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