sys/cam/cam.c

   1 /*-
   2  * Generic utility routines for the Common Access Method layer.
   3  *
   4  * SPDX-License-Identifier: BSD-2-Clause
   5  *
   6  * Copyright (c) 1997 Justin T. Gibbs.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions, and the following disclaimer,
  14  *    without modification, immediately at the beginning of the file.
  15  * 2. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  22  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <sys/param.h>
  35 #ifdef _KERNEL
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #include <sys/sysctl.h>
  39 #else /* _KERNEL */
  40 #include <stdlib.h>
  41 #include <stdio.h>
  42 #include <string.h>
  43 #include <camlib.h>
  44 #endif /* _KERNEL */
  45
  46 #include <cam/cam.h>
  47 #include <cam/cam_ccb.h>
  48 #include <cam/scsi/scsi_all.h>
  49 #include <cam/scsi/smp_all.h>
  50 #include <sys/sbuf.h>
  51
  52 #ifdef _KERNEL
  53 #include <sys/libkern.h>
  54 #include <cam/cam_queue.h>
  55 #include <cam/cam_xpt.h>
  56
  57 FEATURE(scbus, "SCSI devices support");
  58
  59 #endif
  60
  61 static int      camstatusentrycomp(const void *key, const void *member);
  62
  63 const struct cam_status_entry cam_status_table[] = {
  64         { CAM_REQ_INPROG,        "CCB request is in progress"                },
  65         { CAM_REQ_CMP,           "CCB request completed without error"       },
  66         { CAM_REQ_ABORTED,       "CCB request aborted by the host"           },
  67         { CAM_UA_ABORT,          "Unable to abort CCB request"               },
  68         { CAM_REQ_CMP_ERR,       "CCB request completed with an error"       },
  69         { CAM_BUSY,              "CAM subsystem is busy"                     },
  70         { CAM_REQ_INVALID,       "CCB request was invalid"                   },
  71         { CAM_PATH_INVALID,      "Supplied Path ID is invalid"               },
  72         { CAM_DEV_NOT_THERE,     "Device Not Present"                        },
  73         { CAM_UA_TERMIO,         "Unable to terminate I/O CCB request"       },
  74         { CAM_SEL_TIMEOUT,       "Selection Timeout"                         },
  75         { CAM_CMD_TIMEOUT,       "Command timeout"                           },
  76         { CAM_SCSI_STATUS_ERROR, "SCSI Status Error"                         },
  77         { CAM_MSG_REJECT_REC,    "Message Reject Reveived"                   },
  78         { CAM_SCSI_BUS_RESET,    "SCSI Bus Reset Sent/Received"              },
  79         { CAM_UNCOR_PARITY,      "Uncorrectable parity/CRC error"            },
  80         { CAM_AUTOSENSE_FAIL,    "Auto-Sense Retrieval Failed"               },
  81         { CAM_NO_HBA,            "No HBA Detected"                           },
  82         { CAM_DATA_RUN_ERR,      "Data Overrun error"                        },
  83         { CAM_UNEXP_BUSFREE,     "Unexpected Bus Free"                       },
  84         { CAM_SEQUENCE_FAIL,     "Target Bus Phase Sequence Failure"         },
  85         { CAM_CCB_LEN_ERR,       "CCB length supplied is inadequate"         },
  86         { CAM_PROVIDE_FAIL,      "Unable to provide requested capability"    },
  87         { CAM_BDR_SENT,          "SCSI BDR Message Sent"                     },
  88         { CAM_REQ_TERMIO,        "CCB request terminated by the host"        },
  89         { CAM_UNREC_HBA_ERROR,   "Unrecoverable Host Bus Adapter Error"      },
  90         { CAM_REQ_TOO_BIG,       "The request was too large for this host"   },
  91         { CAM_REQUEUE_REQ,       "Unconditionally Re-queue Request",         },
  92         { CAM_ATA_STATUS_ERROR,  "ATA Status Error"                          },
  93         { CAM_SCSI_IT_NEXUS_LOST,"Initiator/Target Nexus Lost"               },
  94         { CAM_SMP_STATUS_ERROR,  "SMP Status Error"                          },
  95         { CAM_IDE,               "Initiator Detected Error Message Received" },
  96         { CAM_RESRC_UNAVAIL,     "Resource Unavailable"                      },
  97         { CAM_UNACKED_EVENT,     "Unacknowledged Event by Host"              },
  98         { CAM_MESSAGE_RECV,      "Message Received in Host Target Mode"      },
  99         { CAM_INVALID_CDB,       "Invalid CDB received in Host Target Mode"  },
 100         { CAM_LUN_INVALID,       "Invalid Lun"                               },
 101         { CAM_TID_INVALID,       "Invalid Target ID"                         },
