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 unsigned _osd_req_alist_size(struct osd_request *or, void *list_head)
 209 {
 210         return osd_req_is_ver1(or) ?
 211                 osdv1_list_size(list_head) :
 212                 osdv2_list_size(list_head);
 213 }
 214
 215 static unsigned _osd_req_sizeof_alist_header(struct osd_request *or)
 216 {
 217         return osd_req_is_ver1(or) ?
 218                 sizeof(struct osdv1_attributes_list_header) :
 219                 sizeof(struct osdv2_attributes_list_header);
 220 }
 221
 222 static void _osd_req_set_alist_type(struct osd_request *or,
 223         void *list, int list_type)
 224 {
 225         if (osd_req_is_ver1(or)) {
 226                 struct osdv1_attributes_list_header *attr_list = list;
 227
 228                 memset(attr_list, 0, sizeof(*attr_list));
 229                 attr_list->type = list_type;
 230         } else {
 231                 struct osdv2_attributes_list_header *attr_list = list;
 232
 233                 memset(attr_list, 0, sizeof(*attr_list));
 234                 attr_list->type = list_type;
 235         }
 236 }
 237
 238 static bool _osd_req_is_alist_type(struct osd_request *or,
 239         void *list, int list_type)
 240 {
 241         if (!list)
 242                 return false;
 243
 244         if (osd_req_is_ver1(or)) {
 245                 struct osdv1_attributes_list_header *attr_list = list;
 246
 247                 return attr_list->type == list_type;
 248         } else {
 249                 struct osdv2_attributes_list_header *attr_list = list;
 250
 251                 return attr_list->type == list_type;
 252         }
 253 }
 254
 255 /* This is for List-objects not Attributes-Lists */
 256 static void _osd_req_encode_olist(struct osd_request *or,
 257         struct osd_obj_id_list *list)
 258 {
 259         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
 260
 261         if (osd_req_is_ver1(or)) {
 262                 cdbh->v1.list_identifier = list->list_identifier;
 263                 cdbh->v1.start_address = list->continuation_id;
 264         } else {
 265                 cdbh->v2.list_identifier = list->list_identifier;
 266                 cdbh->v2.start_address = list->continuation_id;
 267         }
 268 }
 269
 270 static osd_cdb_offset osd_req_encode_offset(struct osd_request *or,
 271         u64 offset, unsigned *padding)
 272 {
 273         return __osd_encode_offset(offset, padding,
 274                         osd_req_is_ver1(or) ?
 275                                 OSDv1_OFFSET_MIN_SHIFT : OSD_OFFSET_MIN_SHIFT,
 276                         OSD_OFFSET_MAX_SHIFT);
 277 }
 278
 279 static struct osd_security_parameters *
 280 _osd_req_sec_params(struct osd_request *or)
 281 {
 282         struct osd_cdb *ocdb = &or->cdb;
 283
 284         if (osd_req_is_ver1(or))
 285                 return &ocdb->v1.sec_params;
 286         else
 287                 return &ocdb->v2.sec_params;
 288 }
 289
 290 void osd_dev_init(struct osd_dev *osdd, struct scsi_device *scsi_device)
 291 {
 292         memset(osdd, 0, sizeof(*osdd));
 293         osdd->scsi_device = scsi_device;
 294         osdd->def_timeout = BLK_DEFAULT_SG_TIMEOUT;
 295 #ifdef OSD_VER1_SUPPORT
 296         osdd->version = OSD_VER2;
 297 #endif
 298         /* TODO: Allocate pools for osd_request attributes ... */
 299 }
 300 EXPORT_SYMBOL(osd_dev_init);
 301
 302 void osd_dev_fini(struct osd_dev *osdd)
 303 {
 304         /* TODO: De-allocate pools */
 305
 306         osdd->scsi_device = NULL;
 307 }
 308 EXPORT_SYMBOL(osd_dev_fini);
 309
 310 static struct osd_request *_osd_request_alloc(gfp_t gfp)
 311 {
 312         struct osd_request *or;
 313
 314         /* TODO: Use mempool with one saved request */
 315         or = kzalloc(sizeof(*or), gfp);
 316         return or;
 317 }
 318
 319 static void _osd_request_free(struct osd_request *or)
 320 {
 321         kfree(or);
 322 }
 323
 324 struct osd_request *osd_start_request(struct osd_dev *dev, gfp_t gfp)
 325 {
 326         struct osd_request *or;
 327
 328         or = _osd_request_alloc(gfp);
 329         if (!or)
 330                 return NULL;
 331
 332         or->osd_dev = dev;
 333         or->alloc_flags = gfp;
 334         or->timeout = dev->def_timeout;
 335         or->retries = OSD_REQ_RETRIES;
 336
 337         return or;
 338 }
 339 EXPORT_SYMBOL(osd_start_request);
 340
 341 /*
 342  * If osd_finalize_request() was called but the request was not executed through
 343  * the block layer, then we must release BIOs.
 344  */
 345 static void _abort_unexecuted_bios(struct request *rq)
 346 {
 347         struct bio *bio;
 348
 349         while ((bio = rq->bio) != NULL) {
 350                 rq->bio = bio->bi_next;
 351                 bio_endio(bio, 0);
 352         }
 353 }
 354
 355 static void _osd_free_seg(struct osd_request *or __unused,
 356         struct _osd_req_data_segment *seg)
 357 {
 358         if (!seg->buff || !seg->alloc_size)
 359                 return;
 360
 361         kfree(seg->buff);
 362         seg->buff = NULL;
 363         seg->alloc_size = 0;
 364 }
 365
 366 void osd_end_request(struct osd_request *or)
 367 {
 368         struct request *rq = or->request;
 369
 370         _osd_free_seg(or, &or->set_attr);
 371         _osd_free_seg(or, &or->enc_get_attr);
 372         _osd_free_seg(or, &or->get_attr);
 373
 374         if (rq) {
 375                 if (rq->next_rq) {
 376                         _abort_unexecuted_bios(rq->next_rq);
 377                         blk_put_request(rq->next_rq);
 378                 }
 379
 380                 _abort_unexecuted_bios(rq);
 381                 blk_put_request(rq);
 382         }
 383         _osd_request_free(or);
 384 }
 385 EXPORT_SYMBOL(osd_end_request);
 386
 387 int osd_execute_request(struct osd_request *or)
 388 {
 389         return blk_execute_rq(or->request->q, NULL, or->request, 0);
 390 }
 391 EXPORT_SYMBOL(osd_execute_request);
 392
 393 static void osd_request_async_done(struct request *req, int error)
 394 {
 395         struct osd_request *or = req->end_io_data;
 396
 397         or->async_error = error;
 398
 399         if (error)
 400                 OSD_DEBUG("osd_request_async_done error recieved %d\n", error);
 401
 402         if (or->async_done)
 403                 or->async_done(or, or->async_private);
 404         else
 405                 osd_end_request(or);
 406 }
 407
 408 int osd_execute_request_async(struct osd_request *or,
 409         osd_req_done_fn *done, void *private)
 410 {
 411         or->request->end_io_data = or;
 412         or->async_private = private;
 413         or->async_done = done;
 414
 415         blk_execute_rq_nowait(or->request->q, NULL, or->request, 0,
 416                               osd_request_async_done);
 417         return 0;
 418 }
 419 EXPORT_SYMBOL(osd_execute_request_async);
 420
 421 u8 sg_out_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
 422 u8 sg_in_pad_buffer[1 << OSDv1_OFFSET_MIN_SHIFT];
 423
 424 static int _osd_realloc_seg(struct osd_request *or,
 425         struct _osd_req_data_segment *seg, unsigned max_bytes)
 426 {
 427         void *buff;
 428
 429         if (seg->alloc_size >= max_bytes)
 430                 return 0;
 431
 432         buff = krealloc(seg->buff, max_bytes, or->alloc_flags);
 433         if (!buff) {
 434                 OSD_ERR("Failed to Realloc %d-bytes was-%d\n", max_bytes,
 435                         seg->alloc_size);
 436                 return -ENOMEM;
 437         }
