The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/cam/cam.c

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    1 /*-
    2  * Generic utility routines for the Common Access Method layer.
    3  *
    4  * Copyright (c) 1997 Justin T. Gibbs.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions, and the following disclaimer,
   12  *    without modification, immediately at the beginning of the file.
   13  * 2. The name of the author may not be used to endorse or promote products
   14  *    derived from this software without specific prior written permission.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   20  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/10.2/sys/cam/cam.c 284435 2015-06-16 02:31:11Z ken $");
   31 
   32 #include <sys/param.h>
   33 #ifdef _KERNEL
   34 #include <sys/systm.h>
   35 #include <sys/kernel.h>
   36 #include <sys/sysctl.h>
   37 #else /* _KERNEL */
   38 #include <stdlib.h>
   39 #include <stdio.h>
   40 #include <string.h>
   41 #include <camlib.h>
   42 #endif /* _KERNEL */
   43 
   44 #include <cam/cam.h>
   45 #include <cam/cam_ccb.h>
   46 #include <cam/scsi/scsi_all.h>
   47 #include <cam/scsi/smp_all.h>
   48 #include <sys/sbuf.h>
   49 
   50 #ifdef _KERNEL
   51 #include <sys/libkern.h>
   52 #include <cam/cam_queue.h>
   53 #include <cam/cam_xpt.h>
   54 
   55 FEATURE(scbus, "SCSI devices support");
   56 
   57 #endif
   58 
   59 static int      camstatusentrycomp(const void *key, const void *member);
   60 
   61 const struct cam_status_entry cam_status_table[] = {
   62         { CAM_REQ_INPROG,        "CCB request is in progress"                },
   63         { CAM_REQ_CMP,           "CCB request completed without error"       },
   64         { CAM_REQ_ABORTED,       "CCB request aborted by the host"           },
   65         { CAM_UA_ABORT,          "Unable to abort CCB request"               },
   66         { CAM_REQ_CMP_ERR,       "CCB request completed with an error"       },
   67         { CAM_BUSY,              "CAM subsystem is busy"                     },
   68         { CAM_REQ_INVALID,       "CCB request was invalid"                   },
   69         { CAM_PATH_INVALID,      "Supplied Path ID is invalid"               },
   70         { CAM_DEV_NOT_THERE,     "Device Not Present"                        },
   71         { CAM_UA_TERMIO,         "Unable to terminate I/O CCB request"       },
   72         { CAM_SEL_TIMEOUT,       "Selection Timeout"                         },
   73         { CAM_CMD_TIMEOUT,       "Command timeout"                           },
   74         { CAM_SCSI_STATUS_ERROR, "SCSI Status Error"                         },
   75         { CAM_MSG_REJECT_REC,    "Message Reject Reveived"                   },
   76         { CAM_SCSI_BUS_RESET,    "SCSI Bus Reset Sent/Received"              },
   77         { CAM_UNCOR_PARITY,      "Uncorrectable parity/CRC error"            },
   78         { CAM_AUTOSENSE_FAIL,    "Auto-Sense Retrieval Failed"               },
   79         { CAM_NO_HBA,            "No HBA Detected"                           },
   80         { CAM_DATA_RUN_ERR,      "Data Overrun error"                        },
   81         { CAM_UNEXP_BUSFREE,     "Unexpected Bus Free"                       },
   82         { CAM_SEQUENCE_FAIL,     "Target Bus Phase Sequence Failure"         },
   83         { CAM_CCB_LEN_ERR,       "CCB length supplied is inadequate"         },
   84         { CAM_PROVIDE_FAIL,      "Unable to provide requested capability"    },
   85         { CAM_BDR_SENT,          "SCSI BDR Message Sent"                     },
   86         { CAM_REQ_TERMIO,        "CCB request terminated by the host"        },
   87         { CAM_UNREC_HBA_ERROR,   "Unrecoverable Host Bus Adapter Error"      },
   88         { CAM_REQ_TOO_BIG,       "The request was too large for this host"   },
   89         { CAM_REQUEUE_REQ,       "Unconditionally Re-queue Request",         },
   90         { CAM_ATA_STATUS_ERROR,  "ATA Status Error"                          },
   91         { CAM_SCSI_IT_NEXUS_LOST,"Initiator/Target Nexus Lost"               },
   92         { CAM_SMP_STATUS_ERROR,  "SMP Status Error"                          },
   93         { CAM_IDE,               "Initiator Detected Error Message Received" },
   94         { CAM_RESRC_UNAVAIL,     "Resource Unavailable"                      },
