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