C++ xpt_free_path函数代码示例

static void
ptinit(void)
{
	cam_status status;
	struct cam_path *path;

	/*
	 * Install a global async callback.  This callback will
	 * receive async callbacks like "new device found".
	 */
	status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID,
				 CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);

	if (status == CAM_REQ_CMP) {
		struct ccb_setasync csa;

                xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5);
                csa.ccb_h.func_code = XPT_SASYNC_CB;
                csa.event_enable = AC_FOUND_DEVICE;
                csa.callback = ptasync;
                csa.callback_arg = NULL;
                xpt_action((union ccb *)&csa);
		status = csa.ccb_h.status;
                xpt_free_path(path);
        }

	if (status != CAM_REQ_CMP) {
		printf("pt: Failed to attach master async callback "
		       "due to status 0x%x!\n", status);
	}
}

void
mpt_cam_detach(mpt_softc_t *mpt)
{
	if (mpt->sim != NULL) {
		xpt_free_path(mpt->path);
		xpt_bus_deregister(cam_sim_path(mpt->sim));
		cam_sim_free(mpt->sim, TRUE);
		mpt->sim = NULL;
	}
}

/**
 * mrsas_cam_detach:        De-allocates and teardown CAM  
 * input:                   Adapter instance soft state 
 *
 * De-registers and frees the paths and SIMs. 
 */
void mrsas_cam_detach(struct mrsas_softc *sc)
{
	if (sc->ev_tq != NULL)
        taskqueue_free(sc->ev_tq);
    mtx_lock(&sc->sim_lock);
    if (sc->path_0)
        xpt_free_path(sc->path_0);
    if (sc->sim_0) {
        xpt_bus_deregister(cam_sim_path(sc->sim_0));
        cam_sim_free(sc->sim_0, FALSE);
    }
    if (sc->path_1)
        xpt_free_path(sc->path_1);
    if (sc->sim_1) {
        xpt_bus_deregister(cam_sim_path(sc->sim_1));
        cam_sim_free(sc->sim_1, TRUE);
    }
    mtx_unlock(&sc->sim_lock);
}

/**
 * mrsas_cam_detach:        De-allocates and teardown CAM  
 * input:                   Adapter instance soft state 
 *
 * De-registers and frees the paths and SIMs. 
 */
void mrsas_cam_detach(struct mrsas_softc *sc)
{
    if (sc->ev_tq != NULL)
        taskqueue_free(sc->ev_tq);
    lockmgr(&sc->sim_lock, LK_EXCLUSIVE);
    if (sc->path_0)
        xpt_free_path(sc->path_0);
    if (sc->sim_0) {
        xpt_bus_deregister(cam_sim_path(sc->sim_0));
        cam_sim_free(sc->sim_0);
    }
    if (sc->path_1)
        xpt_free_path(sc->path_1);
    if (sc->sim_1) {
        xpt_bus_deregister(cam_sim_path(sc->sim_1));
        cam_sim_free(sc->sim_1);
    }
    lockmgr(&sc->sim_lock, LK_RELEASE);
}

/*
 * Function name:	twa_cam_detach
 * Description:		Detaches the driver from CAM.
 *
 * Input:		sc	-- ptr to per ctlr structure
 * Output:		None
 * Return value:	None
 */
void
twa_cam_detach(struct twa_softc *sc)
{
	if (sc->twa_path)
		xpt_free_path(sc->twa_path);
	if (sc->twa_sim) {
		xpt_bus_deregister(cam_sim_path(sc->twa_sim));
		cam_sim_free(sc->twa_sim, TRUE); /* passing TRUE will free the devq as well */
	}
}

int
aha_detach(struct aha_softc *aha)
{
	mtx_lock(&aha->lock);
	xpt_async(AC_LOST_DEVICE, aha->path, NULL);
	xpt_free_path(aha->path);
	xpt_bus_deregister(cam_sim_path(aha->sim));
	cam_sim_free(aha->sim, /*free_devq*/TRUE);
	mtx_unlock(&aha->lock);
	/* XXX: Drain all timers? */
	return (0);
}