   95         { CAM_UNACKED_EVENT,     "Unacknowledged Event by Host"              },
   96         { CAM_MESSAGE_RECV,      "Message Received in Host Target Mode"      },
   97         { CAM_INVALID_CDB,       "Invalid CDB received in Host Target Mode"  },
   98         { CAM_LUN_INVALID,       "Invalid Lun"                               },
   99         { CAM_TID_INVALID,       "Invalid Target ID"                         },
  100         { CAM_FUNC_NOTAVAIL,     "Function Not Available"                    },
  101         { CAM_NO_NEXUS,          "Nexus Not Established"                     },
  102         { CAM_IID_INVALID,       "Invalid Initiator ID"                      },
  103         { CAM_CDB_RECVD,         "CDB Received"                              },
  104         { CAM_LUN_ALRDY_ENA,     "LUN Already Enabled for Target Mode"       },
  105         { CAM_SCSI_BUSY,         "SCSI Bus Busy"                             },
  106 };
  107 
  108 const int num_cam_status_entries =
  109     sizeof(cam_status_table)/sizeof(*cam_status_table);
  110 
  111 #ifdef _KERNEL
  112 SYSCTL_NODE(_kern, OID_AUTO, cam, CTLFLAG_RD, 0, "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 TUNABLE_INT("kern.cam.sort_io_queues", &cam_sort_io_queues);
  120 SYSCTL_INT(_kern_cam, OID_AUTO, sort_io_queues, CTLFLAG_RWTUN,
  121     &cam_sort_io_queues, 0, "Sort IO queues to try and optimise disk access patterns");
  122 #endif
  123 
  124 void
  125 cam_strvis(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen)
  126 {
  127 
  128         /* Trim leading/trailing spaces, nulls. */
  129         while (srclen > 0 && src[0] == ' ')
  130                 src++, srclen--;
  131         while (srclen > 0
  132             && (src[srclen-1] == ' ' || src[srclen-1] == '\0'))
  133                 srclen--;
  134 
  135         while (srclen > 0 && dstlen > 1) {
  136                 u_int8_t *cur_pos = dst;
  137 
  138                 if (*src < 0x20 || *src >= 0x80) {
  139                         /* SCSI-II Specifies that these should never occur. */
  140                         /* non-printable character */
  141                         if (dstlen > 4) {
  142                                 *cur_pos++ = '\\';
  143                                 *cur_pos++ = ((*src & 0300) >> 6) + '';
  144                                 *cur_pos++ = ((*src & 0070) >> 3) + '';
  145                                 *cur_pos++ = ((*src & 0007) >> 0) + '';
  146                         } else {
  147                                 *cur_pos++ = '?';
  148                         }
  149                 } else {
  150                         /* normal character */
  151                         *cur_pos++ = *src;
  152                 }
  153                 src++;
  154                 srclen--;
  155                 dstlen -= cur_pos - dst;
  156                 dst = cur_pos;
  157         }
  158         *dst = '\0';
  159 }
  160 
  161 void
  162 cam_strvis_sbuf(struct sbuf *sb, const u_int8_t *src, int srclen,
  163                 uint32_t flags)
  164 {
  165 
  166         /* Trim leading/trailing spaces, nulls. */
  167         while (srclen > 0 && src[0] == ' ')
  168                 src++, srclen--;
  169         while (srclen > 0
  170             && (src[srclen-1] == ' ' || src[srclen-1] == '\0'))
  171                 srclen--;
  172 
  173         while (srclen > 0) {
  174                 if (*src < 0x20 || *src >= 0x80) {
  175                         /* SCSI-II Specifies that these should never occur. */
  176                         /* non-printable character */
  177                         switch (flags & CAM_STRVIS_FLAG_NONASCII_MASK) {
  178                         case CAM_STRVIS_FLAG_NONASCII_ESC:
  179                                 sbuf_printf(sb, "\\%c%c%c", 
  180                                     ((*src & 0300) >> 6) + '',
  181                                     ((*src & 0070) >> 3) + '',
  182                                     ((*src & 0007) >> 0) + '');
  183                                 break;
  184                         case CAM_STRVIS_FLAG_NONASCII_RAW:
  185                                 /*
  186                                  * If we run into a NUL, just transform it
  187                                  * into a space.