 102         { CAM_FUNC_NOTAVAIL,     "Function Not Available"                    },
 103         { CAM_NO_NEXUS,          "Nexus Not Established"                     },
 104         { CAM_IID_INVALID,       "Invalid Initiator ID"                      },
 105         { CAM_CDB_RECVD,         "CDB Received"                              },
 106         { CAM_LUN_ALRDY_ENA,     "LUN Already Enabled for Target Mode"       },
 107         { CAM_SCSI_BUSY,         "SCSI Bus Busy"                             },
 108 };
 109
 110 #ifdef _KERNEL
 111 SYSCTL_NODE(_kern, OID_AUTO, cam, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
 112     "CAM Subsystem");
 113
 114 #ifndef CAM_DEFAULT_SORT_IO_QUEUES
 115 #define CAM_DEFAULT_SORT_IO_QUEUES 1
 116 #endif
 117
 118 int cam_sort_io_queues = CAM_DEFAULT_SORT_IO_QUEUES;
 119 SYSCTL_INT(_kern_cam, OID_AUTO, sort_io_queues, CTLFLAG_RWTUN,
 120     &cam_sort_io_queues, 0, "Sort IO queues to try and optimise disk access patterns");
 121 #endif
 122
 123 void
 124 cam_strvis(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen)
 125 {
 126         cam_strvis_flag(dst, src, srclen, dstlen,
 127             CAM_STRVIS_FLAG_NONASCII_ESC);
 128 }
 129
 130 void
 131 cam_strvis_flag(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen,
 132                 uint32_t flags)
 133 {
 134         struct sbuf sb;
 135
 136         sbuf_new(&sb, dst, dstlen, SBUF_FIXEDLEN);
 137         cam_strvis_sbuf(&sb, src, srclen, flags);
 138         sbuf_finish(&sb);
 139 }
 140
 141 void
 142 cam_strvis_sbuf(struct sbuf *sb, const u_int8_t *src, int srclen,
 143                 uint32_t flags)
 144 {
 145
 146         /* Trim leading/trailing spaces, nulls. */
 147         while (srclen > 0 && src[0] == ' ')
 148                 src++, srclen--;
 149         while (srclen > 0
 150             && (src[srclen-1] == ' ' || src[srclen-1] == '\0'))
 151                 srclen--;
 152
 153         while (srclen > 0) {
 154                 if (*src < 0x20 || *src >= 0x80) {
 155                         /* SCSI-II Specifies that these should never occur. */
 156                         /* non-printable character */
 157                         switch (flags & CAM_STRVIS_FLAG_NONASCII_MASK) {
 158                         case CAM_STRVIS_FLAG_NONASCII_ESC:
 159                                 sbuf_printf(sb, "\\%c%c%c",
 160                                     ((*src & 0300) >> 6) + '0',
 161                                     ((*src & 0070) >> 3) + '0',
 162                                     ((*src & 0007) >> 0) + '0');
 163                                 break;
 164                         case CAM_STRVIS_FLAG_NONASCII_RAW:
 165                                 /*
 166                                  * If we run into a NUL, just transform it
 167                                  * into a space.
 168                                  */
 169                                 if (*src != 0x00)
 170                                         sbuf_putc(sb, *src);
 171                                 else
 172                                         sbuf_putc(sb, ' ');
 173                                 break;
 174                         case CAM_STRVIS_FLAG_NONASCII_SPC:
 175                                 sbuf_putc(sb, ' ');
 176                                 break;
 177                         case CAM_STRVIS_FLAG_NONASCII_TRIM:
 178                         default:
 179                                 break;
 180                         }
 181                 } else {
 182                         /* normal character */
 183                         sbuf_putc(sb, *src);
 184                 }
 185                 src++;
 186                 srclen--;
 187         }
 188 }
 189
 190 /*
 191  * Compare string with pattern, returning 0 on match.
 192  * Short pattern matches trailing blanks in name,
 193  * Shell globbing rules apply: * matches 0 or more characters,
 194  * ? matchces one character, [...] denotes a set to match one char,
 195  * [^...] denotes a complimented set to match one character.
 196  * Spaces in str used to match anything in the pattern string
 197  * but was removed because it's a bug. No current patterns require
 198  * it, as far as I know, but it's impossible to know what drives
 199  * returned.
 200  *
 201  * Each '*' generates recursion, so keep the number of * in check.
