extras/multipath/main.c

   1 /*
   2  * Soft:        Description here...
   3  *
   4  * Version:     $Id: main.h,v 0.0.1 2003/09/18 15:13:38 cvaroqui Exp $
   5  *
   6  * Author:      Copyright (C) 2003 Christophe Varoqui
   7  *
   8  *              This program is distributed in the hope that it will be useful,
   9  *              but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *              MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *              See the GNU General Public License for more details.
  12  *
  13  *              This program is free software; you can redistribute it and/or
  14  *              modify it under the terms of the GNU General Public License
  15  *              as published by the Free Software Foundation; either version
  16  *              2 of the License, or (at your option) any later version.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <fcntl.h>
  23 #include <sys/types.h>
  24 #include <sys/stat.h>
  25 #include <linux/kdev_t.h>
  26 #include <string.h>
  27 #include <sys/ioctl.h>
  28 #include <libsysfs.h>
  29 #include "libdevmapper/libdevmapper.h"
  30 #include "main.h"
  31
  32 static int
  33 do_inq(int sg_fd, int cmddt, int evpd, unsigned int pg_op,
  34        void *resp, int mx_resp_len, int noisy)
  35 {
  36         unsigned char inqCmdBlk[INQUIRY_CMDLEN] =
  37             { INQUIRY_CMD, 0, 0, 0, 0, 0 };
  38         unsigned char sense_b[SENSE_BUFF_LEN];
  39         struct sg_io_hdr io_hdr;
  40
  41         if (cmddt)
  42                 inqCmdBlk[1] |= 2;
  43         if (evpd)
  44                 inqCmdBlk[1] |= 1;
  45         inqCmdBlk[2] = (unsigned char) pg_op;
  46         inqCmdBlk[4] = (unsigned char) mx_resp_len;
  47         memset(&io_hdr, 0, sizeof (struct sg_io_hdr));
  48         io_hdr.interface_id = 'S';
  49         io_hdr.cmd_len = sizeof (inqCmdBlk);
  50         io_hdr.mx_sb_len = sizeof (sense_b);
  51         io_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
  52         io_hdr.dxfer_len = mx_resp_len;
  53         io_hdr.dxferp = resp;
  54         io_hdr.cmdp = inqCmdBlk;
  55         io_hdr.sbp = sense_b;
  56         io_hdr.timeout = DEF_TIMEOUT;
  57
  58         if (ioctl(sg_fd, SG_IO, &io_hdr) < 0) {
  59                 perror("SG_IO (inquiry) error");
  60                 return -1;
  61         }
  62
  63         /* treat SG_ERR here to get rid of sg_err.[ch] */
  64         io_hdr.status &= 0x7e;
  65         if ((0 == io_hdr.status) && (0 == io_hdr.host_status) &&
  66             (0 == io_hdr.driver_status))
  67                 return 0;
  68         if ((SCSI_CHECK_CONDITION == io_hdr.status) ||
  69             (SCSI_COMMAND_TERMINATED == io_hdr.status) ||
  70             (SG_ERR_DRIVER_SENSE == (0xf & io_hdr.driver_status))) {
  71                 if (io_hdr.sbp && (io_hdr.sb_len_wr > 2)) {
  72                         int sense_key;
  73                         unsigned char * sense_buffer = io_hdr.sbp;
  74                         if (sense_buffer[0] & 0x2)
  75                                 sense_key = sense_buffer[1] & 0xf;
  76                         else
  77                                 sense_key = sense_buffer[2] & 0xf;
  78                         if(RECOVERED_ERROR == sense_key)
  79                                 return 0;
  80                 }
  81         }
  82         return -1;
  83 }
  84
  85 static int
  86 do_tur(int fd)
  87 {
