freebsd-dev/sys/boot/efi/libefi/efizfs.c
Warner Losh 457ea3bce3 Move EFI ZFS functions to libefi
This patch moves some EFI ZFS functions from loader to libefi,
allowing them to be used by anything that links against libefi.

Submitted by: Eric McCorkle
Differential Revision: https://reviews.freebsd.org/D11855
2017-08-04 04:20:06 +00:00

113 lines
3.1 KiB
C

/*-
* Copyright (c) 2008-2010 Rui Paulo
* Copyright (c) 2006 Marcel Moolenaar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/disk.h>
#include <stdint.h>
#ifdef EFI_ZFS_BOOT
#include <libzfs.h>
#endif
#include <efi.h>
#include <efilib.h>
#include "efizfs.h"
#ifdef EFI_ZFS_BOOT
static zfsinfo_list_t zfsinfo;
uint64_t pool_guid;
zfsinfo_list_t *
efizfs_get_zfsinfo_list(void)
{
return (&zfsinfo);
}
static void
insert_zfs(EFI_HANDLE handle, uint64_t guid)
{
zfsinfo_t *zi;
zi = malloc(sizeof(zfsinfo_t));
zi->zi_handle = handle;
zi->zi_pool_guid = guid;
STAILQ_INSERT_TAIL(&zfsinfo, zi, zi_link);
}
void
efi_zfs_probe(void)
{
pdinfo_list_t *hdi;
pdinfo_t *hd, *pd = NULL;
EFI_GUID imgid = LOADED_IMAGE_PROTOCOL;
EFI_LOADED_IMAGE *img;
char devname[SPECNAMELEN + 1];
uint64_t guid;
BS->HandleProtocol(IH, &imgid, (VOID**)&img);
hdi = efiblk_get_pdinfo_list(&efipart_hddev);
STAILQ_INIT(&zfsinfo);
/*
* Find the handle for the boot device. The boot1 did find the
* device with loader binary, now we need to search for the
* same device and if it is part of the zfs pool, we record the
* pool GUID for currdev setup.
*/
STAILQ_FOREACH(hd, hdi, pd_link) {
STAILQ_FOREACH(pd, &hd->pd_part, pd_link) {
snprintf(devname, sizeof(devname), "%s%dp%d:",
efipart_hddev.dv_name, hd->pd_unit, pd->pd_unit);
if (zfs_probe_dev(devname, &guid) == 0) {
insert_zfs(pd->pd_handle, guid);
if (pd->pd_handle == img->DeviceHandle)
pool_guid = guid;
}
}
}
}
uint64_t
ldi_get_size(void *priv)
{
int fd = (uintptr_t) priv;
uint64_t size;
ioctl(fd, DIOCGMEDIASIZE, &size);
return (size);
}
#endif