1/*-
2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
|
29__FBSDID("$FreeBSD: head/sys/boot/efi/loader/devicename.c 293724 2016-01-12 02:17:39Z smh $");
|
| 29__FBSDID("$FreeBSD: head/sys/boot/efi/loader/devicename.c 294060 2016-01-15 01:22:36Z smh $"); |
30
31#include <stand.h>
32#include <string.h>
33#include <sys/disklabel.h>
|
| 34#include <sys/param.h> |
35#include <bootstrap.h>
36
37#include <efi.h>
38#include <efilib.h>
39
40#include "loader_efi.h"
41
42static int efi_parsedev(struct devdesc **, const char *, const char **);
43
44/*
45 * Point (dev) at an allocated device specifier for the device matching the
46 * path in (devspec). If it contains an explicit device specification,
47 * use that. If not, use the default device.
48 */
49int
50efi_getdev(void **vdev, const char *devspec, const char **path)
51{
52 struct devdesc **dev = (struct devdesc **)vdev;
53 int rv;
54
55 /*
56 * If it looks like this is just a path and no device, then
57 * use the current device instead.
58 */
59 if (devspec == NULL || *devspec == '/' || !strchr(devspec, ':')) {
60 rv = efi_parsedev(dev, getenv("currdev"), NULL);
61 if (rv == 0 && path != NULL)
62 *path = devspec;
63 return (rv);
64 }
65
66 /* Parse the device name off the beginning of the devspec. */
67 return (efi_parsedev(dev, devspec, path));
68}
69
70/*
71 * Point (dev) at an allocated device specifier matching the string version
72 * at the beginning of (devspec). Return a pointer to the remaining
73 * text in (path).
74 *
75 * In all cases, the beginning of (devspec) is compared to the names
76 * of known devices in the device switch, and then any following text
77 * is parsed according to the rules applied to the device type.
78 *
79 * For disk-type devices, the syntax is:
80 *
81 * fs<unit>:
82 */
83static int
84efi_parsedev(struct devdesc **dev, const char *devspec, const char **path)
85{
86 struct devdesc *idev;
87 struct devsw *dv;
88 char *cp;
89 const char *np;
|
89 int i, err;
|
| 90 int i; |
91
92 /* minimum length check */
93 if (strlen(devspec) < 2)
94 return (EINVAL);
95
96 /* look for a device that matches */
97 for (i = 0; devsw[i] != NULL; i++) {
98 dv = devsw[i];
99 if (!strncmp(devspec, dv->dv_name, strlen(dv->dv_name)))
100 break;
101 }
102 if (devsw[i] == NULL)
103 return (ENOENT);
104
|
104 idev = malloc(sizeof(struct devdesc));
105 if (idev == NULL)
106 return (ENOMEM);
|
| 105 np = devspec + strlen(dv->dv_name); |
106
|
108 idev->d_dev = dv;
109 idev->d_type = dv->dv_type;
110 idev->d_unit = -1;
|
107 {
108 idev = malloc(sizeof(struct devdesc));
109 if (idev == NULL)
110 return (ENOMEM); |
111
|
112 err = 0;
113 np = devspec + strlen(dv->dv_name);
114 if (*np != '\0' && *np != ':') {
115 idev->d_unit = strtol(np, &cp, 0);
116 if (cp == np) {
117 idev->d_unit = -1;
118 free(idev);
119 return (EUNIT);
|
112 idev->d_dev = dv;
113 idev->d_type = dv->dv_type;
114 idev->d_unit = -1;
115 if (*np != '\0' && *np != ':') {
116 idev->d_unit = strtol(np, &cp, 0);
117 if (cp == np) {
118 idev->d_unit = -1;
119 free(idev);
120 return (EUNIT);
121 } |
122 }
123 }
|
| 124 |
125 if (*cp != '\0' && *cp != ':') {
126 free(idev);
127 return (EINVAL);
128 }
129
130 if (path != NULL)
131 *path = (*cp == 0) ? cp : cp + 1;
132 if (dev != NULL)
133 *dev = idev;
134 else
135 free(idev);
136 return (0);
137}
138
139char *
140efi_fmtdev(void *vdev)
141{
142 struct devdesc *dev = (struct devdesc *)vdev;
|
140 static char buf[32]; /* XXX device length constant? */
|
| 143 static char buf[SPECNAMELEN + 1]; |
144
145 switch(dev->d_type) {
146 case DEVT_NONE:
147 strcpy(buf, "(no device)");
148 break;
149
150 default:
151 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
152 break;
153 }
154
155 return (buf);
156}
157
158/*
159 * Set currdev to suit the value being supplied in (value)
160 */
161int
162efi_setcurrdev(struct env_var *ev, int flags, const void *value)
163{
164 struct devdesc *ncurr;
165 int rv;
166
167 rv = efi_parsedev(&ncurr, value, NULL);
168 if (rv != 0)
169 return (rv);
170
171 free(ncurr);
172 env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);
173 return (0);
174}
|