devopen.c revision 1.6
1 /* $NetBSD: devopen.c,v 1.6 2019/08/18 02:18:24 manu 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 61 #include <biosdisk.h> 62 #include "devopen.h" 63 #include <bootinfo.h> 64 #include "efidisk.h" 65 66 static int 67 dev2bios(char *devname, int unit, int *biosdev) 68 { 69 70 if (strcmp(devname, "hd") == 0) 71 *biosdev = 0x80 + unit; 72 else if (strcmp(devname, "cd") == 0) 73 *biosdev = 0x80 + get_harddrives() + unit; 74 else 75 return ENXIO; 76 77 return 0; 78 } 79 80 void 81 bios2dev(int biosdev, daddr_t sector, char **devname, int *unit, 82 int *partition, const char **part_name) 83 { 84 static char savedevname[MAXDEVNAME+1]; 85 86 *unit = biosdev & 0x7f; 87 88 if (efi_bootdp_type == BOOT_DEVICE_TYPE_NET) { 89 *devname = "net"; 90 *unit = efi_net_get_booted_interface_unit(); 91 if (*unit < 0) 92 *unit = 0; 93 *partition = 0; 94 return; 95 } else if (biosdev >= 0x80 + get_harddrives()) { 96 *devname = "cd"; 97 *unit -= get_harddrives(); 98 } else 99 *devname = "hd"; 100 101 (void)biosdisk_findpartition(biosdev, sector, partition, part_name); 102 if (*part_name != NULL) { 103 snprintf(savedevname, MAXDEVNAME, "NAME=%s", *part_name); 104 *devname = savedevname; 105 } 106 } 107 108 struct btinfo_bootpath bibp; 109 extern bool kernel_loaded; 110 111 /* 112 * Open the EFI disk device 113 */ 114 int 115 devopen(struct open_file *f, const char *fname, char **file) 116 { 117 #if defined(SUPPORT_NFS) || defined(SUPPORT_TFTP) 118 static const char *net_devnames[] = { 119 #if defined(SUPPORT_NFS) 120 "nfs", 121 #endif 122 #if defined(SUPPORT_TFTP) 123 "tftp", 124 #endif 125 }; 126 #endif 127 struct devdesc desc; 128 struct devsw *dev; 129 char *fsname, *devname; 130 int unit, partition; 131 int biosdev; 132 int i, n, error; 133 134 error = parsebootfile(fname, &fsname, &devname, &unit, &partition, 135 (const char **) file); 136 if (error) 137 return error; 138 139 /* Search by GPT label or raidframe name */ 140 if ((strstr(devname, "NAME=") == devname) || 141 (strstr(devname, "raid") == devname)) { 142 f->f_dev = &devsw[0]; /* must be biosdisk */ 143 144 if (!kernel_loaded) { 145 strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath)); 146 BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp)); 147 } 148 149 error = biosdisk_open_name(f, devname); 150 return error; 151 } 152 153 memcpy(file_system, file_system_disk, sizeof(*file_system) * nfsys); 154 nfsys = nfsys_disk; 155 156 #if defined(SUPPORT_NFS) || defined(SUPPORT_TFTP) 157 for (i = 0; i < __arraycount(net_devnames); i++) { 158 if (strcmp(devname, net_devnames[i]) == 0) { 159 fsname = devname; 160 devname = "net"; 161 break; 162 } 163 } 164 #endif 165 166 for (i = 1; i < ndevs; i++) { 167 dev = &devsw[i]; 168 if (strcmp(devname, DEV_NAME(dev)) == 0) { 169 if (strcmp(devname, "net") == 0) { 170 n = 0; 171 #if defined(SUPPORT_NFS) 172 if (strcmp(fsname, "nfs") == 0) { 173 memcpy(&file_system[n++], &file_system_nfs, 174 sizeof(file_system_nfs)); 175 } else 176 #endif 177 #if defined(SUPPORT_TFTP) 178 if (strcmp(fsname, "tftp") == 0) { 179 memcpy(&file_system[n++], &file_system_tftp, 180 sizeof(file_system_tftp)); 181 } else 182 #endif 183 { 184 #if defined(SUPPORT_NFS) 185 memcpy(&file_system[n++], &file_system_nfs, 186 sizeof(file_system_nfs)); 187 #endif 188 #if defined(SUPPORT_TFTP) 189 memcpy(&file_system[n++], &file_system_tftp, 190 sizeof(file_system_tftp)); 191 #endif 192 } 193 nfsys = n; 194 195 try_bootp = 1; 196 } 197 198 memset(&desc, 0, sizeof(desc)); 199 strlcpy(desc.d_name, devname, sizeof(desc.d_name)); 200 desc.d_unit = unit; 201 202 f->f_dev = dev; 203 if (!kernel_loaded) { 204 strncpy(bibp.bootpath, *file, 205 sizeof(bibp.bootpath)); 206 BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp)); 207 } 208 return DEV_OPEN(f->f_dev)(f, &desc); 209 } 210 } 211 212 /* 213 * biosdisk 214 */ 215 if (strcmp(devname, "esp") == 0) { 216 bios2dev(boot_biosdev, boot_biossector, &devname, &unit, 217 &partition, NULL); 218 if (efidisk_get_efi_system_partition(boot_biosdev, &partition)) 219 return ENXIO; 220 } 221 222 error = dev2bios(devname, unit, &biosdev); 223 if (error) 224 return error; 225 226 f->f_dev = &devsw[0]; /* must be biosdisk */ 227 228 if (!kernel_loaded) { 229 strncpy(bibp.bootpath, *file, sizeof(bibp.bootpath)); 230 BI_ADD(&bibp, BTINFO_BOOTPATH, sizeof(bibp)); 231 } 232 233 return biosdisk_open(f, biosdev, partition); 234 } 235
Indexes created Tue Sep 30 07:10:03 GMT 2025