1 /* $NetBSD: devopen.c,v 1.14 2023/06/20 07:46:03 rin Exp $ */ 2 3 /*- 4 * Copyright (c) 2005 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Bang Jun-Young. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1996, 1997 34 * Matthias Drochner. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 55 */ 56 57 #include "efiboot.h" 58 59 #include <lib/libsa/dev_net.h> 60 #include <lib/libsa/net.h> 61 62 #include <biosdisk.h> 63 #include "devopen.h" 64 #include <bootinfo.h> 65 #include "efidisk.h" 66 67 static int 68 dev2bios(char *devname, int unit, int *biosdev) 69 { 70 71 if (strcmp(devname, "hd") == 0) 72 *biosdev = 0x80 + unit; 73 else if (strcmp(devname, "cd") == 0) 74 *biosdev = 0x80 + get_harddrives() + unit; 75 else 76 return ENXIO; 77 78 return 0; 79 } 80 81 void 82 bios2dev(int biosdev, daddr_t sector, char **devname, int *unit, 83 int *partition, const char **part_name) 84 { 85 static char savedevname[MAXDEVNAME+1]; 86 87 *unit = biosdev & 0x7f; 88 89 if (efi_bootdp_type == BOOT_DEVICE_TYPE_NET) { 90 *devname = "net"; 91 *unit = efi_net_get_booted_interface_unit(); 92 if (*unit < 0) 93 *unit = 0; 94 *partition = 0; 95 return; 96 } else if (biosdev >= 0x80 + get_harddrives()) { 97 *devname = "cd"; 98 *unit -= get_harddrives(); 99 } else 100 *devname = "hd"; 101 102 (void)biosdisk_findpartition(biosdev, sector, partition, part_name); 103 if (part_name != NULL && *part_name != NULL) { 104 snprintf(savedevname, sizeof(savedevname), 105 "NAME=%s", *part_name); 106 *devname = savedevname; 107 } 108 } 109 110 #if defined(SUPPORT_NFS) || defined(SUPPORT_TFTP) 111 const struct netboot_fstab * 112 netboot_fstab_find(const char *name) 113 { 114 int i; 115 116 if (strcmp(name, "net") == 0) 117 return &netboot_fstab[0]; 118 119 for (i = 0; i < nnetboot_fstab; i++) { 120 if (strcmp(name, netboot_fstab[i].name) == 0) 121 return &netboot_fstab[i]; 122 } 123 124 return NULL; 125 } 126 127 static const struct netboot_fstab * 128 netboot_fstab_findn(const char *name, size_t len) 129 { 130 int i; 131 132 if (strncmp(name, "net", len) == 0) 133 return &netboot_fstab[0]; 134 135 for (i = 0; i < nnetboot_fstab; i++) { 136 if (strncmp(name, netboot_fstab[i].name, len) == 0) 137 return &netboot_fstab[i]; 138 } 139 140 return NULL; 141 } 142 #endif 143 144 struct btinfo_bootpath bibp; 145 extern bool kernel_loaded; 146 147 /* 148 * Open the EFI disk device 149 */ 150 int 151 devopen(struct open_file *f, const char *fname, char **file) 152 { 153 char *fsname, *devname; 154 const char *xname = NULL; 155 int unit, partition; 156 int biosdev; 157 int error; 158 #if defined(SUPPORT_NFS) || defined(SUPPORT_TFTP) 159 struct devdesc desc; 160 const struct netboot_fstab *nf; 161 char *filename; 162 size_t fsnamelen; 163 int i, n; 164 #endif 165 166 error = parsebootfile(fname, &fsname, &devname, &unit, &partition, 167 (const char **) file); 168 if (error) 169 return error; 170 171 memcpy(file_system, file_system_disk, 172 sizeof(struct fs_ops) * nfsys_disk); 173 nfsys = nfsys_disk; 174 175 /* Search by GPT label or raidframe name */ 176 if (strstr(devname, "NAME=") == devname) 177 xname = devname; 178 if (strstr(devname, "raid") == devname) 179 xname = fname; 180 181 if (xname != NULL) { 182 f->f_dev = &devsw[0]; /* must be biosdisk */ 183 184 if (!kernel_loaded) { 185 strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath)); 186 BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp)); 187 } 188 189 error = biosdisk_open_name(f, xname); 190 return error; 191 } 192 193 /* 194 * Network 195 */ 196 #if defined(SUPPORT_NFS) || defined(SUPPORT_TFTP) 197 nf = netboot_fstab_find(devname); 198 if (nf != NULL) { 199 n = 0; 200 if (strcmp(devname, "net") == 0) { 201 for (i = 0; i < nnetboot_fstab; i++) { 202 memcpy(&file_system[n++], netboot_fstab[i].ops, 203 sizeof(struct fs_ops)); 204 } 205 } else { 206 memcpy(&file_system[n++], nf->ops, 207 sizeof(struct fs_ops)); 208 } 209 nfsys = n; 210 211 #ifdef SUPPORT_BOOTP 212 try_bootp = 1; 213 #endif 214 215 /* If we got passed a filename, pass it to the BOOTP server. */ 216 if (fname) { 217 filename = strchr(fname, ':'); 218 if (filename != NULL) 219 filename++; 220 else 221 filename = (char *)fname; 222 strlcpy(bootfile, filename, sizeof(bootfile)); 223 } 224 225 memset(&desc, 0, sizeof(desc)); 226 strlcpy(desc.d_name, "net", sizeof(desc.d_name)); 227 desc.d_unit = unit; 228 229 f->f_dev = &devsw[1]; /* must be net */ 230 if (!kernel_loaded) { 231 strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath)); 232 BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp)); 233 } 234 error = DEV_OPEN(f->f_dev)(f, &desc); 235 if (error) 236 return error; 237 238 /* 239 * If the DHCP server provided a file name: 240 * - If it contains a ":", assume it points to a NetBSD kernel. 241 * - If not, assume that the DHCP server was not able to pass 242 * a separate filename for the kernel. (The name probably was 243 * the same as used to load "efiboot".) Ignore it and use 244 * the default in this case. 245 * So we cater to simple DHCP servers while being able to use 246 * the power of conditional behaviour in modern ones. 247 */ 248 filename = strchr(bootfile, ':'); 249 if (filename != NULL) { 250 fname = bootfile; 251 252 fsnamelen = filename - fname; 253 nf = netboot_fstab_findn(fname, fsnamelen); 254 if (nf == NULL || 255 strncmp(fname, "net", fsnamelen) == 0) { 256 printf("Invalid file system type specified in " 257 "%s\n", fname); 258 error = EINVAL; 259 goto neterr; 260 } 261 262 memcpy(file_system, nf->ops, sizeof(struct fs_ops)); 263 nfsys = 1; 264 } 265 266 filename = fname ? strchr(fname, ':') : NULL; 267 if (filename != NULL) { 268 filename++; 269 if (*filename == '\0') { 270 printf("No file specified in %s\n", fname); 271 error = EINVAL; 272 goto neterr; 273 } 274 } else 275 filename = (char *)fname; 276 277 *file = filename; 278 return 0; 279 280 neterr: 281 DEV_CLOSE(f->f_dev)(f); 282 f->f_dev = NULL; 283 return error; 284 } 285 #endif 286 287 /* 288 * biosdisk 289 */ 290 if (strcmp(devname, "esp") == 0) { 291 bios2dev(boot_biosdev, boot_biossector, &devname, &unit, 292 &partition, NULL); 293 if (efidisk_get_efi_system_partition(boot_biosdev, &partition)) 294 return ENXIO; 295 } 296 297 error = dev2bios(devname, unit, &biosdev); 298 if (error) 299 return error; 300 301 f->f_dev = &devsw[0]; /* must be biosdisk */ 302 303 if (!kernel_loaded) { 304 strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath)); 305 BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp)); 306 } 307 308 return biosdisk_open(f, biosdev, partition); 309 } 310
Indexes created Mon Sep 29 03:10:08 GMT 2025