2 * Soft: Description here...
4 * Version: $Id: main.h,v 0.0.1 2003/09/18 15:13:38 cvaroqui Exp $
6 * Author: Copyright (C) 2003 Christophe Varoqui
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.
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.
23 #include <sys/types.h>
25 #include <linux/kdev_t.h>
27 #include <sys/ioctl.h>
29 #include "libdevmapper/libdevmapper.h"
33 do_inq(int sg_fd, int cmddt, int evpd, unsigned int pg_op,
34 void *resp, int mx_resp_len, int noisy)
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;
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;
54 io_hdr.cmdp = inqCmdBlk;
56 io_hdr.timeout = DEF_TIMEOUT;
58 if (ioctl(sg_fd, SG_IO, &io_hdr) < 0) {
59 perror("SG_IO (inquiry) error");
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))
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)) {
73 unsigned char * sense_buffer = io_hdr.sbp;
74 if (sense_buffer[0] & 0x2)
75 sense_key = sense_buffer[1] & 0xf;
77 sense_key = sense_buffer[2] & 0xf;
78 if(RECOVERED_ERROR == sense_key)
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];
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;
101 if (ioctl(fd, SG_IO, &io_hdr) < 0) {
105 if (io_hdr.info & SG_INFO_OK_MASK) {
112 sprint_wwid(char * buff, const char * str)
121 for (i = 0; i <= WWID_SIZE / 2 - 1; i++) {
123 sprintf(cursor, "%.2x", (int) (unsigned char) c);
126 buff[WWID_SIZE - 1] = '\0';
130 get_lun_strings(int fd, struct path * mypath)
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);
145 get_serial (int fd, char * str)
147 char buff[MX_ALLOC_LEN + 1];
150 if (0 == do_inq(fd, 0, 1, 0x80, buff, MX_ALLOC_LEN, 0)) {
153 memcpy(str, buff + 4, len);
162 /* hardware vendor specifics : add support for new models below */
164 get_storageworks_wwid(int fd, char *str)
168 if (0 == do_inq(fd, 0, 1, 0x83, buff, sizeof (buff), 1)) {
169 sprint_wwid(str, &buff[8]);
175 /* White list switch */
177 get_unique_id(int fd, struct path * mypath)
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);
189 basename(char * str1, char * str2)
191 char *p = str1 + (strlen(str1) - 1);
199 blacklist (char * dev) {
216 for (i = 0; blist[i].lengh; i++) {
217 if (strncmp(dev, blist[i].headstr, blist[i].lengh))
224 get_all_paths_sysfs(struct env * conf, struct path * all_paths)
228 struct sysfs_directory * sdir;
229 struct sysfs_directory * devp;
230 struct sysfs_link * linkp;
231 char buff[FILE_NAME_SIZE];
233 char block_path[FILE_NAME_SIZE];
235 sprintf(block_path, "%s/block", conf->sysfs_path);
236 sdir = sysfs_open_directory(block_path);
237 sysfs_read_directory(sdir);
238 dlist_for_each_data(sdir->subdirs, devp, struct sysfs_directory) {
239 if (blacklist(devp->name))
241 sysfs_read_directory(devp);
242 if(devp->links == NULL)
244 dlist_for_each_data(devp->links, linkp, struct sysfs_link) {
245 if (!strncmp(linkp->name, "device", 6))
252 basename(devp->path, buff);
253 sprintf(all_paths[k].sg_dev, "/dev/%s", buff);
254 strcpy(all_paths[k].dev, all_paths[k].sg_dev);
255 if ((sg_fd = open(all_paths[k].sg_dev, O_RDONLY)) < 0) {
258 get_lun_strings(sg_fd, &all_paths[k]);
