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
11 #include <libdevmapper.h>
13 #include <linux/kdev_t.h>
22 #include "devmapper.h"
25 #include "log_pthread.h"
26 #include <sys/types.h>
30 #define LOOPS_PER_SEC 5
32 #define UUID_PREFIX "mpath-"
33 #define UUID_PREFIX_LEN 6
36 dm_write_log (int level, const char *file, int line, const char *f, ...)
44 thres = (conf) ? conf->verbosity : 0;
45 if (thres <= 3 || level > thres)
50 time_t t = time(NULL);
51 struct tm *tb = localtime(&t);
54 strftime(buff, sizeof(buff), "%b %d %H:%M:%S", tb);
55 buff[sizeof(buff)-1] = '\0';
57 fprintf(stdout, "%s | ", buff);
58 fprintf(stdout, "libdevmapper: %s(%i): ", file, line);
59 vfprintf(stdout, f, ap);
60 fprintf(stdout, "\n");
62 condlog(level, "libdevmapper: %s(%i): ", file, line);
63 log_safe(level + 3, f, ap);
72 dm_log_init(&dm_write_log);
73 dm_log_init_verbose(conf ? conf->verbosity + 3 : 0);
81 int minv[3] = {1, 2, 8};
83 dm_get_library_version(version, sizeof(version));
84 condlog(3, "libdevmapper version %s", version);
85 sscanf(version, "%d.%d.%d ", &v[0], &v[1], &v[2]);
87 if ((v[0] > minv[0]) ||
88 ((v[0] == minv[0]) && (v[1] > minv[1])) ||
89 ((v[0] == minv[0]) && (v[1] == minv[1]) && (v[2] >= minv[2])))
91 condlog(0, "libdevmapper version must be >= %d.%.2d.%.2d",
92 minv[0], minv[1], minv[2]);
97 dm_drvprereq (char * str)
101 struct dm_versions *target;
102 struct dm_versions *last_target;
103 int minv[3] = {1, 0, 3};
106 if (!(dmt = dm_task_create(DM_DEVICE_LIST_VERSIONS)))
109 dm_task_no_open_count(dmt);
111 if (!dm_task_run(dmt)) {
112 condlog(0, "Can not communicate with kernel DM");
115 target = dm_task_get_versions(dmt);
118 last_target = target;
119 if (!strncmp(str, target->name, strlen(str))) {
123 target = (void *) target + target->next;
124 } while (last_target != target);
127 condlog(0, "DM multipath kernel driver not loaded");
131 if ((v[0] > minv[0]) ||
132 ((v[0] == minv[0]) && (v[1] > minv[1])) ||
133 ((v[0] == minv[0]) && (v[1] == minv[1]) && (v[2] >= minv[2]))) {
137 condlog(0, "DM multipath kernel driver must be >= %u.%.2u.%.2u",
138 minv[0], minv[1], minv[2]);
140 dm_task_destroy(dmt);
145 dm_prereq (char * str)
149 return dm_drvprereq(str);
153 dm_simplecmd (int task, const char *name) {
157 if (!(dmt = dm_task_create (task)))
160 if (!dm_task_set_name (dmt, name))
163 dm_task_no_open_count(dmt);
164 dm_task_skip_lockfs(dmt); /* for DM_DEVICE_RESUME */
165 #ifdef LIBDM_API_FLUSH
166 dm_task_no_flush(dmt); /* for DM_DEVICE_SUSPEND/RESUME */
169 r = dm_task_run (dmt);
172 dm_task_destroy (dmt);
177 dm_addmap (int task, const char *name, const char *target,
178 const char *params, unsigned long long size, const char *uuid) {
181 char *prefixed_uuid = NULL;
183 if (!(dmt = dm_task_create (task)))
186 if (!dm_task_set_name (dmt, name))
189 if (!dm_task_add_target (dmt, 0, size, target, params))
193 prefixed_uuid = MALLOC(UUID_PREFIX_LEN + strlen(uuid) + 1);
194 if (!prefixed_uuid) {
195 condlog(0, "cannot create prefixed uuid : %s\n",
199 sprintf(prefixed_uuid, UUID_PREFIX "%s", uuid);
200 if (!dm_task_set_uuid(dmt, prefixed_uuid))
204 dm_task_no_open_count(dmt);
206 r = dm_task_run (dmt);
213 dm_task_destroy (dmt);
218 dm_map_present (char * str)
