Michael Brown
636ccb4ca5
The drive specification alone does not necessarily contain enough information to perform a SAN boot (or local disk boot) under UEFI. If the next-stage bootloader is installed in the EFI system partition under a non-standard name (e.g. "\EFI\debian\grubx64.efi") then this explicit boot filename must also be specified. Generalise this concept to use a "SAN boot configuration parameters" structure (currently containing only the optional explicit boot filename), to allow for easy expansion to provide other parameters such as the partition UUID or volume label. Signed-off-by: Michael Brown <mcb30@ipxe.org>
134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
/*
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* Copyright (C) 2017 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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* You can also choose to distribute this program under the terms of
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* the Unmodified Binary Distribution Licence (as given in the file
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* COPYING.UBDL), provided that you have satisfied its requirements.
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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/** @file
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*
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* Dummy SAN device
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*
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*/
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#include <errno.h>
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#include <ipxe/sanboot.h>
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/**
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* Hook dummy SAN device
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*
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* @v drive Drive number
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* @v uris List of URIs
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* @v count Number of URIs
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* @v flags Flags
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* @ret drive Drive number, or negative error
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*/
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static int dummy_san_hook ( unsigned int drive, struct uri **uris,
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unsigned int count, unsigned int flags ) {
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struct san_device *sandev;
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int rc;
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/* Allocate SAN device */
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sandev = alloc_sandev ( uris, count, 0 );
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if ( ! sandev ) {
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rc = -ENOMEM;
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goto err_alloc;
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}
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/* Register SAN device */
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if ( ( rc = register_sandev ( sandev, drive, flags ) ) != 0 ) {
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DBGC ( sandev->drive, "SAN %#02x could not register: %s\n",
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sandev->drive, strerror ( rc ) );
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goto err_register;
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}
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return drive;
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unregister_sandev ( sandev );
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err_register:
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sandev_put ( sandev );
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err_alloc:
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return rc;
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}
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/**
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* Unhook dummy SAN device
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*
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* @v drive Drive number
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*/
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static void dummy_san_unhook ( unsigned int drive ) {
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struct san_device *sandev;
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/* Find drive */
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sandev = sandev_find ( drive );
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if ( ! sandev ) {
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DBGC ( drive, "SAN %#02x does not exist\n", drive );
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return;
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}
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/* Unregister SAN device */
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unregister_sandev ( sandev );
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/* Drop reference to drive */
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sandev_put ( sandev );
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}
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/**
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* Boot from dummy SAN device
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*
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* @v drive Drive number
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* @v config Boot configuration parameters
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* @ret rc Return status code
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*/
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static int dummy_san_boot ( unsigned int drive __unused,
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struct san_boot_config *config __unused ) {
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return -EOPNOTSUPP;
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}
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/**
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* Install ACPI table
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*
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* @v acpi ACPI description header
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* @ret rc Return status code
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*/
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static int dummy_install ( struct acpi_header *acpi ) {
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DBGC ( acpi, "ACPI table %s:\n", acpi_name ( acpi->signature ) );
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DBGC_HDA ( acpi, 0, acpi, le32_to_cpu ( acpi->length ) );
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return 0;
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}
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/**
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* Describe dummy SAN device
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*
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* @ret rc Return status code
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*/
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static int dummy_san_describe ( void ) {
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return acpi_install ( dummy_install );
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}
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PROVIDE_SANBOOT ( dummy, san_hook, dummy_san_hook );
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PROVIDE_SANBOOT ( dummy, san_unhook, dummy_san_unhook );
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PROVIDE_SANBOOT ( dummy, san_boot, dummy_san_boot );
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PROVIDE_SANBOOT ( dummy, san_describe, dummy_san_describe );
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