linux-kernel - Re: [PATCH 1/1] scsi: storvsc: Support manual scan of FC hosts on Hyper-V

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Date:	Wed, 16 Mar 2016 16:40:53 -0700
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	KY Srinivasan <kys@...rosoft.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"ohering@...e.com" <ohering@...e.com>,
	"jbottomley@...allels.com" <jbottomley@...allels.com>,
	"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
	"apw@...onical.com" <apw@...onical.com>,
	"vkuznets@...hat.com" <vkuznets@...hat.com>,
	"jasowang@...hat.com" <jasowang@...hat.com>,
	"hare@...e.de" <hare@...e.de>
Subject: Re: [PATCH 1/1] scsi: storvsc: Support manual scan of FC hosts on
 Hyper-V

On Wed, 2016-03-16 at 23:15 +0000, KY Srinivasan wrote:
> 
> > -----Original Message-----
> > From: James Bottomley [mailto:James.Bottomley@...senPartnership.com
> > ]
> > Sent: Wednesday, March 16, 2016 4:08 PM
> > To: Martin K. Petersen <martin.petersen@...cle.com>; KY Srinivasan
> > <kys@...rosoft.com>
> > Cc: Christoph Hellwig <hch@...radead.org>; 
> > gregkh@...uxfoundation.org;
> > linux-kernel@...r.kernel.org; devel@...uxdriverproject.org;
> > ohering@...e.com; jbottomley@...allels.com; 
> > linux-scsi@...r.kernel.org;
> > apw@...onical.com; vkuznets@...hat.com; jasowang@...hat.com;
> > hare@...e.de
> > Subject: Re: [PATCH 1/1] scsi: storvsc: Support manual scan of FC
> > hosts on
> > Hyper-V
> > 
> > On Wed, 2016-03-16 at 18:34 -0400, Martin K. Petersen wrote:
> > > > > > > > "KY" == KY Srinivasan <kys@...rosoft.com> writes:
> > > 
> > > KY> How would I get the sysfs files under fc_host if I don't use
> > > the
> > > FC
> > > KY> transport.  The customer scripts expect these sysfs files.
> > > 
> > > Right, but I was interested in finding out why they need those
> > > files. And whether an alternative to the FC transport would be a
> > > better solution.
> > 
> > If it's just the wwn file (or a set of other values), we might be
> > able
> > to separate that bit out of the FC transport class so you can use
> > it
> > independently ... do you have a full list of the files being used?
> 
> Wwn files are what we can support on Hyper-V and that is what I want 
> to support (to address customer requirements).

There is no wwn file.  These are all the possible attributes they could
use; which one(s) do you want:

	/*
	 * Setup SCSI Host Attributes.
	 */
	SETUP_HOST_ATTRIBUTE_RD(node_name);
	SETUP_HOST_ATTRIBUTE_RD(port_name);
	SETUP_HOST_ATTRIBUTE_RD(permanent_port_name);
	SETUP_HOST_ATTRIBUTE_RD(supported_classes);
	SETUP_HOST_ATTRIBUTE_RD(supported_fc4s);
	SETUP_HOST_ATTRIBUTE_RD(supported_speeds);
	SETUP_HOST_ATTRIBUTE_RD(maxframe_size);
	if (ft->vport_create) {
		SETUP_HOST_ATTRIBUTE_RD_NS(max_npiv_vports);
		SETUP_HOST_ATTRIBUTE_RD_NS(npiv_vports_inuse);
	}
	SETUP_HOST_ATTRIBUTE_RD(serial_number);
	SETUP_HOST_ATTRIBUTE_RD(manufacturer);
	SETUP_HOST_ATTRIBUTE_RD(model);
	SETUP_HOST_ATTRIBUTE_RD(model_description);
	SETUP_HOST_ATTRIBUTE_RD(hardware_version);
	SETUP_HOST_ATTRIBUTE_RD(driver_version);
	SETUP_HOST_ATTRIBUTE_RD(firmware_version);
	SETUP_HOST_ATTRIBUTE_RD(optionrom_version);

	SETUP_HOST_ATTRIBUTE_RD(port_id);
	SETUP_HOST_ATTRIBUTE_RD(port_type);
	SETUP_HOST_ATTRIBUTE_RD(port_state);
	SETUP_HOST_ATTRIBUTE_RD(active_fc4s);
	SETUP_HOST_ATTRIBUTE_RD(speed);
	SETUP_HOST_ATTRIBUTE_RD(fabric_name);
	SETUP_HOST_ATTRIBUTE_RD(symbolic_name);
	SETUP_HOST_ATTRIBUTE_RW(system_hostname);

	/* Transport-managed attributes */
	SETUP_PRIVATE_HOST_ATTRIBUTE_RW(dev_loss_tmo);
	SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type);
	if (ft->issue_fc_host_lip)
		SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip);
	if (ft->vport_create)
		SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_create);
	if (ft->vport_delete)
		SETUP_PRIVATE_HOST_ATTRIBUTE_RW(vport_delete);
	/*
	 * Setup Remote Port Attributes.
	 */
	count=0;
	SETUP_RPORT_ATTRIBUTE_RD(maxframe_size);
	SETUP_RPORT_ATTRIBUTE_RD(supported_classes);
	SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo);
	SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name);
	SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name);
	SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id);
	SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles);
	SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state);
	SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id);
	SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo);

	/*
	 * Setup Virtual Port Attributes.
	 */
	SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_state);
	SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_last_state);
	SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(node_name);
	SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(port_name);
	SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(roles);
	SETUP_PRIVATE_VPORT_ATTRIBUTE_RD(vport_type);
	SETUP_VPORT_ATTRIBUTE_RW(symbolic_name);
	SETUP_VPORT_ATTRIBUTE_WR(vport_delete);
	SETUP_VPORT_ATTRIBUTE_WR(vport_disable);

I'm assuming it's host and rport port_id?

James