  88         unsigned char turCmdBlk[TUR_CMD_LEN] = { 0x00, 0, 0, 0, 0, 0 };
  89         struct sg_io_hdr io_hdr;
  90         unsigned char sense_buffer[32];
  91
  92         memset(&io_hdr, 0, sizeof (struct sg_io_hdr));
  93         io_hdr.interface_id = 'S';
  94         io_hdr.cmd_len = sizeof (turCmdBlk);
  95         io_hdr.mx_sb_len = sizeof (sense_buffer);
  96         io_hdr.dxfer_direction = SG_DXFER_NONE;
  97         io_hdr.cmdp = turCmdBlk;
  98         io_hdr.sbp = sense_buffer;
  99         io_hdr.timeout = 20000;
 100         io_hdr.pack_id = 0;
 101         if (ioctl(fd, SG_IO, &io_hdr) < 0) {
 102                 close(fd);
 103                 return 0;
 104         }
 105         if (io_hdr.info & SG_INFO_OK_MASK) {
 106                 return 0;
 107         }
 108         return 1;
 109 }
 110
 111 static void
 112 sprint_wwid(char * buff, const char * str)
 113 {
 114         int i;
 115         const char *p;
 116         char *cursor;
 117         unsigned char c;
 118
 119         p = str;
 120         cursor = buff;
 121         for (i = 0; i <= WWID_SIZE / 2 - 1; i++) {
 122                 c = *p++;
 123                 sprintf(cursor, "%.2x", (int) (unsigned char) c);
 124                 cursor += 2;
 125         }
 126         buff[WWID_SIZE - 1] = '\0';
 127 }
 128
 129 static int
 130 get_lun_strings(int fd, struct path * mypath)
 131 {
 132         char buff[36];
 133
 134         if (0 == do_inq(fd, 0, 0, 0, buff, 36, 1)) {
 135                 memcpy(mypath->vendor_id, &buff[8], 8);
 136                 memcpy(mypath->product_id, &buff[16], 16);
 137                 memcpy(mypath->rev, &buff[32], 4);
 138                 return 1;
 139         }
 140         return 0;
 141 }
 142
 143 /*
 144 static int
 145 get_serial (int fd, char * str)
 146 {
 147         char buff[MX_ALLOC_LEN + 1];
 148         int len;
 149
 150         if (0 == do_inq(fd, 0, 1, 0x80, buff, MX_ALLOC_LEN, 0)) {
 151                 len = buff[3];
 152                 if (len > 0) {
 153                         memcpy(str, buff + 4, len);
 154                         buff[len] = '\0';
 155                 }
 156                 return 1;
 157         }
 158         return 0;
 159 }
 160 */
 161
 162 /* hardware vendor specifics : add support for new models below */
 163 static int
 164 get_storageworks_wwid(int fd, char *str)
 165 {
 166         char buff[64];
 167
 168         if (0 == do_inq(fd, 0, 1, 0x83, buff, sizeof (buff), 1)) {
 169                 sprint_wwid(str, &buff[8]);
 170                 return 1;
 171         }
 172         return 0;
 173 }
 174
 175 /* White list switch */
 176 static int
 177 get_unique_id(int fd, struct path * mypath)
 178 {
 179         if (strncmp(mypath->product_id, "HSV110 (C)COMPAQ", 16) == 0 ||
 180             strncmp(mypath->product_id, "HSG80           ", 16) == 0) {
 181                 get_storageworks_wwid(fd, mypath->wwid);
 182                 return 0;
 183         }
 184
 185         return 1;
 186 }
 187
 188 static void
 189 basename(char * str1, char * str2)
 190 {
 191         char *p = str1 + (strlen(str1) - 1);
 192
 193         while (*--p != '/')
 194                 continue;
 195         strcpy(str2, ++p);
 196 }
 197
 198 static int
 199 get_all_paths_sysfs(struct env * conf, struct path * all_paths)
 200 {
 201         int k=0;
 202         int sg_fd;
 203         struct sysfs_directory * sdir;
 204         struct sysfs_directory * devp;
 205         struct sysfs_link * linkp;