 438
 439         memset(buff + seg->alloc_size, 0, max_bytes - seg->alloc_size);
 440         seg->buff = buff;
 441         seg->alloc_size = max_bytes;
 442         return 0;
 443 }
 444
 445 static int _alloc_set_attr_list(struct osd_request *or,
 446         const struct osd_attr *oa, unsigned nelem, unsigned add_bytes)
 447 {
 448         unsigned total_bytes = add_bytes;
 449
 450         for (; nelem; --nelem, ++oa)
 451                 total_bytes += _osd_req_alist_elem_size(or, oa->len);
 452
 453         OSD_DEBUG("total_bytes=%d\n", total_bytes);
 454         return _osd_realloc_seg(or, &or->set_attr, total_bytes);
 455 }
 456
 457 static int _alloc_get_attr_desc(struct osd_request *or, unsigned max_bytes)
 458 {
 459         OSD_DEBUG("total_bytes=%d\n", max_bytes);
 460         return _osd_realloc_seg(or, &or->enc_get_attr, max_bytes);
 461 }
 462
 463 static int _alloc_get_attr_list(struct osd_request *or)
 464 {
 465         OSD_DEBUG("total_bytes=%d\n", or->get_attr.total_bytes);
 466         return _osd_realloc_seg(or, &or->get_attr, or->get_attr.total_bytes);
 467 }
 468
 469 /*
 470  * Common to all OSD commands
 471  */
 472
 473 static void _osdv1_req_encode_common(struct osd_request *or,
 474         __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
 475 {
 476         struct osdv1_cdb *ocdb = &or->cdb.v1;
 477
 478         /*
 479          * For speed, the commands
 480          *      OSD_ACT_PERFORM_SCSI_COMMAND    , V1 0x8F7E, V2 0x8F7C
 481          *      OSD_ACT_SCSI_TASK_MANAGEMENT    , V1 0x8F7F, V2 0x8F7D
 482          * are not supported here. Should pass zero and set after the call
 483          */
 484         act &= cpu_to_be16(~0x0080); /* V1 action code */
 485
 486         OSD_DEBUG("OSDv1 execute opcode 0x%x\n", be16_to_cpu(act));
 487
 488         ocdb->h.varlen_cdb.opcode = VARIABLE_LENGTH_CMD;
 489         ocdb->h.varlen_cdb.additional_cdb_length = OSD_ADDITIONAL_CDB_LENGTH;
 490         ocdb->h.varlen_cdb.service_action = act;
 491
 492         ocdb->h.partition = cpu_to_be64(obj->partition);
 493         ocdb->h.object = cpu_to_be64(obj->id);
 494         ocdb->h.v1.length = cpu_to_be64(len);
 495         ocdb->h.v1.start_address = cpu_to_be64(offset);
 496 }
 497
 498 static void _osdv2_req_encode_common(struct osd_request *or,
 499          __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
 500 {
 501         struct osdv2_cdb *ocdb = &or->cdb.v2;
 502
 503         OSD_DEBUG("OSDv2 execute opcode 0x%x\n", be16_to_cpu(act));
 504
 505         ocdb->h.varlen_cdb.opcode = VARIABLE_LENGTH_CMD;
 506         ocdb->h.varlen_cdb.additional_cdb_length = OSD_ADDITIONAL_CDB_LENGTH;
 507         ocdb->h.varlen_cdb.service_action = act;
 508
 509         ocdb->h.partition = cpu_to_be64(obj->partition);
 510         ocdb->h.object = cpu_to_be64(obj->id);
 511         ocdb->h.v2.length = cpu_to_be64(len);
 512         ocdb->h.v2.start_address = cpu_to_be64(offset);
 513 }
 514
 515 static void _osd_req_encode_common(struct osd_request *or,
 516         __be16 act, const struct osd_obj_id *obj, u64 offset, u64 len)
 517 {
 518         if (osd_req_is_ver1(or))
 519                 _osdv1_req_encode_common(or, act, obj, offset, len);
 520         else
 521                 _osdv2_req_encode_common(or, act, obj, offset, len);
 522 }
 523
 524 /*
 525  * Device commands
 526  */
 527 /*TODO: void osd_req_set_master_seed_xchg(struct osd_request *, ...); */
 528 /*TODO: void osd_req_set_master_key(struct osd_request *, ...); */
 529
 530 void osd_req_format(struct osd_request *or, u64 tot_capacity)
 531 {
 532         _osd_req_encode_common(or, OSD_ACT_FORMAT_OSD, &osd_root_object, 0,
 533                                 tot_capacity);
 534 }
 535 EXPORT_SYMBOL(osd_req_format);
 536
 537 int osd_req_list_dev_partitions(struct osd_request *or,
 538         osd_id initial_id, struct osd_obj_id_list *list, unsigned nelem)
 539 {
 540         return osd_req_list_partition_objects(or, 0, initial_id, list, nelem);
 541 }
 542 EXPORT_SYMBOL(osd_req_list_dev_partitions);
 543
 544 static void _osd_req_encode_flush(struct osd_request *or,
 545         enum osd_options_flush_scope_values op)
 546 {
 547         struct osd_cdb_head *ocdb = osd_cdb_head(&or->cdb);
 548
 549         ocdb->command_specific_options = op;
 550 }
 551
 552 void osd_req_flush_obsd(struct osd_request *or,
 553         enum osd_options_flush_scope_values op)
 554 {
 555         _osd_req_encode_common(or, OSD_ACT_FLUSH_OSD, &osd_root_object, 0, 0);
 556         _osd_req_encode_flush(or, op);
 557 }
 558 EXPORT_SYMBOL(osd_req_flush_obsd);
 559
 560 /*TODO: void osd_req_perform_scsi_command(struct osd_request *,
 561         const u8 *cdb, ...); */
 562 /*TODO: void osd_req_task_management(struct osd_request *, ...); */
 563
 564 /*
 565  * Partition commands
 566  */
 567 static void _osd_req_encode_partition(struct osd_request *or,
 568         __be16 act, osd_id partition)
 569 {
 570         struct osd_obj_id par = {
 571                 .partition = partition,
 572                 .id = 0,
 573         };
 574
 575         _osd_req_encode_common(or, act, &par, 0, 0);
 576 }
 577
 578 void osd_req_create_partition(struct osd_request *or, osd_id partition)
 579 {
 580         _osd_req_encode_partition(or, OSD_ACT_CREATE_PARTITION, partition);
 581 }
 582 EXPORT_SYMBOL(osd_req_create_partition);
 583
 584 void osd_req_remove_partition(struct osd_request *or, osd_id partition)
 585 {
 586         _osd_req_encode_partition(or, OSD_ACT_REMOVE_PARTITION, partition);
 587 }
 588 EXPORT_SYMBOL(osd_req_remove_partition);
 589
 590 /*TODO: void osd_req_set_partition_key(struct osd_request *,
 591         osd_id partition, u8 new_key_id[OSD_CRYPTO_KEYID_SIZE],
 592         u8 seed[OSD_CRYPTO_SEED_SIZE]); */
 593
 594 static int _osd_req_list_objects(struct osd_request *or,
 595         __be16 action, const struct osd_obj_id *obj, osd_id initial_id,
 596         struct osd_obj_id_list *list, unsigned nelem)
 597 {
 598         struct request_queue *q = or->osd_dev->scsi_device->request_queue;
 599         u64 len = nelem * sizeof(osd_id) + sizeof(*list);
 600         struct bio *bio;
 601
 602         _osd_req_encode_common(or, action, obj, (u64)initial_id, len);
 603
 604         if (list->list_identifier)
 605                 _osd_req_encode_olist(or, list);
 606
 607         WARN_ON(or->in.bio);
 608         bio = bio_map_kern(q, list, len, or->alloc_flags);
 609         if (!bio) {
 610                 OSD_ERR("!!! Failed to allocate list_objects BIO\n");
 611                 return -ENOMEM;
 612         }
 613
 614         bio->bi_rw &= ~(1 << BIO_RW);
 615         or->in.bio = bio;
 616         or->in.total_bytes = bio->bi_size;
 617         return 0;
 618 }
 619
 620 int osd_req_list_partition_collections(struct osd_request *or,
 621         osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
 622         unsigned nelem)
 623 {
 624         struct osd_obj_id par = {
 625                 .partition = partition,
 626                 .id = 0,
 627         };
 628
 629         return osd_req_list_collection_objects(or, &par, initial_id, list,
 630                                                nelem);
 631 }
 632 EXPORT_SYMBOL(osd_req_list_partition_collections);
 633
 634 int osd_req_list_partition_objects(struct osd_request *or,
 635         osd_id partition, osd_id initial_id, struct osd_obj_id_list *list,
 636         unsigned nelem)
 637 {
 638         struct osd_obj_id par = {
 639                 .partition = partition,
