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/8.2/sys/cam/cam.c 210856 2010-08-05 10:45:27Z bcr $");
   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 <camlib.h>
   41 #endif /* _KERNEL */
   42 
   43 #include <cam/cam.h>
   44 #include <cam/cam_ccb.h>
   45 #include <cam/scsi/scsi_all.h>
   46 #include <sys/sbuf.h>
   47 
   48 #ifdef _KERNEL
   49 #include <sys/libkern.h>
   50 #include <cam/cam_queue.h>
   51 #include <cam/cam_xpt.h>
   52 #endif
   53 
   54 static int      camstatusentrycomp(const void *key, const void *member);
   55 
   56 const struct cam_status_entry cam_status_table[] = {
   57         { CAM_REQ_INPROG,        "CCB request is in progress"                },
   58         { CAM_REQ_CMP,           "CCB request completed without error"       },
   59         { CAM_REQ_ABORTED,       "CCB request aborted by the host"           },
   60         { CAM_UA_ABORT,          "Unable to abort CCB request"               },
   61         { CAM_REQ_CMP_ERR,       "CCB request completed with an error"       },
   62         { CAM_BUSY,              "CAM subsystem is busy"                     },
   63         { CAM_REQ_INVALID,       "CCB request was invalid"                   },
   64         { CAM_PATH_INVALID,      "Supplied Path ID is invalid"               },
   65         { CAM_DEV_NOT_THERE,     "Device Not Present"                        },
   66         { CAM_UA_TERMIO,         "Unable to terminate I/O CCB request"       },
   67         { CAM_SEL_TIMEOUT,       "Selection Timeout"                         },
   68         { CAM_CMD_TIMEOUT,       "Command timeout"                           },
   69         { CAM_SCSI_STATUS_ERROR, "SCSI Status Error"                         },
   70         { CAM_MSG_REJECT_REC,    "Message Reject Reveived"                   },
   71         { CAM_SCSI_BUS_RESET,    "SCSI Bus Reset Sent/Received"              },
   72         { CAM_UNCOR_PARITY,      "Uncorrectable parity/CRC error"            },
   73         { CAM_AUTOSENSE_FAIL,    "Auto-Sense Retrieval Failed"               },
   74         { CAM_NO_HBA,            "No HBA Detected"                           },
   75         { CAM_DATA_RUN_ERR,      "Data Overrun error"                        },
   76         { CAM_UNEXP_BUSFREE,     "Unexpected Bus Free"                       },
   77         { CAM_SEQUENCE_FAIL,     "Target Bus Phase Sequence Failure"         },
   78         { CAM_CCB_LEN_ERR,       "CCB length supplied is inadequate"         },
   79         { CAM_PROVIDE_FAIL,      "Unable to provide requested capability"    },
   80         { CAM_BDR_SENT,          "SCSI BDR Message Sent"                     },
   81         { CAM_REQ_TERMIO,        "CCB request terminated by the host"        },
   82         { CAM_UNREC_HBA_ERROR,   "Unrecoverable Host Bus Adapter Error"      },
   83         { CAM_REQ_TOO_BIG,       "The request was too large for this host"   },
   84         { CAM_REQUEUE_REQ,       "Unconditionally Re-queue Request",         },
   85         { CAM_ATA_STATUS_ERROR,  "ATA Status Error"                          },
   86         { CAM_IDE,               "Initiator Detected Error Message Received" },
   87         { CAM_RESRC_UNAVAIL,     "Resource Unavailable"                      },
   88         { CAM_UNACKED_EVENT,     "Unacknowledged Event by Host"              },
   89         { CAM_MESSAGE_RECV,      "Message Received in Host Target Mode"      },
   90         { CAM_INVALID_CDB,       "Invalid CDB received in Host Target Mode"  },
   91         { CAM_LUN_INVALID,       "Invalid Lun"                               },
   92         { CAM_TID_INVALID,       "Invalid Target ID"                         },
   93         { CAM_FUNC_NOTAVAIL,     "Function Not Available"                    },
   94         { CAM_NO_NEXUS,          "Nexus Not Established"                     },
   95         { CAM_IID_INVALID,       "Invalid Initiator ID"                      },
   96         { CAM_CDB_RECVD,         "CDB Received"                              },
   97         { CAM_LUN_ALRDY_ENA,     "LUN Already Enabled for Target Mode"       },
   98         { CAM_SCSI_BUSY,         "SCSI Bus Busy"                             },
   99 };
  100 
  101 const int num_cam_status_entries =
  102     sizeof(cam_status_table)/sizeof(*cam_status_table);