 206         char buff[FILE_NAME_SIZE];
 207
 208         char block_path[FILE_NAME_SIZE];
 209
 210         sprintf(block_path, "%s/block", conf->sysfs_path);
 211         sdir = sysfs_open_directory(block_path);
 212         sysfs_read_directory(sdir);
 213         dlist_for_each_data(sdir->subdirs, devp, struct sysfs_directory) {
 214                 sysfs_read_directory(devp);
 215                 if(devp->links == NULL)
 216                         continue;
 217                 dlist_for_each_data(devp->links, linkp, struct sysfs_link) {
 218                         if (!strncmp(linkp->name, "device", 6))
 219                                 break;
 220                 }
 221                 if (linkp == NULL) {
 222                         continue;
 223                 }
 224
 225                 basename(devp->path, buff);
 226                 sprintf(all_paths[k].sg_dev, "/dev/%s", buff);
 227                 strcpy(all_paths[k].dev, all_paths[k].sg_dev);
 228                 if ((sg_fd = open(all_paths[k].sg_dev, O_RDONLY)) < 0) {
 229                         continue;
 230                 }
 231                 get_lun_strings(sg_fd, &all_paths[k]);
 232                 get_unique_id(sg_fd, &all_paths[k]);
 233                 all_paths[k].state = do_tur(sg_fd);
 234                 close(sg_fd);
 235                 basename(linkp->target, buff);
 236                 sscanf(buff, "%i:%i:%i:%i",
 237                         &all_paths[k].sg_id.host_no,
 238                         &all_paths[k].sg_id.channel,
 239                         &all_paths[k].sg_id.scsi_id,
 240                         &all_paths[k].sg_id.lun);
 241                 k++;
 242         }
 243         sysfs_close_directory(sdir);
 244
 245         return 0;
 246 }
 247
 248 static int
 249 get_all_paths_nosysfs(struct env * conf, struct path * all_paths,
 250                       struct scsi_dev * all_scsi_ids)
 251 {
 252         int k, i, sg_fd;
 253         char buff[FILE_NAME_SIZE];
 254         char file_name[FILE_NAME_SIZE];
 255
 256         for (k = 0; k < conf->max_devs; k++) {
 257                 strcpy(file_name, "/dev/sg");
 258                 sprintf(buff, "%d", k);
 259                 strncat(file_name, buff, FILE_NAME_SIZE);
 260                 strcpy(all_paths[k].sg_dev, file_name);
 261                 if ((sg_fd = open(file_name, O_RDONLY)) < 0)
 262                         continue;
 263                 get_lun_strings(sg_fd, &all_paths[k]);
 264                 get_unique_id(sg_fd, &all_paths[k]);
 265                 all_paths[k].state = do_tur(sg_fd);
 266                 if (0 > ioctl(sg_fd, SG_GET_SCSI_ID, &(all_paths[k].sg_id)))
 267                         printf("device %s failed on sg ioctl, skip\n",
 268                                file_name);
 269
 270                 close(sg_fd);
 271
 272                 for (i = 0; i < conf->max_devs; i++) {
 273                         if ((all_paths[k].sg_id.host_no ==
 274                              all_scsi_ids[i].host_no)
 275                             && (all_paths[k].sg_id.scsi_id ==
 276                                 (all_scsi_ids[i].scsi_id.dev_id & 0xff))
 277                             && (all_paths[k].sg_id.lun ==
 278                                 ((all_scsi_ids[i].scsi_id.dev_id >> 8) & 0xff))
 279                             && (all_paths[k].sg_id.channel ==
 280                                 ((all_scsi_ids[i].scsi_id.
