89b50f6b4d
Fix EFI boot support when presented with multiple valid boot partitions across multiple devices. It now prefers to boot from partitions that are present on the underlying device that the boot1 image was loaded from. This means that it will boot from the partitions on device the user chose from EFI boot menu in preference to those on other devices. Also fixed is the recovery from a failed attempt to boot, from a seemingly valid partition, by continuing to trying all other available partitions no matter what the error. boot1 now use * to signify a partition what was accepted from the preferred device and + otherwise. Finally some error messages where improved and DPRINTF's with slowed boot to aid debugging. ZFS will still be preferred over UFS when both are available on the boot device. Reviewed by: imp MFC after: 1 week Sponsored by: Multiplay Differential Revision: https://reviews.freebsd.org/D5108
118 lines
3.5 KiB
C
118 lines
3.5 KiB
C
/*-
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* Copyright (c) 2015 Eric McCorkle
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _BOOT_MODULE_H_
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#define _BOOT_MODULE_H_
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#include <stdbool.h>
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#include <efi.h>
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#include <efilib.h>
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#include <eficonsctl.h>
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#ifdef EFI_DEBUG
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#define DPRINTF(fmt, args...) printf(fmt, ##args)
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#define DSTALL(d) bs->Stall(d)
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#else
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#define DPRINTF(fmt, ...) {}
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#define DSTALL(d) {}
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#endif
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/* EFI device info */
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typedef struct dev_info
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{
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EFI_BLOCK_IO *dev;
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EFI_DEVICE_PATH *devpath;
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EFI_HANDLE *devhandle;
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void *devdata;
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BOOLEAN preferred;
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struct dev_info *next;
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} dev_info_t;
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/*
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* A boot loader module.
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*
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* This is a standard interface for filesystem modules in the EFI system.
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*/
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typedef struct boot_module_t
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{
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const char *name;
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/* init is the optional initialiser for the module. */
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void (*init)();
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/*
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* probe checks to see if the module can handle dev.
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*
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* Return codes:
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* EFI_SUCCESS = The module can handle the device.
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* EFI_NOT_FOUND = The module can not handle the device.
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* Other = The module encountered an error.
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*/
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EFI_STATUS (*probe)(dev_info_t* dev);
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/*
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* load should select the best out of a set of devices that probe
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* indicated were loadable and load the specified file.
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*
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* Return codes:
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* EFI_SUCCESS = The module can handle the device.
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* EFI_NOT_FOUND = The module can not handle the device.
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* Other = The module encountered an error.
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*/
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EFI_STATUS (*load)(const char *filepath, dev_info_t *devinfo,
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void **buf, size_t *bufsize);
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/* status outputs information about the probed devices. */
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void (*status)();
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/* valid devices as found by probe. */
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dev_info_t *(*devices)();
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} boot_module_t;
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/* Standard boot modules. */
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#ifdef EFI_UFS_BOOT
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extern const boot_module_t ufs_module;
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#endif
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#ifdef EFI_ZFS_BOOT
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extern const boot_module_t zfs_module;
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#endif
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/* Functions available to modules. */
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extern void add_device(dev_info_t **devinfop, dev_info_t *devinfo);
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extern void panic(const char *fmt, ...) __dead2;
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extern int printf(const char *fmt, ...);
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extern int vsnprintf(char *str, size_t sz, const char *fmt, va_list ap);
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extern EFI_SYSTEM_TABLE *systab;
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extern EFI_BOOT_SERVICES *bs;
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extern int devpath_strlcat(char *buf, size_t size, EFI_DEVICE_PATH *devpath);
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extern char *devpath_str(EFI_DEVICE_PATH *devpath);
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#endif
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