 640                 .id = 0,
 641         };
 642
 643         return _osd_req_list_objects(or, OSD_ACT_LIST, &par, initial_id, list,
 644                                      nelem);
 645 }
 646 EXPORT_SYMBOL(osd_req_list_partition_objects);
 647
 648 void osd_req_flush_partition(struct osd_request *or,
 649         osd_id partition, enum osd_options_flush_scope_values op)
 650 {
 651         _osd_req_encode_partition(or, OSD_ACT_FLUSH_PARTITION, partition);
 652         _osd_req_encode_flush(or, op);
 653 }
 654 EXPORT_SYMBOL(osd_req_flush_partition);
 655
 656 /*
 657  * Collection commands
 658  */
 659 /*TODO: void osd_req_create_collection(struct osd_request *,
 660         const struct osd_obj_id *); */
 661 /*TODO: void osd_req_remove_collection(struct osd_request *,
 662         const struct osd_obj_id *); */
 663
 664 int osd_req_list_collection_objects(struct osd_request *or,
 665         const struct osd_obj_id *obj, osd_id initial_id,
 666         struct osd_obj_id_list *list, unsigned nelem)
 667 {
 668         return _osd_req_list_objects(or, OSD_ACT_LIST_COLLECTION, obj,
 669                                      initial_id, list, nelem);
 670 }
 671 EXPORT_SYMBOL(osd_req_list_collection_objects);
 672
 673 /*TODO: void query(struct osd_request *, ...); V2 */
 674
 675 void osd_req_flush_collection(struct osd_request *or,
 676         const struct osd_obj_id *obj, enum osd_options_flush_scope_values op)
 677 {
 678         _osd_req_encode_common(or, OSD_ACT_FLUSH_PARTITION, obj, 0, 0);
 679         _osd_req_encode_flush(or, op);
 680 }
 681 EXPORT_SYMBOL(osd_req_flush_collection);
 682
 683 /*TODO: void get_member_attrs(struct osd_request *, ...); V2 */
 684 /*TODO: void set_member_attrs(struct osd_request *, ...); V2 */
 685
 686 /*
 687  * Object commands
 688  */
 689 void osd_req_create_object(struct osd_request *or, struct osd_obj_id *obj)
 690 {
 691         _osd_req_encode_common(or, OSD_ACT_CREATE, obj, 0, 0);
 692 }
 693 EXPORT_SYMBOL(osd_req_create_object);
 694
 695 void osd_req_remove_object(struct osd_request *or, struct osd_obj_id *obj)
 696 {
 697         _osd_req_encode_common(or, OSD_ACT_REMOVE, obj, 0, 0);
 698 }
 699 EXPORT_SYMBOL(osd_req_remove_object);
 700
 701
 702 /*TODO: void osd_req_create_multi(struct osd_request *or,
 703         struct osd_obj_id *first, struct osd_obj_id_list *list, unsigned nelem);
 704 */
 705
 706 void osd_req_write(struct osd_request *or,
 707         const struct osd_obj_id *obj, struct bio *bio, u64 offset)
 708 {
 709         _osd_req_encode_common(or, OSD_ACT_WRITE, obj, offset, bio->bi_size);
 710         WARN_ON(or->out.bio || or->out.total_bytes);
 711         bio->bi_rw |= (1 << BIO_RW);
 712         or->out.bio = bio;
 713         or->out.total_bytes = bio->bi_size;
 714 }
 715 EXPORT_SYMBOL(osd_req_write);
 716
 717 /*TODO: void osd_req_append(struct osd_request *,
 718         const struct osd_obj_id *, struct bio *data_out); */
 719 /*TODO: void osd_req_create_write(struct osd_request *,
 720         const struct osd_obj_id *, struct bio *data_out, u64 offset); */
 721 /*TODO: void osd_req_clear(struct osd_request *,
 722         const struct osd_obj_id *, u64 offset, u64 len); */
 723 /*TODO: void osd_req_punch(struct osd_request *,
 724         const struct osd_obj_id *, u64 offset, u64 len); V2 */
 725
 726 void osd_req_flush_object(struct osd_request *or,
 727         const struct osd_obj_id *obj, enum osd_options_flush_scope_values op,
 728         /*V2*/ u64 offset, /*V2*/ u64 len)
 729 {
 730         if (unlikely(osd_req_is_ver1(or) && (offset || len))) {
 731                 OSD_DEBUG("OSD Ver1 flush on specific range ignored\n");
 732                 offset = 0;
 733                 len = 0;
 734         }
 735
 736         _osd_req_encode_common(or, OSD_ACT_FLUSH, obj, offset, len);
 737         _osd_req_encode_flush(or, op);
 738 }
 739 EXPORT_SYMBOL(osd_req_flush_object);
 740
 741 void osd_req_read(struct osd_request *or,
 742         const struct osd_obj_id *obj, struct bio *bio, u64 offset)
 743 {
 744         _osd_req_encode_common(or, OSD_ACT_READ, obj, offset, bio->bi_size);
 745         WARN_ON(or->in.bio || or->in.total_bytes);
 746         bio->bi_rw &= ~(1 << BIO_RW);
 747         or->in.bio = bio;
 748         or->in.total_bytes = bio->bi_size;
 749 }
 750 EXPORT_SYMBOL(osd_req_read);
 751
 752 void osd_req_get_attributes(struct osd_request *or,
 753         const struct osd_obj_id *obj)
 754 {
 755         _osd_req_encode_common(or, OSD_ACT_GET_ATTRIBUTES, obj, 0, 0);
 756 }
 757 EXPORT_SYMBOL(osd_req_get_attributes);
 758
 759 void osd_req_set_attributes(struct osd_request *or,
 760         const struct osd_obj_id *obj)
 761 {
 762         _osd_req_encode_common(or, OSD_ACT_SET_ATTRIBUTES, obj, 0, 0);
 763 }
 764 EXPORT_SYMBOL(osd_req_set_attributes);
 765
 766 /*
 767  * Attributes List-mode
 768  */
 769
 770 int osd_req_add_set_attr_list(struct osd_request *or,
 771         const struct osd_attr *oa, unsigned nelem)
 772 {
 773         unsigned total_bytes = or->set_attr.total_bytes;
 774         void *attr_last;
 775         int ret;
 776
 777         if (or->attributes_mode &&
 778             or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
 779                 WARN_ON(1);
 780                 return -EINVAL;
 781         }
 782         or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
 783
 784         if (!total_bytes) { /* first-time: allocate and put list header */
 785                 total_bytes = _osd_req_sizeof_alist_header(or);
 786                 ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
 787                 if (ret)
 788                         return ret;
 789                 _osd_req_set_alist_type(or, or->set_attr.buff,
 790                                         OSD_ATTR_LIST_SET_RETRIEVE);
 791         }
 792         attr_last = or->set_attr.buff + total_bytes;
 793
 794         for (; nelem; --nelem) {
 795                 struct osd_attributes_list_element *attr;
 796                 unsigned elem_size = _osd_req_alist_elem_size(or, oa->len);
 797
 798                 total_bytes += elem_size;
 799                 if (unlikely(or->set_attr.alloc_size < total_bytes)) {
 800                         or->set_attr.total_bytes = total_bytes - elem_size;
 801                         ret = _alloc_set_attr_list(or, oa, nelem, total_bytes);
 802                         if (ret)
 803                                 return ret;
 804                         attr_last =
 805                                 or->set_attr.buff + or->set_attr.total_bytes;
 806                 }
 807
 808                 attr = attr_last;
 809                 attr->attr_page = cpu_to_be32(oa->attr_page);
 810                 attr->attr_id = cpu_to_be32(oa->attr_id);
 811                 attr->attr_bytes = cpu_to_be16(oa->len);
 812                 memcpy(attr->attr_val, oa->val_ptr, oa->len);
 813
 814                 attr_last += elem_size;
 815                 ++oa;
 816         }
 817
 818         or->set_attr.total_bytes = total_bytes;
 819         return 0;
 820 }
 821 EXPORT_SYMBOL(osd_req_add_set_attr_list);
 822
 823 static int _append_map_kern(struct request *req,
 824         void *buff, unsigned len, gfp_t flags)
 825 {
 826         struct bio *bio;
 827         int ret;
 828
 829         bio = bio_map_kern(req->q, buff, len, flags);
 830         if (IS_ERR(bio)) {
 831                 OSD_ERR("Failed bio_map_kern(%p, %d) => %ld\n", buff, len,
 832                         PTR_ERR(bio));