  103 
  104 #ifdef _KERNEL
  105 SYSCTL_NODE(_kern, OID_AUTO, cam, CTLFLAG_RD, 0, "CAM Subsystem");
  106 #endif
  107 
  108 void
  109 cam_strvis(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen)
  110 {
  111 
  112         /* Trim leading/trailing spaces, nulls. */
  113         while (srclen > 0 && src[0] == ' ')
  114                 src++, srclen--;
  115         while (srclen > 0
  116             && (src[srclen-1] == ' ' || src[srclen-1] == '\0'))
  117                 srclen--;
  118 
  119         while (srclen > 0 && dstlen > 1) {
  120                 u_int8_t *cur_pos = dst;
  121 
  122                 if (*src < 0x20 || *src >= 0x80) {
  123                         /* SCSI-II Specifies that these should never occur. */
  124                         /* non-printable character */
  125                         if (dstlen > 4) {
  126                                 *cur_pos++ = '\\';
  127                                 *cur_pos++ = ((*src & 0300) >> 6) + '';
  128                                 *cur_pos++ = ((*src & 0070) >> 3) + '';
  129                                 *cur_pos++ = ((*src & 0007) >> 0) + '';
  130                         } else {
  131                                 *cur_pos++ = '?';
  132                         }
  133                 } else {
  134                         /* normal character */
  135                         *cur_pos++ = *src;
  136                 }
  137                 src++;
  138                 srclen--;
  139                 dstlen -= cur_pos - dst;
  140                 dst = cur_pos;
  141         }
  142         *dst = '\0';
  143 }
  144 
  145 /*
  146  * Compare string with pattern, returning 0 on match.
  147  * Short pattern matches trailing blanks in name,
  148  * wildcard '*' in pattern matches rest of name,
  149  * wildcard '?' matches a single non-space character.
  150  */
  151 int
  152 cam_strmatch(const u_int8_t *str, const u_int8_t *pattern, int str_len)
  153 {
  154 
  155         while (*pattern != '\0'&& str_len > 0) {  
  156 
  157                 if (*pattern == '*') {
  158                         return (0);
  159                 }
  160                 if ((*pattern != *str)
  161                  && (*pattern != '?' || *str == ' ')) {
  162                         return (1);
  163                 }
  164                 pattern++;
  165                 str++;
  166                 str_len--;
  167         }
  168         while (str_len > 0 && *str == ' ') {
  169                 str++;
  170                 str_len--;
  171         }
  172         if (str_len > 0 && *str == 0)
  173                 str_len = 0;
  174 
  175         return (str_len);
  176 }
  177 
  178 caddr_t
  179 cam_quirkmatch(caddr_t target, caddr_t quirk_table, int num_entries,
  180                int entry_size, cam_quirkmatch_t *comp_func)
  181 {
  182         for (; num_entries > 0; num_entries--, quirk_table += entry_size) {
  183                 if ((*comp_func)(target, quirk_table) == 0)
  184                         return (quirk_table);
  185         }
  186         return (NULL);
  187 }
  188 
  189 const struct cam_status_entry*
  190 cam_fetch_status_entry(cam_status status)
  191 {
  192         status &= CAM_STATUS_MASK;
  193         return (bsearch(&status, &cam_status_table,
  194                         num_cam_status_entries,
  195                         sizeof(*cam_status_table),
  196                         camstatusentrycomp));
  197 }
  198 
  199 static int
  200 camstatusentrycomp(const void *key, const void *member)
  201 {
  202         cam_status status;
  203         const struct cam_status_entry *table_entry;
  204 
  205         status = *(const cam_status *)key;
  206         table_entry = (const struct cam_status_entry *)member;
  207 
  208         return (status - table_entry->status_code);
  209 }
  210 
  211 
  212 #ifdef _KERNEL
  213 char *
  214 cam_error_string(union ccb *ccb, char *str, int str_len,
  215                  cam_error_string_flags flags,
  216                  cam_error_proto_flags proto_flags)
  217 #else /* !_KERNEL */
  218 char *
  219 cam_error_string(struct cam_device *device, union ccb *ccb, char *str,
  220                  int str_len, cam_error_string_flags flags,
  221                  cam_error_proto_flags proto_flags)
