btrfs-progs: close all fs_devices before exit in some commands

mkfs creates more than one fs_devices in fs_uuids.
1: one is for file system being created
2: others are created in test_dev_for_mkfs in order to check mount point
   test_dev_for_mkfs()-> ... -> btrfs_scan_one_device()

Current code only closes 1, and this patch also closes in case 2.

Similar problem exist in other tools, eg.::

 cmd-check.c: the function is:
 cmd_check()->check_mounted()-> ... -> btrfs_scan_one_device()
 ...

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>

cmds-check.c

@@ -9588,6 +9588,7 @@ out:
 	free_root_recs_tree(&root_cache);
 close_out:
 	close_ctree(root);
+	btrfs_close_all_devices();
 err_out:
 	return ret;
 }

cmds-device.c

@@ -28,6 +28,7 @@
 #include "ctree.h"
 #include "ioctl.h"
 #include "utils.h"
+#include "volumes.h"
 #include "cmds-fi-usage.h"
 
 #include "commands.h"
@@ -140,6 +141,7 @@ static int cmd_device_add(int argc, char **argv)
 
 error_out:
 	close_file_or_dir(fdmnt, dirstream);
+	btrfs_close_all_devices();
 	return !!ret;
 }
 
@@ -290,6 +292,7 @@ static int cmd_device_scan(int argc, char **argv)
 	}
 
 out:
+	btrfs_close_all_devices();
 	return !!ret;
 }
 
@@ -467,6 +470,7 @@ static int cmd_device_stats(int argc, char **argv)
 out:
 	free(di_args);
 	close_file_or_dir(fdmnt, dirstream);
+	btrfs_close_all_devices();
 
 	return err;
 }

cmds-replace.c

@@ -330,6 +330,7 @@ static int cmd_replace_start(int argc, char **argv)
 		}
 	}
 	close_file_or_dir(fdmnt, dirstream);
+	btrfs_close_all_devices();
 	return 0;
 
 leave_with_error:
@@ -339,6 +340,7 @@ leave_with_error:
 		close(fdmnt);
 	if (fddstdev != -1)
 		close(fddstdev);
+	btrfs_close_all_devices();
 	return 1;
 }
 

mkfs.c

@@ -1843,6 +1843,7 @@ raid_groups:
 out:
 	ret = close_ctree(root);
 	BUG_ON(ret);
+	btrfs_close_all_devices();
 	free(label);
 	return 0;
 }