4 #include <libdevmapper.h>
6 #include <linux/kdev_t.h>
13 #include "devmapper.h"
16 #define LOOPS_PER_SEC 5
19 dm_dummy_log (int level, const char *file, int line, const char *f, ...)
33 dm_log_init(&dm_dummy_log);
37 dm_prereq (char * str, int x, int y, int z)
41 struct dm_versions *target;
42 struct dm_versions *last_target;
44 if (!(dmt = dm_task_create(DM_DEVICE_LIST_VERSIONS)))
47 dm_task_no_open_count(dmt);
49 if (!dm_task_run(dmt)) {
50 condlog(0, "Can not communicate with kernel DM");
54 target = dm_task_get_versions(dmt);
59 if (!strncmp(str, target->name, strlen(str))) {
62 if (target->version[0] >= x &&
63 target->version[1] >= y &&
64 target->version[2] >= z)
70 target = (void *) target + target->next;
71 } while (last_target != target);
74 condlog(0, "DM multipath kernel driver not loaded");
76 condlog(0, "DM multipath kernel driver version too old");
84 dm_simplecmd (int task, const char *name) {
88 if (!(dmt = dm_task_create (task)))
91 if (!dm_task_set_name (dmt, name))
94 dm_task_no_open_count(dmt);
96 r = dm_task_run (dmt);
99 dm_task_destroy (dmt);
104 dm_addmap (int task, const char *name, const char *target,
105 const char *params, unsigned long long size, const char *uuid) {
109 if (!(dmt = dm_task_create (task)))
112 if (!dm_task_set_name (dmt, name))
115 if (!dm_task_add_target (dmt, 0, size, target, params))
118 if (uuid && !dm_task_set_uuid(dmt, uuid))
121 dm_task_no_open_count(dmt);
123 r = dm_task_run (dmt);
126 dm_task_destroy (dmt);
131 dm_map_present (char * str)
137 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
140 if (!dm_task_set_name(dmt, str))
143 dm_task_no_open_count(dmt);
145 if (!dm_task_run(dmt))
148 if (!dm_task_get_info(dmt, &info))
154 dm_task_destroy(dmt);
159 dm_get_map(char * name, unsigned long long * size, char * outparams)
164 uint64_t start, length;
165 char *target_type = NULL;
168 if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
171 if (!dm_task_set_name(dmt, name))
174 dm_task_no_open_count(dmt);
176 if (!dm_task_run(dmt))
179 /* Fetch 1st target */
180 next = dm_get_next_target(dmt, next, &start, &length,
181 &target_type, ¶ms);
186 if (snprintf(outparams, PARAMS_SIZE, "%s", params) <= PARAMS_SIZE)
189 dm_task_destroy(dmt);
194 dm_get_uuid(char *name, char *uuid)
199 dmt = dm_task_create(DM_DEVICE_INFO);
203 if (!dm_task_set_name (dmt, name))
206 if (!dm_task_run(dmt))
209 uuidtmp = dm_task_get_uuid(dmt);
211 strcpy(uuid, uuidtmp);
216 dm_task_destroy(dmt);
222 dm_get_status(char * name, char * outstatus)
227 uint64_t start, length;
231 if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
234 if (!dm_task_set_name(dmt, name))
237 dm_task_no_open_count(dmt);
239 if (!dm_task_run(dmt))
242 /* Fetch 1st target */
243 next = dm_get_next_target(dmt, next, &start, &length,
244 &target_type, &status);
246 if (snprintf(outstatus, PARAMS_SIZE, "%s", status) <= PARAMS_SIZE)
250 condlog(0, "%s: error getting map status string", name);
252 dm_task_destroy(dmt);
263 dm_type(char * name, char * type)
268 uint64_t start, length;
269 char *target_type = NULL;
272 if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
275 if (!dm_task_set_name(dmt, name))
278 dm_task_no_open_count(dmt);