224 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
227 if (!dm_task_set_name(dmt, str))
230 dm_task_no_open_count(dmt);
232 if (!dm_task_run(dmt))
235 if (!dm_task_get_info(dmt, &info))
241 dm_task_destroy(dmt);
246 dm_get_map(char * name, unsigned long long * size, char * outparams)
251 uint64_t start, length;
252 char *target_type = NULL;
255 if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
258 if (!dm_task_set_name(dmt, name))
261 dm_task_no_open_count(dmt);
263 if (!dm_task_run(dmt))
266 /* Fetch 1st target */
267 next = dm_get_next_target(dmt, next, &start, &length,
268 &target_type, ¶ms);
273 if (snprintf(outparams, PARAMS_SIZE, "%s", params) <= PARAMS_SIZE)
276 dm_task_destroy(dmt);
281 dm_get_uuid(char *name, char *uuid)
287 dmt = dm_task_create(DM_DEVICE_INFO);
291 if (!dm_task_set_name (dmt, name))
294 if (!dm_task_run(dmt))
297 uuidtmp = dm_task_get_uuid(dmt);
299 if (!strncmp(uuidtmp, UUID_PREFIX, UUID_PREFIX_LEN))
300 strcpy(uuid, uuidtmp + UUID_PREFIX_LEN);
302 strcpy(uuid, uuidtmp);
309 dm_task_destroy(dmt);
314 dm_get_status(char * name, char * outstatus)
319 uint64_t start, length;
323 if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
326 if (!dm_task_set_name(dmt, name))
329 dm_task_no_open_count(dmt);
331 if (!dm_task_run(dmt))
334 /* Fetch 1st target */
335 next = dm_get_next_target(dmt, next, &start, &length,
336 &target_type, &status);
338 if (snprintf(outstatus, PARAMS_SIZE, "%s", status) <= PARAMS_SIZE)
342 condlog(0, "%s: error getting map status string", name);
344 dm_task_destroy(dmt);
355 dm_type(char * name, char * type)
360 uint64_t start, length;
361 char *target_type = NULL;
364 if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
367 if (!dm_task_set_name(dmt, name))
370 dm_task_no_open_count(dmt);
372 if (!dm_task_run(dmt))
375 /* Fetch 1st target */
376 next = dm_get_next_target(dmt, next, &start, &length,
377 &target_type, ¶ms);
381 else if (!strcmp(target_type, type))
385 dm_task_destroy(dmt);
390 dm_dev_t (char * mapname, char * dev_t, int len)
396 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
399 if (!dm_task_set_name(dmt, mapname))
402 if (!dm_task_run(dmt))
405 if (!dm_task_get_info(dmt, &info))
409 if (snprintf(dev_t, len, "%i:%i", info.major, info.minor) > len)
414 dm_task_destroy(dmt);
419 dm_get_opencount (char * mapname)
425 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
428 if (!dm_task_set_name(dmt, mapname))
431 if (!dm_task_run(dmt))
434 if (!dm_task_get_info(dmt, &info))
439 dm_task_destroy(dmt);
444 dm_get_minor (char * mapname)
450 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
453 if (!dm_task_set_name(dmt, mapname))
456 if (!dm_task_run(dmt))
459 if (!dm_task_get_info(dmt, &info))
464 dm_task_destroy(dmt);
469 dm_flush_map (char * mapname, char * type)
473 if (!dm_map_present(mapname))
476 if (dm_type(mapname, type) <= 0)
479 if (dm_remove_partmaps(mapname))
482 if (dm_get_opencount(mapname)) {
483 condlog(2, "%s: map in use", mapname);
487 r = dm_simplecmd(DM_DEVICE_REMOVE, mapname);
490 condlog(4, "multipath map %s removed", mapname);
497 dm_flush_maps (char * type)
501 struct dm_names *names;
504 if (!(dmt = dm_task_create (DM_DEVICE_LIST)))
