bcachefs: move snapshot_t to subvolume_types.h

this doesn't need to be in bcachefs.h
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/bcachefs.h

@@ -629,18 +629,6 @@ struct btree_path_buf {
 
 #define REPLICAS_DELTA_LIST_MAX	(1U << 16)
 
-struct snapshot_t {
-	u32			parent;
-	u32			children[2];
-	u32			subvol; /* Nonzero only if a subvolume points to this node: */
-	u32			equiv;
-};
-
-typedef struct {
-	u32		subvol;
-	u64		inum;
-} subvol_inum;
-
 #define BCACHEFS_ROOT_SUBVOL_INUM					\
 	((subvol_inum) { BCACHEFS_ROOT_SUBVOL,	BCACHEFS_ROOT_INO })
 

fs/bcachefs/subvolume_types.h

@@ -6,4 +6,16 @@
 
 typedef DARRAY(u32) snapshot_id_list;
 
+struct snapshot_t {
+	u32			parent;
+	u32			children[2];
+	u32			subvol; /* Nonzero only if a subvolume points to this node: */
+	u32			equiv;
+};
+
+typedef struct {
+	u32		subvol;
+	u64		inum;
+} subvol_inum;
+
 #endif /* _BCACHEFS_SUBVOLUME_TYPES_H */