Choose better devnumbers and tidy up some issues with finding names.

Signed-off-by: Neil Brown <neilb@suse.de>

5 files changed, 18 insertions, 3 deletions

diff --git a/Monitor.c b/Monitor.c
index c94bfd8..7314cdc 100644
--- a/Monitor.c
+++ b/Monitor.c
@@ -385,6 +385,7 @@ int Monitor(mddev_dev_t devlist,
 						if (fd >=0) close(fd);
 						free(st->devname);
 						free(st);
+						put_md_name(st->devname);
 						continue;
 					}
 					close(fd);
diff --git a/Query.c b/Query.c
index 4cae450..46707ed 100644
--- a/Query.c
+++ b/Query.c
@@ -130,6 +130,8 @@ int Query(char *dev)
 		       activity,
 		       map_num(pers, info.array.level),
 		       mddev);
+		if (st->ss->major == 0)
+			put_md_name(mddev);
 	}
 	return 0;
 }
diff --git a/mdopen.c b/mdopen.c
index b6dbbe9..5cca179 100644
--- a/mdopen.c
+++ b/mdopen.c
@@ -183,7 +183,10 @@ int open_mddev(char *dev, int autof)
 		if (num < 0) {
 			/* need to pick an unused number */
 			mdlist = mdstat_read(0, 0);
-			for (num = 0 ; ; num++) {
+			/* Choose a large number.  Start from 127 and search down,
+			 * but if nothing is found, start really big
+			 */
+			for (num = 127 ; num != 128 ; num = num ? num-1 : (1<<22)-1) {
 				struct mdstat_ent *me;
 				int devnum = num;
 				if (major != MD_MAJOR)
@@ -193,7 +196,7 @@ int open_mddev(char *dev, int autof)
 					if (me->devnum == devnum)
 						break;
 				if (!me) {
-					/* doesn't exist if mdstat.
+					/* doesn't exist in mdstat.
 					 * make sure it is new to /dev too
 					 */
 					char *dn;
diff --git a/super0.c b/super0.c
index 7025445..87ef1e0 100644
--- a/super0.c
+++ b/super0.c
@@ -227,9 +227,10 @@ static void brief_examine_super0(void *sbv)
 {
 	mdp_super_t *sb = sbv;
 	char *c=map_num(pers, sb->level);
+	char *nm;
 
 	printf("ARRAY %s level=%s num-devices=%d UUID=",
-	       get_md_name(sb->md_minor),
+	       nm = get_md_name(sb->md_minor),
 	       c?c:"-unknown-", sb->raid_disks);
 	if (sb->minor_version >= 90)
 		printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1,
@@ -237,6 +238,7 @@ static void brief_examine_super0(void *sbv)
 	else
 		printf("%08x", sb->set_uuid0);
 	printf("\n");
+	put_md_name(nm);
 }
 
 static void detail_super0(void *sbv, char *homehost)
diff --git a/util.c b/util.c
index 3d4f6d5..d36feb5 100644
--- a/util.c
+++ b/util.c
@@ -414,6 +414,8 @@ char *map_dev(int major, int minor, int create)
 {
 	struct devmap *p;
 	char *std = NULL, *nonstd=NULL;
+	int did_check = 0;
+ retry:
 	if (!devlist_ready) {
 		char *dev = "/dev";
 		struct stat stb;
@@ -422,6 +424,7 @@ char *map_dev(int major, int minor, int create)
 			dev = "/dev/.";
 		nftw(dev, add_dev, 10, FTW_PHYS);
 		devlist_ready=1;
+		did_check = 1;
 	}
 
 	for (p=devlist; p; p=p->next)
@@ -437,6 +440,10 @@ char *map_dev(int major, int minor, int create)
 					nonstd = p->name;
 			}
 		}
+	if (!std && !nonstd && !did_check) {
+		devlist_ready = 0;
+		goto retry;
+	}
 	if (create && !std && !nonstd) {
 		static char buf[30];
 		snprintf(buf, 1024, "%d:%d", major, minor);