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authorJoe Eykholt <jeykholt@cisco.com>2010-07-20 15:20:03 -0700
committerJames Bottomley <James.Bottomley@suse.de>2010-07-28 09:05:53 -0500
commit3726f3584e113697b68d3d4ff1ecf1042a06f800 (patch)
tree2e452d689739c4c2516f50d018f8587bf7d58e41
parent3d902ac09a2812b359edf633425d1327a18399e9 (diff)
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[SCSI] libfc: Add local port point-to-multipoint flag
For VN_port to VN_port mode, the transport sets the port_id and there's no lport FLOGI. This is similar to FC loop mode. Add a point_to_multipoint flag that indicates the local port is in point-to-multipoint mode. This skips FLOGI and discovery. It also skips resetting the port_id on resets other than link down. Add function fc_lport_set_local_id() that sets the local port_id. This is called by libfcoe on behalf of the low-level driver to set the port_id when the link comes up. Signed-off-by: Joe Eykholt <jeykholt@cisco.com> Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
-rw-r--r--drivers/scsi/libfc/fc_lport.c36
-rw-r--r--include/scsi/libfc.h2
2 files changed, 37 insertions, 1 deletions
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 79c9e3ccd34..f7bff2cad4e 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -755,6 +755,34 @@ static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id,
}
/**
+ * fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint
+ * @lport: The local port which will have its Port ID set.
+ * @port_id: The new port ID.
+ *
+ * Called by the lower-level driver when transport sets the local port_id.
+ * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and
+ * discovery to be skipped.
+ */
+void fc_lport_set_local_id(struct fc_lport *lport, u32 port_id)
+{
+ mutex_lock(&lport->lp_mutex);
+
+ fc_lport_set_port_id(lport, port_id, NULL);
+
+ switch (lport->state) {
+ case LPORT_ST_RESET:
+ case LPORT_ST_FLOGI:
+ if (port_id)
+ fc_lport_enter_ready(lport);
+ break;
+ default:
+ break;
+ }
+ mutex_unlock(&lport->lp_mutex);
+}
+EXPORT_SYMBOL(fc_lport_set_local_id);
+
+/**
* fc_lport_recv_flogi_req() - Receive a FLOGI request
* @sp_in: The sequence the FLOGI is on
* @rx_fp: The FLOGI frame
@@ -954,7 +982,7 @@ static void fc_lport_reset_locked(struct fc_lport *lport)
lport->tt.exch_mgr_reset(lport, 0, 0);
fc_host_fabric_name(lport->host) = 0;
- if (lport->port_id)
+ if (lport->port_id && (!lport->point_to_multipoint || !lport->link_up))
fc_lport_set_port_id(lport, 0, NULL);
}
@@ -1536,6 +1564,12 @@ void fc_lport_enter_flogi(struct fc_lport *lport)
fc_lport_state_enter(lport, LPORT_ST_FLOGI);
+ if (lport->point_to_multipoint) {
+ if (lport->port_id)
+ fc_lport_enter_ready(lport);
+ return;
+ }
+
fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
if (!fp)
return fc_lport_error(lport, fp);
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 5f64e593cca..bd0560509ce 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -846,6 +846,7 @@ struct fc_lport {
u32 lro_enabled:1;
u32 does_npiv:1;
u32 npiv_enabled:1;
+ u32 point_to_multipoint:1;
u32 mfs;
u8 max_retry_count;
u8 max_rport_retry_count;
@@ -991,6 +992,7 @@ int fc_set_mfs(struct fc_lport *, u32 mfs);
struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize);
struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id);
int fc_lport_bsg_request(struct fc_bsg_job *);
+void fc_lport_set_local_id(struct fc_lport *, u32 port_id);
/*
* REMOTE PORT LAYER