[PATCH 05/11] btrfs-progs: tune: check for missing device

[Anand Jain <anand.jain@oracle.com>]

If btrfstune is executed on a filesystem that contains a missing device,
the command will now fail.

It is ok fail when any of the options supported by btrfstune are used.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
 tune/main.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tune/main.c b/tune/main.c
index 570e3908ef8a..dc72944a2b67 100644
--- a/tune/main.c
+++ b/tune/main.c
@@ -330,6 +330,13 @@ int BOX_MAIN(btrfstune)(int argc, char *argv[])
 		goto free_out;
 	}
 
+	if (root->fs_info->fs_devices->missing) {
+		error("missing %d device(s), failing the command",
+		       root->fs_info->fs_devices->missing);
+		ret = 1;
+		goto free_out;
+	}
+
  	if (to_bg_tree) {
 		if (to_extent_tree) {
 			error("option --convert-to-block-group-tree conflicts with --convert-from-block-group-tree");
-- 
2.39.3