btrfs-progs: basic support for TREE_SEARCH_V2 ioctl

Add the interface and helper that checks if the v2 ioctl is supported.

Signed-off-by: David Sterba <dsterba@suse.cz>

1 files changed, 2 insertions, 0 deletions

diff --git a/utils.h b/utils.h
index 6cbb7b8..0464c2d 100644
--- a/utils.h
+++ b/utils.h
@@ -187,4 +187,6 @@ static inline int count_digits(u64 num)
 	return ret;
 }
 
+int btrfs_tree_search2_ioctl_supported(int fd);
+
 #endif