_req_add_get_attr_page);
1192
1193 static int _osd_req_finalize_attr_page(struct osd_request *or)
1194 {
1195         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1196         unsigned in_padding, out_padding;
1197         int ret;
1198
1199         /* returned page */
1200         cdbh->attrs_page.get_attr_offset =
1201                 osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
1202
1203         ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
1204                                   &or->in);
1205         if (ret)
1206                 return ret;
1207
1208         /* set one value */
1209         cdbh->attrs_page.set_attr_offset =
1210                 osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
1211
1212         ret = _req_append_segment(or, out_padding, &or->enc_get_attr, NULL,
1213                                   &or->out);
1214         return ret;
1215 }
1216
1217 static inline void osd_sec_parms_set_out_offset(bool is_v1,
1218         struct osd_security_parameters *sec_parms, osd_cdb_offset offset)
1219 {
1220         if (is_v1)
1221                 sec_parms->v1.data_out_integrity_check_offset = offset;
1222         else
1223                 sec_parms->v2.data_out_integrity_check_offset = offset;
1224 }
1225
1226 static inline void osd_sec_parms_set_in_offset(bool is_v1,
1227         struct osd_security_parameters *sec_parms, osd_cdb_offset offset)
1228 {
1229         if (is_v1)
1230                 sec_parms->v1.data_in_integrity_check_offset = offset;
1231         else
1232                 sec_parms->v2.data_in_integrity_check_offset = offset;
1233 }
1234
1235 static int _osd_req_finalize_data_integrity(struct osd_request *or,
1236         bool has_in, bool has_out, const u8 *cap_key)
1237 {
1238         struct osd_security_parameters *sec_parms = _osd_req_sec_params(or);
1239         int ret;
1240
1241         if (!osd_is_sec_alldata(sec_parms))
1242                 return 0;
1243
1244         if (has_out) {
1245                 struct _osd_req_data_segment seg = {
1246                         .buff = &or->out_data_integ,
1247                         .total_bytes = sizeof(or->out_data_integ),
1248                 };
1249                 unsigned pad;
1250
1251                 or->out_data_integ.data_bytes = cpu_to_be64(
1252                         or->out.bio ? or->out.bio->bi_size : 0);
1253                 or->out_data_integ.set_attributes_bytes = cpu_to_be64(
1254                         or->set_attr.total_bytes);
1255                 or->out_data_integ.get_attributes_bytes = cpu_to_be64(
1256                         or->enc_get_attr.total_bytes);
1257
1258                 osd_sec_parms_set_out_offset(osd_req_is_ver1(or), sec_parms,
1259                         osd_req_encode_offset(or, or->out.total_bytes, &pad));
1260
1261                 ret = _req_append_segment(or, pad, &seg, or->out.last_seg,
1262                                           &or->out);
1263                 if (ret)
1264                         return ret;
1265                 or->out.last_seg = NULL;
1266
1267                 /* they are now all chained to request sign them all together */
1268                 osd_sec_sign_data(&or->out_data_integ, or->out.req->bio,
1269                                   cap_key);
1270         }
1271
1272         if (has_in) {
1273                 struct _osd_req_data_segment seg = {
1274                         .buff = &or->in_data_integ,
1275                         .total_bytes = sizeof(or->in_data_integ),
1276                 };
1277                 unsigned pad;
1278
1279                 osd_sec_parms_set_in_offset(osd_req_is_ver1(or), sec_parms,
1280                         osd_req_encode_offset(or, or->in.total_bytes, &pad));
1281
1282                 ret = _req_append_segment(or, pad, &seg, or->in.last_seg,
1283                                           &or->in);
