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 #ifdef LIBDM_API_FLUSH
138 dm_task_no_flush(dmt); /* for DM_DEVICE_SUSPEND/RESUME */
141 r = dm_task_run (dmt);
144 dm_task_destroy (dmt);
149 dm_addmap (int task, const char *name, const char *target,
150 const char *params, unsigned long long size, const char *uuid) {
153 char *prefixed_uuid = NULL;
155 if (!(dmt = dm_task_create (task)))
158 if (!dm_task_set_name (dmt, name))
161 if (!dm_task_add_target (dmt, 0, size, target, params))
165 prefixed_uuid = MALLOC(UUID_PREFIX_LEN + strlen(uuid) + 1);
166 if (!prefixed_uuid) {
167 condlog(0, "cannot create prefixed uuid : %s\n",
171 sprintf(prefixed_uuid, UUID_PREFIX "%s", uuid);
172 if (!dm_task_set_uuid(dmt, prefixed_uuid))
176 dm_task_no_open_count(dmt);
178 r = dm_task_run (dmt);
185 dm_task_destroy (dmt);
190 dm_map_present (char * str)
196 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
199 if (!dm_task_set_name(dmt, str))
202 dm_task_no_open_count(dmt);
204 if (!dm_task_run(dmt))
207 if (!dm_task_get_info(dmt, &info))
213 dm_task_destroy(dmt);
218 dm_get_map(char * name, unsigned long long * size, char * outparams)
223 uint64_t start, length;
224 char *target_type = NULL;
227 if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
230 if (!dm_task_set_name(dmt, name))
233 dm_task_no_open_count(dmt);
235 if (!dm_task_run(dmt))
238 /* Fetch 1st target */
239 next = dm_get_next_target(dmt, next, &start, &length,
240 &target_type, ¶ms);
245 if (snprintf(outparams, PARAMS_SIZE, "%s", params) <= PARAMS_SIZE)
248 dm_task_destroy(dmt);
253 dm_get_uuid(char *name, char *uuid)
259 dmt = dm_task_create(DM_DEVICE_INFO);
263 if (!dm_task_set_name (dmt, name))
266 if (!dm_task_run(dmt))
269 uuidtmp = dm_task_get_uuid(dmt);
271 if (!strncmp(uuidtmp, UUID_PREFIX, UUID_PREFIX_LEN))
272 strcpy(uuid, uuidtmp + UUID_PREFIX_LEN);
274 strcpy(uuid, uuidtmp);
281 dm_task_destroy(dmt);
286 dm_get_status(char * name, char * outstatus)
291 uint64_t start, length;
295 if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
298 if (!dm_task_set_name(dmt, name))
301 dm_task_no_open_count(dmt);
303 if (!dm_task_run(dmt))
306 /* Fetch 1st target */
307 next = dm_get_next_target(dmt, next, &start, &length,
308 &target_type, &status);
310 if (snprintf(outstatus, PARAMS_SIZE, "%s", status) <= PARAMS_SIZE)
314 condlog(0, "%s: error getting map status string", name);
316 dm_task_destroy(dmt);
327 dm_type(char * name, char * type)
332 uint64_t start, length;
333 char *target_type = NULL;
336 if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
339 if (!dm_task_set_name(dmt, name))
342 dm_task_no_open_count(dmt);
344 if (!dm_task_run(dmt))
347 /* Fetch 1st target */
348 next = dm_get_next_target(dmt, next, &start, &length,
349 &target_type, ¶ms);
353 else if (!strcmp(target_type, type))
357 dm_task_destroy(dmt);
362 dm_dev_t (char * mapname, char * dev_t, int len)
368 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
371 if (!dm_task_set_name(dmt, mapname))
374 if (!dm_task_run(dmt))
377 if (!dm_task_get_info(dmt, &info))
381 if (snprintf(dev_t, len, "%i:%i", info.major, info.minor) > len)
386 dm_task_destroy(dmt);
391 dm_get_opencount (char * mapname)
397 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
400 if (!dm_task_set_name(dmt, mapname))
403 if (!dm_task_run(dmt))
406 if (!dm_task_get_info(dmt, &info))
411 dm_task_destroy(dmt);
416 dm_get_minor (char * mapname)
422 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
