+ for (mp = *map ; mp ; mp = mp->next) {
+ if (strcmp(mp->devnm, devnm) != 0)
+ continue;
+ if (!mddev_busy(mp->devnm)) {
+ mp->bad = 1;
+ continue;
+ }
+ return mp;
+ }
+ return NULL;
+}
+
+struct map_ent *map_by_name(struct map_ent **map, char *name)
+{
+ struct map_ent *mp;
+ if (!*map)
+ map_read(map);
+
+ for (mp = *map ; mp ; mp = mp->next) {
+ if (!mp->path)
+ continue;
+ if (strncmp(mp->path, "/dev/md/", 8) != 0)
+ continue;
+ if (strcmp(mp->path+8, name) != 0)
+ continue;
+ if (!mddev_busy(mp->devnm)) {
+ mp->bad = 1;
+ continue;
+ }
+ return mp;
+ }
+ return NULL;
+}
+
+/* sets the proper subarray and container_dev according to the metadata
+ * version super_by_fd does this automatically, this routine is meant as
+ * a supplement for guess_super()
+ */
+static char *get_member_info(struct mdstat_ent *ent)
+{
+
+ if (ent->metadata_version == NULL ||
+ strncmp(ent->metadata_version, "external:", 9) != 0)
+ return NULL;
+
+ if (is_subarray(&ent->metadata_version[9])) {
+ char *subarray;
+
+ subarray = strrchr(ent->metadata_version, '/');
+ return subarray + 1;
+ }
+ return NULL;
+}
+
+void RebuildMap(void)
+{
+ struct mdstat_ent *mdstat = mdstat_read(0, 0);
+ struct mdstat_ent *md;
+ struct map_ent *map = NULL;
+ int require_homehost;
+ char sys_hostname[256];
+ char *homehost = conf_get_homehost(&require_homehost);
+
+ if (homehost == NULL || strcmp(homehost, "<system>")==0) {
+ if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) {
+ sys_hostname[sizeof(sys_hostname)-1] = 0;
+ homehost = sys_hostname;
+ }
+ }
+
+ for (md = mdstat ; md ; md = md->next) {
+ struct mdinfo *sra = sysfs_read(-1, md->devnm, GET_DEVS);
+ struct mdinfo *sd;
+
+ if (!sra)
+ continue;
+
+ for (sd = sra->devs ; sd ; sd = sd->next) {
+ char namebuf[100];
+ char dn[30];
+ int dfd;
+ int ok;
+ dev_t devid;
+ struct supertype *st;
+ char *subarray = NULL;
+ char *path;
+ struct mdinfo *info;
+
+ sprintf(dn, "%d:%d", sd->disk.major, sd->disk.minor);
+ dfd = dev_open(dn, O_RDONLY);
+ if (dfd < 0)
+ continue;
+ st = guess_super(dfd);
+ if ( st == NULL)
+ ok = -1;
+ else {
+ subarray = get_member_info(md);
+ ok = st->ss->load_super(st, dfd, NULL);
+ }
+ close(dfd);
+ if (ok != 0)
+ continue;
+ if (subarray)
+ info = st->ss->container_content(st, subarray);
+ else {
+ info = xmalloc(sizeof(*info));
+ st->ss->getinfo_super(st, info, NULL);
+ }
+ if (!info)
+ continue;
+
+ devid = devnm2devid(md->devnm);
+ path = map_dev(major(devid), minor(devid), 0);
+ if (path == NULL ||
+ strncmp(path, "/dev/md/", 8) != 0) {
+ /* We would really like a name that provides
+ * an MD_DEVNAME for udev.
+ * The name needs to be unique both in /dev/md/
+ * and in this mapfile.
+ * It needs to match what -I or -As would come
+ * up with.
+ * That means:
+ * Check if array is in mdadm.conf
+ * - if so use that.
+ * determine trustworthy from homehost etc
+ * find a unique name based on metadata name.
+ *
+ */
+ struct mddev_ident *match = conf_match(st, info,
+ NULL, 0,
+ NULL);
+ struct stat stb;
+ if (match && match->devname && match->devname[0] == '/') {
+ path = match->devname;
+ if (path[0] != '/') {
+ strcpy(namebuf, "/dev/md/");
+ strcat(namebuf, path);
+ path = namebuf;
+ }
+ } else {
+ int unum = 0;
+ char *sep = "_";
+ const char *name;
+ int conflict = 1;
+ if ((homehost == NULL ||
+ st->ss->match_home(st, homehost) != 1) &&
+ st->ss->match_home(st, "any") != 1 &&
+ (require_homehost
+ || ! conf_name_is_free(info->name)))
+ /* require a numeric suffix */
+ unum = 0;
+ else
+ /* allow name to be used as-is if no conflict */
+ unum = -1;
+ name = info->name;
+ if (!*name) {
+ name = st->ss->name;
+ if (!isdigit(name[strlen(name)-1]) &&
+ unum == -1) {
+ unum = 0;
+ sep = "";
+ }
+ }
+ if (strchr(name, ':')) {
+ /* Probably a uniquifying
+ * hostname prefix. Allow
+ * without a suffix, and strip
+ * hostname if it is us.
+ */
+ if (homehost && unum == -1 &&
+ strncmp(name, homehost,
+ strlen(homehost)) == 0 &&
+ name[strlen(homehost)] == ':')
+ name += strlen(homehost)+1;
+ unum = -1;
+ }
+
+ while (conflict) {
+ if (unum >= 0)
+ sprintf(namebuf, "/dev/md/%s%s%d",
+ name, sep, unum);
+ else
+ sprintf(namebuf, "/dev/md/%s",
+ name);
+ unum++;
+ if (lstat(namebuf, &stb) != 0 &&
+ (map == NULL ||
+ !map_by_name(&map, namebuf+8)))
+ conflict = 0;
+ }
+ path = namebuf;
+ }
+ }
+ map_add(&map, md->devnm,
+ info->text_version,
+ info->uuid, path);
+ st->ss->free_super(st);
+ free(info);
+ break;
+ }
+ sysfs_free(sra);
+ }
+ /* Only trigger a change if we wrote a new map file */
+ if (map_write(map))
+ for (md = mdstat ; md ; md = md->next) {
+ struct mdinfo *sra = sysfs_read(-1, md->devnm,
+ GET_VERSION);
+ if (sra)
+ sysfs_uevent(sra, "change");
+ sysfs_free(sra);
+ }
+ map_free(map);
+ free_mdstat(mdstat);