259 get_unique_id(sg_fd, &all_paths[k]);
260 all_paths[k].state = do_tur(sg_fd);
262 basename(linkp->target, buff);
263 sscanf(buff, "%i:%i:%i:%i",
264 &all_paths[k].sg_id.host_no,
265 &all_paths[k].sg_id.channel,
266 &all_paths[k].sg_id.scsi_id,
267 &all_paths[k].sg_id.lun);
270 sysfs_close_directory(sdir);
276 get_all_paths_nosysfs(struct env * conf, struct path * all_paths,
277 struct scsi_dev * all_scsi_ids)
280 char buff[FILE_NAME_SIZE];
281 char file_name[FILE_NAME_SIZE];
283 for (k = 0; k < conf->max_devs; k++) {
284 strcpy(file_name, "/dev/sg");
285 sprintf(buff, "%d", k);
286 strncat(file_name, buff, FILE_NAME_SIZE);
287 strcpy(all_paths[k].sg_dev, file_name);
288 if ((sg_fd = open(file_name, O_RDONLY)) < 0)
290 get_lun_strings(sg_fd, &all_paths[k]);
291 get_unique_id(sg_fd, &all_paths[k]);
292 all_paths[k].state = do_tur(sg_fd);
293 if (0 > ioctl(sg_fd, SG_GET_SCSI_ID, &(all_paths[k].sg_id)))
294 printf("device %s failed on sg ioctl, skip\n",
299 for (i = 0; i < conf->max_devs; i++) {
300 if ((all_paths[k].sg_id.host_no ==
301 all_scsi_ids[i].host_no)
302 && (all_paths[k].sg_id.scsi_id ==
303 (all_scsi_ids[i].scsi_id.dev_id & 0xff))
304 && (all_paths[k].sg_id.lun ==
305 ((all_scsi_ids[i].scsi_id.dev_id >> 8) & 0xff))
306 && (all_paths[k].sg_id.channel ==
307 ((all_scsi_ids[i].scsi_id.
308 dev_id >> 16) & 0xff))) {
309 strcpy(all_paths[k].dev, all_scsi_ids[i].dev);
318 get_all_scsi_ids(struct env * conf, struct scsi_dev * all_scsi_ids)
320 int k, big, little, res, host_no, fd;
322 char fname[FILE_NAME_SIZE];
323 struct scsi_idlun my_scsi_id;
325 for (k = 0; k < conf->max_devs; k++) {
326 strcpy(fname, "/dev/sd");
328 buff[0] = 'a' + (char) k;
331 } else if (k <= 255) { /* assumes sequence goes x,y,z,aa,ab,ac etc */
333 little = k - (26 * big);
336 buff[0] = 'a' + (char) big;
337 buff[1] = 'a' + (char) little;
341 strcat(fname, "xxxx");
343 if ((fd = open(fname, O_RDONLY)) < 0)
346 res = ioctl(fd, SCSI_IOCTL_GET_IDLUN, &my_scsi_id);
349 printf("Could not get scsi idlun\n");
353 res = ioctl(fd, SCSI_IOCTL_GET_BUS_NUMBER, &host_no);
356 printf("Could not get host_no\n");
362 strcpy(all_scsi_ids[k].dev, fname);
363 all_scsi_ids[k].scsi_id = my_scsi_id;
364 all_scsi_ids[k].host_no = host_no;
369 /* print_path style */
374 print_path(struct path * all_paths, int k, int style)
377 printf("%s ", all_paths[k].wwid);
380 printf("(%i %i %i %i) ",
381 all_paths[k].sg_id.host_no,
382 all_paths[k].sg_id.channel,
383 all_paths[k].sg_id.scsi_id, all_paths[k].sg_id.lun);
384 printf("%s ", all_paths[k].sg_dev);
385 printf("op:%i ", all_paths[k].state);
386 printf("%s ", all_paths[k].dev);
387 printf("[%.16s]\n", all_paths[k].product_id);
391 print_all_path(struct env * conf, struct path * all_paths)
394 char empty_buff[WWID_SIZE];
396 memset(empty_buff, 0, WWID_SIZE);
397 for (k = 0; k < conf->max_devs; k++) {
398 if (memcmp(empty_buff, all_paths[k].wwid, WWID_SIZE) == 0)
400 print_path(all_paths, k, ALL);
405 print_all_mp(struct path * all_paths, struct multipath * mp, int nmp)
409 for (k = 0; k <= nmp; k++) {
410 printf("%s\n", mp[k].wwid);
