• Konrad Rzeszutek's avatar
    Firmware: add iSCSI iBFT Support · 138fe4e0
    Konrad Rzeszutek authored
    Add /sysfs/firmware/ibft/[initiator|targetX|ethernetX] directories along with
    text properties which export the the iSCSI Boot Firmware Table (iBFT)
    structure.
    
    What is iSCSI Boot Firmware Table?  It is a mechanism for the iSCSI tools to
    extract from the machine NICs the iSCSI connection information so that they
    can automagically mount the iSCSI share/target.  Currently the iSCSI
    information is hard-coded in the initrd.  The /sysfs entries are read-only
    one-name-and-value fields.
    
    The usual set of data exposed is:
    
    # for a in `find /sys/firmware/ibft/ -type f -print`; do  echo -n "$a: ";  cat $a; done
    /sys/firmware/ibft/target0/target-name: iqn.2007.com.intel-sbx44:storage-10gb
    /sys/firmware/ibft/target0/nic-assoc: 0
    /sys/firmware/ibft/target0/chap-type: 0
    /sys/firmware/ibft/target0/lun: 00000000
    /sys/firmware/ibft/target0/port: 3260
    /sys/firmware/ibft/target0/ip-addr: 192.168.79.116
    /sys/firmware/ibft/target0/flags: 3
    /sys/firmware/ibft/target0/index: 0
    /sys/firmware/ibft/ethernet0/mac: 00:11:25:9d:8b:01
    /sys/firmware/ibft/ethernet0/vlan: 0
    /sys/firmware/ibft/ethernet0/gateway: 192.168.79.254
    /sys/firmware/ibft/ethernet0/origin: 0
    /sys/firmware/ibft/ethernet0/subnet-mask: 255.255.252.0
    /sys/firmware/ibft/ethernet0/ip-addr: 192.168.77.41
    /sys/firmware/ibft/ethernet0/flags: 7
    /sys/firmware/ibft/ethernet0/index: 0
    /sys/firmware/ibft/initiator/initiator-name: iqn.2007-07.com:konrad.initiator
    /sys/firmware/ibft/initiator/flags: 3
    /sys/firmware/ibft/initiator/index: 0
    
    For full details of the IBFT structure please take a look at:
    ftp://ftp.software.ibm.com/systems/support/system_x_pdf/ibm_iscsi_boot_firmware_table_v1.02.pdf
    
    [akpm@linux-foundation.org: fix build]
    Signed-off-by: default avatarKonrad Rzeszutek <konradr@linux.vnet.ibm.com>
    Cc: Mike Christie <michaelc@cs.wisc.edu>
    Cc: Peter Jones <pjones@redhat.com>
    Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
    
    138fe4e0
iscsi_ibft.h 1.38 KB