 833                 return PTR_ERR(bio);
 834         }
 835         ret = blk_rq_append_bio(req->q, req, bio);
 836         if (ret) {
 837                 OSD_ERR("Failed blk_rq_append_bio(%p) => %d\n", bio, ret);
 838                 bio_put(bio);
 839         }
 840         return ret;
 841 }
 842
 843 static int _req_append_segment(struct osd_request *or,
 844         unsigned padding, struct _osd_req_data_segment *seg,
 845         struct _osd_req_data_segment *last_seg, struct _osd_io_info *io)
 846 {
 847         void *pad_buff;
 848         int ret;
 849
 850         if (padding) {
 851                 /* check if we can just add it to last buffer */
 852                 if (last_seg &&
 853                     (padding <= last_seg->alloc_size - last_seg->total_bytes))
 854                         pad_buff = last_seg->buff + last_seg->total_bytes;
 855                 else
 856                         pad_buff = io->pad_buff;
 857
 858                 ret = _append_map_kern(io->req, pad_buff, padding,
 859                                        or->alloc_flags);
 860                 if (ret)
 861                         return ret;
 862                 io->total_bytes += padding;
 863         }
 864
 865         ret = _append_map_kern(io->req, seg->buff, seg->total_bytes,
 866                                or->alloc_flags);
 867         if (ret)
 868                 return ret;
 869
 870         io->total_bytes += seg->total_bytes;
 871         OSD_DEBUG("padding=%d buff=%p total_bytes=%d\n", padding, seg->buff,
 872                   seg->total_bytes);
 873         return 0;
 874 }
 875
 876 static int _osd_req_finalize_set_attr_list(struct osd_request *or)
 877 {
 878         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
 879         unsigned padding;
 880         int ret;
 881
 882         if (!or->set_attr.total_bytes) {
 883                 cdbh->attrs_list.set_attr_offset = OSD_OFFSET_UNUSED;
 884                 return 0;
 885         }
 886
 887         cdbh->attrs_list.set_attr_bytes = cpu_to_be32(or->set_attr.total_bytes);
 888         cdbh->attrs_list.set_attr_offset =
 889                 osd_req_encode_offset(or, or->out.total_bytes, &padding);
 890
 891         ret = _req_append_segment(or, padding, &or->set_attr,
 892                                   or->out.last_seg, &or->out);
 893         if (ret)
 894                 return ret;
 895
 896         or->out.last_seg = &or->set_attr;
 897         return 0;
 898 }
 899
 900 int osd_req_add_get_attr_list(struct osd_request *or,
 901         const struct osd_attr *oa, unsigned nelem)
 902 {
 903         unsigned total_bytes = or->enc_get_attr.total_bytes;
 904         void *attr_last;
 905         int ret;
 906
 907         if (or->attributes_mode &&
 908             or->attributes_mode != OSD_CDB_GET_SET_ATTR_LISTS) {
 909                 WARN_ON(1);
 910                 return -EINVAL;
 911         }
 912         or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
 913
 914         /* first time calc data-in list header size */
 915         if (!or->get_attr.total_bytes)
 916                 or->get_attr.total_bytes = _osd_req_sizeof_alist_header(or);
 917
 918         /* calc data-out info */
 919         if (!total_bytes) { /* first-time: allocate and put list header */
 920                 unsigned max_bytes;
 921
 922                 total_bytes = _osd_req_sizeof_alist_header(or);
 923                 max_bytes = total_bytes +
 924                         nelem * sizeof(struct osd_attributes_list_attrid);
 925                 ret = _alloc_get_attr_desc(or, max_bytes);
 926                 if (ret)
 927                         return ret;
 928
 929                 _osd_req_set_alist_type(or, or->enc_get_attr.buff,
 930                                         OSD_ATTR_LIST_GET);
 931         }
 932         attr_last = or->enc_get_attr.buff + total_bytes;
 933
 934         for (; nelem; --nelem) {
 935                 struct osd_attributes_list_attrid *attrid;
 936                 const unsigned cur_size = sizeof(*attrid);
 937
 938                 total_bytes += cur_size;
 939                 if (unlikely(or->enc_get_attr.alloc_size < total_bytes)) {
 940                         or->enc_get_attr.total_bytes = total_bytes - cur_size;
 941                         ret = _alloc_get_attr_desc(or,
 942                                         total_bytes + nelem * sizeof(*attrid));
 943                         if (ret)
 944                                 return ret;
 945                         attr_last = or->enc_get_attr.buff +
 946                                 or->enc_get_attr.total_bytes;
 947                 }
 948
 949                 attrid = attr_last;
 950                 attrid->attr_page = cpu_to_be32(oa->attr_page);
 951                 attrid->attr_id = cpu_to_be32(oa->attr_id);
 952
 953                 attr_last += cur_size;
 954
 955                 /* calc data-in size */
 956                 or->get_attr.total_bytes +=
 957                         _osd_req_alist_elem_size(or, oa->len);
 958                 ++oa;
 959         }
 960
 961         or->enc_get_attr.total_bytes = total_bytes;
 962
 963         OSD_DEBUG(
 964                "get_attr.total_bytes=%u(%u) enc_get_attr.total_bytes=%u(%Zu)\n",
 965                or->get_attr.total_bytes,
 966                or->get_attr.total_bytes - _osd_req_sizeof_alist_header(or),
 967                or->enc_get_attr.total_bytes,
 968                (or->enc_get_attr.total_bytes - _osd_req_sizeof_alist_header(or))
 969                         / sizeof(struct osd_attributes_list_attrid));
 970
 971         return 0;
 972 }
 973 EXPORT_SYMBOL(osd_req_add_get_attr_list);
 974
 975 static int _osd_req_finalize_get_attr_list(struct osd_request *or)
 976 {
 977         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
 978         unsigned out_padding;
 979         unsigned in_padding;
 980         int ret;
 981
 982         if (!or->enc_get_attr.total_bytes) {
 983                 cdbh->attrs_list.get_attr_desc_offset = OSD_OFFSET_UNUSED;
 984                 cdbh->attrs_list.get_attr_offset = OSD_OFFSET_UNUSED;
 985                 return 0;
 986         }
 987
 988         ret = _alloc_get_attr_list(or);
 989         if (ret)
 990                 return ret;
 991
 992         /* The out-going buffer info update */
 993         OSD_DEBUG("out-going\n");
 994         cdbh->attrs_list.get_attr_desc_bytes =
 995                 cpu_to_be32(or->enc_get_attr.total_bytes);
 996
 997         cdbh->attrs_list.get_attr_desc_offset =
 998                 osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
 999
1000         ret = _req_append_segment(or, out_padding, &or->enc_get_attr,
1001                                   or->out.last_seg, &or->out);
1002         if (ret)
1003                 return ret;
1004         or->out.last_seg = &or->enc_get_attr;
1005
1006         /* The incoming buffer info update */
1007         OSD_DEBUG("in-coming\n");
1008         cdbh->attrs_list.get_attr_alloc_length =
1009                 cpu_to_be32(or->get_attr.total_bytes);
1010
1011         cdbh->attrs_list.get_attr_offset =
1012                 osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
1013
1014         ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
1015                                   &or->in);
1016         if (ret)
1017                 return ret;
1018         or->in.last_seg = &or->get_attr;
1019
1020         return 0;
1021 }
1022
1023 int osd_req_decode_get_attr_list(struct osd_request *or,