280 if (!dm_task_run(dmt))
283 /* Fetch 1st target */
284 next = dm_get_next_target(dmt, next, &start, &length,
285 &target_type, ¶ms);
289 else if (!strcmp(target_type, type))
293 dm_task_destroy(dmt);
298 dm_dev_t (char * mapname, char * dev_t, int len)
304 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
307 if (!dm_task_set_name(dmt, mapname))
310 if (!dm_task_run(dmt))
313 if (!dm_task_get_info(dmt, &info))
317 if (snprintf(dev_t, len, "%i:%i", info.major, info.minor) > len)
322 dm_task_destroy(dmt);
327 dm_get_opencount (char * mapname)
333 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
336 if (!dm_task_set_name(dmt, mapname))
339 if (!dm_task_run(dmt))
342 if (!dm_task_get_info(dmt, &info))
347 dm_task_destroy(dmt);
352 dm_get_minor (char * mapname)
358 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
361 if (!dm_task_set_name(dmt, mapname))
364 if (!dm_task_run(dmt))
367 if (!dm_task_get_info(dmt, &info))
372 dm_task_destroy(dmt);
377 dm_flush_map (char * mapname, char * type)
381 if (!dm_map_present(mapname))
384 if (!dm_type(mapname, type))
387 if (dm_remove_partmaps(mapname))
390 if (dm_get_opencount(mapname)) {
391 condlog(2, "%s: map in use", mapname);
395 r = dm_simplecmd(DM_DEVICE_REMOVE, mapname);
398 condlog(4, "multipath map %s removed", mapname);
405 dm_flush_maps (char * type)
409 struct dm_names *names;
412 if (!(dmt = dm_task_create (DM_DEVICE_LIST)))
415 dm_task_no_open_count(dmt);
417 if (!dm_task_run (dmt))
420 if (!(names = dm_task_get_names (dmt)))
427 r += dm_flush_map(names->name, type);
429 names = (void *) names + next;
433 dm_task_destroy (dmt);
438 dm_fail_path(char * mapname, char * path)
444 if (!(dmt = dm_task_create(DM_DEVICE_TARGET_MSG)))
447 if (!dm_task_set_name(dmt, mapname))
450 if (!dm_task_set_sector(dmt, 0))
453 if (snprintf(str, 32, "fail_path %s\n", path) > 32)
456 if (!dm_task_set_message(dmt, str))
459 dm_task_no_open_count(dmt);
461 if (!dm_task_run(dmt))
466 dm_task_destroy(dmt);
471 dm_reinstate(char * mapname, char * path)
477 if (!(dmt = dm_task_create(DM_DEVICE_TARGET_MSG)))
480 if (!dm_task_set_name(dmt, mapname))
483 if (!dm_task_set_sector(dmt, 0))
486 if (snprintf(str, 32, "reinstate_path %s\n", path) > 32)
489 if (!dm_task_set_message(dmt, str))
492 dm_task_no_open_count(dmt);
494 if (!dm_task_run(dmt))
499 dm_task_destroy(dmt);
504 dm_queue_if_no_path(char *mapname, int enable)
511 str = "queue_if_no_path\n";
513 str = "fail_if_no_path\n";
515 if (!(dmt = dm_task_create(DM_DEVICE_TARGET_MSG)))
518 if (!dm_task_set_name(dmt, mapname))
521 if (!dm_task_set_sector(dmt, 0))
524 if (!dm_task_set_message(dmt, str))
527 dm_task_no_open_count(dmt);
529 if (!dm_task_run(dmt))
534 dm_task_destroy(dmt);
539 dm_groupmsg (char * msg, char * mapname, int index)
545 if (!(dmt = dm_task_create(DM_DEVICE_TARGET_MSG)))
548 if (!dm_task_set_name(dmt, mapname))
551 if (!dm_task_set_sector(dmt, 0))
554 snprintf(str, 24, "%s_group %i\n", msg, index);
556 if (!dm_task_set_message(dmt, str))
559 dm_task_no_open_count(dmt);
561 if (!dm_task_run(dmt))
564 condlog(3, "message %s 0 %s", mapname, str);
569 condlog(3, "message %s 0 %s failed", mapname, str);
571 dm_task_destroy(dmt);
