How to identify the HBA cards/ports and WWN in Linux

How to identify the HBA cards/ports and WWN in Linux:
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There are several commands to determine the WWN of a Fibre Channel (FC) HBA and their status (online/offline). The post discusses few of the most commonly used methods.

Method 1
To find the HBA cards installed on your system use :

# lspci -nn | grep -i hba
07:00.0 Fibre Channel [0c04]: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA [1077:2532] (rev 02)
07:00.1 Fibre Channel [0c04]: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA [1077:2532] (rev 02)

To check the available HBA ports :

# ls -l /sys/class/fc_host
total 0
drwxr-xr-x 3 root root 0 Feb  3  2015 host2
drwxr-xr-x 3 root root 0 Feb  3  2015 host3

To find the state of HBA ports (online/offline) :

# more /sys/class/fc_host/host?/port_state
::::::::::::::
/sys/class/fc_host/host2/port_state
::::::::::::::
Online
::::::::::::::
/sys/class/fc_host/host3/port_state
::::::::::::::
Online

To find the WWN numbers of the above ports :

# more /sys/class/fc_host/host?/port_name
::::::::::::::
/sys/class/fc_host/host2/port_name
::::::::::::::
0x500143802426baf4
::::::::::::::
/sys/class/fc_host/host3/port_name
::::::::::::::
0x500143802426baf6

Method 2 : Using systool
Another useful command to find the information about HBAs is systool. If not already install, you may need to install the sysfsutils package.

# yum install sysfsutils

To check the available HBA ports :

# systool -c fc_host
Class = "fc_host"

  Class Device = "host2"
    Device = "host2"

  Class Device = "host3"
    Device = "host3"

To find the WWNs for the HBA ports :

# systool -c fc_host -v | grep port_name
    port_name           = "0x500143802426baf4"
    port_name           = "0x500143802426baf6"

To check the HBA ports in details:

Check if the host has HBA card installed and which type of card installed, 

# lspci | grep -i fibre
15:00.0 Fibre Channel: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA (rev 02)
15:00.1 Fibre Channel: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA (rev 02)

physical slot, driver, module information

# lspci -v -s 15:00.0
15:00.0 Fibre Channel: QLogic Corp. ISP2532-based 8Gb Fibre Channel to PCI Express HBA (rev 02)
    Subsystem: QLogic Corp. Device 015d
    Physical Slot: 2
    Flags: bus master, fast devsel, latency 0, IRQ 24
    I/O ports at 2200 [size=256]
    Memory at 97b00000 (64-bit, non-prefetchable) [size=16K]
    Expansion ROM at 90000000 [disabled] [size=256K]
    Capabilities: [44] Power Management version 3
    Capabilities: [4c] Express Endpoint, MSI 00
    Capabilities: [88] MSI: Enable- Count=1/32 Maskable- 64bit+
    Capabilities: [98] Vital Product Data
    Capabilities: [a0] MSI-X: Enable+ Count=2 Masked-
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [138] Power Budgeting <?>
    Kernel driver in use: qla2xxx
    Kernel modules: qla2xxx

Here is another example Emulex Card

# lspci -v -s 10:00.0
10:00.0 Fibre Channel: Emulex Corporation Zephyr-X LightPulse Fibre Channel Host Adapter (rev 02)
    Subsystem: Emulex Corporation Zephyr-X LightPulse Fibre Channel Host Adapter
    Physical Slot: 2
    Flags: bus master, fast devsel, latency 0, IRQ 26
    Memory at c7eff000 (64-bit, non-prefetchable) [size=4K]
    Memory at c7efec00 (64-bit, non-prefetchable) [size=256]
    I/O ports at 6000 [size=256]
    [virtual] Expansion ROM at c0000000 [disabled] [size=256K]
    Capabilities: [58] Power Management version 2
    Capabilities: [60] MSI: Enable+ Count=1/16 Maskable- 64bit+
    Capabilities: [44] Express Endpoint, MSI 00
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [12c] Power Budgeting <?>
    Kernel driver in use: lpfc
    Kernel modules: lpfc

Check if the driver/module loaded in kernel.

# lsmod | grep qla2xxx
qla2xxx               425817  288
scsi_transport_fc      55299  1 qla2xxx

To check the state of the HBA ports (online/offline) :

# systool -c fc_host -v | grep port_state
    port_state          = "Online"
    port_state          = "Online"