1024         struct osd_attr *oa, int *nelem, void **iterator)
1025 {
1026         unsigned cur_bytes, returned_bytes;
1027         int n;
1028         const unsigned sizeof_attr_list = _osd_req_sizeof_alist_header(or);
1029         void *cur_p;
1030
1031         if (!_osd_req_is_alist_type(or, or->get_attr.buff,
1032                                     OSD_ATTR_LIST_SET_RETRIEVE)) {
1033                 oa->attr_page = 0;
1034                 oa->attr_id = 0;
1035                 oa->val_ptr = NULL;
1036                 oa->len = 0;
1037                 *iterator = NULL;
1038                 return 0;
1039         }
1040
1041         if (*iterator) {
1042                 BUG_ON((*iterator < or->get_attr.buff) ||
1043                      (or->get_attr.buff + or->get_attr.alloc_size < *iterator));
1044                 cur_p = *iterator;
1045                 cur_bytes = (*iterator - or->get_attr.buff) - sizeof_attr_list;
1046                 returned_bytes = or->get_attr.total_bytes;
1047         } else { /* first time decode the list header */
1048                 cur_bytes = sizeof_attr_list;
1049                 returned_bytes = _osd_req_alist_size(or, or->get_attr.buff) +
1050                                         sizeof_attr_list;
1051
1052                 cur_p = or->get_attr.buff + sizeof_attr_list;
1053
1054                 if (returned_bytes > or->get_attr.alloc_size) {
1055                         OSD_DEBUG("target report: space was not big enough! "
1056                                   "Allocate=%u Needed=%u\n",
1057                                   or->get_attr.alloc_size,
1058                                   returned_bytes + sizeof_attr_list);
1059
1060                         returned_bytes =
1061                                 or->get_attr.alloc_size - sizeof_attr_list;
1062                 }
1063                 or->get_attr.total_bytes = returned_bytes;
1064         }
1065
1066         for (n = 0; (n < *nelem) && (cur_bytes < returned_bytes); ++n) {
1067                 struct osd_attributes_list_element *attr = cur_p;
1068                 unsigned inc;
1069
1070                 oa->len = be16_to_cpu(attr->attr_bytes);
1071                 inc = _osd_req_alist_elem_size(or, oa->len);
1072                 OSD_DEBUG("oa->len=%d inc=%d cur_bytes=%d\n",
1073                           oa->len, inc, cur_bytes);
1074                 cur_bytes += inc;
1075                 if (cur_bytes > returned_bytes) {
1076                         OSD_ERR("BAD FOOD from target. list not valid!"
1077                                 "c=%d r=%d n=%d\n",
1078                                 cur_bytes, returned_bytes, n);
1079                         oa->val_ptr = NULL;
1080                         break;
1081                 }
1082
1083                 oa->attr_page = be32_to_cpu(attr->attr_page);
1084                 oa->attr_id = be32_to_cpu(attr->attr_id);
1085                 oa->val_ptr = attr->attr_val;
1086
1087                 cur_p += inc;
1088                 ++oa;
1089         }
1090
1091         *iterator = (returned_bytes - cur_bytes) ? cur_p : NULL;
1092         *nelem = n;
1093         return returned_bytes - cur_bytes;
1094 }
1095 EXPORT_SYMBOL(osd_req_decode_get_attr_list);
1096
1097 /*
1098  * Attributes Page-mode
1099  */
1100
1101 int osd_req_add_get_attr_page(struct osd_request *or,
1102         u32 page_id, void *attar_page, unsigned max_page_len,
1103         const struct osd_attr *set_one_attr)
1104 {
1105         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1106
1107         if (or->attributes_mode &&
1108             or->attributes_mode != OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
1109                 WARN_ON(1);
1110                 return -EINVAL;
1111         }
1112         or->attributes_mode = OSD_CDB_GET_ATTR_PAGE_SET_ONE;
1113
1114         or->get_attr.buff = attar_page;
1115         or->get_attr.total_bytes = max_page_len;
1116
1117         or->set_attr.buff = set_one_attr->val_ptr;
1118         or->set_attr.total_bytes = set_one_attr->len;
1119
1120         cdbh->attrs_page.get_attr_page = cpu_to_be32(page_id);
1121         cdbh->attrs_page.get_attr_alloc_length = cpu_to_be32(max_page_len);
1122         /* ocdb->attrs_page.get_attr_offset; */
1123
1124         cdbh->attrs_page.set_attr_page = cpu_to_be32(set_one_attr->attr_page);
1125         cdbh->attrs_page.set_attr_id = cpu_to_be32(set_one_attr->attr_id);
1126         cdbh->attrs_page.set_attr_length = cpu_to_be32(set_one_attr->len);
1127         /* ocdb->attrs_page.set_attr_offset; */
1128         return 0;
1129 }
1130 EXPORT_SYMBOL(osd_req_add_get_attr_page);
1131
1132 static int _osd_req_finalize_attr_page(struct osd_request *or)
1133 {
1134         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1135         unsigned in_padding, out_padding;
1136         int ret;
1137
1138         /* returned page */
1139         cdbh->attrs_page.get_attr_offset =
1140                 osd_req_encode_offset(or, or->in.total_bytes, &in_padding);
1141
1142         ret = _req_append_segment(or, in_padding, &or->get_attr, NULL,
1143                                   &or->in);
1144         if (ret)
1145                 return ret;
1146
1147         /* set one value */
1148         cdbh->attrs_page.set_attr_offset =
1149                 osd_req_encode_offset(or, or->out.total_bytes, &out_padding);
1150
1151         ret = _req_append_segment(or, out_padding, &or->enc_get_attr, NULL,
1152                                   &or->out);
1153         return ret;
1154 }
1155
1156 static int _osd_req_finalize_data_integrity(struct osd_request *or,
1157         bool has_in, bool has_out, const u8 *cap_key)
1158 {
1159         struct osd_security_parameters *sec_parms = _osd_req_sec_params(or);
1160         int ret;
1161
1162         if (!osd_is_sec_alldata(sec_parms))
1163                 return 0;
1164
1165         if (has_out) {
1166                 struct _osd_req_data_segment seg = {
1167                         .buff = &or->out_data_integ,
1168                         .total_bytes = sizeof(or->out_data_integ),
1169                 };
1170                 unsigned pad;
1171
1172                 or->out_data_integ.data_bytes = cpu_to_be64(
1173                         or->out.bio ? or->out.bio->bi_size : 0);
1174                 or->out_data_integ.set_attributes_bytes = cpu_to_be64(
1175                         or->set_attr.total_bytes);
1176                 or->out_data_integ.get_attributes_bytes = cpu_to_be64(
1177                         or->enc_get_attr.total_bytes);
1178
1179                 sec_parms->data_out_integrity_check_offset =
1180                         osd_req_encode_offset(or, or->out.total_bytes, &pad);
1181
1182                 ret = _req_append_segment(or, pad, &seg, or->out.last_seg,
1183                                           &or->out);
1184                 if (ret)
1185                         return ret;
1186                 or->out.last_seg = NULL;
1187
1188                 /* they are now all chained to request sign them all together */
1189                 osd_sec_sign_data(&or->out_data_integ, or->out.req->bio,
1190                                   cap_key);
1191         }
1192
1193         if (has_in) {
1194                 struct _osd_req_data_segment seg = {
1195                         .buff = &or->in_data_integ,
1196                         .total_bytes = sizeof(or->in_data_integ),
1197                 };
1198                 unsigned pad;
1199
1200                 sec_parms->data_in_integrity_check_offset =