425 if (!dm_task_set_name(dmt, mapname))
428 if (!dm_task_run(dmt))
431 if (!dm_task_get_info(dmt, &info))
436 dm_task_destroy(dmt);
441 dm_flush_map (char * mapname, char * type)
445 if (!dm_map_present(mapname))
448 if (dm_type(mapname, type) <= 0)
451 if (dm_remove_partmaps(mapname))
454 if (dm_get_opencount(mapname)) {
455 condlog(2, "%s: map in use", mapname);
459 r = dm_simplecmd(DM_DEVICE_REMOVE, mapname);
462 condlog(4, "multipath map %s removed", mapname);
469 dm_flush_maps (char * type)
473 struct dm_names *names;
476 if (!(dmt = dm_task_create (DM_DEVICE_LIST)))
479 dm_task_no_open_count(dmt);
481 if (!dm_task_run (dmt))
484 if (!(names = dm_task_get_names (dmt)))
491 r += dm_flush_map(names->name, type);
493 names = (void *) names + next;
497 dm_task_destroy (dmt);
502 dm_message(char * mapname, char * message)
507 if (!(dmt = dm_task_create(DM_DEVICE_TARGET_MSG)))
510 if (!dm_task_set_name(dmt, mapname))
513 if (!dm_task_set_sector(dmt, 0))
516 if (!dm_task_set_message(dmt, message))
519 dm_task_no_open_count(dmt);
521 if (!dm_task_run(dmt))
527 condlog(0, "DM message failed [%s]", message);
529 dm_task_destroy(dmt);
534 dm_fail_path(char * mapname, char * path)
538 if (snprintf(message, 32, "fail_path %s\n", path) > 32)
541 return dm_message(mapname, message);
545 dm_reinstate_path(char * mapname, char * path)
549 if (snprintf(message, 32, "reinstate_path %s\n", path) > 32)
552 return dm_message(mapname, message);
556 dm_queue_if_no_path(char *mapname, int enable)
561 message = "queue_if_no_path\n";
563 message = "fail_if_no_path\n";
565 return dm_message(mapname, message);
569 dm_set_pg_timeout(char *mapname, int timeout_val)
573 if (snprintf(message, 24, "set_pg_timeout %d", timeout_val) >= 24)
575 return dm_message(mapname, message);
579 dm_groupmsg (char * msg, char * mapname, int index)
583 if (snprintf(message, 32, "%s_group %i\n", msg, index) > 32)
586 return dm_message(mapname, message);
590 dm_switchgroup(char * mapname, int index)
592 return dm_groupmsg("switch", mapname, index);
596 dm_enablegroup(char * mapname, int index)
598 return dm_groupmsg("enable", mapname, index);
602 dm_disablegroup(char * mapname, int index)
604 return dm_groupmsg("disable", mapname, index);
608 dm_get_maps (vector mp, char * type)
610 struct multipath * mpp;
614 struct dm_names *names;
620 if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
623 dm_task_no_open_count(dmt);
625 if (!dm_task_run(dmt))
628 if (!(names = dm_task_get_names(dmt)))
632 r = 0; /* this is perfectly valid */
637 info = dm_type(names->name, type);
642 mpp = alloc_multipath();
647 mpp->alias = STRDUP(names->name);
653 if (dm_get_map(names->name, &mpp->size, mpp->params))
656 if (dm_get_status(names->name, mpp->status))
659 dm_get_uuid(names->name, mpp->wwid);
660 dm_get_info(names->name, &mpp->dmi);
663 if (!vector_alloc_slot(mp))
666 vector_set_slot(mp, mpp);
670 names = (void *) names + next;
676 free_multipath(mpp, KEEP_PATHS);
678 dm_task_destroy (dmt);
683 dm_get_name(char *uuid, char *type, char *name)
686 struct multipath *mpp;
689 vec = vector_alloc();
694 if (dm_get_maps(vec, type)) {
699 vector_foreach_slot(vec, mpp, i) {
700 if (!strcmp(uuid, mpp->wwid)) {
702 strcpy(name, mpp->alias);
712 dm_geteventnr (char *name)
717 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
720 if (!dm_task_set_name(dmt, name))
723 dm_task_no_open_count(dmt);
725 if (!dm_task_run(dmt))
728 if (!dm_task_get_info(dmt, &info)) {
739 dm_task_destroy(dmt);
741 return info.event_nr;