 281                                   dev_id >> 16) & 0xff))) {
 282                                 strcpy(all_paths[k].dev, all_scsi_ids[i].dev);
 283                                 break;
 284                         }
 285                 }
 286         }
 287         return 0;
 288 }
 289
 290 static int
 291 get_all_scsi_ids(struct env * conf, struct scsi_dev * all_scsi_ids)
 292 {
 293         int k, big, little, res, host_no, fd;
 294         char buff[64];
 295         char fname[FILE_NAME_SIZE];
 296         struct scsi_idlun my_scsi_id;
 297
 298         for (k = 0; k < conf->max_devs; k++) {
 299                 strcpy(fname, "/dev/sd");
 300                 if (k < 26) {
 301                         buff[0] = 'a' + (char) k;
 302                         buff[1] = '\0';
 303                         strcat(fname, buff);
 304                 } else if (k <= 255) {  /* assumes sequence goes x,y,z,aa,ab,ac etc */
 305                         big = k / 26;
 306                         little = k - (26 * big);
 307                         big = big - 1;
 308
 309                         buff[0] = 'a' + (char) big;
 310                         buff[1] = 'a' + (char) little;
 311                         buff[2] = '\0';
 312                         strcat(fname, buff);
 313                 } else
 314                         strcat(fname, "xxxx");
 315
 316                 if ((fd = open(fname, O_RDONLY)) < 0)
 317                         continue;
 318
 319                 res = ioctl(fd, SCSI_IOCTL_GET_IDLUN, &my_scsi_id);
 320                 if (res < 0) {
 321                         close(fd);
 322                         printf("Could not get scsi idlun\n");
 323                         continue;
 324                 }
 325
 326                 res = ioctl(fd, SCSI_IOCTL_GET_BUS_NUMBER, &host_no);
 327                 if (res < 0) {
 328                         close(fd);
 329                         printf("Could not get host_no\n");
 330                         continue;
 331                 }
 332
 333                 close(fd);
 334
 335                 strcpy(all_scsi_ids[k].dev, fname);
 336                 all_scsi_ids[k].scsi_id = my_scsi_id;
 337                 all_scsi_ids[k].host_no = host_no;
 338         }
 339         return 0;
 340 }
 341
 342 /* print_path style */
 343 #define ALL     0
 344 #define NOWWID  1
 345
 346 static void
 347 print_path(struct path * all_paths, int k, int style)
 348 {
 349         if (style != NOWWID)
 350                 printf("%s ", all_paths[k].wwid);
 351         else
 352                 printf(" \\_");
 353         printf("(%i %i %i %i) ",
 354                all_paths[k].sg_id.host_no,
 355                all_paths[k].sg_id.channel,
 356                all_paths[k].sg_id.scsi_id, all_paths[k].sg_id.lun);
 357         printf("%s ", all_paths[k].sg_dev);
 358         printf("op:%i ", all_paths[k].state);
 359         printf("%s ", all_paths[k].dev);
 360         printf("[%.16s]\n", all_paths[k].product_id);
 361 }
 362
 363 static void
 364 print_all_path(struct env * conf, struct path * all_paths)
 365 {
 366         int k;
 367         char empty_buff[WWID_SIZE];
 368
 369         memset(empty_buff, 0, WWID_SIZE);
 370         for (k = 0; k < conf->max_devs; k++) {
 371                 if (memcmp(empty_buff, all_paths[k].wwid, WWID_SIZE) == 0)
 372                         continue;
 373                 print_path(all_paths, k, ALL);
 374         }
 375 }
 376
 377 static void
 378 print_all_mp(struct path * all_paths, struct multipath * mp, int nmp)
 379 {
 380         int k, i;
 381
 382         for (k = 0; k <= nmp; k++) {
 383                 printf("%s\n", mp[k].wwid);
 384                 for (i = 0; i <= mp[k].npaths; i++)
 385                         print_path(all_paths, PINDEX(k,i), NOWWID);
 386         }
 387 }
 388
 389 static int
 390 coalesce_paths(struct env * conf, struct multipath * mp,
 391                struct path * all_paths)
 392 {
 393         int k, i, nmp, np, already_done;
 394         char empty_buff[WWID_SIZE];
 395
 396         nmp = -1;
 397         already_done = 0;
 398         memset(empty_buff, 0, WWID_SIZE);
