2 * snippets copied from device-mapper dmsetup.c
3 * Copyright (c) 2004, 2005 Christophe Varoqui
4 * Copyright (c) 2005 Kiyoshi Ueda, NEC
5 * Copyright (c) 2005 Patrick Caulfield, Redhat
10 #include <libdevmapper.h>
12 #include <linux/kdev_t.h>
21 #include "devmapper.h"
24 #define LOOPS_PER_SEC 5
27 dm_dummy_log (int level, const char *file, int line, const char *f, ...)
41 dm_log_init(&dm_dummy_log);
45 dm_prereq (char * str, int x, int y, int z)
49 struct dm_versions *target;
50 struct dm_versions *last_target;
52 if (!(dmt = dm_task_create(DM_DEVICE_LIST_VERSIONS)))
55 dm_task_no_open_count(dmt);
57 if (!dm_task_run(dmt)) {
58 condlog(0, "Can not communicate with kernel DM");
62 target = dm_task_get_versions(dmt);
67 if (!strncmp(str, target->name, strlen(str))) {
70 if (target->version[0] >= x &&
71 target->version[1] >= y &&
72 target->version[2] >= z)
78 target = (void *) target + target->next;
79 } while (last_target != target);
82 condlog(0, "DM multipath kernel driver not loaded");
84 condlog(0, "DM multipath kernel driver version too old");
92 dm_simplecmd (int task, const char *name) {
96 if (!(dmt = dm_task_create (task)))
99 if (!dm_task_set_name (dmt, name))
102 dm_task_no_open_count(dmt);
104 r = dm_task_run (dmt);
107 dm_task_destroy (dmt);
112 dm_addmap (int task, const char *name, const char *target,
113 const char *params, unsigned long long size, const char *uuid) {
117 if (!(dmt = dm_task_create (task)))
120 if (!dm_task_set_name (dmt, name))
123 if (!dm_task_add_target (dmt, 0, size, target, params))
126 if (uuid && !dm_task_set_uuid(dmt, uuid))
129 dm_task_no_open_count(dmt);
131 r = dm_task_run (dmt);
134 dm_task_destroy (dmt);
139 dm_map_present (char * str)
145 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
148 if (!dm_task_set_name(dmt, str))
151 dm_task_no_open_count(dmt);
153 if (!dm_task_run(dmt))
156 if (!dm_task_get_info(dmt, &info))
162 dm_task_destroy(dmt);
167 dm_get_map(char * name, unsigned long long * size, char * outparams)
172 uint64_t start, length;
173 char *target_type = NULL;
176 if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
179 if (!dm_task_set_name(dmt, name))
182 dm_task_no_open_count(dmt);
184 if (!dm_task_run(dmt))
187 /* Fetch 1st target */
188 next = dm_get_next_target(dmt, next, &start, &length,
189 &target_type, ¶ms);
194 if (snprintf(outparams, PARAMS_SIZE, "%s", params) <= PARAMS_SIZE)
197 dm_task_destroy(dmt);
202 dm_get_uuid(char *name, char *uuid)
207 dmt = dm_task_create(DM_DEVICE_INFO);
211 if (!dm_task_set_name (dmt, name))
214 if (!dm_task_run(dmt))
217 uuidtmp = dm_task_get_uuid(dmt);
219 strcpy(uuid, uuidtmp);
224 dm_task_destroy(dmt);
230 dm_get_status(char * name, char * outstatus)
235 uint64_t start, length;
239 if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
242 if (!dm_task_set_name(dmt, name))
245 dm_task_no_open_count(dmt);
247 if (!dm_task_run(dmt))
250 /* Fetch 1st target */
251 next = dm_get_next_target(dmt, next, &start, &length,
252 &target_type, &status);
254 if (snprintf(outstatus, PARAMS_SIZE, "%s", status) <= PARAMS_SIZE)
258 condlog(0, "%s: error getting map status string", name);
260 dm_task_destroy(dmt);
271 dm_type(char * name, char * type)
276 uint64_t start, length;
277 char *target_type = NULL;
280 if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
283 if (!dm_task_set_name(dmt, name))
286 dm_task_no_open_count(dmt);
288 if (!dm_task_run(dmt))
291 /* Fetch 1st target */
292 next = dm_get_next_target(dmt, next, &start, &length,
293 &target_type, ¶ms);
297 else if (!strcmp(target_type, type))
301 dm_task_destroy(dmt);
306 dm_dev_t (char * mapname, char * dev_t, int len)
