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