1201                         osd_req_encode_offset(or, or->in.total_bytes, &pad);
1202
1203                 ret = _req_append_segment(or, pad, &seg, or->in.last_seg,
1204                                           &or->in);
1205                 if (ret)
1206                         return ret;
1207
1208                 or->in.last_seg = NULL;
1209         }
1210
1211         return 0;
1212 }
1213
1214 /*
1215  * osd_finalize_request and helpers
1216  */
1217
1218 static int _init_blk_request(struct osd_request *or,
1219         bool has_in, bool has_out)
1220 {
1221         gfp_t flags = or->alloc_flags;
1222         struct scsi_device *scsi_device = or->osd_dev->scsi_device;
1223         struct request_queue *q = scsi_device->request_queue;
1224         struct request *req;
1225         int ret = -ENOMEM;
1226
1227         req = blk_get_request(q, has_out, flags);
1228         if (!req)
1229                 goto out;
1230
1231         or->request = req;
1232         req->cmd_type = REQ_TYPE_BLOCK_PC;
1233         req->timeout = or->timeout;
1234         req->retries = or->retries;
1235         req->sense = or->sense;
1236         req->sense_len = 0;
1237
1238         if (has_out) {
1239                 or->out.req = req;
1240                 if (has_in) {
1241                         /* allocate bidi request */
1242                         req = blk_get_request(q, READ, flags);
1243                         if (!req) {
1244                                 OSD_DEBUG("blk_get_request for bidi failed\n");
1245                                 goto out;
1246                         }
1247                         req->cmd_type = REQ_TYPE_BLOCK_PC;
1248                         or->in.req = or->request->next_rq = req;
1249                 }
1250         } else if (has_in)
1251                 or->in.req = req;
1252
1253         ret = 0;
1254 out:
1255         OSD_DEBUG("or=%p has_in=%d has_out=%d => %d, %p\n",
1256                         or, has_in, has_out, ret, or->request);
1257         return ret;
1258 }
1259
1260 int osd_finalize_request(struct osd_request *or,
1261         u8 options, const void *cap, const u8 *cap_key)
1262 {
1263         struct osd_cdb_head *cdbh = osd_cdb_head(&or->cdb);
1264         bool has_in, has_out;
1265         int ret;
1266
1267         if (options & OSD_REQ_FUA)
1268                 cdbh->options |= OSD_CDB_FUA;
1269
1270         if (options & OSD_REQ_DPO)
1271                 cdbh->options |= OSD_CDB_DPO;
1272
1273         if (options & OSD_REQ_BYPASS_TIMESTAMPS)
1274                 cdbh->timestamp_control = OSD_CDB_BYPASS_TIMESTAMPS;
1275
1276         osd_set_caps(&or->cdb, cap);
1277
1278         has_in = or->in.bio || or->get_attr.total_bytes;
1279         has_out = or->out.bio || or->set_attr.total_bytes ||
1280                 or->enc_get_attr.total_bytes;
1281
1282         ret = _init_blk_request(or, has_in, has_out);
1283         if (ret) {
1284                 OSD_DEBUG("_init_blk_request failed\n");
1285                 return ret;
1286         }
1287
1288         if (or->out.bio) {
1289                 ret = blk_rq_append_bio(or->request->q, or->out.req,
1290                                         or->out.bio);
1291                 if (ret) {
1292                         OSD_DEBUG("blk_rq_append_bio out failed\n");
1293                         return ret;
1294                 }
1295                 OSD_DEBUG("out bytes=%llu (bytes_req=%u)\n",
1296                         _LLU(or->out.total_bytes), or->out.req->data_len);
1297         }
1298         if (or->in.bio) {
1299                 ret = blk_rq_append_bio(or->request->q, or->in.req, or->in.bio);
1300                 if (ret) {
1301                         OSD_DEBUG("blk_rq_append_bio in failed\n");
1302                         return ret;
1303                 }
1304                 OSD_DEBUG("in bytes=%llu (bytes_req=%u)\n",
1305                         _LLU(or->in.total_bytes), or->in.req->data_len);
1306         }
1307
1308         or->out.pad_buff = sg_out_pad_buffer;
1309         or->in.pad_buff = sg_in_pad_buffer;
1310
1311         if (!or->attributes_mode)
1312                 or->attributes_mode = OSD_CDB_GET_SET_ATTR_LISTS;
1313         cdbh->command_specific_options |= or->attributes_mode;
1314         if (or->attributes_mode == OSD_CDB_GET_ATTR_PAGE_SET_ONE) {
1315                 ret = _osd_req_finalize_attr_page(or);
1316         } else {
1317                 /* TODO: I think that for the GET_ATTR command these 2 should
1318                  * be reversed to keep them in execution order (for embeded
1319                  * targets with low memory footprint)
1320                  */
1321                 ret = _osd_req_finalize_set_attr_list(or);
1322                 if (ret) {
1323                         OSD_DEBUG("_osd_req_finalize_set_attr_list failed\n");
1324                         return ret;
1325                 }
1326
1327                 ret = _osd_req_finalize_get_attr_list(or);
1328                 if (ret) {
1329                         OSD_DEBUG("_osd_req_finalize_get_attr_list failed\n");
1330                         return ret;
1331                 }
1332         }
1333
1334         ret = _osd_req_finalize_data_integrity(or, has_in, has_out, cap_key);
1335         if (ret)
1336                 return ret;
1337
1338         osd_sec_sign_cdb(&or->cdb, cap_key);
1339
1340         or->request->cmd = or->cdb.buff;
1341         or->request->cmd_len = _osd_req_cdb_len(or);
1342
1343         return 0;
1344 }
1345 EXPORT_SYMBOL(osd_finalize_request);
1346
1347 #define OSD_SENSE_PRINT1(fmt, a...) \
1348         do { \
1349                 if (__cur_sense_need_output) \
1350                         OSD_ERR(fmt, ##a); \
1351         } while (0)
1352
1353 #define OSD_SENSE_PRINT2(fmt, a...) OSD_SENSE_PRINT1("    " fmt, ##a)
1354
1355 int osd_req_decode_sense_full(struct osd_request *or,
1356         struct osd_sense_info *osi, bool silent,
1357         struct osd_obj_id *bad_obj_list __unused, int max_obj __unused,
1358         struct osd_attr *bad_attr_list, int max_attr)
1359 {
1360         int sense_len, original_sense_len;
1361         struct osd_sense_info local_osi;
1362         struct scsi_sense_descriptor_based *ssdb;
1363         void *cur_descriptor;
1364 #if (CONFIG_SCSI_OSD_DPRINT_SENSE == 0)
1365         const bool __cur_sense_need_output = false;
1366 #else
1367         bool __cur_sense_need_output = !silent;
1368 #endif
1369
1370         if (!or->request->errors)
1371                 return 0;
1372
1373         ssdb = or->request->sense;
1374         sense_len = or->request->sense_len;
1375         if ((sense_len < (int)sizeof(*ssdb) || !ssdb->sense_key)) {
1376                 OSD_ERR("Block-layer returned error(0x%x) but "
1377                         "sense_len(%u) || key(%d) is empty\n",
1378                         or->request->errors, sense_len, ssdb->sense_key);
1379                 return -EIO;
1380         }
1381
1382         if ((ssdb->response_code != 0x72) && (ssdb->response_code != 0x73)) {
1383                 OSD_ERR("Unrecognized scsi sense: rcode=%x length=%d\n",
1384                         ssdb->response_code, sense_len);
1385                 return -EIO;
1386         }
1387
1388         osi = osi ? : &local_osi;
1389         memset(osi, 0, sizeof(*osi));
1390         osi->key = ssdb->sense_key;
1391         osi->additional_code = be16_to_cpu(ssdb->additional_sense_code);
1392         original_sense_len = ssdb->additional_sense_length + 8;
1393
