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>
22 #include "devmapper.h"
25 #define LOOPS_PER_SEC 5
27 #define UUID_PREFIX "mpath-"
28 #define UUID_PREFIX_LEN 6
31 dm_dummy_log (int level, const char *file, int line, const char *f, ...)
45 dm_log_init(&dm_dummy_log);
53 int minv[3] = {1, 2, 11};
55 dm_get_library_version(version, sizeof(version));
56 condlog(3, "libdevmapper version %s", version);
57 sscanf(version, "%d.%d.%d ", &v[0], &v[1], &v[2]);
59 if ((v[0] > minv[0]) ||
60 ((v[0] == minv[0]) && (v[1] > minv[1])) ||
61 ((v[0] == minv[0]) && (v[1] == minv[1]) && (v[2] >= minv[2])))
63 condlog(0, "libdevmapper version must be >= %d.%.2d.%.2d",
64 minv[0], minv[1], minv[2]);
69 dm_drvprereq (char * str)
73 struct dm_versions *target;
74 struct dm_versions *last_target;
75 int minv[3] = {1, 0, 3};
78 if (!(dmt = dm_task_create(DM_DEVICE_LIST_VERSIONS)))
81 dm_task_no_open_count(dmt);
83 if (!dm_task_run(dmt)) {
84 condlog(0, "Can not communicate with kernel DM");
87 target = dm_task_get_versions(dmt);
91 if (!strncmp(str, target->name, strlen(str))) {
95 target = (void *) target + target->next;
96 } while (last_target != target);
99 condlog(0, "DM multipath kernel driver not loaded");
103 if ((v[0] > minv[0]) ||
104 ((v[0] == minv[0]) && (v[1] > minv[1])) ||
105 ((v[0] == minv[0]) && (v[1] == minv[1]) && (v[2] >= minv[2]))) {
109 condlog(0, "DM multipath kernel driver must be >= %u.%.2u.%.2u",
110 minv[0], minv[1], minv[2]);
112 dm_task_destroy(dmt);
117 dm_prereq (char * str)
121 return dm_drvprereq(str);
125 dm_simplecmd (int task, const char *name) {
129 if (!(dmt = dm_task_create (task)))
132 if (!dm_task_set_name (dmt, name))
135 dm_task_no_open_count(dmt);
136 dm_task_skip_lockfs(dmt); /* for DM_DEVICE_RESUME */
137 dm_task_no_flush(dmt); /* for DM_DEVICE_SUSPEND/RESUME */
139 r = dm_task_run (dmt);
142 dm_task_destroy (dmt);
147 dm_addmap (int task, const char *name, const char *target,
148 const char *params, unsigned long long size, const char *uuid) {
151 char *prefixed_uuid = NULL;
153 if (!(dmt = dm_task_create (task)))
156 if (!dm_task_set_name (dmt, name))
159 if (!dm_task_add_target (dmt, 0, size, target, params))
163 prefixed_uuid = MALLOC(UUID_PREFIX_LEN + strlen(uuid) + 1);
164 if (!prefixed_uuid) {
165 condlog(0, "cannot create prefixed uuid : %s\n",
169 sprintf(prefixed_uuid, UUID_PREFIX "%s", uuid);
170 if (!dm_task_set_uuid(dmt, prefixed_uuid))
174 dm_task_no_open_count(dmt);
176 r = dm_task_run (dmt);
183 dm_task_destroy (dmt);
188 dm_map_present (char * str)
194 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
197 if (!dm_task_set_name(dmt, str))
200 dm_task_no_open_count(dmt);
202 if (!dm_task_run(dmt))
205 if (!dm_task_get_info(dmt, &info))
211 dm_task_destroy(dmt);
216 dm_get_map(char * name, unsigned long long * size, char * outparams)
221 uint64_t start, length;
222 char *target_type = NULL;
225 if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
228 if (!dm_task_set_name(dmt, name))
231 dm_task_no_open_count(dmt);
233 if (!dm_task_run(dmt))
236 /* Fetch 1st target */
237 next = dm_get_next_target(dmt, next, &start, &length,
238 &target_type, ¶ms);
243 if (snprintf(outparams, PARAMS_SIZE, "%s", params) <= PARAMS_SIZE)
246 dm_task_destroy(dmt);
251 dm_get_uuid(char *name, char *uuid)
257 dmt = dm_task_create(DM_DEVICE_INFO);
261 if (!dm_task_set_name (dmt, name))
264 if (!dm_task_run(dmt))
267 uuidtmp = dm_task_get_uuid(dmt);
269 if (!strncmp(uuidtmp, UUID_PREFIX, UUID_PREFIX_LEN))
270 strcpy(uuid, uuidtmp + UUID_PREFIX_LEN);
272 strcpy(uuid, uuidtmp);
279 dm_task_destroy(dmt);
284 dm_get_status(char * name, char * outstatus)
289 uint64_t start, length;
293 if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
296 if (!dm_task_set_name(dmt, name))
299 dm_task_no_open_count(dmt);
301 if (!dm_task_run(dmt))
304 /* Fetch 1st target */
305 next = dm_get_next_target(dmt, next, &start, &length,
306 &target_type, &status);