  188                                  */
  189                                 if (*src != 0x00)
  190                                         sbuf_putc(sb, *src);
  191                                 else
  192                                         sbuf_putc(sb, ' ');
  193                                 break;
  194                         case CAM_STRVIS_FLAG_NONASCII_SPC:
  195                                 sbuf_putc(sb, ' ');
  196                                 break;
  197                         case CAM_STRVIS_FLAG_NONASCII_TRIM:
  198                         default:
  199                                 break;
  200                         }
  201                 } else {
  202                         /* normal character */
  203                         sbuf_putc(sb, *src);
  204                 }
  205                 src++;
  206                 srclen--;
  207         }
  208 }
  209 
  210 
  211 /*
  212  * Compare string with pattern, returning 0 on match.
  213  * Short pattern matches trailing blanks in name,
  214  * wildcard '*' in pattern matches rest of name,
  215  * wildcard '?' matches a single non-space character.
  216  */
  217 int
  218 cam_strmatch(const u_int8_t *str, const u_int8_t *pattern, int str_len)
  219 {
  220 
  221         while (*pattern != '\0'&& str_len > 0) {  
  222 
  223                 if (*pattern == '*') {
  224                         return (0);
  225                 }
  226                 if ((*pattern != *str)
  227                  && (*pattern != '?' || *str == ' ')) {
  228                         return (1);
  229                 }
  230                 pattern++;
  231                 str++;
  232                 str_len--;
  233         }
  234         while (str_len > 0 && *str == ' ') {
  235                 str++;
  236                 str_len--;
  237         }
  238         if (str_len > 0 && *str == 0)
  239                 str_len = 0;
  240 
  241         return (str_len);
  242 }
  243 
  244 caddr_t
  245 cam_quirkmatch(caddr_t target, caddr_t quirk_table, int num_entries,
  246                int entry_size, cam_quirkmatch_t *comp_func)
  247 {
  248         for (; num_entries > 0; num_entries--, quirk_table += entry_size) {
  249                 if ((*comp_func)(target, quirk_table) == 0)
  250                         return (quirk_table);
  251         }
  252         return (NULL);
  253 }
  254 
  255 const struct cam_status_entry*
  256 cam_fetch_status_entry(cam_status status)
  257 {
  258         status &= CAM_STATUS_MASK;
  259         return (bsearch(&status, &cam_status_table,
  260                         num_cam_status_entries,
  261                         sizeof(*cam_status_table),
  262                         camstatusentrycomp));
  263 }
  264 
  265 static int
  266 camstatusentrycomp(const void *key, const void *member)
  267 {
  268         cam_status status;
  269         const struct cam_status_entry *table_entry;
  270 
  271         status = *(const cam_status *)key;
  272         table_entry = (const struct cam_status_entry *)member;
  273 
  274         return (status - table_entry->status_code);
  275 }
  276 
  277 
  278 #ifdef _KERNEL
  279 char *
  280 cam_error_string(union ccb *ccb, char *str, int str_len,
  281                  cam_error_string_flags flags,
  282                  cam_error_proto_flags proto_flags)
  283 #else /* !_KERNEL */
  284 char *
  285 cam_error_string(struct cam_device *device, union ccb *ccb, char *str,
  286                  int str_len, cam_error_string_flags flags,
  287                  cam_error_proto_flags proto_flags)
  288 #endif /* _KERNEL/!_KERNEL */
  289 {
  290         char path_str[64];
  291         struct sbuf sb;
  292 
  293         if ((ccb == NULL)
  294          || (str == NULL)
  295          || (str_len <= 0))
  296                 return(NULL);
  297 
  298         if (flags == CAM_ESF_NONE)
  299                 return(NULL);
  300 
  301         switch (ccb->ccb_h.func_code) {
  302                 case XPT_ATA_IO:
  303                         switch (proto_flags & CAM_EPF_LEVEL_MASK) {
  304                         case CAM_EPF_NONE:
  305                                 break;
  306                         case CAM_EPF_ALL:
  307                         case CAM_EPF_NORMAL:
  308                                 proto_flags |= CAM_EAF_PRINT_RESULT;
  309                                 /* FALLTHROUGH */
  310                         case CAM_EPF_MINIMAL:
  311                                 proto_flags |= CAM_EAF_PRINT_STATUS;
  312                                 /* FALLTHROUGH */
  313                         default:
  314                                 break;