507 dm_task_no_open_count(dmt);
509 if (!dm_task_run (dmt))
512 if (!(names = dm_task_get_names (dmt)))
519 r += dm_flush_map(names->name, type);
521 names = (void *) names + next;
525 dm_task_destroy (dmt);
530 dm_message(char * mapname, char * message)
535 if (!(dmt = dm_task_create(DM_DEVICE_TARGET_MSG)))
538 if (!dm_task_set_name(dmt, mapname))
541 if (!dm_task_set_sector(dmt, 0))
544 if (!dm_task_set_message(dmt, message))
547 dm_task_no_open_count(dmt);
549 if (!dm_task_run(dmt))
555 condlog(0, "DM message failed [%s]", message);
557 dm_task_destroy(dmt);
562 dm_fail_path(char * mapname, char * path)
566 if (snprintf(message, 32, "fail_path %s\n", path) > 32)
569 return dm_message(mapname, message);
573 dm_reinstate_path(char * mapname, char * path)
577 if (snprintf(message, 32, "reinstate_path %s\n", path) > 32)
580 return dm_message(mapname, message);
584 dm_queue_if_no_path(char *mapname, int enable)
589 message = "queue_if_no_path\n";
591 message = "fail_if_no_path\n";
593 return dm_message(mapname, message);
597 dm_set_pg_timeout(char *mapname, int timeout_val)
601 if (snprintf(message, 24, "set_pg_timeout %d", timeout_val) >= 24)
603 return dm_message(mapname, message);
607 dm_groupmsg (char * msg, char * mapname, int index)
611 if (snprintf(message, 32, "%s_group %i\n", msg, index) > 32)
614 return dm_message(mapname, message);
618 dm_switchgroup(char * mapname, int index)
620 return dm_groupmsg("switch", mapname, index);
624 dm_enablegroup(char * mapname, int index)
626 return dm_groupmsg("enable", mapname, index);
630 dm_disablegroup(char * mapname, int index)
632 return dm_groupmsg("disable", mapname, index);
636 dm_get_maps (vector mp, char * type)
638 struct multipath * mpp;
642 struct dm_names *names;
648 if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
651 dm_task_no_open_count(dmt);
653 if (!dm_task_run(dmt))
656 if (!(names = dm_task_get_names(dmt)))
660 r = 0; /* this is perfectly valid */
665 info = dm_type(names->name, type);
670 mpp = alloc_multipath();
675 mpp->alias = STRDUP(names->name);
681 if (dm_get_map(names->name, &mpp->size, mpp->params))
684 if (dm_get_status(names->name, mpp->status))
687 dm_get_uuid(names->name, mpp->wwid);
688 dm_get_info(names->name, &mpp->dmi);
691 if (!vector_alloc_slot(mp))
694 vector_set_slot(mp, mpp);
698 names = (void *) names + next;
704 free_multipath(mpp, KEEP_PATHS);
706 dm_task_destroy (dmt);
711 dm_get_name(char *uuid, char *type, char *name)
714 struct multipath *mpp;
717 vec = vector_alloc();
722 if (dm_get_maps(vec, type)) {
727 vector_foreach_slot(vec, mpp, i) {
728 if (!strcmp(uuid, mpp->wwid)) {
730 strcpy(name, mpp->alias);
740 dm_geteventnr (char *name)
745 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
748 if (!dm_task_set_name(dmt, name))
751 dm_task_no_open_count(dmt);
753 if (!dm_task_run(dmt))
756 if (!dm_task_get_info(dmt, &info)) {
767 dm_task_destroy(dmt);
769 return info.event_nr;
773 dm_mapname(int major, int minor)
775 char * response = NULL;
779 int loop = MAX_WAIT * LOOPS_PER_SEC;
781 if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
784 if (!dm_task_set_major(dmt, major) ||
785 !dm_task_set_minor(dmt, minor))
788 dm_task_no_open_count(dmt);