 202  */
 203 int
 204 cam_strmatch(const u_int8_t *str, const u_int8_t *pattern, int str_len)
 205 {
 206
 207         while (*pattern != '\0' && str_len > 0) {
 208                 if (*pattern == '*') {
 209                         pattern++;
 210                         if (*pattern == '\0')
 211                                 return (0);
 212                         do {
 213                                 if (cam_strmatch(str, pattern, str_len) == 0)
 214                                         return (0);
 215                                 str++;
 216                                 str_len--;
 217                         } while (str_len > 0);
 218                         return (1);
 219                 } else if (*pattern == '[') {
 220                         int negate_range, ok;
 221                         uint8_t pc = UCHAR_MAX;
 222                         uint8_t sc;
 223
 224                         ok = 0;
 225                         sc = *str++;
 226                         str_len--;
 227                         pattern++;
 228                         if ((negate_range = (*pattern == '^')) != 0)
 229                                 pattern++;
 230                         while ((*pattern != ']') && *pattern != '\0') {
 231                                 if (*pattern == '-') {
 232                                         if (pattern[1] == '\0') /* Bad pattern */
 233                                                 return (1);
 234                                         if (sc >= pc && sc <= pattern[1])
 235                                                 ok = 1;
 236                                         pattern++;
 237                                 } else if (*pattern == sc)
 238                                         ok = 1;
 239                                 pc = *pattern;
 240                                 pattern++;
 241                         }
 242                         if (ok == negate_range)
 243                                 return (1);
 244                         pattern++;
 245                 } else if (*pattern == '?') {
 246                         /*
 247                          * NB: || *str == ' ' of the old code is a bug and was
 248                          * removed.  If you add it back, keep this the last if
 249                          * before the naked else */
 250                         pattern++;
 251                         str++;
 252                         str_len--;
 253                 } else {
 254                         if (*str != *pattern)
 255                                 return (1);
 256                         pattern++;
 257                         str++;
 258                         str_len--;
 259                 }
 260         }
 261
 262         /* '*' is allowed to match nothing, so gobble it */
 263         while (*pattern == '*')
 264                 pattern++;
 265
 266         if ( *pattern != '\0') {
 267                 /* Pattern not fully consumed.  Not a match */
 268                 return (1);
 269         }
 270
 271         /* Eat trailing spaces, which get added by SAT */
 272         while (str_len > 0 && *str == ' ') {
 273                 str++;
 274                 str_len--;
 275         }
 276
 277         return (str_len);
 278 }
 279
 280 caddr_t
 281 cam_quirkmatch(caddr_t target, caddr_t quirk_table, int num_entries,
 282                int entry_size, cam_quirkmatch_t *comp_func)
 283 {
 284         for (; num_entries > 0; num_entries--, quirk_table += entry_size) {
 285                 if ((*comp_func)(target, quirk_table) == 0)
 286                         return (quirk_table);
 287         }
 288         return (NULL);
 289 }
 290
 291 const struct cam_status_entry*
 292 cam_fetch_status_entry(cam_status status)
 293 {
 294         status &= CAM_STATUS_MASK;
 295         return (bsearch(&status, &cam_status_table,
 296                         nitems(cam_status_table),
 297                         sizeof(*cam_status_table),
 298                         camstatusentrycomp));
 299 }
 300
 301 static int
 302 camstatusentrycomp(const void *key, const void *member)
 303 {
 304         cam_status status;
 305         const struct cam_status_entry *table_entry;
 306
 307         status = *(const cam_status *)key;
 308         table_entry = (const struct cam_status_entry *)member;
 309
 310         return (status - table_entry->status_code);
 311 }
 312
 313 #ifdef _KERNEL
 314 char *
 315 cam_error_string(union ccb *ccb, char *str, int str_len,
 316                  cam_error_string_flags flags,
 317                  cam_error_proto_flags proto_flags)
 318 #else /* !_KERNEL */
 319 char *
 320 cam_error_string(struct cam_device *device, union ccb *ccb, char *str,
 321                  int str_len, cam_error_string_flags flags,
 322                  cam_error_proto_flags proto_flags)
 323 #endif /* _KERNEL/!_KERNEL */
 324 {
 325         char path_str[64];
 326         struct sbuf sb;
 327
 328         if ((ccb == NULL)
 329          || (str == NULL)
 330          || (str_len <= 0))
 331                 return(NULL);
