1/*-
2 * Copyright (c) 2008-2010 Rui Paulo
3 * Copyright (c) 2006 Marcel Moolenaar
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD$");
30
31#include <sys/param.h>
32#include <stand.h>
33
34#ifdef EFI_ZFS_BOOT
35#include <libzfs.h>
36#endif
37
38#include <efi.h>
39#include <efilib.h>
40
41#include "efizfs.h"
42
43#ifdef EFI_ZFS_BOOT
44static zfsinfo_list_t zfsinfo;
45
46uint64_t pool_guid;
47
48zfsinfo_list_t *
49efizfs_get_zfsinfo_list(void)
50{
51	return (&zfsinfo);
52}
53
54EFI_HANDLE
55efizfs_get_handle_by_guid(uint64_t guid)
56{
57	zfsinfo_t *zi;
58
59	STAILQ_FOREACH(zi, &zfsinfo, zi_link) {
60		if (zi->zi_pool_guid == guid) {
61			return (zi->zi_handle);
62		}
63	}
64	return (NULL);
65}
66
67bool
68efizfs_get_guid_by_handle(EFI_HANDLE handle, uint64_t *guid)
69{
70	zfsinfo_t *zi;
71
72	if (guid == NULL)
73		return (false);
74	STAILQ_FOREACH(zi, &zfsinfo, zi_link) {
75		if (zi->zi_handle == handle) {
76			*guid = zi->zi_pool_guid;
77			return (true);
78		}
79	}
80	return (false);
81}
82
83static void
84insert_zfs(EFI_HANDLE handle, uint64_t guid)
85{
86        zfsinfo_t *zi;
87
88        zi = malloc(sizeof(zfsinfo_t));
89	if (zi != NULL) {
90        	zi->zi_handle = handle;
91        	zi->zi_pool_guid = guid;
92        	STAILQ_INSERT_TAIL(&zfsinfo, zi, zi_link);
93	}
94}
95
96void
97efi_zfs_probe(void)
98{
99	pdinfo_list_t *hdi;
100	pdinfo_t *hd, *pd = NULL;
101	char devname[SPECNAMELEN + 1];
102	uint64_t guid;
103
104	hdi = efiblk_get_pdinfo_list(&efipart_hddev);
105	STAILQ_INIT(&zfsinfo);
106
107	/*
108	 * Find the handle for the boot device. The boot1 did find the
109	 * device with loader binary, now we need to search for the
110	 * same device and if it is part of the zfs pool, we record the
111	 * pool GUID for currdev setup.
112	 */
113	STAILQ_FOREACH(hd, hdi, pd_link) {
114		STAILQ_FOREACH(pd, &hd->pd_part, pd_link) {
115			snprintf(devname, sizeof(devname), "%s%dp%d:",
116			    efipart_hddev.dv_name, hd->pd_unit, pd->pd_unit);
117			guid = 0;
118			if (zfs_probe_dev(devname, &guid) == 0) {
119				insert_zfs(pd->pd_handle, guid);
120				if (pd->pd_handle == boot_img->DeviceHandle)
121					pool_guid = guid;
122			}
123
124		}
125	}
126}
127#endif
128