1284                 if (ret)
1285                         return ret;
1286
1287                 or->in.last_seg = NULL;
1288         }
1289
1290         return 0;
1291 }
1292
1293 /*
1294  * osd_finalize_request and helpers
1295  */
1296
1297 static int _init_blk_request(struct osd_request *or,
1298         bool has_in, bool has_out)
1299 {
1300         gfp_t flags = or->alloc_flags;
1301         struct scsi_device *scsi_device = or->osd_dev->scsi_device;
1302         struct request_queue *q = scsi_device->request_queue;
1303         struct request *req;
1304         int ret = -ENOMEM;
1305
1306         req = blk_get_request(q, has_out, flags);
1307         if (!req)
1308                 goto out;
1309
1310         or->request = req;
1311         req->cmd_type = REQ_TYPE_BLOCK_PC;
1312         req->timeout = or->timeout;
1313         req->retries = or->retries;
1314         req->sense = or->sense;
1315         req->sense_len = 0;
1316
1317         if (has_out) {
1318                 or->out.req = req;
1319                 if (has_in) {
1320                         /* allocate bidi request */
1321                         req = blk_get_request(q, READ, flags);
1322                         if (!req) {
1323                                 OSD_DEBUG("blk_get_request for bidi failed\n");
1324                                 goto out;
1325                         }
1326                         req->cmd_type = REQ_TYPE_BLOCK_PC;
1327                         or->in.req = or->request->next_rq = req;
1328                 }
1329         } else if (has_in)
1330                 or->in.req = req;
1331
1332         ret = 0;
1333 out:
1334         OSD_DEBUG("or=%p has_in=%d has_out=%d => %d, %p\n",
1335                         or, has_in, has_out, ret, or->request);
1336         return ret;
1337 }
1338
1339 int osd_finalize_request(struct osd_request *or,
1340         u8 options, const void *cap, const u8 *cap_key)
1341 {
1342         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1343         bool has_in, has_out;
1344         int ret;
1345
1346         if (options & OSD_REQ_FUA)
1347                 cdbh->options |= OSD_CDB_FUA;
1348
1349         if (options & OSD_REQ_DPO)
1350                 cdbh->options |= OSD_CDB_DPO;
1351
1352         if (options & OSD_REQ_BYPASS_TIMESTAMPS)
1353                 cdbh->timestamp_control = OSD_CDB_BYPASS_TIMESTAMPS;
1354
1355         osd_set_caps(&or->cdb, cap);
1356
1357         has_in = or->in.bio || or->get_attr.total_bytes;
1358         has_out = or->out.bio || or->set_attr.total_bytes ||
1359                 or->enc_get_attr.total_bytes;
1360
1361         ret = _init_blk_request(or, has_in, has_out);
1362         if (ret) {
1363                 OSD_DEBUG("_init_blk_request failed\n");
1364                 return ret;
1365         }
1366
1367         if (or->out.bio) {
1368                 ret = blk_rq_append_bio(or->request->q, or->out.req,
1369                                         or->out.bio);
1370                 if (ret) {
1371                         OSD_DEBUG("blk_rq_append_bio out failed\n");
1372                         return ret;
1373                 }
1374                 OSD_DEBUG("out bytes=%llu (bytes_req=%u)\n",
1375                         _LLU(or->out.total_bytes), or->out.req->data_len);
1376         }
1377         if (or->in.bio) {
1378                 ret = blk_rq_append_bio(or->request->q, or->in.req, or->in.bio);
1379                 if (ret) {
1380                         OSD_DEBUG("blk_rq_append_bio in failed\n");
1381                         return ret;
1382                 }
1383                 OSD_DEBUG("in bytes=%llu (bytes_req=%u)\n",
1384                         _LLU(or->in.total_bytes), or->in.req->data_len);
1385         }
1386
1387         or->out.pad_buff = sg_out_pad_buffer;
1388         or->in.pad_buff = sg_in_pad_buffer;
1389
1390         if (!or->attributes_mode)
