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/param.h>
29 #include <stand.h>
30
31 #ifdef EFI_ZFS_BOOT
32 #include <libzfs.h>
33 #endif
34
35 #include <efi.h>
36 #include <efilib.h>
37
38 #include "efizfs.h"
39
40 #ifdef EFI_ZFS_BOOT
41 static zfsinfo_list_t zfsinfo;
42
43 uint64_t pool_guid;
44
45 zfsinfo_list_t *
efizfs_get_zfsinfo_list(void)46 efizfs_get_zfsinfo_list(void)
47 {
48 return (&zfsinfo);
49 }
50
51 EFI_HANDLE
efizfs_get_handle_by_guid(uint64_t guid)52 efizfs_get_handle_by_guid(uint64_t guid)
53 {
54 zfsinfo_t *zi;
55
56 STAILQ_FOREACH(zi, &zfsinfo, zi_link) {
57 if (zi->zi_pool_guid == guid) {
58 return (zi->zi_handle);
59 }
60 }
61 return (NULL);
62 }
63
64 bool
efizfs_get_guid_by_handle(EFI_HANDLE handle,uint64_t * guid)65 efizfs_get_guid_by_handle(EFI_HANDLE handle, uint64_t *guid)
66 {
67 zfsinfo_t *zi;
68
69 if (guid == NULL)
70 return (false);
71 STAILQ_FOREACH(zi, &zfsinfo, zi_link) {
72 if (zi->zi_handle == handle) {
73 *guid = zi->zi_pool_guid;
74 return (true);
75 }
76 }
77 return (false);
78 }
79
80 static void
insert_zfs(EFI_HANDLE handle,uint64_t guid)81 insert_zfs(EFI_HANDLE handle, uint64_t guid)
82 {
83 zfsinfo_t *zi;
84
85 zi = malloc(sizeof(zfsinfo_t));
86 if (zi != NULL) {
87 zi->zi_handle = handle;
88 zi->zi_pool_guid = guid;
89 STAILQ_INSERT_TAIL(&zfsinfo, zi, zi_link);
90 }
91 }
92
93 void
efi_zfs_probe(void)94 efi_zfs_probe(void)
95 {
96 pdinfo_list_t *hdi;
97 pdinfo_t *hd, *pd = NULL;
98 char devname[SPECNAMELEN + 1];
99 uint64_t guid;
100
101 hdi = efiblk_get_pdinfo_list(&efipart_hddev);
102 STAILQ_INIT(&zfsinfo);
103
104 /*
105 * Find the handle for the boot device. The boot1 did find the
106 * device with loader binary, now we need to search for the
107 * same device and if it is part of the zfs pool, we record the
108 * pool GUID for currdev setup.
109 */
110 STAILQ_FOREACH(hd, hdi, pd_link) {
111 STAILQ_FOREACH(pd, &hd->pd_part, pd_link) {
112 snprintf(devname, sizeof(devname), "%s%dp%d:",
113 efipart_hddev.dv_name, hd->pd_unit, pd->pd_unit);
114 guid = 0;
115 if (zfs_probe_dev(devname, &guid, false) == 0) {
116 insert_zfs(pd->pd_handle, guid);
117 if (pd->pd_handle == boot_img->DeviceHandle)
118 pool_guid = guid;
119 }
120
121 }
122 }
123 }
124 #endif
125