 332
 333         if (flags == CAM_ESF_NONE)
 334                 return(NULL);
 335
 336         switch (ccb->ccb_h.func_code) {
 337                 case XPT_ATA_IO:
 338                         switch (proto_flags & CAM_EPF_LEVEL_MASK) {
 339                         case CAM_EPF_NONE:
 340                                 break;
 341                         case CAM_EPF_ALL:
 342                         case CAM_EPF_NORMAL:
 343                                 proto_flags |= CAM_EAF_PRINT_RESULT;
 344                                 /* FALLTHROUGH */
 345                         case CAM_EPF_MINIMAL:
 346                                 proto_flags |= CAM_EAF_PRINT_STATUS;
 347                                 /* FALLTHROUGH */
 348                         default:
 349                                 break;
 350                         }
 351                         break;
 352                 case XPT_SCSI_IO:
 353                         switch (proto_flags & CAM_EPF_LEVEL_MASK) {
 354                         case CAM_EPF_NONE:
 355                                 break;
 356                         case CAM_EPF_ALL:
 357                         case CAM_EPF_NORMAL:
 358                                 proto_flags |= CAM_ESF_PRINT_SENSE;
 359                                 /* FALLTHROUGH */
 360                         case CAM_EPF_MINIMAL:
 361                                 proto_flags |= CAM_ESF_PRINT_STATUS;
 362                                 /* FALLTHROUGH */
 363                         default:
 364                                 break;
 365                         }
 366                         break;
 367                 case XPT_SMP_IO:
 368                         switch (proto_flags & CAM_EPF_LEVEL_MASK) {
 369                         case CAM_EPF_NONE:
 370                                 break;
 371                         case CAM_EPF_ALL:
 372                                 proto_flags |= CAM_ESMF_PRINT_FULL_CMD;
 373                                 /* FALLTHROUGH */
 374                         case CAM_EPF_NORMAL:
 375                         case CAM_EPF_MINIMAL:
 376                                 proto_flags |= CAM_ESMF_PRINT_STATUS;
 377                                 /* FALLTHROUGH */
 378                         default:
 379                                 break;
 380                         }
 381                         break;
 382                 default:
 383                         break;
 384         }
 385 #ifdef _KERNEL
 386         xpt_path_string(ccb->csio.ccb_h.path, path_str, sizeof(path_str));
 387 #else /* !_KERNEL */
 388         cam_path_string(device, path_str, sizeof(path_str));
 389 #endif /* _KERNEL/!_KERNEL */
 390
 391         sbuf_new(&sb, str, str_len, 0);
 392
 393         if (flags & CAM_ESF_COMMAND) {
 394                 sbuf_cat(&sb, path_str);
 395                 switch (ccb->ccb_h.func_code) {
 396                 case XPT_ATA_IO:
 397                         ata_command_sbuf(&ccb->ataio, &sb);
 398                         break;
 399                 case XPT_SCSI_IO:
 400 #ifdef _KERNEL
 401                         scsi_command_string(&ccb->csio, &sb);
 402 #else /* !_KERNEL */
 403                         scsi_command_string(device, &ccb->csio, &sb);
 404 #endif /* _KERNEL/!_KERNEL */
 405                         break;
 406                 case XPT_SMP_IO:
 407                         smp_command_sbuf(&ccb->smpio, &sb, path_str, 79 -
 408                                          strlen(path_str), (proto_flags &
 409                                          CAM_ESMF_PRINT_FULL_CMD) ? 79 : 0);
 410                         break;
 411                 case XPT_NVME_IO:
 412                 case XPT_NVME_ADMIN:
 413                         nvme_command_sbuf(&ccb->nvmeio, &sb);
 414                         break;
 415                 default:
 416                         sbuf_printf(&sb, "CAM func %#x",
 417                             ccb->ccb_h.func_code);
 418                         break;
 419                 }
 420                 sbuf_printf(&sb, "\n");
 421         }
 422
 423         if (flags & CAM_ESF_CAM_STATUS) {
 424                 cam_status status;
 425                 const struct cam_status_entry *entry;
 426
 427                 sbuf_cat(&sb, path_str);
 428
 429                 status = ccb->ccb_h.status & CAM_STATUS_MASK;
 430
 431                 entry = cam_fetch_status_entry(status);
 432
 433                 if (entry == NULL)
 434                         sbuf_printf(&sb, "CAM status: Unknown (%#x)\n",
 435                                     ccb->ccb_h.status);
 436                 else
 437                         sbuf_printf(&sb, "CAM status: %s\n",
 438                                     entry->status_text);
 439         }
 440
 441         if (flags & CAM_ESF_PROTO_STATUS) {
 442
 443                 switch (ccb->ccb_h.func_code) {
 444                 case XPT_ATA_IO:
 445                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) !=
 446                              CAM_ATA_STATUS_ERROR)
 447                                 break;