745 dm_mapname(int major, int minor)
747 char * response = NULL;
751 int loop = MAX_WAIT * LOOPS_PER_SEC;
753 if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
756 if (!dm_task_set_major(dmt, major) ||
757 !dm_task_set_minor(dmt, minor))
760 dm_task_no_open_count(dmt);
763 * device map might not be ready when we get here from
764 * daemon uev_trigger -> uev_add_map
768 r = dm_task_run(dmt);
774 usleep(1000 * 1000 / LOOPS_PER_SEC);
778 condlog(0, "%i:%i: timeout fetching map name", major, minor);
782 map = dm_task_get_name(dmt);
783 if (map && strlen(map))
784 response = STRDUP((char *)dm_task_get_name(dmt));
786 dm_task_destroy(dmt);
789 dm_task_destroy(dmt);
790 condlog(0, "%i:%i: error fetching map name", major, minor);
795 dm_remove_partmaps (char * mapname)
798 struct dm_names *names;
800 char params[PARAMS_SIZE];
801 unsigned long long size;
805 if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
808 dm_task_no_open_count(dmt);
810 if (!dm_task_run(dmt))
813 if (!(names = dm_task_get_names(dmt)))
817 r = 0; /* this is perfectly valid */
821 if (dm_dev_t(mapname, &dev_t[0], 32))
827 * if devmap target is "linear"
829 (dm_type(names->name, "linear") > 0) &&
832 * and the multipath mapname and the part mapname start
835 !strncmp(names->name, mapname, strlen(mapname)) &&
838 * and the opencount is 0 for us to allow removal
840 !dm_get_opencount(names->name) &&
843 * and we can fetch the map table from the kernel
845 !dm_get_map(names->name, &size, ¶ms[0]) &&
848 * and the table maps over the multipath map
850 strstr(params, dev_t)
853 * then it's a kpartx generated partition.
856 condlog(4, "partition map %s removed",
858 dm_simplecmd(DM_DEVICE_REMOVE, names->name);
862 names = (void *) names + next;
867 dm_task_destroy (dmt);
871 static struct dm_info *
874 return MALLOC(sizeof(struct dm_info));
878 dm_get_info (char * mapname, struct dm_info ** dmi)
881 struct dm_task *dmt = NULL;
887 *dmi = alloc_dminfo();
892 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
895 if (!dm_task_set_name(dmt, mapname))
898 dm_task_no_open_count(dmt);
900 if (!dm_task_run(dmt))
903 if (!dm_task_get_info(dmt, *dmi))
909 memset(*dmi, 0, sizeof(struct dm_info));
912 dm_task_destroy(dmt);
918 dm_rename_partmaps (char * old, char * new)
921 struct dm_names *names;
923 char buff[PARAMS_SIZE];
924 unsigned long long size;
928 if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
931 dm_task_no_open_count(dmt);
933 if (!dm_task_run(dmt))
936 if (!(names = dm_task_get_names(dmt)))
940 r = 0; /* this is perfectly valid */
944 if (dm_dev_t(old, &dev_t[0], 32))
950 * if devmap target is "linear"
952 (dm_type(names->name, "linear") > 0) &&
955 * and the multipath mapname and the part mapname start
958 !strncmp(names->name, old, strlen(old)) &&
961 * and we can fetch the map table from the kernel
963 !dm_get_map(names->name, &size, &buff[0]) &&
966 * and the table maps over the multipath map
971 * then it's a kpartx generated partition.
974 snprintf(buff, PARAMS_SIZE, "%s%s",
975 new, names->name + strlen(old));
976 dm_rename(names->name, buff);
977 condlog(4, "partition map %s renamed",
982 names = (void *) names + next;
987 dm_task_destroy (dmt);
992 dm_rename (char * old, char * new)
997 if (dm_rename_partmaps(old, new))
1000 if (!(dmt = dm_task_create(DM_DEVICE_RENAME)))
1003 if (!dm_task_set_name(dmt, old))
1006 if (!dm_task_set_newname(dmt, new))
1009 dm_task_no_open_count(dmt);
1011 if (!dm_task_run(dmt))
1016 dm_task_destroy(dmt);