791 * device map might not be ready when we get here from
792 * daemon uev_trigger -> uev_add_map
795 r = dm_task_run(dmt);
800 usleep(1000 * 1000 / LOOPS_PER_SEC);
804 condlog(0, "%i:%i: timeout fetching map name", major, minor);
808 map = dm_task_get_name(dmt);
809 if (map && strlen(map))
810 response = STRDUP((char *)dm_task_get_name(dmt));
812 dm_task_destroy(dmt);
815 dm_task_destroy(dmt);
816 condlog(0, "%i:%i: error fetching map name", major, minor);
821 dm_remove_partmaps (char * mapname)
824 struct dm_names *names;
826 char params[PARAMS_SIZE];
827 unsigned long long size;
831 if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
834 dm_task_no_open_count(dmt);
836 if (!dm_task_run(dmt))
839 if (!(names = dm_task_get_names(dmt)))
843 r = 0; /* this is perfectly valid */
847 if (dm_dev_t(mapname, &dev_t[0], 32))
853 * if devmap target is "linear"
855 (dm_type(names->name, "linear") > 0) &&
858 * and the multipath mapname and the part mapname start
861 !strncmp(names->name, mapname, strlen(mapname)) &&
864 * and the opencount is 0 for us to allow removal
866 !dm_get_opencount(names->name) &&
869 * and we can fetch the map table from the kernel
871 !dm_get_map(names->name, &size, ¶ms[0]) &&
874 * and the table maps over the multipath map
876 strstr(params, dev_t)
879 * then it's a kpartx generated partition.
882 condlog(4, "partition map %s removed",
884 dm_simplecmd(DM_DEVICE_REMOVE, names->name);
888 names = (void *) names + next;
893 dm_task_destroy (dmt);
897 static struct dm_info *
900 return MALLOC(sizeof(struct dm_info));
904 dm_get_info (char * mapname, struct dm_info ** dmi)
907 struct dm_task *dmt = NULL;
913 *dmi = alloc_dminfo();
918 if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
921 if (!dm_task_set_name(dmt, mapname))
924 dm_task_no_open_count(dmt);
926 if (!dm_task_run(dmt))
929 if (!dm_task_get_info(dmt, *dmi))
935 memset(*dmi, 0, sizeof(struct dm_info));
938 dm_task_destroy(dmt);
944 dm_rename_partmaps (char * old, char * new)
947 struct dm_names *names;
949 char buff[PARAMS_SIZE];
950 unsigned long long size;
954 if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
957 dm_task_no_open_count(dmt);
959 if (!dm_task_run(dmt))
962 if (!(names = dm_task_get_names(dmt)))
966 r = 0; /* this is perfectly valid */
970 if (dm_dev_t(old, &dev_t[0], 32))
976 * if devmap target is "linear"
978 (dm_type(names->name, "linear") > 0) &&
981 * and the multipath mapname and the part mapname start
984 !strncmp(names->name, old, strlen(old)) &&
987 * and we can fetch the map table from the kernel
989 !dm_get_map(names->name, &size, &buff[0]) &&
992 * and the table maps over the multipath map
997 * then it's a kpartx generated partition.
1000 snprintf(buff, PARAMS_SIZE, "%s%s",
1001 new, names->name + strlen(old));
1002 dm_rename(names->name, buff);
1003 condlog(4, "partition map %s renamed",
1008 names = (void *) names + next;
1013 dm_task_destroy (dmt);
1018 dm_rename (char * old, char * new)
1021 struct dm_task *dmt;
1023 if (dm_rename_partmaps(old, new))
1026 if (!(dmt = dm_task_create(DM_DEVICE_RENAME)))
1029 if (!dm_task_set_name(dmt, old))
1032 if (!dm_task_set_newname(dmt, new))
1035 dm_task_no_open_count(dmt);
1037 if (!dm_task_run(dmt))
1042 dm_task_destroy(dmt);