  315                         }
  316                         break;
  317                 case XPT_SCSI_IO:
  318                         switch (proto_flags & CAM_EPF_LEVEL_MASK) {
  319                         case CAM_EPF_NONE:
  320                                 break;
  321                         case CAM_EPF_ALL:
  322                         case CAM_EPF_NORMAL:
  323                                 proto_flags |= CAM_ESF_PRINT_SENSE;
  324                                 /* FALLTHROUGH */
  325                         case CAM_EPF_MINIMAL:
  326                                 proto_flags |= CAM_ESF_PRINT_STATUS;
  327                                 /* FALLTHROUGH */
  328                         default:
  329                                 break;
  330                         }
  331                         break;
  332                 case XPT_SMP_IO:
  333                         switch (proto_flags & CAM_EPF_LEVEL_MASK) {
  334                         case CAM_EPF_NONE:
  335                                 break;
  336                         case CAM_EPF_ALL:
  337                                 proto_flags |= CAM_ESMF_PRINT_FULL_CMD;
  338                                 /* FALLTHROUGH */
  339                         case CAM_EPF_NORMAL:
  340                         case CAM_EPF_MINIMAL:
  341                                 proto_flags |= CAM_ESMF_PRINT_STATUS;
  342                                 /* FALLTHROUGH */
  343                         default:
  344                                 break;
  345                         }
  346                         break;
  347                 default:
  348                         break;
  349         }
  350 #ifdef _KERNEL
  351         xpt_path_string(ccb->csio.ccb_h.path, path_str, sizeof(path_str));
  352 #else /* !_KERNEL */
  353         cam_path_string(device, path_str, sizeof(path_str));
  354 #endif /* _KERNEL/!_KERNEL */
  355 
  356         sbuf_new(&sb, str, str_len, 0);
  357 
  358         if (flags & CAM_ESF_COMMAND) {
  359                 sbuf_cat(&sb, path_str);
  360                 switch (ccb->ccb_h.func_code) {
  361                 case XPT_ATA_IO:
  362                         ata_command_sbuf(&ccb->ataio, &sb);
  363                         sbuf_printf(&sb, "\n");
  364                         break;
  365                 case XPT_SCSI_IO:
  366 #ifdef _KERNEL
  367                         scsi_command_string(&ccb->csio, &sb);
  368 #else /* !_KERNEL */
  369                         scsi_command_string(device, &ccb->csio, &sb);
  370 #endif /* _KERNEL/!_KERNEL */
  371                         sbuf_printf(&sb, "\n");
  372                         break;
  373                 case XPT_SMP_IO:
  374                         smp_command_sbuf(&ccb->smpio, &sb, path_str, 79 -
  375                                          strlen(path_str), (proto_flags &
  376                                          CAM_ESMF_PRINT_FULL_CMD) ? 79 : 0);
  377                         sbuf_printf(&sb, "\n");
  378                         break;
  379                 default:
  380                         break;
  381                 }
  382         }
  383 
  384         if (flags & CAM_ESF_CAM_STATUS) {
  385                 cam_status status;
  386                 const struct cam_status_entry *entry;
  387 
  388                 sbuf_cat(&sb, path_str);
  389   
  390                 status = ccb->ccb_h.status & CAM_STATUS_MASK;
  391 
  392                 entry = cam_fetch_status_entry(status);
  393 
  394                 if (entry == NULL)
  395                         sbuf_printf(&sb, "CAM status: Unknown (%#x)\n",
  396                                     ccb->ccb_h.status);
  397                 else
  398                         sbuf_printf(&sb, "CAM status: %s\n",
  399                                     entry->status_text);
  400         }
  401 
  402         if (flags & CAM_ESF_PROTO_STATUS) {
  403   
  404                 switch (ccb->ccb_h.func_code) {
  405                 case XPT_ATA_IO:
  406                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) !=
  407                              CAM_ATA_STATUS_ERROR)
  408                                 break;
  409                         if (proto_flags & CAM_EAF_PRINT_STATUS) {
  410                                 sbuf_cat(&sb, path_str);
  411                                 ata_status_sbuf(&ccb->ataio, &sb);
  412                                 sbuf_printf(&sb, "\n");
  413                         }
  414                         if (proto_flags & CAM_EAF_PRINT_RESULT) {
  415                                 sbuf_cat(&sb, path_str);
  416                                 ata_res_sbuf(&ccb->ataio, &sb);
