bcachefs: Inode updates should generally be BTREE_INSERT_NOFAIL

This fixes a bug where i_size may become inconsistent between the VFS
cache and the btree, when the filesystem is nearly full.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>

fs/bcachefs/reflink.c

@@ -347,7 +347,8 @@ s64 bch2_remap_range(struct bch_fs *c,
 		    inode_u.bi_size < new_i_size) {
 			inode_u.bi_size = new_i_size;
 			ret2  = bch2_inode_write(&trans, &inode_iter, &inode_u) ?:
-				bch2_trans_commit(&trans, NULL, NULL, 0);
+				bch2_trans_commit(&trans, NULL, NULL,
+						  BTREE_INSERT_NOFAIL);
 		}
 
 		bch2_trans_iter_exit(&trans, &inode_iter);