smbfs_findnext
error = smbfs_findnext(ctx, offset - np->n_dirofs++, scred);
error = smbfs_findnext(ctx, limit, scred);
error = smbfs_findnext(ctx, 1, scred);
int smbfs_findnext(struct smbfs_fctx *ctx, int limit, struct smb_cred *scred);