  417                                 sbuf_printf(&sb, "\n");
  418                         }
  419 
  420                         break;
  421                 case XPT_SCSI_IO:
  422                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) !=
  423                              CAM_SCSI_STATUS_ERROR)
  424                                 break;
  425 
  426                         if (proto_flags & CAM_ESF_PRINT_STATUS) {
  427                                 sbuf_cat(&sb, path_str);
  428                                 sbuf_printf(&sb, "SCSI status: %s\n",
  429                                             scsi_status_string(&ccb->csio));
  430                         }
  431 
  432                         if ((proto_flags & CAM_ESF_PRINT_SENSE)
  433                          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
  434                          && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)) {
  435 
  436 #ifdef _KERNEL
  437                                 scsi_sense_sbuf(&ccb->csio, &sb,
  438                                                 SSS_FLAG_NONE);
  439 #else /* !_KERNEL */
  440                                 scsi_sense_sbuf(device, &ccb->csio, &sb,
  441                                                 SSS_FLAG_NONE);
  442 #endif /* _KERNEL/!_KERNEL */
  443                         }
  444                         break;
  445                 case XPT_SMP_IO:
  446                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) !=
  447                              CAM_SMP_STATUS_ERROR)
  448                                 break;
  449 
  450                         if (proto_flags & CAM_ESF_PRINT_STATUS) {
  451                                 sbuf_cat(&sb, path_str);
  452                                 sbuf_printf(&sb, "SMP status: %s (%#x)\n",
  453                                     smp_error_desc(ccb->smpio.smp_response[2]),
  454                                                    ccb->smpio.smp_response[2]);
  455                         }
  456                         /* There is no SMP equivalent to SCSI sense. */
  457                         break;
  458                 default:
  459                         break;
  460                 }
  461         }
  462 
  463         sbuf_finish(&sb);
  464 
  465         return(sbuf_data(&sb));
  466 }
  467 
  468 #ifdef _KERNEL
  469 
  470 void
  471 cam_error_print(union ccb *ccb, cam_error_string_flags flags,
  472                 cam_error_proto_flags proto_flags)
  473 {
  474         char str[512];
  475 
  476         printf("%s", cam_error_string(ccb, str, sizeof(str), flags,
  477                proto_flags));
  478 }
  479 
  480 #else /* !_KERNEL */
  481 
  482 void
  483 cam_error_print(struct cam_device *device, union ccb *ccb,
  484                 cam_error_string_flags flags, cam_error_proto_flags proto_flags,
  485                 FILE *ofile)
  486 {
  487         char str[512];
  488 
  489         if ((device == NULL) || (ccb == NULL) || (ofile == NULL))
  490                 return;
  491 
  492         fprintf(ofile, "%s", cam_error_string(device, ccb, str, sizeof(str),
  493                 flags, proto_flags));
  494 }
  495 
  496 #endif /* _KERNEL/!_KERNEL */
  497 
  498 /*
  499  * Common calculate geometry fuction
  500  *
  501  * Caller should set ccg->volume_size and block_size.
  502  * The extended parameter should be zero if extended translation
  503  * should not be used.
  504  */
  505 void
  506 cam_calc_geometry(struct ccb_calc_geometry *ccg, int extended)
  507 {
  508         uint32_t size_mb, secs_per_cylinder;
  509 
  510         if (ccg->block_size == 0) {
  511                 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
  512                 return;
  513         }
  514         size_mb = (1024L * 1024L) / ccg->block_size;
  515         if (size_mb == 0) {
  516                 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
  517                 return;
  518         }
  519         size_mb = ccg->volume_size / size_mb;
  520         if (size_mb > 1024 && extended) {
  521                 ccg->heads = 255;
  522                 ccg->secs_per_track = 63;
  523         } else {
  524                 ccg->heads = 64;
  525                 ccg->secs_per_track = 32;
  526         }
  527         secs_per_cylinder = ccg->heads * ccg->secs_per_track;
  528         if (secs_per_cylinder == 0) {
  529                 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
  530                 return;
  531         }
  532         ccg->cylinders = ccg->volume_size / secs_per_cylinder;
  533         ccg->ccb_h.status = CAM_REQ_CMP;
  534 }

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