174e1ebffd
Adds a function to create a new VN_Port instances, which share the EM list with the N_Port, VN_Port lookup by fabric ID when responding to a new request (otherwise the exchange lookup from the N_Ports EM list is trusted to return an exchange with a cached lport value for the correct VN_Port), a pointer to a fc_vport structure for VN_Ports, and flags to indicate if an N_Port supports NPIV and if the switch/fabric allows it. Signed-off-by: Chris Leech <christopher.leech@intel.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/*
|
|
* Copyright(c) 2009 Intel Corporation. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with
|
|
* this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Maintained at www.Open-FCoE.org
|
|
*/
|
|
|
|
/*
|
|
* NPIV VN_Port helper functions for libfc
|
|
*/
|
|
|
|
#include <scsi/libfc.h>
|
|
|
|
/**
|
|
* fc_vport_create() - Create a new NPIV vport instance
|
|
* @vport: fc_vport structure from scsi_transport_fc
|
|
* @privsize: driver private data size to allocate along with the Scsi_Host
|
|
*/
|
|
|
|
struct fc_lport *libfc_vport_create(struct fc_vport *vport, int privsize)
|
|
{
|
|
struct Scsi_Host *shost = vport_to_shost(vport);
|
|
struct fc_lport *n_port = shost_priv(shost);
|
|
struct fc_lport *vn_port;
|
|
|
|
vn_port = libfc_host_alloc(shost->hostt, privsize);
|
|
if (!vn_port)
|
|
goto err_out;
|
|
if (fc_exch_mgr_list_clone(n_port, vn_port))
|
|
goto err_put;
|
|
|
|
vn_port->vport = vport;
|
|
vport->dd_data = vn_port;
|
|
|
|
mutex_lock(&n_port->lp_mutex);
|
|
list_add_tail(&vn_port->list, &n_port->vports);
|
|
mutex_unlock(&n_port->lp_mutex);
|
|
|
|
return vn_port;
|
|
|
|
err_put:
|
|
scsi_host_put(vn_port->host);
|
|
err_out:
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(libfc_vport_create);
|
|
|
|
/**
|
|
* fc_vport_id_lookup() - find NPIV lport that matches a given fabric ID
|
|
* @n_port: Top level N_Port which may have multiple NPIV VN_Ports
|
|
* @port_id: Fabric ID to find a match for
|
|
*
|
|
* Returns: matching lport pointer or NULL if there is no match
|
|
*/
|
|
struct fc_lport *fc_vport_id_lookup(struct fc_lport *n_port, u32 port_id)
|
|
{
|
|
struct fc_lport *lport = NULL;
|
|
struct fc_lport *vn_port;
|
|
|
|
if (fc_host_port_id(n_port->host) == port_id)
|
|
return n_port;
|
|
|
|
mutex_lock(&n_port->lp_mutex);
|
|
list_for_each_entry(vn_port, &n_port->vports, list) {
|
|
if (fc_host_port_id(vn_port->host) == port_id) {
|
|
lport = vn_port;
|
|
break;
|
|
}
|
|
}
|
|
mutex_unlock(&n_port->lp_mutex);
|
|
|
|
return lport;
|
|
}
|
|
|