  222 #endif /* _KERNEL/!_KERNEL */
  223 {
  224         char path_str[64];
  225         struct sbuf sb;
  226 
  227         if ((ccb == NULL)
  228          || (str == NULL)
  229          || (str_len <= 0))
  230                 return(NULL);
  231 
  232         if (flags == CAM_ESF_NONE)
  233                 return(NULL);
  234 
  235         switch (ccb->ccb_h.func_code) {
  236                 case XPT_ATA_IO:
  237                         switch (proto_flags & CAM_EPF_LEVEL_MASK) {
  238                         case CAM_EPF_NONE:
  239                                 break;
  240                         case CAM_EPF_ALL:
  241                         case CAM_EPF_NORMAL:
  242                                 proto_flags |= CAM_EAF_PRINT_RESULT;
  243                                 /* FALLTHROUGH */
  244                         case CAM_EPF_MINIMAL:
  245                                 proto_flags |= CAM_EAF_PRINT_STATUS;
  246                                 /* FALLTHROUGH */
  247                         default:
  248                                 break;
  249                         }
  250                         break;
  251                 case XPT_SCSI_IO:
  252                         switch (proto_flags & CAM_EPF_LEVEL_MASK) {
  253                         case CAM_EPF_NONE:
  254                                 break;
  255                         case CAM_EPF_ALL:
  256                         case CAM_EPF_NORMAL:
  257                                 proto_flags |= CAM_ESF_PRINT_SENSE;
  258                                 /* FALLTHROUGH */
  259                         case CAM_EPF_MINIMAL:
  260                                 proto_flags |= CAM_ESF_PRINT_STATUS;
  261                                 /* FALLTHROUGH */
  262                         default:
  263                                 break;
  264                         }
  265                         break;
  266                 default:
  267                         break;
  268         }
  269 #ifdef _KERNEL
  270         xpt_path_string(ccb->csio.ccb_h.path, path_str, sizeof(path_str));
  271 #else /* !_KERNEL */
  272         cam_path_string(device, path_str, sizeof(path_str));
  273 #endif /* _KERNEL/!_KERNEL */
  274 
  275         sbuf_new(&sb, str, str_len, 0);
  276 
  277         if (flags & CAM_ESF_COMMAND) {
  278                 sbuf_cat(&sb, path_str);
  279                 switch (ccb->ccb_h.func_code) {
  280                 case XPT_ATA_IO:
  281                         ata_command_sbuf(&ccb->ataio, &sb);
  282                         sbuf_printf(&sb, "\n");
  283                         break;
  284                 case XPT_SCSI_IO:
  285 #ifdef _KERNEL
  286                         scsi_command_string(&ccb->csio, &sb);
  287 #else /* !_KERNEL */
  288                         scsi_command_string(device, &ccb->csio, &sb);
  289 #endif /* _KERNEL/!_KERNEL */
  290                         sbuf_printf(&sb, "\n");
  291                         break;
  292                 default:
  293                         break;
  294                 }
  295         }
  296 
  297         if (flags & CAM_ESF_CAM_STATUS) {
  298                 cam_status status;
  299                 const struct cam_status_entry *entry;
  300 
  301                 sbuf_cat(&sb, path_str);
  302   
  303                 status = ccb->ccb_h.status & CAM_STATUS_MASK;
  304 
  305                 entry = cam_fetch_status_entry(status);
  306 
  307                 if (entry == NULL)
  308                         sbuf_printf(&sb, "CAM status: Unknown (%#x)\n",
  309                                     ccb->ccb_h.status);
  310                 else
  311                         sbuf_printf(&sb, "CAM status: %s\n",
  312                                     entry->status_text);
  313         }
  314 
  315         if (flags & CAM_ESF_PROTO_STATUS) {
  316   
  317                 switch (ccb->ccb_h.func_code) {
  318                 case XPT_ATA_IO:
  319                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) !=
  320                              CAM_ATA_STATUS_ERROR)
  321                                 break;
  322                         if (proto_flags & CAM_EAF_PRINT_STATUS) {
  323                                 sbuf_cat(&sb, path_str);