1391                 or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
1392         cdbh->command_specific_options |= or->attributes_mode;
1393         if (or->attributes_mode == OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
1394                 ret = _osd_req_finalize_attr_page(or);
1395         } else {
1396                 /* TODO: I think that for the GET_ATTR command these 2 should
1397                  * be reversed to keep them in execution order (for embeded
1398                  * targets with low memory footprint)
1399                  */
1400                 ret = _osd_req_finalize_set_attr_list(or);
1401                 if (ret) {
1402                         OSD_DEBUG("_osd_req_finalize_set_attr_list failed\n");
1403                         return ret;
1404                 }
1405
1406                 ret = _osd_req_finalize_get_attr_list(or);
1407                 if (ret) {
1408                         OSD_DEBUG("_osd_req_finalize_get_attr_list failed\n");
1409                         return ret;
1410                 }
1411         }
1412
1413         ret = _osd_req_finalize_data_integrity(or, has_in, has_out, cap_key);
1414         if (ret)
1415                 return ret;
1416
1417         osd_sec_sign_cdb(&or->cdb, cap_key);
1418
1419         or->request->cmd = or->cdb.buff;
1420         or->request->cmd_len = _osd_req_cdb_len(or);
1421
1422         return 0;
1423 }
1424 EXPORT_SYMBOL(osd_finalize_request);
1425
1426 #define OSD_SENSE_PRINT1(fmt, a...) \
1427         do { \
1428                 if (__cur_sense_need_output) \
1429                         OSD_ERR(fmt, ##a); \
1430         } while (0)
1431
1432 #define OSD_SENSE_PRINT2(fmt, a...) OSD_SENSE_PRINT1("    " fmt, ##a)
1433
1434 int osd_req_decode_sense_full(struct osd_request *or,
1435         struct osd_sense_info *osi, bool silent,
1436         struct osd_obj_id *bad_obj_list __unused, int max_obj __unused,
1437         struct osd_attr *bad_attr_list, int max_attr)
1438 {
1439         int sense_len, original_sense_len;
1440         struct osd_sense_info local_osi;
1441         struct scsi_sense_descriptor_based *ssdb;
1442         void *cur_descriptor;
1443 #if (CONFIG_SCSI_OSD_DPRINT_SENSE == 0)
1444         const bool __cur_sense_need_output = false;
1445 #else
1446         bool __cur_sense_need_output = !silent;
1447 #endif
1448
1449         if (!or->request->errors)
1450                 return 0;
1451
1452         ssdb = or->request->sense;
1453         sense_len = or->request->sense_len;
1454         if ((sense_len < (int)sizeof(*ssdb) || !ssdb->sense_key)) {
1455                 OSD_ERR("Block-layer returned error(0x%x) but "
1456                         "sense_len(%u) || key(%d) is empty\n",
1457                         or->request->errors, sense_len, ssdb->sense_key);
1458                 return -EIO;
1459         }
1460
1461         if ((ssdb->response_code != 0x72) && (ssdb->response_code != 0x73)) {
1462                 OSD_ERR("Unrecognized scsi sense: rcode=%x length=%d\n",
1463                         ssdb->response_code, sense_len);
1464                 return -EIO;
1465         }
1466
1467         osi = osi ? : &local_osi;
1468         memset(osi, 0, sizeof(*osi));
1469         osi->key = ssdb->sense_key;
1470         osi->additional_code = be16_to_cpu(ssdb->additional_sense_code);
1471         original_sense_len = ssdb->additional_sense_length + 8;
1472
1473 #if (CONFIG_SCSI_OSD_DPRINT_SENSE == 1)
1474         if (__cur_sense_need_output)
1475                 __cur_sense_need_output = (osi->key > scsi_sk_recovered_error);
1476 #endif
1477         OSD_SENSE_PRINT1("Main Sense information key=0x%x length(%d, %d) "
1478                         "additional_code=0x%x\n",
1479                         osi->key, original_sense_len, sense_len,
1480                         osi->additional_code);
1481
