| Chris Leech | 174e1eb | 2009-11-03 11:46:14 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright(c) 2009 Intel Corporation. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms and conditions of the GNU General Public License, |
| 6 | * version 2, as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
| 16 | * |
| 17 | * Maintained at www.Open-FCoE.org |
| 18 | */ |
| 19 | |
| 20 | /* |
| 21 | * NPIV VN_Port helper functions for libfc |
| 22 | */ |
| 23 | |
| 24 | #include <scsi/libfc.h> |
| 25 | |
| 26 | /** |
| 27 | * fc_vport_create() - Create a new NPIV vport instance |
| 28 | * @vport: fc_vport structure from scsi_transport_fc |
| 29 | * @privsize: driver private data size to allocate along with the Scsi_Host |
| 30 | */ |
| 31 | |
| 32 | struct fc_lport *libfc_vport_create(struct fc_vport *vport, int privsize) |
| 33 | { |
| 34 | struct Scsi_Host *shost = vport_to_shost(vport); |
| 35 | struct fc_lport *n_port = shost_priv(shost); |
| 36 | struct fc_lport *vn_port; |
| 37 | |
| 38 | vn_port = libfc_host_alloc(shost->hostt, privsize); |
| 39 | if (!vn_port) |
| 40 | goto err_out; |
| 41 | if (fc_exch_mgr_list_clone(n_port, vn_port)) |
| 42 | goto err_put; |
| 43 | |
| 44 | vn_port->vport = vport; |
| 45 | vport->dd_data = vn_port; |
| 46 | |
| 47 | mutex_lock(&n_port->lp_mutex); |
| 48 | list_add_tail(&vn_port->list, &n_port->vports); |
| 49 | mutex_unlock(&n_port->lp_mutex); |
| 50 | |
| 51 | return vn_port; |
| 52 | |
| 53 | err_put: |
| 54 | scsi_host_put(vn_port->host); |
| 55 | err_out: |
| 56 | return NULL; |
| 57 | } |
| 58 | EXPORT_SYMBOL(libfc_vport_create); |
| 59 | |
| 60 | /** |
| 61 | * fc_vport_id_lookup() - find NPIV lport that matches a given fabric ID |
| 62 | * @n_port: Top level N_Port which may have multiple NPIV VN_Ports |
| 63 | * @port_id: Fabric ID to find a match for |
| 64 | * |
| 65 | * Returns: matching lport pointer or NULL if there is no match |
| 66 | */ |
| 67 | struct fc_lport *fc_vport_id_lookup(struct fc_lport *n_port, u32 port_id) |
| 68 | { |
| 69 | struct fc_lport *lport = NULL; |
| 70 | struct fc_lport *vn_port; |
| 71 | |
| 72 | if (fc_host_port_id(n_port->host) == port_id) |
| 73 | return n_port; |
| 74 | |
| 75 | mutex_lock(&n_port->lp_mutex); |
| 76 | list_for_each_entry(vn_port, &n_port->vports, list) { |
| 77 | if (fc_host_port_id(vn_port->host) == port_id) { |
| 78 | lport = vn_port; |
| 79 | break; |
| 80 | } |
| 81 | } |
| 82 | mutex_unlock(&n_port->lp_mutex); |
| 83 | |
| 84 | return lport; |
| 85 | } |
| 86 | |