1 /*-
2 * Copyright (c) 2015 Eric McCorkle
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: stable/10/sys/boot/efi/boot1/zfs_module.c 321660 2017-07-28 18:35:29Z dim $
27 */
28 #include <stddef.h>
29 #include <stdarg.h>
30 #include <stdbool.h>
31 #include <sys/cdefs.h>
32 #include <sys/param.h>
33 #include <sys/queue.h>
34 #include <efi.h>
35
36 #include "boot_module.h"
37
38 #include "libzfs.h"
39 #include "zfsimpl.c"
40
41 static dev_info_t *devices;
42
43 static int
vdev_read(vdev_t * vdev,void * priv,off_t off,void * buf,size_t bytes)44 vdev_read(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes)
45 {
46 dev_info_t *devinfo;
47 off_t lba;
48 EFI_STATUS status;
49
50 devinfo = (dev_info_t *)priv;
51 lba = off / devinfo->dev->Media->BlockSize;
52
53 status = devinfo->dev->ReadBlocks(devinfo->dev,
54 devinfo->dev->Media->MediaId, lba, bytes, buf);
55 if (status != EFI_SUCCESS) {
56 DPRINTF("vdev_read: failed dev: %p, id: %u, lba: %zu, size: %zu,"
57 " status: %lu\n", devinfo->dev,
58 devinfo->dev->Media->MediaId, lba, bytes,
59 EFI_ERROR_CODE(status));
60 return (-1);
61 }
62
63 return (0);
64 }
65
66 static EFI_STATUS
probe(dev_info_t * dev)67 probe(dev_info_t *dev)
68 {
69 spa_t *spa;
70 dev_info_t *tdev;
71 EFI_STATUS status;
72
73 /* ZFS consumes the dev on success so we need a copy. */
74 if ((status = bs->AllocatePool(EfiLoaderData, sizeof(*dev),
75 (void**)&tdev)) != EFI_SUCCESS) {
76 DPRINTF("Failed to allocate tdev (%lu)\n",
77 EFI_ERROR_CODE(status));
78 return (status);
79 }
80 memcpy(tdev, dev, sizeof(*dev));
81
82 if (vdev_probe(vdev_read, tdev, &spa) != 0) {
83 (void)bs->FreePool(tdev);
84 return (EFI_UNSUPPORTED);
85 }
86
87 dev->devdata = spa;
88 add_device(&devices, dev);
89
90 return (EFI_SUCCESS);
91 }
92
93 static EFI_STATUS
load(const char * filepath,dev_info_t * devinfo,void ** bufp,size_t * bufsize)94 load(const char *filepath, dev_info_t *devinfo, void **bufp, size_t *bufsize)
95 {
96 spa_t *spa;
97 struct zfsmount zfsmount;
98 dnode_phys_t dn;
99 struct stat st;
100 int err;
101 void *buf;
102 EFI_STATUS status;
103
104 spa = devinfo->devdata;
105
106 DPRINTF("load: '%s' spa: '%s', devpath: %s\n", filepath, spa->spa_name,
107 devpath_str(devinfo->devpath));
108
109 if ((err = zfs_spa_init(spa)) != 0) {
110 DPRINTF("Failed to load pool '%s' (%d)\n", spa->spa_name, err);
111 return (EFI_NOT_FOUND);
112 }
113
114 if ((err = zfs_mount(spa, 0, &zfsmount)) != 0) {
115 DPRINTF("Failed to mount pool '%s' (%d)\n", spa->spa_name, err);
116 return (EFI_NOT_FOUND);
117 }
118
119 if ((err = zfs_lookup(&zfsmount, filepath, &dn)) != 0) {
120 if (err == ENOENT) {
121 DPRINTF("Failed to find '%s' on pool '%s' (%d)\n",
122 filepath, spa->spa_name, err);
123 return (EFI_NOT_FOUND);
124 }
125 printf("Failed to lookup '%s' on pool '%s' (%d)\n", filepath,
126 spa->spa_name, err);
127 return (EFI_INVALID_PARAMETER);
128 }
129
130 if ((err = zfs_dnode_stat(spa, &dn, &st)) != 0) {
131 printf("Failed to stat '%s' on pool '%s' (%d)\n", filepath,
132 spa->spa_name, err);
133 return (EFI_INVALID_PARAMETER);
134 }
135
136 if ((status = bs->AllocatePool(EfiLoaderData, (UINTN)st.st_size, &buf))
137 != EFI_SUCCESS) {
138 printf("Failed to allocate load buffer %jd for pool '%s' for '%s' "
139 "(%lu)\n", (intmax_t)st.st_size, spa->spa_name, filepath, EFI_ERROR_CODE(status));
140 return (EFI_INVALID_PARAMETER);
141 }
142
143 if ((err = dnode_read(spa, &dn, 0, buf, st.st_size)) != 0) {
144 printf("Failed to read node from %s (%d)\n", spa->spa_name,
145 err);
146 (void)bs->FreePool(buf);
147 return (EFI_INVALID_PARAMETER);
148 }
149
150 *bufsize = st.st_size;
151 *bufp = buf;
152
153 return (EFI_SUCCESS);
154 }
155
156 static void
status()157 status()
158 {
159 spa_t *spa;
160
161 spa = STAILQ_FIRST(&zfs_pools);
162 if (spa == NULL) {
163 printf("%s found no pools\n", zfs_module.name);
164 return;
165 }
166
167 printf("%s found the following pools:", zfs_module.name);
168 STAILQ_FOREACH(spa, &zfs_pools, spa_link)
169 printf(" %s", spa->spa_name);
170
171 printf("\n");
172 }
173
174 static void
init()175 init()
176 {
177
178 zfs_init();
179 }
180
181 static dev_info_t *
_devices()182 _devices()
183 {
184
185 return (devices);
186 }
187
188 const boot_module_t zfs_module =
189 {
190 .name = "ZFS",
191 .init = init,
192 .probe = probe,
193 .load = load,
194 .status = status,
195 .devices = _devices
196 };
197