Handle mount with FS with 1 device

If the user passes a single device node during the mount and
we have no information for it in the udev db, we read up the
super block.  When we do this, if the FS only has 1 block device
we will simply go ahead and do the mount instead of walking
all the block devices and reading up super blocks looking for
devices with a matching FS UUID.

Signed-off-by: Tony Asleson <tasleson@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/bch_bindgen/src/bcachefs.rs b/bch_bindgen/src/bcachefs.rs
index 837b0272..7b8a03df 100644
--- a/bch_bindgen/src/bcachefs.rs
+++ b/bch_bindgen/src/bcachefs.rs
@@ -59,6 +59,10 @@ impl bch_sb {
         uuid::Uuid::from_bytes(self.user_uuid.b)
     }
 
+    pub fn number_of_devices(&self) -> u8 {
+        self.nr_devices
+    }
+
     /// Get the nonce used to encrypt the superblock
     pub fn nonce(&self) -> nonce {
         use byteorder::{LittleEndian, ReadBytesExt};