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 <errno.h> 33 #include <limits.h> 34 #include <stdlib.h> 35 #include <string.h> 36 #include <unistd.h> 37 38 #include "image.h" 39 #include "mkimg.h" 40 #include "scheme.h" 41 42 static struct { 43 const char *name; 44 enum alias alias; 45 } scheme_alias[] = { 46 { "ebr", ALIAS_EBR }, 47 { "efi", ALIAS_EFI }, 48 { "fat16b", ALIAS_FAT16B }, 49 { "fat32", ALIAS_FAT32 }, 50 { "fat32lba", ALIAS_FAT32LBA }, 51 { "freebsd", ALIAS_FREEBSD }, 52 { "freebsd-boot", ALIAS_FREEBSD_BOOT }, 53 { "freebsd-nandfs", ALIAS_FREEBSD_NANDFS }, 54 { "freebsd-swap", ALIAS_FREEBSD_SWAP }, 55 { "freebsd-ufs", ALIAS_FREEBSD_UFS }, 56 { "freebsd-vinum", ALIAS_FREEBSD_VINUM }, 57 { "freebsd-zfs", ALIAS_FREEBSD_ZFS }, 58 { "mbr", ALIAS_MBR }, 59 { "ntfs", ALIAS_NTFS }, 60 { "prepboot", ALIAS_PPCBOOT }, 61 { NULL, ALIAS_NONE } /* Keep last! */ 62 }; 63 64 static struct mkimg_scheme *first; 65 static struct mkimg_scheme *scheme; 66 static void *bootcode; 67 68 static enum alias 69 scheme_parse_alias(const char *name) 70 { 71 u_int idx; 72 73 idx = 0; 74 while (scheme_alias[idx].name != NULL) { 75 if (strcasecmp(scheme_alias[idx].name, name) == 0) 76 return (scheme_alias[idx].alias); 77 idx++; 78 } 79 return (ALIAS_NONE); 80 } 81 82 struct mkimg_scheme * 83 scheme_iterate(struct mkimg_scheme *s) 84 { 85 86 return ((s == NULL) ? first : s->next); 87 } 88 89 void 90 scheme_register(struct mkimg_scheme *s) 91 { 92 s->next = first; 93 first = s; 94 } 95 96 int 97 scheme_select(const char *spec) 98 { 99 struct mkimg_scheme *s; 100 101 s = NULL; 102 while ((s = scheme_iterate(s)) != NULL) { 103 if (strcasecmp(spec, s->name) == 0) { 104 scheme = s; 105 return (0); 106 } 107 } 108 return (EINVAL); 109 } 110 111 struct mkimg_scheme * 112 scheme_selected(void) 113 { 114 115 return (scheme); 116 } 117 118 int 119 scheme_bootcode(int fd) 120 { 121 struct stat sb; 122 123 if (scheme == NULL || scheme->bootcode == 0) 124 return (ENXIO); 125 126 if (fstat(fd, &sb) == -1) 127 return (errno); 128 if (sb.st_size > scheme->bootcode) 129 return (EFBIG); 130 131 bootcode = malloc(scheme->bootcode); 132 if (bootcode == NULL) 133 return (ENOMEM); 134 memset(bootcode, 0, scheme->bootcode); 135 if (read(fd, bootcode, sb.st_size) != sb.st_size) { 136 free(bootcode); 137 bootcode = NULL; 138 return (errno); 139 } 140 return (0); 141 } 142 143 int 144 scheme_check_part(struct part *p) 145 { 146 struct mkimg_alias *iter; 147 enum alias alias; 148 149 assert(scheme != NULL); 150 151 /* Check the partition type alias */ 152 alias = scheme_parse_alias(p->alias); 153 if (alias == ALIAS_NONE) 154 return (EINVAL); 155 156 iter = scheme->aliases; 157 while (iter->alias != ALIAS_NONE) { 158 if (alias == iter->alias) 159 break; 160 iter++; 161 } 162 if (iter->alias == ALIAS_NONE) 163 return (EINVAL); 164 p->type = iter->type; 165 166 /* Validate the optional label. */ 167 if (p->label != NULL) { 168 if (strlen(p->label) > scheme->labellen) 169 return (EINVAL); 170 } 171 172 return (0); 173 } 174 175 u_int 176 scheme_max_parts(void) 177 { 178 179 return ((scheme == NULL) ? 0 : scheme->nparts); 180 } 181 182 u_int 183 scheme_max_secsz(void) 184 { 185 186 return ((scheme == NULL) ? INT_MAX+1U : scheme->maxsecsz); 187 } 188 189 lba_t 190 scheme_metadata(u_int where, lba_t start) 191 { 192 193 return ((scheme == NULL) ? start : scheme->metadata(where, start)); 194 } 195 196 int 197 scheme_write(lba_t end) 198 { 199 200 return ((scheme == NULL) ? 0 : scheme->write(end, bootcode)); 201 } 202