Date: Thu, 25 Nov 1999 08:03:37 -0700 (MST) From: "Justin T. Gibbs" <gibbs@narnia.plutotech.com> To: Nick Hibma <hibma@skylink.it> Cc: scsi@FreeBSD.org Subject: Re: found device. Message-ID: <199911251503.IAA99696@narnia.plutotech.com> In-Reply-To: <Pine.BSF.4.20.9911250218550.489-100000@henny.jrc.it>
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In article <Pine.BSF.4.20.9911250218550.489-100000@henny.jrc.it> you wrote:
>
> How do I make sure the bus is rescanned when a new target has appeared?
>
> Whenever a new device is attached, I would like the SCSI bus to which it
> is connected to be rescanned. The following code however doesn't do the
> job it seems (FYI: All USB Zip drives are connected to 1 SCSI bus, bus
> 0).
>
> Nick
>
>
> static int
> umass_cam_rescan(umass_softc_t *sc)
> {
> union ccb *ccb;
> struct cam_path *path;
> struct cam_periph *periph;
>
> if (xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
> CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD)
> != CAM_REQ_CMP)
> return(ENOMEM);
>
> periph = cam_periph_find(path, NULL/*name*/);
> if (!periph)
> return(EINVAL);
The only time you will ever find a peripheral on the wildcard node
is if you are using the target mode black hole device. You probably
want to use 0 and 0 for the target and lun respectively. (cam_periph_find
looks for exact matches, and will not exand wildcards).
> if (xpt_create_path(&sc->path, periph, cam_sim_path(umass_sim),
> device_get_unit(sc->sc_dev), CAM_LUN_WILDCARD)
> != CAM_REQ_CMP)
> return(ENOMEM);
>
> ccb = malloc(sizeof(union ccb), M_DEVBUF, M_WAITOK);
> xpt_setup_ccb(&ccb->ccb_h, sc->path, 5/*priority (low)*/);
> ccb->ccb_h.func_code = XPT_SCAN_LUN;
> ccb->ccb_h.cbfcnp = umass_cam_attach_callback;
> ccb->crcn.flags = CAM_FLAG_NONE;
> xpt_action(ccb);
>
> return(0);
> }
If you simply want to rescan the bus, try XPT_SCAN_BUS.
--
Justin
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