usr.bin/iscsictl/periphs.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 1997-2007 Kenneth D. Merry
   5  * Copyright (c) 2012 The FreeBSD Foundation
   6  * All rights reserved.
   7  *
   8  * Portions of this software were developed by Edward Tomasz Napierala
   9  * under sponsorship from the FreeBSD Foundation.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. The name of the author may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include <sys/ioctl.h>
  39 #include <sys/stdint.h>
  40 #include <sys/types.h>
  41 #include <sys/endian.h>
  42 #include <sys/sbuf.h>
  43
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47 #include <unistd.h>
  48 #include <inttypes.h>
  49 #include <limits.h>
  50 #include <fcntl.h>
  51
  52 #include <cam/cam.h>
  53 #include <cam/cam_debug.h>
  54 #include <cam/cam_ccb.h>
  55 #include <cam/scsi/scsi_all.h>
  56 #include <cam/scsi/scsi_da.h>
  57 #include <cam/scsi/scsi_pass.h>
  58 #include <cam/scsi/scsi_message.h>
  59 #include <cam/scsi/smp_all.h>
  60 #include <cam/ata/ata_all.h>
  61 #include <camlib.h>
  62 #include <libxo/xo.h>
  63
  64 #include "iscsictl.h"
  65
  66 void
  67 print_periphs(int session_id)
  68 {
  69         union ccb ccb;
  70         int bufsize, fd;
  71         unsigned int i;
  72         int have_path_id, skip_bus, skip_device;
  73         path_id_t path_id;
  74
  75         if ((fd = open(XPT_DEVICE, O_RDWR)) == -1) {
  76                 xo_warn("couldn't open %s", XPT_DEVICE);
  77                 return;
  78         }
  79
  80         /*
  81          * First, iterate over the whole list to find the bus.
  82          */
  83
  84         bzero(&ccb, sizeof(union ccb));
  85
  86         ccb.ccb_h.path_id = CAM_XPT_PATH_ID;
  87         ccb.ccb_h.target_id = CAM_TARGET_WILDCARD;
  88         ccb.ccb_h.target_lun = CAM_LUN_WILDCARD;
  89
  90         ccb.ccb_h.func_code = XPT_DEV_MATCH;
  91         bufsize = sizeof(struct dev_match_result) * 100;
  92         ccb.cdm.match_buf_len = bufsize;
  93         ccb.cdm.matches = (struct dev_match_result *)malloc(bufsize);
  94         if (ccb.cdm.matches == NULL) {
  95                 xo_warnx("can't malloc memory for matches");
  96                 close(fd);
  97                 return;
  98         }
  99         ccb.cdm.num_matches = 0;
 100
 101         /*
 102          * We fetch all nodes, since we display most of them in the default
 103          * case, and all in the verbose case.
 104          */
 105         ccb.cdm.num_patterns = 0;
 106         ccb.cdm.pattern_buf_len = 0;
 107
 108         path_id = -1; /* Make GCC happy. */
 109         have_path_id = 0;
 110         skip_bus = 1;
 111         skip_device = 1;
 112
 113         xo_open_container("devices");
 114         xo_open_list("lun");
 115         /*
 116          * We do the ioctl multiple times if necessary, in case there are
 117          * more than 100 nodes in the EDT.
 118          */
 119         do {
 120                 if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) {
 121                         xo_warn("error sending CAMIOCOMMAND ioctl");
 122                         break;
 123                 }
 124
 125                 if ((ccb.ccb_h.status != CAM_REQ_CMP)
 126                  || ((ccb.cdm.status != CAM_DEV_MATCH_LAST)
 127                     && (ccb.cdm.status != CAM_DEV_MATCH_MORE))) {
 128                         xo_warnx("got CAM error %#x, CDM error %d\n",
 129                               ccb.ccb_h.status, ccb.cdm.status);
 130                         break;
 131                 }
 132
 133                 for (i = 0; i < ccb.cdm.num_matches; i++) {
 134                         switch (ccb.cdm.matches[i].type) {
 135                         case DEV_MATCH_BUS: {
 136                                 struct bus_match_result *bus_result;
 137
 138                                 bus_result = &ccb.cdm.matches[i].result.bus_result;
 139
 140                                 skip_bus = 1;
 141
 142                                 if (strcmp(bus_result->dev_name, "iscsi") != 0) {
 143                                         //printf("not iscsi\n");
 144                                         continue;
 145                                 }
 146
 147                                 if ((int)bus_result->unit_number != session_id) {
 148                                         //printf("wrong unit, %d != %d\n", bus_result->unit_number, session_id);
 149                                         continue;
 150                                 }
 151                                 skip_bus = 0;
 152                         }
 153                         case DEV_MATCH_DEVICE: {
 154                                 skip_device = 1;
 155
 156                                 if (skip_bus != 0)
 157                                         continue;
 158
 159                                 skip_device = 0;
 160                                 break;
 161                         }
 162                         case DEV_MATCH_PERIPH: {
 163                                 struct periph_match_result *periph_result;
 164
 165                                 periph_result =
 166                                       &ccb.cdm.matches[i].result.periph_result;
 167
 168                                 if (skip_device != 0)
 169                                         continue;
 170
 171                                 if (strcmp(periph_result->periph_name, "pass") == 0)
 172                                         continue;
 173
 174                                 xo_open_instance("lun");
 175                                 xo_emit("{e:lun/%d}", periph_result->target_lun);
 176                                 xo_emit("{Vq:device/%s%d} ",
 177                                     periph_result->periph_name,
 178                                     periph_result->unit_number);
 179                                 xo_close_instance("lun");
 180
 181                                 if (have_path_id == 0) {
 182                                         path_id = periph_result->path_id;
 183                                         have_path_id = 1;
 184                                 }
 185
 186                                 break;
 187                         }
 188                         default:
 189                                 fprintf(stdout, "unknown match type\n");
 190                                 break;
 191                         }
 192                 }
 193
 194         } while ((ccb.ccb_h.status == CAM_REQ_CMP)
 195                 && (ccb.cdm.status == CAM_DEV_MATCH_MORE));
 196         xo_close_list("lun");
 197
 198         xo_emit("{e:scbus/%d}{e:bus/%d}{e:target/%d}",
 199                 have_path_id ? (int)path_id : -1, 0, have_path_id ? 0 : -1);
 200         xo_close_container("devices");
 201
 202         close(fd);
 203 }
 204