[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>
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 32298ed..a30ffaa 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -111,6 +111,8 @@
void *, u32 timeout);
static void fcoe_recv_frame(struct sk_buff *skb);
+static void fcoe_get_lesb(struct fc_lport *, struct fc_els_lesb *);
+
module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR);
__MODULE_PARM_TYPE(create, "string");
MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in.");
@@ -141,6 +143,7 @@
.ddp_setup = fcoe_ddp_setup,
.ddp_done = fcoe_ddp_done,
.elsct_send = fcoe_elsct_send,
+ .get_lesb = fcoe_get_lesb,
};
struct fc_function_template fcoe_transport_function = {
@@ -2455,3 +2458,34 @@
lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
NULL, NULL, 3 * lport->r_a_tov);
}
+
+/**
+ * fcoe_get_lesb() - Fill the FCoE Link Error Status Block
+ * @lport: the local port
+ * @fc_lesb: the link error status block
+ */
+static void fcoe_get_lesb(struct fc_lport *lport,
+ struct fc_els_lesb *fc_lesb)
+{
+ unsigned int cpu;
+ u32 lfc, vlfc, mdac;
+ struct fcoe_dev_stats *devst;
+ struct fcoe_fc_els_lesb *lesb;
+ struct net_device *netdev = fcoe_netdev(lport);
+
+ lfc = 0;
+ vlfc = 0;
+ mdac = 0;
+ lesb = (struct fcoe_fc_els_lesb *)fc_lesb;
+ memset(lesb, 0, sizeof(*lesb));
+ for_each_possible_cpu(cpu) {
+ devst = per_cpu_ptr(lport->dev_stats, cpu);
+ lfc += devst->LinkFailureCount;
+ vlfc += devst->VLinkFailureCount;
+ mdac += devst->MissDiscAdvCount;
+ }
+ lesb->lesb_link_fail = htonl(lfc);
+ lesb->lesb_vlink_fail = htonl(vlfc);
+ lesb->lesb_miss_fka = htonl(mdac);
+ lesb->lesb_fcs_error = htonl(dev_get_stats(netdev)->rx_crc_errors);
+}
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index b97be29..4b912ee 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -511,6 +511,12 @@
*/
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