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ibft: Expose iBFT acpi header via sysfs

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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>
This commit is contained in:
David Bond
2016-03-23 21:49:26 -04:00
committed by Konrad Rzeszutek Wilk
parent 9a99425f07
commit b3c8eb5038
4 changed files with 150 additions and 1 deletions
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13
include/linux/iscsi_boot_sysfs.h
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@@ -64,6 +64,12 @@ enum iscsi_boot_initiator_properties_enum {
ISCSI_BOOT_INI_END_MARKER,
};
enum iscsi_boot_acpitbl_properties_enum {
ISCSI_BOOT_ACPITBL_SIGNATURE,
ISCSI_BOOT_ACPITBL_OEM_ID,
ISCSI_BOOT_ACPITBL_OEM_TABLE_ID,
};
struct attribute_group;
struct iscsi_boot_kobj {
@@ -127,6 +133,13 @@ iscsi_boot_create_target(struct iscsi_boot_kset *boot_kset, int index,
umode_t (*is_visible) (void *data, int type),
void (*release) (void *data));
struct iscsi_boot_kobj *
iscsi_boot_create_acpitbl(struct iscsi_boot_kset *boot_kset, int index,
void *data,
ssize_t (*show)(void *data, int type, char *buf),
umode_t (*is_visible)(void *data, int type),
void (*release)(void *data));
struct iscsi_boot_kset *iscsi_boot_create_kset(const char *set_name);
struct iscsi_boot_kset *iscsi_boot_create_host_kset(unsigned int hostno);
void iscsi_boot_destroy_kset(struct iscsi_boot_kset *boot_kset);