312 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
315 if (!dm_task_set_name(dmt, mapname))
318 if (!dm_task_run(dmt))
321 if (!dm_task_get_info(dmt, &info))
325 if (snprintf(dev_t, len, "%i:%i", info.major, info.minor) > len)
330 dm_task_destroy(dmt);
335 dm_get_opencount (char * mapname)
341 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
344 if (!dm_task_set_name(dmt, mapname))
347 if (!dm_task_run(dmt))
350 if (!dm_task_get_info(dmt, &info))
355 dm_task_destroy(dmt);
360 dm_get_minor (char * mapname)
366 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
369 if (!dm_task_set_name(dmt, mapname))
372 if (!dm_task_run(dmt))
375 if (!dm_task_get_info(dmt, &info))
380 dm_task_destroy(dmt);
385 dm_flush_map (char * mapname, char * type)
389 if (!dm_map_present(mapname))
392 if (dm_type(mapname, type) <= 0)
395 if (dm_remove_partmaps(mapname))
398 if (dm_get_opencount(mapname)) {
399 condlog(2, "%s: map in use", mapname);
403 r = dm_simplecmd(DM_DEVICE_REMOVE, mapname);
406 condlog(4, "multipath map %s removed", mapname);
413 dm_flush_maps (char * type)
417 struct dm_names *names;
420 if (!(dmt = dm_task_create (DM_DEVICE_LIST)))
423 dm_task_no_open_count(dmt);
425 if (!dm_task_run (dmt))
428 if (!(names = dm_task_get_names (dmt)))
435 r += dm_flush_map(names->name, type);
437 names = (void *) names + next;
441 dm_task_destroy (dmt);
446 dm_message(char * mapname, char * message)
451 if (!(dmt = dm_task_create(DM_DEVICE_TARGET_MSG)))
454 if (!dm_task_set_name(dmt, mapname))
457 if (!dm_task_set_sector(dmt, 0))
460 if (!dm_task_set_message(dmt, message))
463 dm_task_no_open_count(dmt);
465 if (!dm_task_run(dmt))
471 condlog(0, "DM message failed [%s]", message);
473 dm_task_destroy(dmt);
478 dm_fail_path(char * mapname, char * path)
482 if (snprintf(message, 32, "fail_path %s\n", path) > 32)
485 return dm_message(mapname, message);
489 dm_reinstate_path(char * mapname, char * path)
493 if (snprintf(message, 32, "reinstate_path %s\n", path) > 32)
496 return dm_message(mapname, message);
500 dm_queue_if_no_path(char *mapname, int enable)
505 message = "queue_if_no_path\n";
507 message = "fail_if_no_path\n";
509 return dm_message(mapname, message);
513 dm_groupmsg (char * msg, char * mapname, int index)
517 if (snprintf(message, 32, "%s_group %i\n", msg, index) > 32)
520 return dm_message(mapname, message);
524 dm_switchgroup(char * mapname, int index)
526 return dm_groupmsg("switch", mapname, index);
530 dm_enablegroup(char * mapname, int index)
532 return dm_groupmsg("enable", mapname, index);
536 dm_disablegroup(char * mapname, int index)
538 return dm_groupmsg("disable", mapname, index);
542 dm_get_maps (vector mp, char * type)
544 struct multipath * mpp;
548 struct dm_names *names;
554 if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
557 dm_task_no_open_count(dmt);
559 if (!dm_task_run(dmt))
562 if (!(names = dm_task_get_names(dmt)))
566 r = 0; /* this is perfectly valid */
571 info = dm_type(names->name, type);
576 mpp = alloc_multipath();
581 mpp->alias = STRDUP(names->name);
587 if (dm_get_map(names->name, &mpp->size, mpp->params))
590 if (dm_get_status(names->name, mpp->status))
593 dm_get_uuid(names->name, mpp->wwid);
596 if (!vector_alloc_slot(mp))
599 vector_set_slot(mp, mpp);
603 names = (void *) names + next;
609 free_multipath(mpp, KEEP_PATHS);
611 dm_task_destroy (dmt);
616 dm_get_name(char *uuid, char *type, char *name)
619 struct multipath *mpp;
622 vec = vector_alloc();
627 if (dm_get_maps(vec, type)) {
632 vector_foreach_slot(vec, mpp, i) {
633 if (!strcmp(uuid, mpp->wwid)) {
635 strcpy(name, mpp->alias);
645 dm_geteventnr (char *name)
650 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