1482         if (original_sense_len < sense_len)
1483                 sense_len = original_sense_len;
1484
1485         cur_descriptor = ssdb->ssd;
1486         sense_len -= sizeof(*ssdb);
1487         while (sense_len > 0) {
1488                 struct scsi_sense_descriptor *ssd = cur_descriptor;
1489                 int cur_len = ssd->additional_length + 2;
1490
1491                 sense_len -= cur_len;
1492
1493                 if (sense_len < 0)
1494                         break; /* sense was truncated */
1495
1496                 switch (ssd->descriptor_type) {
1497                 case scsi_sense_information:
1498                 case scsi_sense_command_specific_information:
1499                 {
1500                         struct scsi_sense_command_specific_data_descriptor
1501                                 *sscd = cur_descriptor;
1502
1503                         osi->command_info =
1504                                 get_unaligned_be64(&sscd->information) ;
1505                         OSD_SENSE_PRINT2(
1506                                 "command_specific_information 0x%llx \n",
1507                                 _LLU(osi->command_info));
1508                         break;
1509                 }
1510                 case scsi_sense_key_specific:
1511                 {
1512                         struct scsi_sense_key_specific_data_descriptor
1513                                 *ssks = cur_descriptor;
1514
1515                         osi->sense_info = get_unaligned_be16(&ssks->value);
1516                         OSD_SENSE_PRINT2(
1517                                 "sense_key_specific_information %u"
1518                                 "sksv_cd_bpv_bp (0x%x)\n",
1519                                 osi->sense_info, ssks->sksv_cd_bpv_bp);
1520                         break;
1521                 }
1522                 case osd_sense_object_identification:
1523                 { /*FIXME: Keep first not last, Store in array*/
1524                         struct osd_sense_identification_data_descriptor
1525                                 *osidd = cur_descriptor;
1526
1527                         osi->not_initiated_command_functions =
1528                                 le32_to_cpu(osidd->not_initiated_functions);
1529                         osi->completed_command_functions =
1530                                 le32_to_cpu(osidd->completed_functions);
1531                         osi->obj.partition = be64_to_cpu(osidd->partition_id);
1532                         osi->obj.id = be64_to_cpu(osidd->object_id);
1533                         OSD_SENSE_PRINT2(
1534                                 "object_identification pid=0x%llx oid=0x%llx\n",
1535                                 _LLU(osi->obj.partition), _LLU(osi->obj.id));
1536                         OSD_SENSE_PRINT2(
1537                                 "not_initiated_bits(%x) "
1538                                 "completed_command_bits(%x)\n",
1539                                 osi->not_initiated_command_functions,
1540                                 osi->completed_command_functions);
1541                         break;
1542                 }
1543                 case osd_sense_response_integrity_check:
1544                 {
1545                         struct osd_sense_response_integrity_check_descriptor
1546                                 *osricd = cur_descriptor;
1547                         const unsigned len =
1548                                           sizeof(osricd->integrity_check_value);
1549                         char key_dump[len*4 + 2]; /* 2nibbles+space+ASCII */
1550
1551                         hex_dump_to_buffer(osricd->integrity_check_value, len,
1552                                        32, 1, key_dump, sizeof(key_dump), true);
1553                         OSD_SENSE_PRINT2("response_integrity [%s]\n", key_dump);
1554                 }
