[SCSI] bfa: Implement LUN Masking feature using the SCSI Slave Callouts.

This patch re-implements LUN Masking feature using SCSI Slave Callouts.  With
the new design in the slave_alloc entry point; for each new LUN discovered we
check with our internal LUN Masking config whether to expose or to mask this
particular LUN. We return -ENXIO (No such device or address) from slave_alloc
for the LUNs we don't want to be exposed.  We also notify the SCSI mid-layer
to do a sequential LUN scan rather than REPORT_LUNS based scan if LUN masking
is enabled on our HBA port, since a -ENXIO from any LUN in REPORT_LUNS based
scan translates to a scan abort.  This patch also handles the dynamic lun
masking config change from enable to disable or vice-versa by resetting
sdev_bflags of LUN 0 appropriately.

Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c
index 66fb72531b3..404fd10ddb2 100644
--- a/drivers/scsi/bfa/bfad.c
+++ b/drivers/scsi/bfa/bfad.c
@@ -674,6 +674,7 @@ bfad_vport_create(struct bfad_s *bfad, u16 vf_id,
 
         spin_lock_irqsave(&bfad->bfad_lock, flags);
         bfa_fcs_vport_start(&vport->fcs_vport);
+        list_add_tail(&vport->list_entry, &bfad->vport_list);
         spin_unlock_irqrestore(&bfad->bfad_lock, flags);
 
         return BFA_STATUS_OK;
@@ -1404,6 +1405,7 @@ bfad_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)
         bfad->ref_count = 0;
         bfad->pport.bfad = bfad;
         INIT_LIST_HEAD(&bfad->pbc_vport_list);
+        INIT_LIST_HEAD(&bfad->vport_list);
 
         /* Setup the debugfs node for this bfad */
         if (bfa_debugfs_enable)