  324                                 ata_status_sbuf(&ccb->ataio, &sb);
  325                                 sbuf_printf(&sb, "\n");
  326                         }
  327                         if (proto_flags & CAM_EAF_PRINT_RESULT) {
  328                                 sbuf_cat(&sb, path_str);
  329                                 ata_res_sbuf(&ccb->ataio, &sb);
  330                                 sbuf_printf(&sb, "\n");
  331                         }
  332 
  333                         break;
  334                 case XPT_SCSI_IO:
  335                         if ((ccb->ccb_h.status & CAM_STATUS_MASK) !=
  336                              CAM_SCSI_STATUS_ERROR)
  337                                 break;
  338 
  339                         if (proto_flags & CAM_ESF_PRINT_STATUS) {
  340                                 sbuf_cat(&sb, path_str);
  341                                 sbuf_printf(&sb, "SCSI status: %s\n",
  342                                             scsi_status_string(&ccb->csio));
  343                         }
  344 
  345                         if ((proto_flags & CAM_ESF_PRINT_SENSE)
  346                          && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND)
  347                          && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)) {
  348 
  349 #ifdef _KERNEL
  350                                 scsi_sense_sbuf(&ccb->csio, &sb,
  351                                                 SSS_FLAG_NONE);
  352 #else /* !_KERNEL */
  353                                 scsi_sense_sbuf(device, &ccb->csio, &sb,
  354                                                 SSS_FLAG_NONE);
  355 #endif /* _KERNEL/!_KERNEL */
  356                         }
  357                         break;
  358                 default:
  359                         break;
  360                 }
  361         }
  362 
  363         sbuf_finish(&sb);
  364 
  365         return(sbuf_data(&sb));
  366 }
  367 
  368 #ifdef _KERNEL
  369 
  370 void
  371 cam_error_print(union ccb *ccb, cam_error_string_flags flags,
  372                 cam_error_proto_flags proto_flags)
  373 {
  374         char str[512];
  375 
  376         printf("%s", cam_error_string(ccb, str, sizeof(str), flags,
  377                proto_flags));
  378 }
  379 
  380 #else /* !_KERNEL */
  381 
  382 void
  383 cam_error_print(struct cam_device *device, union ccb *ccb,
  384                 cam_error_string_flags flags, cam_error_proto_flags proto_flags,
  385                 FILE *ofile)
  386 {
  387         char str[512];
  388 
  389         if ((device == NULL) || (ccb == NULL) || (ofile == NULL))
  390                 return;
  391 
  392         fprintf(ofile, "%s", cam_error_string(device, ccb, str, sizeof(str),
  393                 flags, proto_flags));
  394 }
  395 
  396 #endif /* _KERNEL/!_KERNEL */
  397 
  398 /*
  399  * Common calculate geometry fuction
  400  *
  401  * Caller should set ccg->volume_size and block_size.
  402  * The extended parameter should be zero if extended translation
  403  * should not be used.
  404  */
  405 void
  406 cam_calc_geometry(struct ccb_calc_geometry *ccg, int extended)
  407 {
  408         uint32_t size_mb, secs_per_cylinder;
  409 
  410         if (ccg->block_size == 0) {
  411                 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
  412                 return;
  413         }
  414         size_mb = (1024L * 1024L) / ccg->block_size;
  415         if (size_mb == 0) {
  416                 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
  417                 return;
  418         }
  419         size_mb = ccg->volume_size / size_mb;
  420         if (size_mb > 1024 && extended) {
  421                 ccg->heads = 255;
  422                 ccg->secs_per_track = 63;
  423         } else {
  424                 ccg->heads = 64;
  425                 ccg->secs_per_track = 32;
  426         }
  427         secs_per_cylinder = ccg->heads * ccg->secs_per_track;
  428         if (secs_per_cylinder == 0) {
  429                 ccg->ccb_h.status = CAM_REQ_CMP_ERR;
  430                 return;
  431         }
  432         ccg->cylinders = ccg->volume_size / secs_per_cylinder;
  433         ccg->ccb_h.status = CAM_REQ_CMP;
  434 }

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