 399
 400         for (k = 0; k < conf->max_devs - 1; k++) {
 401                 /* skip this path if no unique id has been found */
 402                 if (memcmp(empty_buff, all_paths[k].wwid, WWID_SIZE) == 0)
 403                         continue;
 404                 np = 0;
 405
 406                 for (i = 0; i <= nmp; i++) {
 407                         if (0 == strcmp(mp[i].wwid, all_paths[k].wwid))
 408                                 already_done = 1;
 409                 }
 410
 411                 if (already_done) {
 412                         already_done = 0;
 413                         continue;
 414                 }
 415
 416                 nmp++;
 417                 strcpy(mp[nmp].wwid, all_paths[k].wwid);
 418                 PINDEX(nmp,np) = k;
 419
 420                 for (i = k + 1; i < conf->max_devs; i++) {
 421                         if (0 == strcmp(all_paths[k].wwid, all_paths[i].wwid)) {
 422                                 np++;
 423                                 PINDEX(nmp,np) = i;
 424                                 mp[nmp].npaths = np;
 425                         }
 426                 }
 427         }
 428         return nmp;
 429 }
 430
 431 static long
 432 get_disk_size (struct env * conf, char * dev) {
 433         long size;
 434         int fd;
 435         char attr_path[FILE_NAME_SIZE];
 436         char buff[FILE_NAME_SIZE];
 437         char basedev[FILE_NAME_SIZE];
 438
 439         if(conf->with_sysfs) {
 440                 basename(dev, basedev);
 441                 sprintf(attr_path, "%s/block/%s/size",
 442                         conf->sysfs_path, basedev);
 443                 if (0 > sysfs_read_attribute_value(attr_path, buff,
 444                                          FILE_NAME_SIZE * sizeof(char)))
 445                         return -1;
 446                 size = atoi(buff);
 447                 return size;
 448         } else {
 449                 if ((fd = open(dev, O_RDONLY)) < 0)
 450                         return -1;
 451                 if(!ioctl(fd, BLKGETSIZE, &size))
 452                         return size;
 453         }
 454         return -1;
 455 }
 456
 457 static int
 458 make_dm_node(char * str)
 459 {
 460         int r = 0;
 461         char buff[FILE_NAME_SIZE];
 462         struct dm_names * names;
 463         unsigned next = 0;
 464         struct dm_task *dmt;
 465
 466         if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
 467                 return 0;
 468
 469         if (!dm_task_run(dmt))
 470                 goto out;
 471
 472         if (!(names = dm_task_get_names(dmt)))
 473                 goto out;
 474
 475         if (!names->dev) {
 476                 r = 1;
 477                 goto out;
 478         }
 479
 480         do {
 481                 if (0 == strcmp(names->name, str))
 482                         break;
 483                 next = names->next;
 484                 names = (void *) names + next;
 485         } while (next);
 486
 487         sprintf(buff, "/dev/mapper/%s", str);
 488         unlink(buff);
 489         mknod(buff, 0600 | S_IFBLK, names->dev);
 490
 491         out:
 492         dm_task_destroy(dmt);
 493         return r;
 494
 495 }
 496
 497 /* future use ?
 498 static int
 499 del_map(char * str) {
 500         struct dm_task *dmt;
 501
 502         if (!(dmt = dm_task_create(DM_DEVICE_REMOVE)))
 503                 return 0;
 504         if (!dm_task_set_name(dmt, str))
 505                 goto delout;
 506         if (!dm_task_run(dmt))
 507                 goto delout;
 508
 509         printf("Deleted device map : %s\n", str);
 510
 511         delout:
 512         dm_task_destroy(dmt);
 513         return 1;
 514 }
 515 */
 516
 517 static int
 518 add_map(struct env * conf, struct path * all_paths,
 519         struct multipath * mp, int index, int op)
 520 {
 521         char params[255];
 522         char * params_p;
 523         struct dm_task *dmt;
 524         int i, np;
 525         long size = -1;
 526
 527         if (!(dmt = dm_task_create(op)))
 528                 return 0;
 529
