usr.bin/iscsictl/periphs.c

   1 /*
   2  * Copyright (c) 1997-2007 Kenneth D. Merry
   3  * Copyright (c) 2012 The FreeBSD Foundation
   4  * All rights reserved.
   5  *
   6  * Portions of this software were developed by Edward Tomasz Napierala
   7  * under sponsorship from the FreeBSD Foundation.
   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  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. The name of the author may not be used to endorse or promote products
  18  *    derived from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __FBSDID("$FreeBSD$");
  35
  36 #include <sys/ioctl.h>
  37 #include <sys/stdint.h>
  38 #include <sys/types.h>
  39 #include <sys/endian.h>
  40 #include <sys/sbuf.h>
  41
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #include <unistd.h>
  46 #include <inttypes.h>
  47 #include <limits.h>
  48 #include <fcntl.h>
  49
  50 #include <cam/cam.h>
  51 #include <cam/cam_debug.h>
  52 #include <cam/cam_ccb.h>
  53 #include <cam/scsi/scsi_all.h>
  54 #include <cam/scsi/scsi_da.h>
  55 #include <cam/scsi/scsi_pass.h>
  56 #include <cam/scsi/scsi_message.h>
  57 #include <cam/scsi/smp_all.h>
  58 #include <cam/ata/ata_all.h>
  59 #include <camlib.h>
  60 #include <libxo/xo.h>
  61
  62 #include "iscsictl.h"
  63
  64 void
  65 print_periphs(int session_id)
  66 {
  67         union ccb ccb;
  68         int bufsize, fd;
  69         unsigned int i;
  70         int have_path_id, skip_bus, skip_device;
  71         path_id_t path_id;
  72
  73         if ((fd = open(XPT_DEVICE, O_RDWR)) == -1) {
  74                 xo_warn("couldn't open %s", XPT_DEVICE);
  75                 return;
  76         }
  77
  78         /*
  79          * First, iterate over the whole list to find the bus.
  80          */
  81
  82         bzero(&ccb, sizeof(union ccb));
  83
  84         ccb.ccb_h.path_id = CAM_XPT_PATH_ID;
  85         ccb.ccb_h.target_id = CAM_TARGET_WILDCARD;
  86         ccb.ccb_h.target_lun = CAM_LUN_WILDCARD;
  87
  88         ccb.ccb_h.func_code = XPT_DEV_MATCH;
  89         bufsize = sizeof(struct dev_match_result) * 100;
  90         ccb.cdm.match_buf_len = bufsize;
  91         ccb.cdm.matches = (struct dev_match_result *)malloc(bufsize);
  92         if (ccb.cdm.matches == NULL) {
  93                 xo_warnx("can't malloc memory for matches");
  94                 close(fd);
  95                 return;
  96         }
  97         ccb.cdm.num_matches = 0;
  98
  99         /*
 100          * We fetch all nodes, since we display most of them in the default
 101          * case, and all in the verbose case.
 102          */
 103         ccb.cdm.num_patterns = 0;
 104         ccb.cdm.pattern_buf_len = 0;
 105
 106         path_id = -1; /* Make GCC happy. */
 107         have_path_id = 0;
 108         skip_bus = 1;
 109         skip_device = 1;
 110
 111         xo_open_container("devices");
 112         xo_open_list("lun");
 113         /*
 114          * We do the ioctl multiple times if necessary, in case there are
 115          * more than 100 nodes in the EDT.
 116          */
 117         do {
 118                 if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) {
 119                         xo_warn("error sending CAMIOCOMMAND ioctl");
 120                         break;
 121                 }
 122
 123                 if ((ccb.ccb_h.status != CAM_REQ_CMP)
 124                  || ((ccb.cdm.status != CAM_DEV_MATCH_LAST)
 125                     && (ccb.cdm.status != CAM_DEV_MATCH_MORE))) {
 126                         xo_warnx("got CAM error %#x, CDM error %d\n",
 127                               ccb.ccb_h.status, ccb.cdm.status);
 128                         break;
 129                 }
 130
 131                 for (i = 0; i < ccb.cdm.num_matches; i++) {
 132                         switch (ccb.cdm.matches[i].type) {
 133                         case DEV_MATCH_BUS: {
 134                                 struct bus_match_result *bus_result;
 135
 136                                 bus_result = &ccb.cdm.matches[i].result.bus_result;
 137
 138                                 skip_bus = 1;
 139
 140                                 if (strcmp(bus_result->dev_name, "iscsi") != 0) {
 141                                         //printf("not iscsi\n");
 142                                         continue;
 143                                 }
 144
 145                                 if ((int)bus_result->unit_number != session_id) {
 146                                         //printf("wrong unit, %d != %d\n", bus_result->unit_number, session_id);
 147                                         continue;
 148                                 }
 149                                 skip_bus = 0;
 150                         }
 151                         case DEV_MATCH_DEVICE: {
 152                                 skip_device = 1;
 153
 154                                 if (skip_bus != 0)
 155                                         continue;
 156
 157                                 skip_device = 0;
 158                                 break;
 159                         }
 160                         case DEV_MATCH_PERIPH: {
 161                                 struct periph_match_result *periph_result;
 162
 163                                 periph_result =
 164                                       &ccb.cdm.matches[i].result.periph_result;
 165
 166                                 if (skip_device != 0)
 167                                         continue;
 168
 169                                 if (strcmp(periph_result->periph_name, "pass") == 0)
 170                                         continue;
 171
 172                                 xo_open_instance("lun");
 173                                 xo_emit("{e:lun/%d}", periph_result->target_lun);
 174                                 xo_emit("{Vq:device/%s%d} ",
 175                                     periph_result->periph_name,
 176                                     periph_result->unit_number);
 177                                 xo_close_instance("lun");
 178
 179                                 if (have_path_id == 0) {
 180                                         path_id = periph_result->path_id;
 181                                         have_path_id = 1;
 182                                 }
 183
 184                                 break;
 185                         }
 186                         default:
 187                                 fprintf(stdout, "unknown match type\n");
 188                                 break;
 189                         }
 190                 }
 191
 192         } while ((ccb.ccb_h.status == CAM_REQ_CMP)
 193                 && (ccb.cdm.status == CAM_DEV_MATCH_MORE));
 194         xo_close_list("lun");
 195
 196         xo_emit("{e:scbus/%d}{e:bus/%d}{e:target/%d}",
 197                 have_path_id ? (int)path_id : -1, 0, have_path_id ? 0 : -1);
 198         xo_close_container("devices");
 199
 200         close(fd);
 201 }
 202