308 if (snprintf(outstatus, PARAMS_SIZE, "%s", status) <= PARAMS_SIZE)
312 condlog(0, "%s: error getting map status string", name);
314 dm_task_destroy(dmt);
325 dm_type(char * name, char * type)
330 uint64_t start, length;
331 char *target_type = NULL;
334 if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
337 if (!dm_task_set_name(dmt, name))
340 dm_task_no_open_count(dmt);
342 if (!dm_task_run(dmt))
345 /* Fetch 1st target */
346 next = dm_get_next_target(dmt, next, &start, &length,
347 &target_type, ¶ms);
351 else if (!strcmp(target_type, type))
355 dm_task_destroy(dmt);
360 dm_dev_t (char * mapname, char * dev_t, int len)
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))
379 if (snprintf(dev_t, len, "%i:%i", info.major, info.minor) > len)
384 dm_task_destroy(dmt);
389 dm_get_opencount (char * mapname)
395 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
398 if (!dm_task_set_name(dmt, mapname))
401 if (!dm_task_run(dmt))
404 if (!dm_task_get_info(dmt, &info))
409 dm_task_destroy(dmt);
414 dm_get_minor (char * mapname)
420 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
423 if (!dm_task_set_name(dmt, mapname))
426 if (!dm_task_run(dmt))
429 if (!dm_task_get_info(dmt, &info))
434 dm_task_destroy(dmt);
439 dm_flush_map (char * mapname, char * type)
443 if (!dm_map_present(mapname))
446 if (dm_type(mapname, type) <= 0)
449 if (dm_remove_partmaps(mapname))
452 if (dm_get_opencount(mapname)) {
453 condlog(2, "%s: map in use", mapname);
457 r = dm_simplecmd(DM_DEVICE_REMOVE, mapname);
460 condlog(4, "multipath map %s removed", mapname);
467 dm_flush_maps (char * type)
471 struct dm_names *names;
474 if (!(dmt = dm_task_create (DM_DEVICE_LIST)))
477 dm_task_no_open_count(dmt);
479 if (!dm_task_run (dmt))
482 if (!(names = dm_task_get_names (dmt)))
489 r += dm_flush_map(names->name, type);
491 names = (void *) names + next;
495 dm_task_destroy (dmt);
500 dm_message(char * mapname, char * message)
505 if (!(dmt = dm_task_create(DM_DEVICE_TARGET_MSG)))
508 if (!dm_task_set_name(dmt, mapname))
511 if (!dm_task_set_sector(dmt, 0))
514 if (!dm_task_set_message(dmt, message))
517 dm_task_no_open_count(dmt);
519 if (!dm_task_run(dmt))
525 condlog(0, "DM message failed [%s]", message);
527 dm_task_destroy(dmt);
532 dm_fail_path(char * mapname, char * path)
536 if (snprintf(message, 32, "fail_path %s\n", path) > 32)
539 return dm_message(mapname, message);
543 dm_reinstate_path(char * mapname, char * path)
547 if (snprintf(message, 32, "reinstate_path %s\n", path) > 32)
550 return dm_message(mapname, message);
554 dm_queue_if_no_path(char *mapname, int enable)
559 message = "queue_if_no_path\n";
561 message = "fail_if_no_path\n";
563 return dm_message(mapname, message);
567 dm_groupmsg (char * msg, char * mapname, int index)
571 if (snprintf(message, 32, "%s_group %i\n", msg, index) > 32)
574 return dm_message(mapname, message);
578 dm_switchgroup(char * mapname, int index)
580 return dm_groupmsg("switch", mapname, index);
584 dm_enablegroup(char * mapname, int index)
586 return dm_groupmsg("enable", mapname, index);
590 dm_disablegroup(char * mapname, int index)
592 return dm_groupmsg("disable", mapname, index);
596 dm_get_maps (vector mp, char * type)
598 struct multipath * mpp;
602 struct dm_names *names;
608 if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
611 dm_task_no_open_count(dmt);
613 if (!dm_task_run(dmt))
616 if (!(names = dm_task_get_names(dmt)))
620 r = 0; /* this is perfectly valid */
625 info = dm_type(names->name, type);
630 mpp = alloc_multipath();
635 mpp->alias = STRDUP(names->name);
641 if (dm_get_map(names->name, &mpp->size, mpp->params))
644 if (dm_get_status(names->name, mpp->status))
647 dm_get_uuid(names->name, mpp->wwid);
648 dm_get_info(names->name, &mpp->dmi);
651 if (!vector_alloc_slot(mp))
654 vector_set_slot(mp, mpp);
658 names = (void *) names + next;
664 free_multipath(mpp, KEEP_PATHS);
666 dm_task_destroy (dmt);
671 dm_get_name(char *uuid, char *type, char *name)