653 if (!dm_task_set_name(dmt, name))
656 dm_task_no_open_count(dmt);
658 if (!dm_task_run(dmt))
661 if (!dm_task_get_info(dmt, &info)) {
672 dm_task_destroy(dmt);
674 return info.event_nr;
678 dm_mapname(int major, int minor)
680 char * response = NULL;
684 int loop = MAX_WAIT * LOOPS_PER_SEC;
686 if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
689 if (!dm_task_set_major(dmt, major) ||
690 !dm_task_set_minor(dmt, minor))
693 dm_task_no_open_count(dmt);
696 * device map might not be ready when we get here from
697 * daemon uev_trigger -> uev_add_map
701 r = dm_task_run(dmt);
707 usleep(1000 * 1000 / LOOPS_PER_SEC);
711 condlog(0, "%i:%i: timeout fetching map name", major, minor);
715 map = dm_task_get_name(dmt);
716 if (map && strlen(map))
717 response = STRDUP((char *)dm_task_get_name(dmt));
719 dm_task_destroy(dmt);
722 dm_task_destroy(dmt);
723 condlog(0, "%i:%i: error fetching map name", major, minor);
728 dm_remove_partmaps (char * mapname)
731 struct dm_names *names;
733 char params[PARAMS_SIZE];
734 unsigned long long size;
738 if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
741 dm_task_no_open_count(dmt);
743 if (!dm_task_run(dmt))
746 if (!(names = dm_task_get_names(dmt)))
750 r = 0; /* this is perfectly valid */
754 if (dm_dev_t(mapname, &dev_t[0], 32))
760 * if devmap target is "linear"
762 (dm_type(names->name, "linear") > 0) &&
765 * and the multipath mapname and the part mapname start
768 !strncmp(names->name, mapname, strlen(mapname)) &&
771 * and the opencount is 0 for us to allow removal
773 !dm_get_opencount(names->name) &&
776 * and we can fetch the map table from the kernel
778 !dm_get_map(names->name, &size, ¶ms[0]) &&
781 * and the table maps over the multipath map
783 strstr(params, dev_t)
786 * then it's a kpartx generated partition.
789 condlog(4, "partition map %s removed",
791 dm_simplecmd(DM_DEVICE_REMOVE, names->name);
795 names = (void *) names + next;
800 dm_task_destroy (dmt);
804 static struct dm_info *
807 return MALLOC(sizeof(struct dm_info));
811 dm_get_info (char * mapname, struct dm_info ** dmi)
814 struct dm_task *dmt = NULL;
820 *dmi = alloc_dminfo();
825 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
828 if (!dm_task_set_name(dmt, mapname))
831 dm_task_no_open_count(dmt);
833 if (!dm_task_run(dmt))
836 if (!dm_task_get_info(dmt, *dmi))
842 memset(*dmi, 0, sizeof(struct dm_info));
845 dm_task_destroy(dmt);
851 dm_rename_partmaps (char * old, char * new)
854 struct dm_names *names;
856 char buff[PARAMS_SIZE];
857 unsigned long long size;
861 if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
864 dm_task_no_open_count(dmt);
866 if (!dm_task_run(dmt))
869 if (!(names = dm_task_get_names(dmt)))
873 r = 0; /* this is perfectly valid */
877 if (dm_dev_t(old, &dev_t[0], 32))
883 * if devmap target is "linear"
885 (dm_type(names->name, "linear") > 0) &&
888 * and the multipath mapname and the part mapname start
891 !strncmp(names->name, old, strlen(old)) &&
894 * and we can fetch the map table from the kernel
896 !dm_get_map(names->name, &size, &buff[0]) &&
899 * and the table maps over the multipath map
904 * then it's a kpartx generated partition.
907 snprintf(buff, PARAMS_SIZE, "%s%s",
908 new, names->name + strlen(old));
909 dm_rename(names->name, buff);
910 condlog(4, "partition map %s renamed",
915 names = (void *) names + next;
920 dm_task_destroy (dmt);
925 dm_rename (char * old, char * new)
930 if (dm_rename_partmaps(old, new))
933 if (!(dmt = dm_task_create(DM_DEVICE_RENAME)))
936 if (!dm_task_set_name(dmt, old))
939 if (!dm_task_set_newname(dmt, new))
942 dm_task_no_open_count(dmt);
944 if (!dm_task_run(dmt))
949 dm_task_destroy(dmt);