/*
 * Function name:	twa_bus_scan_cb
 * Description:		Callback from CAM on a bus scan request.
 *
 * Input:		periph	-- we don't use this
 *			ccb	-- bus scan request ccb that we sent to CAM
 * Output:		None
 * Return value:	None
 */
static void
twa_bus_scan_cb(struct cam_periph *periph, union ccb *ccb)
{
	twa_dbg_print(3, "ccb = %p\n", ccb);
	if (ccb->ccb_h.status != CAM_REQ_CMP)
		printf("cam_scan_callback: failure status = %x\n",
					ccb->ccb_h.status);
	else
		twa_dbg_print(3, "success");

	xpt_free_path(ccb->ccb_h.path);
	free(ccb, M_TEMP);
}

void
tws_cam_detach(struct tws_softc *sc)
{
    TWS_TRACE_DEBUG(sc, "entry", 0, 0);
    mtx_lock(&sc->sim_lock);
    if (sc->path)
        xpt_free_path(sc->path);
    if (sc->sim) {
        xpt_bus_deregister(cam_sim_path(sc->sim));
        cam_sim_free(sc->sim, TRUE);
    }
    mtx_unlock(&sc->sim_lock);
}

void
tws_cam_detach(struct tws_softc *sc)
{
    TWS_TRACE_DEBUG(sc, "entry", 0, 0);
    lockmgr(&sc->sim_lock, LK_EXCLUSIVE);
    if (sc->path)
        xpt_free_path(sc->path);
    if (sc->sim) {
        xpt_bus_deregister(cam_sim_path(sc->sim));
        cam_sim_free(sc->sim);
    }
    lockmgr(&sc->sim_lock, LK_RELEASE);
}

void
ic_lost_target(isc_session_t *sp, int target)
{
     debug_called(8);
     sdebug(2, "lost target=%d", target);

     if(sp->cam_path != NULL) {
	  mtx_lock(&sp->cam_mtx);
	  xpt_async(AC_LOST_DEVICE, sp->cam_path, NULL);
	  xpt_free_path(sp->cam_path);
	  mtx_unlock(&sp->cam_mtx);
	  sp->cam_path = 0; // XXX
     }
}

/*
 * Function name:	twa_bus_scan_cb
 * Description:		Callback from CAM on a bus scan request.
 *
 * Input:		periph	-- we don't use this
 *			ccb	-- bus scan request ccb that we sent to CAM
 * Output:		None
 * Return value:	None
 */
static TW_VOID
twa_bus_scan_cb(struct cam_periph *periph, union ccb *ccb)
{
	tw_osli_dbg_printf(3, "entering");

	if (ccb->ccb_h.status != CAM_REQ_CMP)
		kprintf("cam_scan_callback: failure status = %x\n",
			ccb->ccb_h.status);
	else
		tw_osli_dbg_printf(3, "success");

	xpt_free_path(ccb->ccb_h.path);
	kfree(ccb, M_TEMP);
}

static void
nvme_sim_controller_fail(void *ctrlr_arg)
{
	struct nvme_sim_softc *sc = ctrlr_arg;
	struct nvme_controller *ctrlr = sc->s_ctrlr;

	mtx_lock(&ctrlr->lock);
	xpt_async(AC_LOST_DEVICE, sc->s_path, NULL);
	xpt_free_path(sc->s_path);
	xpt_bus_deregister(cam_sim_path(sc->s_sim));
	cam_sim_free(sc->s_sim, /*free_devq*/TRUE);
	mtx_unlock(&ctrlr->lock);
	free(sc, M_NVME);
}

void
isci_remote_device_release_lun_queue(struct ISCI_REMOTE_DEVICE *remote_device,
    lun_id_t lun)
{
	if (remote_device->frozen_lun_mask & (1 << lun)) {
		struct cam_path *path;

		remote_device->frozen_lun_mask &= ~(1 << lun);
		xpt_create_path(&path, NULL,
		    cam_sim_path(remote_device->domain->controller->sim),
		    remote_device->index, lun);
		xpt_release_devq(path, 1, TRUE);
		xpt_free_path(path);
	}
}

/********************************************************************************
 * Find a peripheral attahed at (bus),(target)
 */
static struct cam_periph *
mly_find_periph(struct mly_softc *sc, int bus, int target)
{
    struct cam_periph	*periph;
    struct cam_path	*path;
    int			status;

    status = xpt_create_path(&path, NULL, cam_sim_path(sc->mly_cam_sim[bus]), target, 0);
    if (status == CAM_REQ_CMP) {
	periph = cam_periph_find(path, NULL);
	xpt_free_path(path);
    } else {
	periph = NULL;
    }
    return(periph);
}

/*
 * Function name:	tw_osli_cam_detach
 * Description:		Detaches the driver from CAM.
 *
 * Input:		sc	-- ptr to OSL internal ctlr context
 * Output:		None
 * Return value:	None
 */
TW_VOID
tw_osli_cam_detach(struct twa_softc *sc)
{
	tw_osli_dbg_dprintf(3, sc, "entered");

	mtx_lock(sc->sim_lock);
           
	if (sc->path)
		xpt_free_path(sc->path);
	if (sc->sim) {
		xpt_bus_deregister(cam_sim_path(sc->sim));
		/* Passing TRUE to cam_sim_free will free the devq as well. */
		cam_sim_free(sc->sim, TRUE);
	}
	/* It's ok have 1 hold count while destroying the mutex */
	mtx_destroy(sc->sim_lock);
}