1 /*- 2 * Copyright (c) 2013,2014 Juniper Networks, Inc. 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 <sys/types.h> 31 #include <sys/stat.h> 32 #include <assert.h> 33 #include <err.h> 34 #include <errno.h> 35 #include <limits.h> 36 #include <stdint.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <unistd.h> 40 41 #include "image.h" 42 #include "mkimg.h" 43 #include "scheme.h" 44 45 static struct { 46 const char *name; 47 enum alias alias; 48 } scheme_alias[] = { 49 { "ebr", ALIAS_EBR }, 50 { "efi", ALIAS_EFI }, 51 { "fat16b", ALIAS_FAT16B }, 52 { "fat32", ALIAS_FAT32 }, 53 { "freebsd", ALIAS_FREEBSD }, 54 { "freebsd-boot", ALIAS_FREEBSD_BOOT }, 55 { "freebsd-nandfs", ALIAS_FREEBSD_NANDFS }, 56 { "freebsd-swap", ALIAS_FREEBSD_SWAP }, 57 { "freebsd-ufs", ALIAS_FREEBSD_UFS }, 58 { "freebsd-vinum", ALIAS_FREEBSD_VINUM }, 59 { "freebsd-zfs", ALIAS_FREEBSD_ZFS }, 60 { "mbr", ALIAS_MBR }, 61 { "ntfs", ALIAS_NTFS }, 62 { "prepboot", ALIAS_PPCBOOT }, 63 { NULL, ALIAS_NONE } /* Keep last! */ 64 }; 65 66 static struct mkimg_scheme *first; 67 static struct mkimg_scheme *scheme; 68 static void *bootcode; 69 70 static enum alias 71 scheme_parse_alias(const char *name) 72 { 73 u_int idx; 74 75 idx = 0; 76 while (scheme_alias[idx].name != NULL) { 77 if (strcasecmp(scheme_alias[idx].name, name) == 0) 78 return (scheme_alias[idx].alias); 79 idx++; 80 } 81 return (ALIAS_NONE); 82 } 83 84 struct mkimg_scheme * 85 scheme_iterate(struct mkimg_scheme *s) 86 { 87 88 return ((s == NULL) ? first : s->next); 89 } 90 91 void 92 scheme_register(struct mkimg_scheme *s) 93 { 94 s->next = first; 95 first = s; 96 } 97 98 int 99 scheme_select(const char *spec) 100 { 101 struct mkimg_scheme *s; 102 103 s = NULL; 104 while ((s = scheme_iterate(s)) != NULL) { 105 if (strcasecmp(spec, s->name) == 0) { 106 scheme = s; 107 return (0); 108 } 109 } 110 return (EINVAL); 111 } 112 113 struct mkimg_scheme * 114 scheme_selected(void) 115 { 116 117 return (scheme); 118 } 119 120 int 121 scheme_bootcode(int fd) 122 { 123 struct stat sb; 124 125 if (scheme == NULL || scheme->bootcode == 0) 126 return (ENXIO); 127 128 if (fstat(fd, &sb) == -1) 129 return (errno); 130 if (sb.st_size > scheme->bootcode) 131 return (EFBIG); 132 133 bootcode = malloc(scheme->bootcode); 134 if (bootcode == NULL) 135 return (ENOMEM); 136 memset(bootcode, 0, scheme->bootcode); 137 if (read(fd, bootcode, sb.st_size) != sb.st_size) { 138 free(bootcode); 139 bootcode = NULL; 140 return (errno); 141 } 142 return (0); 143 } 144 145 int 146 scheme_check_part(struct part *p) 147 { 148 struct mkimg_alias *iter; 149 enum alias alias; 150 151 assert(scheme != NULL); 152 153 /* Check the partition type alias */ 154 alias = scheme_parse_alias(p->alias); 155 if (alias == ALIAS_NONE) 156 return (EINVAL); 157 158 iter = scheme->aliases; 159 while (iter->alias != ALIAS_NONE) { 160 if (alias == iter->alias) 161 break; 162 iter++; 163 } 164 if (iter->alias == ALIAS_NONE) 165 return (EINVAL); 166 p->type = iter->type; 167 168 /* Validate the optional label. */ 169 if (p->label != NULL) { 170 if (strlen(p->label) > scheme->labellen) 171 return (EINVAL); 172 } 173 174 return (0); 175 } 176 177 u_int 178 scheme_max_parts(void) 179 { 180 181 return ((scheme == NULL) ? 0 : scheme->nparts); 182 } 183 184 u_int 185 scheme_max_secsz(void) 186 { 187 188 return ((scheme == NULL) ? INT_MAX+1U : scheme->maxsecsz); 189 } 190 191 lba_t 192 scheme_metadata(u_int where, lba_t start) 193 { 194 195 return ((scheme == NULL) ? start : scheme->metadata(where, start)); 196 } 197 198 int 199 scheme_write(lba_t end) 200 { 201 202 return ((scheme == NULL) ? 0 : scheme->write(end, bootcode)); 203 } 204