Always update mdadm/map when starting an array.

We previously only updated /var/run/mdadm/map when starting an
array with --incremental.  However we now make more use of
that file (to pass the dev name to udev) so always update it.

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

Assemble.c

@@ -144,6 +144,7 @@ int Assemble(struct supertype *st, char *mddev,
 	int nextspare = 0;
 	char *name;
 	int trustworthy;
+	char chosen_name[1024];
 
 	memset(&info, 0, sizeof(info));
 
@@ -429,7 +430,8 @@ int Assemble(struct supertype *st, char *mddev,
 			trustworthy = FOREIGN;
 		break;
 	}
-	mdfd = create_mddev(mddev, name, ident->autof, trustworthy, NULL);
+	mdfd = create_mddev(mddev, name, ident->autof, trustworthy,
+			    chosen_name);
 	if (mdfd < 0) {
 		st->ss->free_super(st);
 		free(devices);
@@ -437,6 +439,7 @@ int Assemble(struct supertype *st, char *mddev,
 			goto try_again;
 		return 1;
 	}
+	mddev = chosen_name;
 	vers = md_get_version(mdfd);
 	if (vers < 9000) {
 		fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n"
@@ -899,6 +902,12 @@ int Assemble(struct supertype *st, char *mddev,
 	if (!old_linux) {
 		int rv;
 
+		/* First, fill in the map, so that udev can find our name
+		 * as soon as we become active.
+		 */
+		map_update(NULL, fd2devnum(mdfd), info.text_version,
+			   info.uuid, chosen_name);
+
 		rv = set_array_info(mdfd, st, &info);
 		if (rv) {
 			fprintf(stderr, Name ": failed to set array info for %s: %s\n",

Build.c

@@ -60,6 +60,8 @@ int Build(char *mddev, int chunk, int level, int layout,
 	unsigned long long size = ~0ULL;
 	unsigned long long bitmapsize;
 	int mdfd;
+	char chosen_name[1024];
+	int uuid[4] = {0,0,0,0};
 
 	/* scan all devices, make sure they really are block devices */
 	for (dv = devlist; dv; dv=dv->next) {
@@ -114,10 +116,13 @@ int Build(char *mddev, int chunk, int level, int layout,
 		}
 
 	/* We need to create the device.  It can have no name. */
-	mdfd = create_mddev(mddev, NULL, autof, LOCAL, NULL);
+	mdfd = create_mddev(mddev, NULL, autof, LOCAL,
+			    chosen_name);
 	if (mdfd < 0)
 		return 1;
 
+	map_update(NULL, fd2devnum(mdfd), "none", uuid, chosen_name);
+
 	vers = md_get_version(mdfd);
 
 	/* looks Ok, go for it */

Create.c

@@ -79,6 +79,7 @@ int Create(struct supertype *st, char *mddev,
 	struct mdinfo info, *infos;
 	int did_default = 0;
 	unsigned long safe_mode_delay = 0;
+	char chosen_name[1024];
 
 	int major_num = BITMAP_MAJOR_HI;
 
@@ -421,7 +422,7 @@ int Create(struct supertype *st, char *mddev,
 	}
 
 	/* We need to create the device */
-	mdfd = create_mddev(mddev, name, autof, LOCAL, NULL);
+	mdfd = create_mddev(mddev, name, autof, LOCAL, chosen_name);
 	if (mdfd < 0)
 		return 1;
 
@@ -439,6 +440,7 @@ int Create(struct supertype *st, char *mddev,
 			goto abort;
 		}
 	}
+
 	/* Ok, lets try some ioctls */
 
 	info.array.level = level;
@@ -559,6 +561,9 @@ int Create(struct supertype *st, char *mddev,
 				" %s metadata\n", info.text_version);
 	}
 
+	map_update(NULL, fd2devnum(mdfd), info.text_version,
+		   info.uuid, chosen_name);
+
 	if (bitmap_file && vers < 9003) {
 		major_num = BITMAP_MAJOR_HOSTENDIAN;
 #ifdef __BIG_ENDIAN

mapfile.c

@@ -161,7 +161,8 @@ int map_update(struct map_ent **mpp, int devnum, char *metadata,
 		}
 	if (!mp)
 		map_add(&map, devnum, metadata, uuid, path);
-	*mpp = NULL;
+	if (mpp)
+		*mpp = NULL;
 	rv = map_write(map);
 	map_free(map);
 	return rv;

mdassemble.c

@@ -75,6 +75,11 @@ int create_mddev(char *dev, char *name, int autof/*unused*/, int trustworthy,
 	return open_mddev(dev, 0);
 }
 #endif
+int map_update(struct map_ent **mpp, int devnum, char *metadata,
+	       int *uuid, char *path)
+{
+	return 0;
+}
 
 int rv;
 int mdfd = -1;