411 for (i = 0; i <= mp[k].npaths; i++)
412 print_path(all_paths, PINDEX(k,i), NOWWID);
417 coalesce_paths(struct env * conf, struct multipath * mp,
418 struct path * all_paths)
420 int k, i, nmp, np, already_done;
421 char empty_buff[WWID_SIZE];
425 memset(empty_buff, 0, WWID_SIZE);
427 for (k = 0; k < conf->max_devs - 1; k++) {
428 /* skip this path if no unique id has been found */
429 if (memcmp(empty_buff, all_paths[k].wwid, WWID_SIZE) == 0)
433 for (i = 0; i <= nmp; i++) {
434 if (0 == strcmp(mp[i].wwid, all_paths[k].wwid))
444 strcpy(mp[nmp].wwid, all_paths[k].wwid);
447 for (i = k + 1; i < conf->max_devs; i++) {
448 if (0 == strcmp(all_paths[k].wwid, all_paths[i].wwid)) {
459 get_disk_size (struct env * conf, char * dev) {
462 char attr_path[FILE_NAME_SIZE];
463 char buff[FILE_NAME_SIZE];
464 char basedev[FILE_NAME_SIZE];
466 if(conf->with_sysfs) {
467 basename(dev, basedev);
468 sprintf(attr_path, "%s/block/%s/size",
469 conf->sysfs_path, basedev);
470 if (0 > sysfs_read_attribute_value(attr_path, buff,
471 FILE_NAME_SIZE * sizeof(char)))
476 if ((fd = open(dev, O_RDONLY)) < 0)
478 if(!ioctl(fd, BLKGETSIZE, &size))
485 make_dm_node(char * str)
488 char buff[FILE_NAME_SIZE];
489 struct dm_names * names;
493 if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
496 if (!dm_task_run(dmt))
499 if (!(names = dm_task_get_names(dmt)))
508 if (0 == strcmp(names->name, str))
511 names = (void *) names + next;
514 sprintf(buff, "/dev/mapper/%s", str);
516 mknod(buff, 0600 | S_IFBLK, names->dev);
519 dm_task_destroy(dmt);
526 del_map(char * str) {
529 if (!(dmt = dm_task_create(DM_DEVICE_REMOVE)))
531 if (!dm_task_set_name(dmt, str))
533 if (!dm_task_run(dmt))
536 printf("Deleted device map : %s\n", str);
539 dm_task_destroy(dmt);
545 add_map(struct env * conf, struct path * all_paths,
546 struct multipath * mp, int index, int op)
554 if (!(dmt = dm_task_create(op)))
557 if (!dm_task_set_name(dmt, mp[index].wwid))
559 params_p = ¶ms[0];
562 for (i=0; i<=mp[index].npaths; i++) {
563 if ((1 == all_paths[PINDEX(index,i)].state) &&
564 (0 == all_paths[PINDEX(index,i)].sg_id.scsi_type))
569 params_p += sprintf(params_p, "%i 32", np);
571 for (i=0; i<=mp[index].npaths; i++) {
572 if (( 0 == all_paths[PINDEX(index,i)].state) ||
573 (0 != all_paths[PINDEX(index,i)].sg_id.scsi_type))
576 size = get_disk_size(conf, all_paths[PINDEX(index,0)].dev);
577 params_p += sprintf(params_p, " %s %i",
578 all_paths[PINDEX(index,i)].dev, 0);
585 if (op == DM_DEVICE_RELOAD)
587 if (op == DM_DEVICE_CREATE)
589 printf("%s : 0 %li %s %s\n",
590 mp[index].wwid, size, DM_TARGET, params);
593 if (!dm_task_add_target(dmt, 0, size, DM_TARGET, params))
596 if (!dm_task_run(dmt))
600 make_dm_node(mp[index].wwid);
603 dm_task_destroy(dmt);
609 get_table(const char * str)
614 uint64_t start, length;
615 char *target_type = NULL;
618 if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
621 if (!dm_task_set_name(dmt, str))
624 if (!dm_task_run(dmt))
628 next = dm_get_next_target(dmt, next, &start, &length,
629 &target_type, ¶ms);
631 printf("%" PRIu64 " %" PRIu64 " %s %s\n",
632 start, length, target_type, params);