 530         if (!dm_task_set_name(dmt, mp[index].wwid))
 531                 goto addout;
 532         params_p = &params[0];
 533
 534         np = 0;
 535         for (i=0; i<=mp[index].npaths; i++) {
 536                 if ((1 == all_paths[PINDEX(index,i)].state) &&
 537                         (0 == all_paths[PINDEX(index,i)].sg_id.scsi_type))
 538                         np++;
 539         }
 540         if (np == 0)
 541                 goto addout;
 542         params_p += sprintf(params_p, "%i 32", np);
 543
 544         for (i=0; i<=mp[index].npaths; i++) {
 545                 if (( 0 == all_paths[PINDEX(index,i)].state) ||
 546                         (0 != all_paths[PINDEX(index,i)].sg_id.scsi_type))
 547                         continue;
 548                 if (size < 0)
 549                         size = get_disk_size(conf, all_paths[PINDEX(index,0)].dev);
 550                 params_p += sprintf(params_p, " %s %i",
 551                         all_paths[PINDEX(index,i)].dev, 0);
 552         }
 553
 554         if (size < 0)
 555                 goto addout;
 556
 557         if (!conf->quiet) {
 558                 if (op == DM_DEVICE_RELOAD)
 559                         printf("U|");
 560                 if (op == DM_DEVICE_CREATE)
 561                         printf("N|");
 562                 printf("%s : 0 %li %s %s\n",
 563                         mp[index].wwid, size, DM_TARGET, params);
 564         }
 565
 566         if (!dm_task_add_target(dmt, 0, size, DM_TARGET, params))
 567                 goto addout;
 568
 569         if (!dm_task_run(dmt))
 570                 goto addout;
 571
 572
 573         make_dm_node(mp[index].wwid);
 574
 575         addout:
 576         dm_task_destroy(dmt);
 577         return 1;
 578 }
 579
 580 /*
 581 static int
 582 get_table(const char * str)
 583 {
 584         int r = 0;
 585         struct dm_task *dmt;
 586         void *next = NULL;
 587         uint64_t start, length;
 588         char *target_type = NULL;
 589         char *params;
 590
 591         if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
 592                 return 0;
 593
 594         if (!dm_task_set_name(dmt, str))
 595                 goto out;
 596
 597         if (!dm_task_run(dmt))
 598                 goto out;
 599
 600         do {
 601                 next = dm_get_next_target(dmt, next, &start, &length,
 602                                           &target_type, &params);
 603                 if (target_type) {
 604                         printf("%" PRIu64 " %" PRIu64 " %s %s\n",
 605                                start, length, target_type, params);
 606                 }
 607         } while (next);
 608
 609         r = 1;
 610
 611       out:
 612         dm_task_destroy(dmt);
 613         return r;
 614
 615 }
 616 */
 617
 618 static int
 619 map_present(char * str)
 620 {
 621         int r = 0;
 622         struct dm_task *dmt;
 623         struct dm_names *names;
 624         unsigned next = 0;
 625
 626         if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
 627                 return 0;
 628
 629         if (!dm_task_run(dmt))
 630                 goto out;
 631
 632         if (!(names = dm_task_get_names(dmt)))
 633                 goto out;
 634
 635         if (!names->dev) {
 636                 goto out;
 637         }
 638
 639         do {
 640                 if (0 == strcmp(names->name, str))
 641                         r = 1;
 642                 next = names->next;
 643                 names = (void *) names + next;
 644         } while (next);
 645
 646         out:
 647         dm_task_destroy(dmt);
 648         return r;
 649 }
 650
 651 static void
 652 usage(char * progname)
 653 {
 654         fprintf(stderr, VERSION_STRING);
 655         fprintf(stderr, "Usage: %s [-v|-q] [-d] [-m max_devs]\n", progname);
 656         fprintf(stderr, "\t-v\t\tverbose, print all paths and multipaths\n");
 657         fprintf(stderr, "\t-q\t\tquiet, no output at all\n");
 658         fprintf(stderr, "\t-d\t\tdry run, do not create or update devmaps\n");
 659         fprintf(stderr, "\t-m max_devs\tscan {max_devs} devices at most\n");
