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Some ethernet adapter vendors are supplying products which support optional (payed license) features. On some adapters this includes a hardware iscsi initiator. The same adapters in a normal (no extra licenses) mode of operation can be used as a software iscsi initiator. In addition, software iscsi boot initiators are becoming a standard part of many vendors uefi implementations. This is creating difficulties during early boot/install determining the proper configuration method for these adapters when they are used as a boot device. The attached patch creates sysfs entries to expose information from the acpi header of the ibft table. This information allows for a method to easily determining if an ibft table was created by a ethernet card's firmware or the system uefi/bios. In the case of a hardware initiator this information in combination with the pci vendor and device id can be used to ascertain any vendor specific behaviors that need to be accommodated. Reviewed-by: Lee Duncan <lduncan@suse.com> Signed-off-by: David Bond <dbond@suse.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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What: /sys/firmware/ibft/initiator Date: November 2007 Contact: Konrad Rzeszutek ketuzsezr@darnok.org Description: The /sys/firmware/ibft/initiator directory will contain files that expose the iSCSI Boot Firmware Table initiator data. Usually this contains the Initiator name.
What: /sys/firmware/ibft/targetX Date: November 2007 Contact: Konrad Rzeszutek ketuzsezr@darnok.org Description: The /sys/firmware/ibft/targetX directory will contain files that expose the iSCSI Boot Firmware Table target data. Usually this contains the target's IP address, boot LUN, target name, and what NIC it is associated with. It can also contain the CHAP name (and password), the reverse CHAP name (and password)
What: /sys/firmware/ibft/ethernetX Date: November 2007 Contact: Konrad Rzeszutek ketuzsezr@darnok.org Description: The /sys/firmware/ibft/ethernetX directory will contain files that expose the iSCSI Boot Firmware Table NIC data. Usually this contains the IP address, MAC, and gateway of the NIC.
What: /sys/firmware/ibft/acpi_header Date: March 2016 Contact: David Bond dbond@suse.com Description: The /sys/firmware/ibft/acpi_header directory will contain files that expose the SIGNATURE, OEM_ID, and OEM_TABLE_ID fields of the acpi table header of the iBFT structure. This will allow for identification of the creator of the table which is useful in determining quirks associated with some adapters when used in hardware vs software iscsi initiator mode.