[SCSI] fcoe, libfc: add get_lesb() to allow LLD to fill the link error status block (LESB)

Add a member function pointer as get_lesb to libfc_function_template so LLD
can fill the LESB based on its own statistics. For fcoe, it fills the LESB
as a fcoe_fc_els_lesb struct according to FC-BB-5.

Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index b97be2903cbc..4b912eee33e5 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -511,6 +511,12 @@ struct libfc_function_template {
          */
         int (*ddp_done)(struct fc_lport *, u16);
         /*
+         * Allow LLD to fill its own Link Error Status Block
+         *
+         * STATUS: OPTIONAL
+         */
+        void (*get_lesb)(struct fc_lport *, struct fc_els_lesb *lesb);
+        /*
          * Send a frame using an existing sequence and exchange.
          *
          * STATUS: OPTIONAL