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