bcachefs: data move path should not be trying to move reflink_p keys

This was spotted when the move_extent() path tried to allocate a bio for
a reflink_p extent, but adding pages to the bio failed because we
overflowed bi_max_vecs. Oops.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

fs/bcachefs/extents.h

@@ -455,12 +455,11 @@ unsigned bch2_extent_is_compressed(struct bkey_s_c);
 bool bch2_bkey_matches_ptr(struct bch_fs *, struct bkey_s_c,
 			   struct bch_extent_ptr, u64);
 
-static inline bool bkey_extent_is_data(const struct bkey *k)
+static inline bool bkey_extent_is_direct_data(const struct bkey *k)
 {
 	switch (k->type) {
 	case KEY_TYPE_btree_ptr:
 	case KEY_TYPE_extent:
-	case KEY_TYPE_reflink_p:
 	case KEY_TYPE_reflink_v:
 		return true;
 	default:
@@ -468,6 +467,12 @@ static inline bool bkey_extent_is_data(const struct bkey *k)
 	}
 }
 
+static inline bool bkey_extent_is_data(const struct bkey *k)
+{
+	return bkey_extent_is_direct_data(k) ||
+		k->type == KEY_TYPE_reflink_p;
+}
+
 /*
  * Should extent be counted under inode->i_sectors?
  */

fs/bcachefs/move.c

@@ -547,7 +547,7 @@ static int __bch2_move_data(struct bch_fs *c,
 		if (bkey_cmp(bkey_start_pos(k.k), end) >= 0)
 			break;
 
-		if (!bkey_extent_is_data(k.k))
+		if (!bkey_extent_is_direct_data(k.k))
 			goto next_nondata;
 
 		if (cur_inum != k.k->p.inode) {