devopen.c revision 1.8
1 /* $NetBSD: devopen.c,v 1.8 2019/09/26 12:21:03 nonaka 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) { 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 int unit, partition; 155 int biosdev; 156 int i, error; 157 #if defined(SUPPORT_NFS) || defined(SUPPORT_TFTP) 158 struct devdesc desc; 159 const struct netboot_fstab *nf; 160 char *filename; 161 size_t fsnamelen; 162 int n; 163 #endif 164 165 error = parsebootfile(fname, &fsname, &devname, &unit, &partition, 166 (const char **) file); 167 if (error) 168 return error; 169 170 memcpy(file_system, file_system_disk, 171 sizeof(struct fs_ops) * nfsys_disk); 172 nfsys = nfsys_disk; 173 174 /* Search by GPT label or raidframe name */ 175 if ((strstr(devname, "NAME=") == devname) || 176 (strstr(devname, "raid") == devname)) { 177 f->f_dev = &devsw[0]; /* must be biosdisk */ 178 179 if (!kernel_loaded) { 180 strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath)); 181 BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp)); 182 } 183 184 error = biosdisk_open_name(f, devname); 185 return error; 186 } 187 188 /* 189 * Network 190 */ 191 #if defined(SUPPORT_NFS) || defined(SUPPORT_TFTP) 192 nf = netboot_fstab_find(devname); 193 if (nf != NULL) { 194 n = 0; 195 if (strcmp(devname, "net") == 0) { 196 for (i = 0; i < nnetboot_fstab; i++) { 197 memcpy(&file_system[n++], netboot_fstab[i].ops, 198 sizeof(struct fs_ops)); 199 } 200 } else { 201 memcpy(&file_system[n++], nf->ops, 202 sizeof(struct fs_ops)); 203 } 204 nfsys = n; 205 206 #ifdef SUPPORT_BOOTP 207 try_bootp = 1; 208 #endif 209 210 /* If we got passed a filename, pass it to the BOOTP server. */ 211 if (fname) { 212 filename = strchr(fname, ':'); 213 if (filename != NULL) 214 filename++; 215 else 216 filename = (char *)fname; 217 strlcpy(bootfile, filename, sizeof(bootfile)); 218 } 219 220 memset(&desc, 0, sizeof(desc)); 221 strlcpy(desc.d_name, "net", sizeof(desc.d_name)); 222 desc.d_unit = unit; 223 224 f->f_dev = &devsw[1]; /* must be net */ 225 if (!kernel_loaded) { 226 strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath)); 227 BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp)); 228 } 229 error = DEV_OPEN(f->f_dev)(f, &desc); 230 if (error) 231 return error; 232 233 /* 234 * If the DHCP server provided a file name: 235 * - If it contains a ":", assume it points to a NetBSD kernel. 236 * - If not, assume that the DHCP server was not able to pass 237 * a separate filename for the kernel. (The name probably was 238 * the same as used to load "efiboot".) Ignore it and use 239 * the default in this case. 240 * So we cater to simple DHCP servers while being able to use 241 * the power of conditional behaviour in modern ones. 242 */ 243 filename = strchr(bootfile, ':'); 244 if (filename != NULL) { 245 fname = bootfile; 246 247 fsnamelen = filename - fname; 248 nf = netboot_fstab_findn(fname, fsnamelen); 249 if (nf == NULL || 250 strncmp(fname, "net", fsnamelen) == 0) { 251 printf("Invalid file system type specified in " 252 "%s\n", fname); 253 error = EINVAL; 254 goto neterr; 255 } 256 257 memcpy(file_system, nf->ops, sizeof(struct fs_ops)); 258 nfsys = 1; 259 } 260 261 filename = fname ? strchr(fname, ':') : NULL; 262 if (filename != NULL) { 263 filename++; 264 if (*filename == '\0') { 265 printf("No file specified in %s\n", fname); 266 error = EINVAL; 267 goto neterr; 268 } 269 } else 270 filename = (char *)fname; 271 272 *file = filename; 273 return 0; 274 275 neterr: 276 DEV_CLOSE(f->f_dev)(f); 277 f->f_dev = NULL; 278 return error; 279 } 280 #endif 281 282 /* 283 * biosdisk 284 */ 285 if (strcmp(devname, "esp") == 0) { 286 bios2dev(boot_biosdev, boot_biossector, &devname, &unit, 287 &partition, NULL); 288 if (efidisk_get_efi_system_partition(boot_biosdev, &partition)) 289 return ENXIO; 290 } 291 292 error = dev2bios(devname, unit, &biosdev); 293 if (error) 294 return error; 295 296 f->f_dev = &devsw[0]; /* must be biosdisk */ 297 298 if (!kernel_loaded) { 299 strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath)); 300 BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp)); 301 } 302 303 return biosdisk_open(f, biosdev, partition); 304 } 305
Indexes created Tue Sep 30 07:10:03 GMT 2025