[SCSI] libfc: vport link handling and fc_vport state managment

NPIV vports are managed in libfc by changing their virtual link state
when the parent N_Ports internal state changes.  The vport link is only
online when the N_Port is in a ready state (logged into the fabric).

vport_state is updated as needed in this patch as well, currently the states
LINKDOWN, INITIALIZING, ACTIVE, DSIABLED, and NO_FABRIC_SUPP are used.

This also changes the fc_host port_state handling to differentiate between
LINKDOWN and OFFLINE.

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>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 2c6d55d..dfeb1ee 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -788,11 +788,13 @@ int fc_fabric_login(struct fc_lport *lp);
 /*
  * The link is up for the given local port.
  */
+void __fc_linkup(struct fc_lport *);
 void fc_linkup(struct fc_lport *);
 
 /*
  * Link is down for the given local port.
  */
+void __fc_linkdown(struct fc_lport *);
 void fc_linkdown(struct fc_lport *);
 
 /*
@@ -821,6 +823,12 @@ struct fc_lport *libfc_vport_create(struct fc_vport *vport, int privsize);
 struct fc_lport *fc_vport_id_lookup(struct fc_lport *n_port, u32 port_id);
 
 /*
+ * NPIV VN_Port link state management
+ */
+void fc_vport_setlink(struct fc_lport *vn_port);
+void fc_vports_linkchange(struct fc_lport *n_port);
+
+/*
  * REMOTE PORT LAYER
  *****************************/
 int fc_rport_init(struct fc_lport *lp);