1 /*-
2 * Copyright (c) 1998 Michael Smith <[email protected]>
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
32 #include "bootstrap.h"
33 #include "libofw.h"
34 #include "libzfs.h"
35
36 static int ofw_parsedev(struct ofw_devdesc **, const char *, const char **);
37
38 /*
39 * Point (dev) at an allocated device specifier for the device matching the
40 * path in (devspec). If it contains an explicit device specification,
41 * use that. If not, use the default device.
42 */
43 int
ofw_getdev(void ** vdev,const char * devspec,const char ** path)44 ofw_getdev(void **vdev, const char *devspec, const char **path)
45 {
46 struct ofw_devdesc **dev = (struct ofw_devdesc **)vdev;
47 int rv;
48
49 /*
50 * If it looks like this is just a path and no
51 * device, go with the current device.
52 */
53 if ((devspec == NULL) ||
54 ((strchr(devspec, '@') == NULL) &&
55 (strchr(devspec, ':') == NULL))) {
56
57 if (((rv = ofw_parsedev(dev, getenv("currdev"), NULL)) == 0) &&
58 (path != NULL))
59 *path = devspec;
60 return(rv);
61 }
62
63 /*
64 * Try to parse the device name off the beginning of the devspec
65 */
66 return(ofw_parsedev(dev, devspec, path));
67 }
68
69 /*
70 * Point (dev) at an allocated device specifier matching the string version
71 * at the beginning of (devspec). Return a pointer to the remaining
72 * text in (path).
73 */
74 static int
ofw_parsedev(struct ofw_devdesc ** dev,const char * devspec,const char ** path)75 ofw_parsedev(struct ofw_devdesc **dev, const char *devspec, const char **path)
76 {
77 struct ofw_devdesc *idev;
78 struct devsw *dv;
79 phandle_t handle;
80 const char *p;
81 const char *s;
82 char *ep;
83 char name[256];
84 char type[64];
85 int err;
86 int len;
87 int i;
88
89 for (p = s = devspec; *s != '\0'; p = s) {
90 if ((s = strchr(p + 1, '/')) == NULL)
91 s = strchr(p, '\0');
92 len = s - devspec;
93 bcopy(devspec, name, len);
94 name[len] = '\0';
95 if ((handle = OF_finddevice(name)) == -1) {
96 bcopy(name, type, len);
97 type[len] = '\0';
98 } else if (OF_getprop(handle, "device_type", type, sizeof(type)) == -1)
99 continue;
100 for (i = 0; (dv = devsw[i]) != NULL; i++) {
101 if (strncmp(dv->dv_name, type, strlen(dv->dv_name)) == 0)
102 goto found;
103 }
104 }
105 return(ENOENT);
106
107 found:
108 if (path != NULL)
109 *path = s;
110 idev = malloc(sizeof(struct ofw_devdesc));
111 if (idev == NULL) {
112 printf("ofw_parsedev: malloc failed\n");
113 return ENOMEM;
114 }
115 strcpy(idev->d_path, name);
116 idev->dd.d_dev = dv;
117 if (dv->dv_type == DEVT_ZFS) {
118 p = devspec + strlen(dv->dv_name);
119 err = zfs_parsedev((struct zfs_devdesc *)idev, p, path);
120 if (err != 0) {
121 free(idev);
122 return (err);
123 }
124 }
125
126 if (dev == NULL) {
127 free(idev);
128 } else {
129 *dev = idev;
130 }
131 return(0);
132 }
133
134 int
ofw_setcurrdev(struct env_var * ev,int flags,const void * value)135 ofw_setcurrdev(struct env_var *ev, int flags, const void *value)
136 {
137 struct ofw_devdesc *ncurr;
138 int rv;
139
140 if ((rv = ofw_parsedev(&ncurr, value, NULL)) != 0)
141 return (rv);
142
143 free(ncurr);
144
145 return (mount_currdev(ev, flags, value));
146 }
147