[SCSI] libfc: add some generic NPIV support routines to libfc
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>
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index ed3057b..2c6d55d 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -640,6 +640,8 @@
/* Associations */
struct Scsi_Host *host;
struct list_head ema_list;
+ struct list_head vports; /* child vports if N_Port */
+ struct fc_vport *vport; /* parent vport if VN_Port */
struct fc_rport_priv *dns_rp;
struct fc_rport_priv *ptp_rp;
void *scsi_priv;
@@ -664,6 +666,8 @@
u32 seq_offload:1; /* seq offload supported */
u32 crc_offload:1; /* crc offload supported */
u32 lro_enabled:1; /* large receive offload */
+ u32 does_npiv:1; /* supports multiple vports */
+ u32 npiv_enabled:1; /* switch/fabric allows NPIV */
u32 mfs; /* max FC payload size */
unsigned int service_params;
unsigned int e_d_tov;
@@ -753,6 +757,7 @@
lport = shost_priv(shost);
lport->host = shost;
INIT_LIST_HEAD(&lport->ema_list);
+ INIT_LIST_HEAD(&lport->vports);
return lport;
}
@@ -805,6 +810,15 @@
*/
int fc_set_mfs(struct fc_lport *lp, u32 mfs);
+/*
+ * Allocate a new lport struct for an NPIV VN_Port
+ */
+struct fc_lport *libfc_vport_create(struct fc_vport *vport, int privsize);
+
+/*
+ * Find an NPIV VN_Port by port ID
+ */
+struct fc_lport *fc_vport_id_lookup(struct fc_lport *n_port, u32 port_id);
/*
* REMOTE PORT LAYER
@@ -912,6 +926,12 @@
void fc_exch_mgr_del(struct fc_exch_mgr_anchor *ema);
/*
+ * Clone an exchange manager list, getting reference holds for each EM.
+ * This is for use with NPIV and sharing the X_ID space between VN_Ports.
+ */
+int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst);
+
+/*
* Allocates an Exchange Manager (EM).
*
* The EM manages exchanges for their allocation and