 660         exit(1);
 661 }
 662
 663 static int
 664 running(char * run) {
 665         struct stat buf;
 666
 667         if(!stat(run, &buf))
 668                 return 1;
 669         return 0;
 670 }
 671
 672 int
 673 main(int argc, char *argv[])
 674 {
 675         char * run = "/var/run/multipath.run";
 676         struct multipath * mp;
 677         struct path * all_paths;
 678         struct scsi_dev * all_scsi_ids;
 679         struct env conf;
 680         int i, k, nmp;
 681
 682         /* Default behaviour */
 683         conf.max_devs = MAX_DEVS;
 684         conf.dry_run = 0;       /* 1 == Do not Create/Update devmaps */
 685         conf.verbose = 0;       /* 1 == Print all_paths and mp */
 686         conf.quiet = 0;         /* 1 == Do not even print devmaps */
 687         conf.with_sysfs = 0;    /* Default to compat / suboptimal behaviour */
 688
 689         /* kindly provided by libsysfs */
 690         if (0 == sysfs_get_mnt_path(conf.sysfs_path, FILE_NAME_SIZE))
 691                 conf.with_sysfs = 1;
 692
 693         for (i = 1; i < argc; ++i) {
 694                 if (0 == strcmp("-v", argv[i])) {
 695                         if (conf.quiet == 1)
 696                                 usage(argv[0]);
 697                         conf.verbose = 1;
 698                 } else if (0 == strcmp("-m", argv[i])) {
 699                         conf.max_devs = atoi(argv[++i]);
 700                         if (conf.max_devs < 2)
 701                                 usage(argv[0]);
 702                 } else if (0 == strcmp("-q", argv[i])) {
 703                         if (conf.verbose == 1)
 704                                 usage(argv[0]);
 705                         conf.quiet = 1;
 706                 } else if (0 == strcmp("-d", argv[i]))
 707                         conf.dry_run = 1;
 708                 else if (*argv[i] == '-') {
 709                         fprintf(stderr, "Unknown switch: %s\n", argv[i]);
 710                         usage(argv[0]);
 711                 } else if (*argv[i] != '-') {
 712                         fprintf(stderr, "Unknown argument\n");
 713                         usage(argv[0]);
 714                 }
 715
 716         }
 717
 718         if (running(run)) {
 719                 if (conf.verbose) {
 720                         fprintf(stderr, "Already running.\n");
 721                         fprintf(stderr, "If you know what you do, please ");
 722                         fprintf(stderr, "remove %s\n", run);
 723                 }
 724                 return 1;
 725         }
 726
 727         if(!open(run, O_CREAT))
 728                 exit(1);
 729
 730         /* dynamic allocations */
 731         mp = malloc(conf.max_devs * sizeof(struct multipath));
 732         all_paths = malloc(conf.max_devs * sizeof(struct path));
 733         all_scsi_ids = malloc(conf.max_devs * sizeof(struct scsi_dev));
 734         if (mp == NULL || all_paths == NULL || all_scsi_ids == NULL) {
 735                 unlink(run);
 736                 exit(1);
 737         }
 738
 739         if (!conf.with_sysfs) {
 740                 get_all_scsi_ids(&conf, all_scsi_ids);
 741                 get_all_paths_nosysfs(&conf, all_paths, all_scsi_ids);
 742         } else {
 743                 get_all_paths_sysfs(&conf, all_paths);
 744         }
 745         nmp = coalesce_paths(&conf, mp, all_paths);
 746
 747         if (conf.verbose) {
 748                 print_all_path(&conf, all_paths);
 749                 fprintf(stdout, "\n");
 750                 print_all_mp(all_paths, mp, nmp);
 751                 fprintf(stdout, "\n");
 752         }
 753
 754         if (conf.dry_run) {
 755                 unlink(run);
 756                 exit(0);
 757         }
 758
 759         for (k=0; k<=nmp; k++) {
 760                 if (map_present(mp[k].wwid)) {
 761                         add_map(&conf, all_paths, mp, k, DM_DEVICE_RELOAD);
 762                 } else {
 763                         add_map(&conf, all_paths, mp, k, DM_DEVICE_CREATE);
 764                 }
 765         }
 766         unlink(run);
 767         exit(0);
 768 }