577 dm_switchgroup(char * mapname, int index)
579 return dm_groupmsg("switch", mapname,index);
583 dm_enablegroup(char * mapname, int index)
585 return dm_groupmsg("enable", mapname,index);
589 dm_disablegroup(char * mapname, int index)
591 return dm_groupmsg("disable", mapname,index);
595 dm_get_maps (vector mp, char * type)
597 struct multipath * mpp;
601 struct dm_names *names;
607 if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
610 dm_task_no_open_count(dmt);
612 if (!dm_task_run(dmt))
615 if (!(names = dm_task_get_names(dmt)))
619 r = 0; /* this is perfectly valid */
624 info = dm_type(names->name, type);
629 mpp = alloc_multipath();
634 mpp->alias = STRDUP(names->name);
640 if (dm_get_map(names->name, &mpp->size, mpp->params))
643 if (dm_get_status(names->name, mpp->status))
646 dm_get_uuid(names->name, mpp->wwid);
649 if (!vector_alloc_slot(mp))
652 vector_set_slot(mp, mpp);
656 names = (void *) names + next;
662 free_multipath(mpp, KEEP_PATHS);
664 dm_task_destroy (dmt);
669 dm_geteventnr (char *name)
674 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
677 if (!dm_task_set_name(dmt, name))
680 dm_task_no_open_count(dmt);
682 if (!dm_task_run(dmt))
685 if (!dm_task_get_info(dmt, &info)) {
696 dm_task_destroy(dmt);
698 return info.event_nr;
702 dm_mapname(int major, int minor)
707 int loop = MAX_WAIT * LOOPS_PER_SEC;
709 if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
712 if (!dm_task_set_major(dmt, major) ||
713 !dm_task_set_minor(dmt, minor))
716 dm_task_no_open_count(dmt);
719 * device map might not be ready when we get here from
720 * daemon uev_trigger -> uev_add_map
724 r = dm_task_run(dmt);
730 usleep(1000 * 1000 / LOOPS_PER_SEC);
734 condlog(0, "%i:%i: timeout fetching map name", major, minor);
738 response = STRDUP((char *)dm_task_get_name(dmt));
739 dm_task_destroy(dmt);
742 dm_task_destroy(dmt);
743 condlog(0, "%i:%i: error fetching map name", major, minor);
748 dm_remove_partmaps (char * mapname)
751 struct dm_names *names;
753 char params[PARAMS_SIZE];
754 unsigned long long size;
758 if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
761 dm_task_no_open_count(dmt);
763 if (!dm_task_run(dmt))
766 if (!(names = dm_task_get_names(dmt)))
770 r = 0; /* this is perfectly valid */
774 if (dm_dev_t(mapname, &dev_t[0], 32))
780 * if devmap target is "linear"
782 dm_type(names->name, "linear") &&
785 * and the multipath mapname and the part mapname start
788 !strncmp(names->name, mapname, strlen(mapname)) &&
791 * and the opencount is 0 for us to allow removal
793 !dm_get_opencount(names->name) &&
796 * and we can fetch the map table from the kernel
798 !dm_get_map(names->name, &size, ¶ms[0]) &&
801 * and the table maps over the multipath map
803 strstr(params, dev_t)
806 * then it's a kpartx generated partition.
809 condlog(4, "partition map %s removed",
811 dm_simplecmd(DM_DEVICE_REMOVE, names->name);
815 names = (void *) names + next;
820 dm_task_destroy (dmt);
826 dm_rename (char * old, char * new)
831 if (!(dmt = dm_task_create(DM_DEVICE_RENAME)))
834 if (!dm_task_set_name(dmt, old))
837 if (!dm_task_set_newname(dmt, new))
840 dm_task_no_open_count(dmt);
842 if (!dm_task_run(dmt))
847 dm_task_destroy(dmt);