1 /*-
2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <stand.h>
31 #include <string.h>
32
33 #include "bootstrap.h"
34 #include "disk.h"
35
36 static int beri_arch_parsedev(struct disk_devdesc **dev,
37 const char *devspec, const char **path);
38
39 /*
40 * Point (dev) at an allocated device specifier for the device matching the
41 * path in (devspec). If it contains an explicit device specification,
42 * use that. If not, use the default device.
43 */
44 int
beri_arch_getdev(void ** vdev,const char * devspec,const char ** path)45 beri_arch_getdev(void **vdev, const char *devspec, const char **path)
46 {
47 struct disk_devdesc **dev = (struct disk_devdesc **)vdev;
48 int rv;
49
50 /*
51 * If it looks like this is just a path and no
52 * device, go with the current device.
53 */
54 if ((devspec == NULL) ||
55 (devspec[0] == '/') ||
56 (strchr(devspec, ':') == NULL)) {
57
58 if (((rv = beri_arch_parsedev(dev, getenv("currdev"), NULL)) == 0) &&
59 (path != NULL))
60 *path = devspec;
61 return(rv);
62 }
63
64 /*
65 * Try to parse the device name off the beginning of the devspec
66 */
67 return(beri_arch_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 * disk<unit>[s<slice>][<partition>]:
82 *
83 */
84 static int
beri_arch_parsedev(struct disk_devdesc ** dev,const char * devspec,const char ** path)85 beri_arch_parsedev(struct disk_devdesc **dev, const char *devspec,
86 const char **path)
87 {
88 struct disk_devdesc *idev;
89 struct devsw *dv;
90 int i, unit, err;
91 const char *cp;
92 const char *np;
93
94 /* minimum length check */
95 if (strlen(devspec) < 2)
96 return(EINVAL);
97
98 /* look for a device that matches */
99 for (i = 0, dv = NULL; devsw[i] != NULL; i++) {
100 if (!strncmp(devspec, devsw[i]->dv_name, strlen(devsw[i]->dv_name))) {
101 dv = devsw[i];
102 break;
103 }
104 }
105 if (dv == NULL)
106 return(ENOENT);
107 idev = malloc(sizeof(struct disk_devdesc));
108 err = 0;
109 np = (devspec + strlen(dv->dv_name));
110
111 switch(dv->dv_type) {
112 case DEVT_NONE: /* XXX what to do here? Do we care? */
113 break;
114
115 case DEVT_DISK:
116 err = disk_parsedev(idev, np, path);
117 if (err != 0)
118 goto fail;
119 break;
120
121 case DEVT_CD:
122 case DEVT_NET:
123 case DEVT_ZFS:
124 unit = 0;
125
126 if (*np && (*np != ':')) {
127 unit = strtol(np, &cp, 0); /* get unit number if present */
128 if (cp == np) {
129 err = EUNIT;
130 goto fail;
131 }
132 } else {
133 cp = np;
134 }
135 if (*cp && (*cp != ':')) {
136 err = EINVAL;
137 goto fail;
138 }
139
140 idev->d_unit = unit;
141 if (path != NULL)
142 *path = (*cp == 0) ? cp : cp + 1;
143 break;
144
145 default:
146 err = EINVAL;
147 goto fail;
148 }
149 idev->d_dev = dv;
150 idev->d_type = dv->dv_type;
151 if (dev == NULL) {
152 free(idev);
153 } else {
154 *dev = idev;
155 }
156 return(0);
157
158 fail:
159 free(idev);
160 return(err);
161 }
162
163
164 char *
beri_arch_fmtdev(void * vdev)165 beri_arch_fmtdev(void *vdev)
166 {
167 struct disk_devdesc *dev = (struct disk_devdesc *)vdev;
168 static char buf[128]; /* XXX device length constant? */
169
170 switch(dev->d_type) {
171 case DEVT_NONE:
172 strcpy(buf, "(no device)");
173 break;
174
175 case DEVT_CD:
176 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
177 break;
178
179 case DEVT_DISK:
180 return (disk_fmtdev(vdev));
181
182 case DEVT_NET:
183 case DEVT_ZFS:
184 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit);
185 break;
186 }
187 return(buf);
188 }
189
190
191 /*
192 * Set currdev to suit the value being supplied in (value)
193 */
194 int
beri_arch_setcurrdev(struct env_var * ev,int flags,const void * value)195 beri_arch_setcurrdev(struct env_var *ev, int flags, const void *value)
196 {
197 struct disk_devdesc *ncurr;
198 int rv;
199
200 if ((rv = beri_arch_parsedev(&ncurr, value, NULL)) != 0)
201 return(rv);
202 free(ncurr);
203 env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);
204 return(0);
205 }
206