devicename.c revision 217044
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: head/sys/boot/powerpc/ps3/devicename.c 217044 2011-01-06 04:12:29Z nwhitehorn $"); 29 30#include <sys/disklabel.h> 31 32#include <stand.h> 33#include <string.h> 34 35#include "bootstrap.h" 36 37static int ps3_parsedev(struct devdesc **dev, const char *devspec, 38 const char **path); 39 40/* 41 * Point (dev) at an allocated device specifier for the device matching the 42 * path in (devspec). If it contains an explicit device specification, 43 * use that. If not, use the default device. 44 */ 45int 46ps3_getdev(void **vdev, const char *devspec, const char **path) 47{ 48 struct devdesc **dev = (struct devdesc **)vdev; 49 int rv = 0; 50 51 /* 52 * If it looks like this is just a path and no 53 * device, go with the current device. 54 */ 55 if ((devspec == NULL) || (devspec[0] == '/') || 56 (strchr(devspec, ':') == NULL)) { 57 rv = ps3_parsedev(dev, getenv("currdev"), NULL); 58 59 if (rv == 0 && 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 (ps3_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>[<partition>]: 82 * 83 */ 84static int 85ps3_parsedev(struct devdesc **dev, const char *devspec, const char **path) 86{ 87 struct devdesc *idev; 88 struct devsw *dv; 89 char *cp; 90 const char *np; 91 int i, unit, pnum, ptype, err; 92 93 /* minimum length check */ 94 if (strlen(devspec) < 2) 95 return(EINVAL); 96 97 /* look for a device that matches */ 98 for (i = 0, dv = NULL; devsw[i] != NULL; i++) { 99 if (!strncmp(devspec, devsw[i]->dv_name, 100 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 devdesc)); 108 err = 0; 109 np = (devspec + strlen(dv->dv_name)); 110 111 switch(dv->dv_type) { 112 case DEVT_NONE: 113 break; 114 115#ifdef NOTYET 116 case DEVT_DISK: 117 unit = -1; 118 pnum = -1; 119 ptype = -1; 120 if (*np && (*np != ':')) { 121 /* next comes the unit number */ 122 unit = strtol(np, &cp, 10); 123 if (cp == np) { 124 err = EUNIT; 125 goto fail; 126 } 127 if (*cp && (*cp != ':')) { 128 /* get partition */ 129 if (*cp == 'p' && *(cp + 1) && 130 *(cp + 1) != ':') { 131 pnum = strtol(cp + 1, &cp, 10); 132 ptype = PTYPE_GPT; 133 } else { 134 pnum = *cp - 'a'; 135 ptype = PTYPE_BSDLABEL; 136 if ((pnum < 0) || 137 (pnum >= MAXPARTITIONS)) { 138 err = EPART; 139 goto fail; 140 } 141 cp++; 142 } 143 } 144 } 145 if (*cp && (*cp != ':')) { 146 err = EINVAL; 147 goto fail; 148 } 149 150 idev->d_unit = unit; 151 idev->d_disk.pnum = pnum; 152 idev->d_disk.ptype = ptype; 153 idev->d_disk.data = NULL; 154 if (path != NULL) 155 *path = (*cp == 0) ? cp : cp + 1; 156 break; 157#endif 158 159 case DEVT_NET: 160 /* 161 * PS3 only has one network interface (well, two, but 162 * netbooting over wireless is not something I'm going 163 * to worry about. 164 */ 165 166 idev->d_unit = 0; 167 break; 168 169 default: 170 err = EINVAL; 171 goto fail; 172 } 173 idev->d_dev = dv; 174 idev->d_type = dv->dv_type; 175 if (dev == NULL) { 176 free(idev); 177 } else { 178 *dev = idev; 179 } 180 return (0); 181 182fail: 183 free(idev); 184 return (err); 185} 186 187 188char * 189ps3_fmtdev(void *vdev) 190{ 191 struct devdesc *dev = (struct devdesc *)vdev; 192 char *cp; 193 static char buf[128]; 194 195 switch(dev->d_type) { 196 case DEVT_NONE: 197 strcpy(buf, "(no device)"); 198 break; 199 200#ifdef NOTYET 201 case DEVT_DISK: 202 cp = buf; 203 cp += sprintf(cp, "%s%d", dev->d_dev->dv_name, dev->d_unit); 204 if (dev->d_kind.disk.pnum >= 0) { 205 if (dev->d_kind.disk.ptype == PTYPE_BSDLABEL) 206 cp += sprintf(cp, "%c", 207 dev->d_kind.disk.pnum + 'a'); 208 else if (dev->d_kind.disk.ptype == PTYPE_GPT) 209 cp += sprintf(cp, "p%i", 210 dev->d_kind.disk.pnum); 211 } 212 213 strcat(cp, ":"); 214 break; 215#endif 216 217 case DEVT_NET: 218 sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit); 219 break; 220 } 221 return(buf); 222} 223 224/* 225 * Set currdev to suit the value being supplied in (value). 226 */ 227int 228ps3_setcurrdev(struct env_var *ev, int flags, const void *value) 229{ 230 struct devdesc *ncurr; 231 int rv; 232 233 if ((rv = ps3_parsedev(&ncurr, value, NULL)) != 0) 234 return (rv); 235 free(ncurr); 236 env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL); 237 return (0); 238} 239