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[SCSI] lpfc 8.3.25: Add FCF priority failover functionality

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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>
This commit is contained in:
James Smart
2011-07-22 18:37:52 -04:00
committed by James Bottomley
parent b76f2dc91c
commit 7d791df730
8 changed files with 377 additions and 20 deletions
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7
drivers/scsi/lpfc/lpfc_init.c
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@@ -3634,8 +3634,7 @@ lpfc_sli4_async_fip_evt(struct lpfc_hba *phba,
lpfc_sli4_fcf_dead_failthrough(phba);
} else {
/* Reset FCF roundrobin bmask for new discovery */
memset(phba->fcf.fcf_rr_bmask, 0,
sizeof(*phba->fcf.fcf_rr_bmask));
lpfc_sli4_clear_fcf_rr_bmask(phba);
/*
* Handling fast FCF failover to a DEAD FCF event is
* considered equalivant to receiving CVL to all vports.
@@ -3721,8 +3720,7 @@ lpfc_sli4_async_fip_evt(struct lpfc_hba *phba,
* Reset FCF roundrobin bmask for new
* discovery.
*/
memset(phba->fcf.fcf_rr_bmask, 0,
sizeof(*phba->fcf.fcf_rr_bmask));
lpfc_sli4_clear_fcf_rr_bmask(phba);
}
break;
default:
@@ -9046,6 +9044,7 @@ lpfc_pci_probe_one_s4(struct pci_dev *pdev, const struct pci_device_id *pid)
}
INIT_LIST_HEAD(&phba->active_rrq_list);
INIT_LIST_HEAD(&phba->fcf.fcf_pri_list);
/* Set up common device driver resources */
error = lpfc_setup_driver_resource_phase2(phba);