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 #include <sys/stat.h> 29 #include <assert.h> 30 #include <errno.h> 31 #include <limits.h> 32 #include <stdlib.h> 33 #include <string.h> 34 #include <unistd.h> 35 36 #include "image.h" 37 #include "mkimg.h" 38 #include "scheme.h" 39 40 static struct { 41 const char *name; 42 enum alias alias; 43 } scheme_alias[] = { 44 { "ebr", ALIAS_EBR }, 45 { "efi", ALIAS_EFI }, 46 { "fat16b", ALIAS_FAT16B }, 47 { "fat32", ALIAS_FAT32 }, 48 { "fat32lba", ALIAS_FAT32LBA }, 49 { "freebsd", ALIAS_FREEBSD }, 50 { "freebsd-boot", ALIAS_FREEBSD_BOOT }, 51 { "freebsd-nandfs", ALIAS_FREEBSD_NANDFS }, 52 { "freebsd-swap", ALIAS_FREEBSD_SWAP }, 53 { "freebsd-ufs", ALIAS_FREEBSD_UFS }, 54 { "freebsd-vinum", ALIAS_FREEBSD_VINUM }, 55 { "freebsd-zfs", ALIAS_FREEBSD_ZFS }, 56 { "mbr", ALIAS_MBR }, 57 { "ntfs", ALIAS_NTFS }, 58 { "prepboot", ALIAS_PPCBOOT }, 59 { NULL, ALIAS_NONE } /* Keep last! */ 60 }; 61 62 static struct mkimg_scheme *first; 63 static struct mkimg_scheme *scheme; 64 static void *bootcode; 65 66 static enum alias 67 scheme_parse_alias(const char *name) 68 { 69 u_int idx; 70 71 idx = 0; 72 while (scheme_alias[idx].name != NULL) { 73 if (strcasecmp(scheme_alias[idx].name, name) == 0) 74 return (scheme_alias[idx].alias); 75 idx++; 76 } 77 return (ALIAS_NONE); 78 } 79 80 struct mkimg_scheme * 81 scheme_iterate(struct mkimg_scheme *s) 82 { 83 84 return ((s == NULL) ? first : s->next); 85 } 86 87 void 88 scheme_register(struct mkimg_scheme *s) 89 { 90 s->next = first; 91 first = s; 92 } 93 94 int 95 scheme_select(const char *spec) 96 { 97 struct mkimg_scheme *s; 98 99 s = NULL; 100 while ((s = scheme_iterate(s)) != NULL) { 101 if (strcasecmp(spec, s->name) == 0) { 102 scheme = s; 103 return (0); 104 } 105 } 106 return (EINVAL); 107 } 108 109 struct mkimg_scheme * 110 scheme_selected(void) 111 { 112 113 return (scheme); 114 } 115 116 int 117 scheme_bootcode(int fd) 118 { 119 struct stat sb; 120 121 if (scheme == NULL || scheme->bootcode == 0) 122 return (ENXIO); 123 124 if (fstat(fd, &sb) == -1) 125 return (errno); 126 if (sb.st_size > scheme->bootcode) 127 return (EFBIG); 128 129 bootcode = malloc(scheme->bootcode); 130 if (bootcode == NULL) 131 return (ENOMEM); 132 memset(bootcode, 0, scheme->bootcode); 133 if (read(fd, bootcode, sb.st_size) != sb.st_size) { 134 free(bootcode); 135 bootcode = NULL; 136 return (errno); 137 } 138 return (0); 139 } 140 141 int 142 scheme_check_part(struct part *p) 143 { 144 struct mkimg_alias *iter; 145 enum alias alias; 146 147 assert(scheme != NULL); 148 149 /* Check the partition type alias */ 150 alias = scheme_parse_alias(p->alias); 151 if (alias == ALIAS_NONE) 152 return (EINVAL); 153 154 iter = scheme->aliases; 155 while (iter->alias != ALIAS_NONE) { 156 if (alias == iter->alias) 157 break; 158 iter++; 159 } 160 if (iter->alias == ALIAS_NONE) 161 return (EINVAL); 162 p->type = iter->type; 163 164 /* Validate the optional label. */ 165 if (p->label != NULL) { 166 if (strlen(p->label) > scheme->labellen) 167 return (EINVAL); 168 } 169 170 return (0); 171 } 172 173 u_int 174 scheme_max_parts(void) 175 { 176 177 return ((scheme == NULL) ? 0 : scheme->nparts); 178 } 179 180 u_int 181 scheme_max_secsz(void) 182 { 183 184 return ((scheme == NULL) ? INT_MAX+1U : scheme->maxsecsz); 185 } 186 187 lba_t 188 scheme_metadata(u_int where, lba_t start) 189 { 190 191 return ((scheme == NULL) ? start : scheme->metadata(where, start)); 192 } 193 194 int 195 scheme_write(lba_t end) 196 { 197 198 return ((scheme == NULL) ? 0 : scheme->write(end, bootcode)); 199 } 200