1 /*-
2 * Copyright (c) 1998 Robert Nordier
3 * All rights reserved.
4 * Copyright (c) 2001 Robert Drehmel
5 * All rights reserved.
6 * Copyright (c) 2014 Nathan Whitehorn
7 * All rights reserved.
8 * Copyright (c) 2015 Eric McCorkle
9 * All rights reverved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <stdarg.h>
34 #include <stdbool.h>
35
36 #include <sys/param.h>
37 #include <sys/disk/bsd.h>
38 #include <efi.h>
39
40 #include "boot_module.h"
41
42 #define BSD_LABEL_BUFFER 8192
43 #define BSD_LABEL_OFFSET DEV_BSIZE
44
45 static dev_info_t *devinfo;
46 static dev_info_t *devices;
47
48 static int
dskread(void * buf,uint64_t lba,int nblk)49 dskread(void *buf, uint64_t lba, int nblk)
50 {
51 int size;
52 EFI_STATUS status;
53
54 lba += devinfo->partoff;
55 lba = lba / (devinfo->dev->Media->BlockSize / DEV_BSIZE);
56 size = nblk * DEV_BSIZE;
57
58 status = devinfo->dev->ReadBlocks(devinfo->dev,
59 devinfo->dev->Media->MediaId, lba, size, buf);
60
61 if (status != EFI_SUCCESS) {
62 DPRINTF("dskread: failed dev: %p, id: %u, lba: %ju, size: %d, "
63 "status: %lu\n", devinfo->dev,
64 devinfo->dev->Media->MediaId, (uintmax_t)lba, size,
65 EFI_ERROR_CODE(status));
66 return (-1);
67 }
68
69 return (0);
70 }
71
72 #include "ufsread.c"
73
74 static struct dmadat __dmadat __aligned(512);
75 static char ufs_buffer[BSD_LABEL_BUFFER] __aligned(512);
76
77 static int
init_dev(dev_info_t * dev)78 init_dev(dev_info_t* dev)
79 {
80 struct disklabel *dl;
81 uint64_t bs;
82 int ok;
83
84 devinfo = dev;
85 dmadat = &__dmadat;
86
87 /*
88 * First try offset 0. This is the typical GPT case where we have no
89 * further partitioning (as well as the degenerate MBR case where
90 * the bsdlabel has a 0 offset).
91 */
92 devinfo->partoff = 0;
93 ok = fsread(0, NULL, 0);
94 if (ok >= 0)
95 return (ok);
96
97 /*
98 * Next, we look for a bsdlabel. This is technically located in sector
99 * 1. For 4k sectors, this offset is 4096, for 512b sectors it's
100 * 512. However, we have to fall back to 512 here because we create
101 * images that assume 512 byte blocks, but these can be put on devices
102 * who have 4k (or other) block sizes. If there's a crazy block size, we
103 * skip the 'at one sector' and go stright to checking at 512 bytes.
104 * There are other offsets that are historic, but we don't probe those
105 * since they were never used for MBR disks on FreeBSD on systems that
106 * could boot UEFI. UEFI is little endian only, as are BSD labels. We
107 * will retry fsread(0) only if there's a label found with a non-zero
108 * offset.
109 */
110 if (dskread(ufs_buffer, 0, BSD_LABEL_BUFFER / DEV_BSIZE) != 0)
111 return (-1);
112 dl = NULL;
113 bs = devinfo->dev->Media->BlockSize;
114 if (bs != 0 && bs <= BSD_LABEL_BUFFER / 2)
115 dl = (struct disklabel *)&ufs_buffer[bs];
116 if (dl == NULL || dl->d_magic != BSD_MAGIC || dl->d_magic2 != BSD_MAGIC)
117 dl = (struct disklabel *)&ufs_buffer[BSD_LABEL_OFFSET];
118 if (dl->d_magic != BSD_MAGIC || dl->d_magic2 != BSD_MAGIC ||
119 dl->d_partitions[0].p_offset == 0)
120 return (-1);
121 devinfo->partoff = dl->d_partitions[0].p_offset;
122 return (fsread(0, NULL, 0));
123 }
124
125 static EFI_STATUS
probe(dev_info_t * dev)126 probe(dev_info_t* dev)
127 {
128
129 if (init_dev(dev) < 0)
130 return (EFI_UNSUPPORTED);
131
132 add_device(&devices, dev);
133
134 return (EFI_SUCCESS);
135 }
136
137 static EFI_STATUS
load(const char * filepath,dev_info_t * dev,void ** bufp,size_t * bufsize)138 load(const char *filepath, dev_info_t *dev, void **bufp, size_t *bufsize)
139 {
140 ufs_ino_t ino;
141 size_t size;
142 ssize_t read;
143 void *buf;
144
145 #ifdef EFI_DEBUG
146 {
147 CHAR16 *text = efi_devpath_name(dev->devpath);
148 DPRINTF("UFS Loading '%s' from %S\n", filepath, text);
149 efi_free_devpath_name(text);
150 }
151 #endif
152 if (init_dev(dev) < 0) {
153 DPRINTF("Failed to init device\n");
154 return (EFI_UNSUPPORTED);
155 }
156
157 if ((ino = lookup(filepath)) == 0) {
158 DPRINTF("Failed to lookup '%s' (file not found?)\n", filepath);
159 return (EFI_NOT_FOUND);
160 }
161
162 if (fsread_size(ino, NULL, 0, &size) < 0 || size <= 0) {
163 printf("Failed to read size of '%s' ino: %d\n", filepath, ino);
164 return (EFI_INVALID_PARAMETER);
165 }
166
167 buf = malloc(size);
168 if (buf == NULL) {
169 printf("Failed to allocate read buffer %zu for '%s'\n",
170 size, filepath);
171 return (EFI_OUT_OF_RESOURCES);
172 }
173
174 read = fsread(ino, buf, size);
175 if ((size_t)read != size) {
176 printf("Failed to read '%s' (%zd != %zu)\n", filepath, read,
177 size);
178 free(buf);
179 return (EFI_INVALID_PARAMETER);
180 }
181
182 DPRINTF("Load complete\n");
183
184 *bufp = buf;
185 *bufsize = size;
186
187 return (EFI_SUCCESS);
188 }
189
190 static void
status(void)191 status(void)
192 {
193 int i;
194 dev_info_t *dev;
195
196 for (dev = devices, i = 0; dev != NULL; dev = dev->next, i++)
197 ;
198
199 printf("%s found ", ufs_module.name);
200 switch (i) {
201 case 0:
202 printf("no partitions\n");
203 break;
204 case 1:
205 printf("%d partition\n", i);
206 break;
207 default:
208 printf("%d partitions\n", i);
209 }
210 }
211
212 static dev_info_t *
_devices(void)213 _devices(void)
214 {
215
216 return (devices);
217 }
218
219 const boot_module_t ufs_module =
220 {
221 .name = "UFS",
222 .probe = probe,
223 .load = load,
224 .status = status,
225 .devices = _devices
226 };
227