 448                         if (proto_flags & CAM_EAF_PRINT_STATUS) {
 449                                 sbuf_cat(&sb, path_str);
 450                                 ata_status_sbuf(&ccb->ataio, &sb);
 451                                 sbuf_printf(&sb, "\n");
 452                         }
 453                         if (proto_flags & CAM_EAF_PRINT_RESULT) {
 454                                 sbuf_cat(&sb, path_str);
 455                                 sbuf_printf(&sb, "RES: ");
 456                                 ata_res_sbuf(&ccb->ataio.res, &sb);
 457                                 sbuf_printf(&sb, "\n");
 458                         }
 459
 460                         break;
 461                 case XPT_SCSI_IO:
 462                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) !=
 463                              CAM_SCSI_STATUS_ERROR)
 464                                 break;
 465
 466                         if (proto_flags & CAM_ESF_PRINT_STATUS) {
 467                                 sbuf_cat(&sb, path_str);
 468                                 sbuf_printf(&sb, "SCSI status: %s\n",
 469                                             scsi_status_string(&ccb->csio));
 470                         }
 471
 472                         if ((proto_flags & CAM_ESF_PRINT_SENSE)
 473                          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
 474                          && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)) {
 475 #ifdef _KERNEL
 476                                 scsi_sense_sbuf(&ccb->csio, &sb,
 477                                                 SSS_FLAG_NONE);
 478 #else /* !_KERNEL */
 479                                 scsi_sense_sbuf(device, &ccb->csio, &sb,
 480                                                 SSS_FLAG_NONE);
 481 #endif /* _KERNEL/!_KERNEL */
 482                         }
 483                         break;
 484                 case XPT_SMP_IO:
 485                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) !=
 486                              CAM_SMP_STATUS_ERROR)
 487                                 break;
 488
 489                         if (proto_flags & CAM_ESF_PRINT_STATUS) {
 490                                 sbuf_cat(&sb, path_str);
 491                                 sbuf_printf(&sb, "SMP status: %s (%#x)\n",
 492                                     smp_error_desc(ccb->smpio.smp_response[2]),
 493                                                    ccb->smpio.smp_response[2]);
 494                         }
 495                         /* There is no SMP equivalent to SCSI sense. */
 496                         break;
 497                 default:
 498                         break;
 499                 }
 500         }
 501
 502         sbuf_finish(&sb);
 503
 504         return(sbuf_data(&sb));
 505 }
 506
 507 #ifdef _KERNEL
 508
 509 void
 510 cam_error_print(union ccb *ccb, cam_error_string_flags flags,
 511                 cam_error_proto_flags proto_flags)
 512 {
 513         char str[512];
 514
 515         printf("%s", cam_error_string(ccb, str, sizeof(str), flags,
 516                proto_flags));
 517 }
 518
 519 #else /* !_KERNEL */
 520
 521 void
 522 cam_error_print(struct cam_device *device, union ccb *ccb,
 523                 cam_error_string_flags flags, cam_error_proto_flags proto_flags,
 524                 FILE *ofile)
 525 {
 526         char str[512];
 527
 528         if ((device == NULL) || (ccb == NULL) || (ofile == NULL))
 529                 return;
 530
 531         fprintf(ofile, "%s", cam_error_string(device, ccb, str, sizeof(str),
 532                 flags, proto_flags));
 533 }
 534
 535 #endif /* _KERNEL/!_KERNEL */
 536
 537 /*
 538  * Common calculate geometry fuction
 539  *
 540  * Caller should set ccg->volume_size and block_size.
 541  * The extended parameter should be zero if extended translation
 542  * should not be used.
 543  */
 544 void
 545 cam_calc_geometry(struct ccb_calc_geometry *ccg, int extended)
 546 {
 547         uint32_t size_mb, secs_per_cylinder;
 548
 549         if (ccg->block_size == 0) {
 550                 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
 551                 return;
 552         }
 553         size_mb = (1024L * 1024L) / ccg->block_size;
 554         if (size_mb == 0) {
 555                 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
 556                 return;
 557         }
 558         size_mb = ccg->volume_size / size_mb;
 559         if (size_mb > 1024 && extended) {
 560                 ccg->heads = 255;
 561                 ccg->secs_per_track = 63;
 562         } else {
 563                 ccg->heads = 64;
 564                 ccg->secs_per_track = 32;
 565         }
 566         secs_per_cylinder = ccg->heads * ccg->secs_per_track;
 567         if (secs_per_cylinder == 0) {
 568                 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
 569                 return;
 570         }
 571         ccg->cylinders = ccg->volume_size / secs_per_cylinder;
 572         ccg->ccb_h.status = CAM_REQ_CMP;
 573 }