1394 #if (CONFIG_SCSI_OSD_DPRINT_SENSE == 1)
1395         if (__cur_sense_need_output)
1396                 __cur_sense_need_output = (osi->key > scsi_sk_recovered_error);
1397 #endif
1398         OSD_SENSE_PRINT1("Main Sense information key=0x%x length(%d, %d) "
1399                         "additional_code=0x%x\n",
1400                         osi->key, original_sense_len, sense_len,
1401                         osi->additional_code);
1402
1403         if (original_sense_len < sense_len)
1404                 sense_len = original_sense_len;
1405
1406         cur_descriptor = ssdb->ssd;
1407         sense_len -= sizeof(*ssdb);
1408         while (sense_len > 0) {
1409                 struct scsi_sense_descriptor *ssd = cur_descriptor;
1410                 int cur_len = ssd->additional_length + 2;
1411
1412                 sense_len -= cur_len;
1413
1414                 if (sense_len < 0)
1415                         break; /* sense was truncated */
1416
1417                 switch (ssd->descriptor_type) {
1418                 case scsi_sense_information:
1419                 case scsi_sense_command_specific_information:
1420                 {
1421                         struct scsi_sense_command_specific_data_descriptor
1422                                 *sscd = cur_descriptor;
1423
1424                         osi->command_info =
1425                                 get_unaligned_be64(&sscd->information) ;
1426                         OSD_SENSE_PRINT2(
1427                                 "command_specific_information 0x%llx \n",
1428                                 _LLU(osi->command_info));
1429                         break;
1430                 }
1431                 case scsi_sense_key_specific:
1432                 {
1433                         struct scsi_sense_key_specific_data_descriptor
1434                                 *ssks = cur_descriptor;
1435
1436                         osi->sense_info = get_unaligned_be16(&ssks->value);
1437                         OSD_SENSE_PRINT2(
1438                                 "sense_key_specific_information %u"
1439                                 "sksv_cd_bpv_bp (0x%x)\n",
1440                                 osi->sense_info, ssks->sksv_cd_bpv_bp);
1441                         break;
1442                 }
1443                 case osd_sense_object_identification:
1444                 { /*FIXME: Keep first not last, Store in array*/
1445                         struct osd_sense_identification_data_descriptor
1446                                 *osidd = cur_descriptor;
1447
1448                         osi->not_initiated_command_functions =
1449                                 le32_to_cpu(osidd->not_initiated_functions);
1450                         osi->completed_command_functions =
1451                                 le32_to_cpu(osidd->completed_functions);
1452                         osi->obj.partition = be64_to_cpu(osidd->partition_id);
1453                         osi->obj.id = be64_to_cpu(osidd->object_id);
1454                         OSD_SENSE_PRINT2(
1455                                 "object_identification pid=0x%llx oid=0x%llx\n",
1456                                 _LLU(osi->obj.partition), _LLU(osi->obj.id));
1457                         OSD_SENSE_PRINT2(
1458                                 "not_initiated_bits(%x) "
1459                                 "completed_command_bits(%x)\n",
1460                                 osi->not_initiated_command_functions,
1461                                 osi->completed_command_functions);
1462                         break;
1463                 }
1464                 case osd_sense_response_integrity_check:
1465                 {
1466                         struct osd_sense_response_integrity_check_descriptor
1467                                 *osricd = cur_descriptor;
1468                         const unsigned len =
1469                                           sizeof(osricd->integrity_check_value);
1470                         char key_dump[len*4 + 2]; /* 2nibbles+space+ASCII */
1471
1472                         hex_dump_to_buffer(osricd->integrity_check_value, len,
1473                                        32, 1, key_dump, sizeof(key_dump), true);
1474                         OSD_SENSE_PRINT2("response_integrity [%s]\n", key_dump);
1475                 }
1476                 case osd_sense_attribute_identification:
1477                 {
1478                         struct osd_sense_attributes_data_descriptor
1479                                 *osadd = cur_descriptor;
1480                         int len = min(cur_len, sense_len);
1481                         int i = 0;
1482                         struct osd_sense_attr *pattr = osadd->sense_attrs;
1483
1484                         while (len < 0) {
1485                                 u32 attr_page = be32_to_cpu(pattr->attr_page);
1486                                 u32 attr_id = be32_to_cpu(pattr->attr_id);
1487
1488                                 if (i++ == 0) {
1489                                         osi->attr.attr_page = attr_page;
1490                                         osi->attr.attr_id = attr_id;
1491                                 }
1492
1493                                 if (bad_attr_list && max_attr) {
1494                                         bad_attr_list->attr_page = attr_page;
1495                                         bad_attr_list->attr_id = attr_id;
1496                                         bad_attr_list++;
1497                                         max_attr--;
1498                                 }
1499                                 OSD_SENSE_PRINT2(
1500                                         "osd_sense_attribute_identification"
1501                                         "attr_page=0x%x attr_id=0x%x\n",
1502                                         attr_page, attr_id);
1503                         }
1504                 }
1505                 /*These are not legal for OSD*/
1506                 case scsi_sense_field_replaceable_unit:
1507                         OSD_SENSE_PRINT2("scsi_sense_field_replaceable_unit\n");
1508                         break;
1509                 case scsi_sense_stream_commands:
1510                         OSD_SENSE_PRINT2("scsi_sense_stream_commands\n");
1511                         break;
1512                 case scsi_sense_block_commands:
1513                         OSD_SENSE_PRINT2("scsi_sense_block_commands\n");
1514                         break;
1515                 case scsi_sense_ata_return:
1516                         OSD_SENSE_PRINT2("scsi_sense_ata_return\n");
1517                         break;
1518                 default:
1519                         if (ssd->descriptor_type <= scsi_sense_Reserved_last)
1520                                 OSD_SENSE_PRINT2(
1521                                         "scsi_sense Reserved descriptor (0x%x)",
1522                                         ssd->descriptor_type);
1523                         else
1524                                 OSD_SENSE_PRINT2(
1525                                         "scsi_sense Vendor descriptor (0x%x)",
1526                                         ssd->descriptor_type);
1527                 }
1528
1529                 cur_descriptor += cur_len;
1530         }
1531
1532         return (osi->key > scsi_sk_recovered_error) ? -EIO : 0;
1533 }
1534 EXPORT_SYMBOL(osd_req_decode_sense_full);
1535
1536 /*
1537  * Implementation of osd_sec.h API
1538  * TODO: Move to a separate osd_sec.c file at a later stage.
