smb_threshold_enter
if ((rc = smb_threshold_enter(&sv->sv_ssetup_ct)) != 0)
if ((rc = smb_threshold_enter(&sv->sv_opipe_ct)) != 0) {
if (smb_threshold_enter(&sv->sv_tcon_ct) != 0) {
if (smb_threshold_enter(&sv->sv_logoff_ct) != 0) {
int smb_threshold_enter(smb_cmd_threshold_t *);