1555                 case osd_sense_attribute_identification:
1556                 {
1557                         struct osd_sense_attributes_data_descriptor
1558                                 *osadd = cur_descriptor;
1559                         int len = min(cur_len, sense_len);
1560                         int i = 0;
1561                         struct osd_sense_attr *pattr = osadd->sense_attrs;
1562
1563                         while (len < 0) {
1564                                 u32 attr_page = be32_to_cpu(pattr->attr_page);
1565                                 u32 attr_id = be32_to_cpu(pattr->attr_id);
1566
1567                                 if (i++ == 0) {
1568                                         osi->attr.attr_page = attr_page;
1569                                         osi->attr.attr_id = attr_id;
1570                                 }
1571
1572                                 if (bad_attr_list && max_attr) {
1573                                         bad_attr_list->attr_page = attr_page;
1574                                         bad_attr_list->attr_id = attr_id;
1575                                         bad_attr_list++;
1576                                         max_attr--;
1577                                 }
1578                                 OSD_SENSE_PRINT2(
1579                                         "osd_sense_attribute_identification"
1580                                         "attr_page=0x%x attr_id=0x%x\n",
1581                                         attr_page, attr_id);
1582                         }
1583                 }
1584                 /*These are not legal for OSD*/
1585                 case scsi_sense_field_replaceable_unit:
1586                         OSD_SENSE_PRINT2("scsi_sense_field_replaceable_unit\n");
1587                         break;
1588                 case scsi_sense_stream_commands:
1589                         OSD_SENSE_PRINT2("scsi_sense_stream_commands\n");
1590                         break;
1591                 case scsi_sense_block_commands:
1592                         OSD_SENSE_PRINT2("scsi_sense_block_commands\n");
1593                         break;
1594                 case scsi_sense_ata_return:
1595                         OSD_SENSE_PRINT2("scsi_sense_ata_return\n");
1596                         break;
1597                 default:
1598                         if (ssd->descriptor_type <= scsi_sense_Reserved_last)
1599                                 OSD_SENSE_PRINT2(
1600                                         "scsi_sense Reserved descriptor (0x%x)",
1601                                         ssd->descriptor_type);
1602                         else
1603                                 OSD_SENSE_PRINT2(
1604                                         "scsi_sense Vendor descriptor (0x%x)",
1605                                         ssd->descriptor_type);
1606                 }
1607
1608                 cur_descriptor += cur_len;
1609         }
1610
1611         return (osi->key > scsi_sk_recovered_error) ? -EIO : 0;
1612 }
1613 EXPORT_SYMBOL(osd_req_decode_sense_full);
1614
1615 /*
1616  * Implementation of osd_sec.h API
1617  * TODO: Move to a separate osd_sec.c file at a later stage.
1618  */
1619
1620 enum { OSD_SEC_CAP_V1_ALL_CAPS =
1621         OSD_SEC_CAP_APPEND | OSD_SEC_CAP_OBJ_MGMT | OSD_SEC_CAP_REMOVE   |
1622         OSD_SEC_CAP_CREATE | OSD_SEC_CAP_SET_ATTR | OSD_SEC_CAP_GET_ATTR |
1623         OSD_SEC_CAP_WRITE  | OSD_SEC_CAP_READ     | OSD_SEC_CAP_POL_SEC  |
1624         OSD_SEC_CAP_GLOBAL | OSD_SEC_CAP_DEV_MGMT
1625 };
1626
1627 enum { OSD_SEC_CAP_V2_ALL_CAPS =
1628         OSD_SEC_CAP_V1_ALL_CAPS | OSD_SEC_CAP_QUERY | OSD_SEC_CAP_M_OBJECT
1629 };
1630
1631 void osd_sec_init_nosec_doall_caps(void *caps,
1632         const struct osd_obj_id *obj, bool is_collection, const bool is_v1)
1633 {
1634         struct osd_capability *cap = caps;