674 struct multipath *mpp;
677 vec = vector_alloc();
682 if (dm_get_maps(vec, type)) {
687 vector_foreach_slot(vec, mpp, i) {
688 if (!strcmp(uuid, mpp->wwid)) {
690 strcpy(name, mpp->alias);
700 dm_geteventnr (char *name)
705 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
708 if (!dm_task_set_name(dmt, name))
711 dm_task_no_open_count(dmt);
713 if (!dm_task_run(dmt))
716 if (!dm_task_get_info(dmt, &info)) {
727 dm_task_destroy(dmt);
729 return info.event_nr;
733 dm_mapname(int major, int minor)
735 char * response = NULL;
739 int loop = MAX_WAIT * LOOPS_PER_SEC;
741 if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
744 if (!dm_task_set_major(dmt, major) ||
745 !dm_task_set_minor(dmt, minor))
748 dm_task_no_open_count(dmt);
751 * device map might not be ready when we get here from
752 * daemon uev_trigger -> uev_add_map
756 r = dm_task_run(dmt);
762 usleep(1000 * 1000 / LOOPS_PER_SEC);
766 condlog(0, "%i:%i: timeout fetching map name", major, minor);
770 map = dm_task_get_name(dmt);
771 if (map && strlen(map))
772 response = STRDUP((char *)dm_task_get_name(dmt));
774 dm_task_destroy(dmt);
777 dm_task_destroy(dmt);
778 condlog(0, "%i:%i: error fetching map name", major, minor);
783 dm_remove_partmaps (char * mapname)
786 struct dm_names *names;
788 char params[PARAMS_SIZE];
789 unsigned long long size;
793 if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
796 dm_task_no_open_count(dmt);
798 if (!dm_task_run(dmt))
801 if (!(names = dm_task_get_names(dmt)))
805 r = 0; /* this is perfectly valid */
809 if (dm_dev_t(mapname, &dev_t[0], 32))
815 * if devmap target is "linear"
817 (dm_type(names->name, "linear") > 0) &&
820 * and the multipath mapname and the part mapname start
823 !strncmp(names->name, mapname, strlen(mapname)) &&
826 * and the opencount is 0 for us to allow removal
828 !dm_get_opencount(names->name) &&
831 * and we can fetch the map table from the kernel
833 !dm_get_map(names->name, &size, ¶ms[0]) &&
836 * and the table maps over the multipath map
838 strstr(params, dev_t)
841 * then it's a kpartx generated partition.
844 condlog(4, "partition map %s removed",
846 dm_simplecmd(DM_DEVICE_REMOVE, names->name);
850 names = (void *) names + next;
855 dm_task_destroy (dmt);
859 static struct dm_info *
862 return MALLOC(sizeof(struct dm_info));
866 dm_get_info (char * mapname, struct dm_info ** dmi)
869 struct dm_task *dmt = NULL;
875 *dmi = alloc_dminfo();
880 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
883 if (!dm_task_set_name(dmt, mapname))
886 dm_task_no_open_count(dmt);
888 if (!dm_task_run(dmt))
891 if (!dm_task_get_info(dmt, *dmi))
897 memset(*dmi, 0, sizeof(struct dm_info));
900 dm_task_destroy(dmt);
906 dm_rename_partmaps (char * old, char * new)
909 struct dm_names *names;
911 char buff[PARAMS_SIZE];
912 unsigned long long size;
916 if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
919 dm_task_no_open_count(dmt);
921 if (!dm_task_run(dmt))
924 if (!(names = dm_task_get_names(dmt)))
928 r = 0; /* this is perfectly valid */
932 if (dm_dev_t(old, &dev_t[0], 32))
938 * if devmap target is "linear"
940 (dm_type(names->name, "linear") > 0) &&
943 * and the multipath mapname and the part mapname start
946 !strncmp(names->name, old, strlen(old)) &&
949 * and we can fetch the map table from the kernel
951 !dm_get_map(names->name, &size, &buff[0]) &&
954 * and the table maps over the multipath map
959 * then it's a kpartx generated partition.
962 snprintf(buff, PARAMS_SIZE, "%s%s",
963 new, names->name + strlen(old));
964 dm_rename(names->name, buff);
965 condlog(4, "partition map %s renamed",
970 names = (void *) names + next;
975 dm_task_destroy (dmt);
980 dm_rename (char * old, char * new)
985 if (dm_rename_partmaps(old, new))
988 if (!(dmt = dm_task_create(DM_DEVICE_RENAME)))
991 if (!dm_task_set_name(dmt, old))
994 if (!dm_task_set_newname(dmt, new))
997 dm_task_no_open_count(dmt);
999 if (!dm_task_run(dmt))
1004 dm_task_destroy(dmt);