1539  */
1540
1541 enum { OSD_SEC_CAP_V1_ALL_CAPS =
1542         OSD_SEC_CAP_APPEND | OSD_SEC_CAP_OBJ_MGMT | OSD_SEC_CAP_REMOVE   |
1543         OSD_SEC_CAP_CREATE | OSD_SEC_CAP_SET_ATTR | OSD_SEC_CAP_GET_ATTR |
1544         OSD_SEC_CAP_WRITE  | OSD_SEC_CAP_READ     | OSD_SEC_CAP_POL_SEC  |
1545         OSD_SEC_CAP_GLOBAL | OSD_SEC_CAP_DEV_MGMT
1546 };
1547
1548 enum { OSD_SEC_CAP_V2_ALL_CAPS =
1549         OSD_SEC_CAP_V1_ALL_CAPS | OSD_SEC_CAP_QUERY | OSD_SEC_CAP_M_OBJECT
1550 };
1551
1552 void osd_sec_init_nosec_doall_caps(void *caps,
1553         const struct osd_obj_id *obj, bool is_collection, const bool is_v1)
1554 {
1555         struct osd_capability *cap = caps;
1556         u8 type;
1557         u8 descriptor_type;
1558
1559         if (likely(obj->id)) {
1560                 if (unlikely(is_collection)) {
1561                         type = OSD_SEC_OBJ_COLLECTION;
1562                         descriptor_type = is_v1 ? OSD_SEC_OBJ_DESC_OBJ :
1563                                                   OSD_SEC_OBJ_DESC_COL;
1564                 } else {
1565                         type = OSD_SEC_OBJ_USER;
1566                         descriptor_type = OSD_SEC_OBJ_DESC_OBJ;
1567                 }
1568                 WARN_ON(!obj->partition);
1569         } else {
1570                 type = obj->partition ? OSD_SEC_OBJ_PARTITION :
1571                                         OSD_SEC_OBJ_ROOT;
1572                 descriptor_type = OSD_SEC_OBJ_DESC_PAR;
1573         }
1574
1575         memset(cap, 0, sizeof(*cap));
1576
1577         cap->h.format = OSD_SEC_CAP_FORMAT_VER1;
1578         cap->h.integrity_algorithm__key_version = 0; /* MAKE_BYTE(0, 0); */
1579         cap->h.security_method = OSD_SEC_NOSEC;
1580 /*      cap->expiration_time;
1581         cap->AUDIT[30-10];
1582         cap->discriminator[42-30];
1583         cap->object_created_time; */
1584         cap->h.object_type = type;
1585         osd_sec_set_caps(&cap->h, OSD_SEC_CAP_V1_ALL_CAPS);
1586         cap->h.object_descriptor_type = descriptor_type;
1587         cap->od.obj_desc.policy_access_tag = 0;
1588         cap->od.obj_desc.allowed_partition_id = cpu_to_be64(obj->partition);
1589         cap->od.obj_desc.allowed_object_id = cpu_to_be64(obj->id);
1590 }
1591 EXPORT_SYMBOL(osd_sec_init_nosec_doall_caps);
1592
1593 /* FIXME: Extract version from caps pointer.
1594  *        Also Pete's target only supports caps from OSDv1 for now
1595  */
1596 void osd_set_caps(struct osd_cdb *cdb, const void *caps)
1597 {
1598         bool is_ver1 = true;
1599         /* NOTE: They start at same address */
1600         memcpy(&cdb->v1.caps, caps, is_ver1 ? OSDv1_CAP_LEN : OSD_CAP_LEN);
1601 }
1602
1603 bool osd_is_sec_alldata(struct osd_security_parameters *sec_parms __unused)
1604 {
1605         return false;
1606 }
1607
1608 void osd_sec_sign_cdb(struct osd_cdb *ocdb __unused, const u8 *cap_key __unused)
1609 {
1610 }
1611
1612 void osd_sec_sign_data(void *data_integ __unused,
1613                        struct bio *bio __unused, const u8 *cap_key __unused)
1614 {
1615 }
1616
1617 /*
1618  * Declared in osd_protocol.h
1619  * 4.12.5 Data-In and Data-Out buffer offsets
1620  * byte offset = mantissa * (2^(exponent+8))
1621  * Returns the smallest allowed encoded offset that contains given @offset
1622  * The actual encoded offset returned is @offset + *@padding.
1623  */
1624 osd_cdb_offset __osd_encode_offset(
1625         u64 offset, unsigned *padding, int min_shift, int max_shift)
1626 {
1627         u64 try_offset = -1, mod, align;
1628         osd_cdb_offset be32_offset;
1629         int shift;
1630
1631         *padding = 0;
1632         if (!offset)
1633                 return 0;
1634
1635         for (shift = min_shift; shift < max_shift; ++shift) {
1636                 try_offset = offset >> shift;
1637                 if (try_offset < (1 << OSD_OFFSET_MAX_BITS))
1638                         break;
1639         }
1640
1641         BUG_ON(shift == max_shift);
1642
1643         align = 1 << shift;
1644         mod = offset & (align - 1);
1645         if (mod) {
1646                 *padding = align - mod;
1647                 try_offset += 1;
1648         }
1649
1650         try_offset |= ((shift - 8) & 0xf) << 28;
1651         be32_offset = cpu_to_be32((u32)try_offset);
1652
1653         OSD_DEBUG("offset=%llu mantissa=%llu exp=%d encoded=%x pad=%d\n",
1654                  _LLU(offset), _LLU(try_offset & 0x0FFFFFFF), shift,
1655                  be32_offset, *padding);
1656         return be32_offset;
1657 }