1635         u8 type;
1636         u8 descriptor_type;
1637
1638         if (likely(obj->id)) {
1639                 if (unlikely(is_collection)) {
1640                         type = OSD_SEC_OBJ_COLLECTION;
1641                         descriptor_type = is_v1 ? OSD_SEC_OBJ_DESC_OBJ :
1642                                                   OSD_SEC_OBJ_DESC_COL;
1643                 } else {
1644                         type = OSD_SEC_OBJ_USER;
1645                         descriptor_type = OSD_SEC_OBJ_DESC_OBJ;
1646                 }
1647                 WARN_ON(!obj->partition);
1648         } else {
1649                 type = obj->partition ? OSD_SEC_OBJ_PARTITION :
1650                                         OSD_SEC_OBJ_ROOT;
1651                 descriptor_type = OSD_SEC_OBJ_DESC_PAR;
1652         }
1653
1654         memset(cap, 0, sizeof(*cap));
1655
1656         cap->h.format = OSD_SEC_CAP_FORMAT_VER1;
1657         cap->h.integrity_algorithm__key_version = 0; /* MAKE_BYTE(0, 0); */
1658         cap->h.security_method = OSD_SEC_NOSEC;
1659 /*      cap->expiration_time;
1660         cap->AUDIT[30-10];
1661         cap->discriminator[42-30];
1662         cap->object_created_time; */
1663         cap->h.object_type = type;
1664         osd_sec_set_caps(&cap->h, OSD_SEC_CAP_V1_ALL_CAPS);
1665         cap->h.object_descriptor_type = descriptor_type;
1666         cap->od.obj_desc.policy_access_tag = 0;
1667         cap->od.obj_desc.allowed_partition_id = cpu_to_be64(obj->partition);
1668         cap->od.obj_desc.allowed_object_id = cpu_to_be64(obj->id);
1669 }
1670 EXPORT_SYMBOL(osd_sec_init_nosec_doall_caps);
1671
1672 /* FIXME: Extract version from caps pointer.
1673  *        Also Pete's target only supports caps from OSDv1 for now
1674  */
1675 void osd_set_caps(struct osd_cdb *cdb, const void *caps)
1676 {
1677         bool is_ver1 = true;
1678         /* NOTE: They start at same address */
1679         memcpy(&cdb->v1.caps, caps, is_ver1 ? OSDv1_CAP_LEN : OSD_CAP_LEN);
1680 }
1681
1682 bool osd_is_sec_alldata(struct osd_security_parameters *sec_parms __unused)
1683 {
1684         return false;
1685 }
1686
1687 void osd_sec_sign_cdb(struct osd_cdb *ocdb __unused, const u8 *cap_key __unused)
1688 {
1689 }
1690
1691 void osd_sec_sign_data(void *data_integ __unused,
1692                        struct bio *bio __unused, const u8 *cap_key __unused)
1693 {
1694 }
1695
1696 /*
1697  * Declared in osd_protocol.h
1698  * 4.12.5 Data-In and Data-Out buffer offsets
1699  * byte offset = mantissa * (2^(exponent+8))
1700  * Returns the smallest allowed encoded offset that contains given @offset
1701  * The actual encoded offset returned is @offset + *@padding.
1702  */
1703 osd_cdb_offset __osd_encode_offset(
1704         u64 offset, unsigned *padding, int min_shift, int max_shift)
1705 {
1706         u64 try_offset = -1, mod, align;
1707         osd_cdb_offset be32_offset;
1708         int shift;
1709
1710         *padding = 0;
1711         if (!offset)
1712                 return 0;
1713
1714         for (shift = min_shift; shift < max_shift; ++shift) {
1715                 try_offset = offset >> shift;
1716                 if (try_offset < (1 << OSD_OFFSET_MAX_BITS))
1717                         break;
1718         }
1719
1720         BUG_ON(shift == max_shift);
1721
1722         align = 1 << shift;
1723         mod = offset & (align - 1);
1724         if (mod) {
1725                 *padding = align - mod;
1726                 try_offset += 1;
1727         }
1728
1729         try_offset |= ((shift - 8) & 0xf) << 28;
1730         be32_offset = cpu_to_be32((u32)try_offset);
1731
1732         OSD_DEBUG("offset=%llu mantissa=%llu exp=%d encoded=%x pad=%d\n",
1733                  _LLU(offset), _LLU(try_offset & 0x0FFFFFFF), shift,
1734                  be32_offset, *padding);
1735         return be32_offset;
1736 }