[SCSI] lpfc 8.3.25: Add FCF priority failover functionality
This patch implements a new FCF failover policy for the lpfc driver. It
allows the driver to choose which FCF to failover to based on the FCF
priority. This patch also introduces a new sysfs parameter
(fcf_failover_policy) to allow the user to choose which FCF failover policy
to use.
Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/lpfc/lpfc_sli4.h b/drivers/scsi/lpfc/lpfc_sli4.h
index 88387c1..19bb87a 100644
--- a/drivers/scsi/lpfc/lpfc_sli4.h
+++ b/drivers/scsi/lpfc/lpfc_sli4.h
@@ -159,6 +159,25 @@
#define RECORD_VALID 0x02
};
+struct lpfc_fcf_pri_rec {
+ uint16_t fcf_index;
+#define LPFC_FCF_ON_PRI_LIST 0x0001
+#define LPFC_FCF_FLOGI_FAILED 0x0002
+ uint16_t flag;
+ uint32_t priority;
+};
+
+struct lpfc_fcf_pri {
+ struct list_head list;
+ struct lpfc_fcf_pri_rec fcf_rec;
+};
+
+/*
+ * Maximum FCF table index, it is for driver internal book keeping, it
+ * just needs to be no less than the supported HBA's FCF table size.
+ */
+#define LPFC_SLI4_FCF_TBL_INDX_MAX 32
+
struct lpfc_fcf {
uint16_t fcfi;
uint32_t fcf_flag;
@@ -178,15 +197,13 @@
uint32_t eligible_fcf_cnt;
struct lpfc_fcf_rec current_rec;
struct lpfc_fcf_rec failover_rec;
+ struct list_head fcf_pri_list;
+ struct lpfc_fcf_pri fcf_pri[LPFC_SLI4_FCF_TBL_INDX_MAX];
+ uint32_t current_fcf_scan_pri;
struct timer_list redisc_wait;
unsigned long *fcf_rr_bmask; /* Eligible FCF indexes for RR failover */
};
-/*
- * Maximum FCF table index, it is for driver internal book keeping, it
- * just needs to be no less than the supported HBA's FCF table size.
- */
-#define LPFC_SLI4_FCF_TBL_INDX_MAX 32
#define LPFC_REGION23_SIGNATURE "RG23"
#define LPFC_REGION23_VERSION 1