Dell Emulex Family of Adapters - Manual (Page 859)

Emulex Drivers Version 10.2 for Linux User Manual P010081-01A Rev. A
3. Configuration
Virtual Port (VPort) Configuration
859
/sys/class/fc_host/hostY/
Creating a new VPort also creates a new sysfs directory in the bus and devices tree:
ls /sys/bus/pci/drivers/lpfc/0000:07:00.0/host8/
fc_host:host8 host10 power scsi_host:host8 uevent
ls /sys/bus/pci/drivers/lpfc/0000:07:00.0/host8/host10
fc_host:host10 power scsi_host:host10 uevent
In this example, host 8 is the physical port, and host 10 is a VPort that was created on
host 8.
For FC RHEL6.x/SLES11-SPx Drivers
When a VPort is created, three new directories are created in the class tree:
/sys/class/scsi_host/hostY/
/sys/class/fc_host/hostY/
/sys/class/fc_vports/vport-X:0-Z/-
Creating a new VPort also creates a new sysfs directory in the bus and devices tree:
/sys/bus/pci/drivers/lpfc/0000:A:B:C/hostX/vport-X:0-Z/hostY
/sys/devices/pci0000:A/0000:A:B:C/hostX/vport-X:0-Z/hostY
In both directories there is a hostY directory that contains the remote ports that this
new host can access:
/sys/bus/pci/drivers/lpfc/0000:A:B:C/hostX/vport-X:0-Z/hostY
/sys/bus/pci/drivers/lpfc/0000:A:B:C/hostX/vport-X:0-Z/hostY/rport-Y:0-0
/sys/bus/pci/drivers/lpfc/0000:A:B:C/hostX/vport-X:0-Z/hostY/rport-Y:0-1
/sys/bus/pci/drivers/lpfc/0000:A:B:C/hostX/vport-X:0-Z/hostY/rport-Y:0-2
In this example:

“Y” indicates the new host value for the VPort that was created.

“X” indicates the host value for the parent fc_host that this VPort was created
from.

“Z” indicates the instance of VPort created from the parent fc_host. A, B, and C
indicate the PCI hierarchy for each physical LPFC port.
In other words, “hostY” is the new host created for the new VPort. “vport-X:0-Z”
uniquely identifies the VPort and indicates the parent host structure (X) that this VPort
was created by.
For example, if a VPort is created from host5, a new scsi_host, a new fc_host, a new
fc_vport, and a new entry under the bus tree are created as well.
ls /sys/class/scsi_host/
host0 host1 host4 host5 host6
ls /sys/class/fc_host/
host4 host5 host6
ls /sys/class/fc_vports/
vport-5:0-0