639 dm_task_destroy(dmt);
646 map_present(char * str)
650 struct dm_names *names;
653 if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
656 if (!dm_task_run(dmt))
659 if (!(names = dm_task_get_names(dmt)))
667 if (0 == strcmp(names->name, str))
670 names = (void *) names + next;
674 dm_task_destroy(dmt);
679 usage(char * progname)
681 fprintf(stderr, VERSION_STRING);
682 fprintf(stderr, "Usage: %s [-v|-q] [-d] [-m max_devs]\n", progname);
683 fprintf(stderr, "\t-v\t\tverbose, print all paths and multipaths\n");
684 fprintf(stderr, "\t-q\t\tquiet, no output at all\n");
685 fprintf(stderr, "\t-d\t\tdry run, do not create or update devmaps\n");
686 fprintf(stderr, "\t-m max_devs\tscan {max_devs} devices at most\n");
691 filepresent(char * run) {
700 main(int argc, char *argv[])
702 char * run = "/var/run/multipath.run";
703 char * resched = "/var/run/multipath.reschedule";
704 struct multipath * mp;
705 struct path * all_paths;
706 struct scsi_dev * all_scsi_ids;
710 /* Default behaviour */
711 conf.max_devs = MAX_DEVS;
712 conf.dry_run = 0; /* 1 == Do not Create/Update devmaps */
713 conf.verbose = 0; /* 1 == Print all_paths and mp */
714 conf.quiet = 0; /* 1 == Do not even print devmaps */
715 conf.with_sysfs = 0; /* Default to compat / suboptimal behaviour */
717 /* kindly provided by libsysfs */
718 if (0 == sysfs_get_mnt_path(conf.sysfs_path, FILE_NAME_SIZE))
721 for (i = 1; i < argc; ++i) {
722 if (0 == strcmp("-v", argv[i])) {
726 } else if (0 == strcmp("-m", argv[i])) {
727 conf.max_devs = atoi(argv[++i]);
728 if (conf.max_devs < 2)
730 } else if (0 == strcmp("-q", argv[i])) {
731 if (conf.verbose == 1)
734 } else if (0 == strcmp("-d", argv[i]))
736 else if (*argv[i] == '-') {
737 fprintf(stderr, "Unknown switch: %s\n", argv[i]);
739 } else if (*argv[i] != '-') {
740 fprintf(stderr, "Unknown argument\n");
746 if (filepresent(run)) {
748 fprintf(stderr, "Already running.\n");
749 fprintf(stderr, "If you know what you do, please ");
750 fprintf(stderr, "remove %s\n", run);
752 /* leave a trace that we were called while already running */
753 open(resched, O_CREAT);
757 /* dynamic allocations */
758 mp = malloc(conf.max_devs * sizeof(struct multipath));
759 all_paths = malloc(conf.max_devs * sizeof(struct path));
760 all_scsi_ids = malloc(conf.max_devs * sizeof(struct scsi_dev));
761 if (mp == NULL || all_paths == NULL || all_scsi_ids == NULL) {
766 if(!open(run, O_CREAT))
769 if (!conf.with_sysfs) {
770 get_all_scsi_ids(&conf, all_scsi_ids);
771 get_all_paths_nosysfs(&conf, all_paths, all_scsi_ids);
773 get_all_paths_sysfs(&conf, all_paths);
775 nmp = coalesce_paths(&conf, mp, all_paths);
778 print_all_path(&conf, all_paths);
779 fprintf(stdout, "\n");
780 print_all_mp(all_paths, mp, nmp);
781 fprintf(stdout, "\n");
789 for (k=0; k<=nmp; k++) {
790 if (map_present(mp[k].wwid)) {
791 add_map(&conf, all_paths, mp, k, DM_DEVICE_RELOAD);
793 add_map(&conf, all_paths, mp, k, DM_DEVICE_CREATE);
798 /* start again if we were ask to during this process run */
799 /* ie. do not loose an event-asked run */
800 if (filepresent(resched)) {