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 { "fat32", ALIAS_FAT32 }, 54 { "freebsd", ALIAS_FREEBSD }, 55 { "freebsd-boot", ALIAS_FREEBSD_BOOT }, 56 { "freebsd-nandfs", ALIAS_FREEBSD_NANDFS }, 57 { "freebsd-swap", ALIAS_FREEBSD_SWAP }, 58 { "freebsd-ufs", ALIAS_FREEBSD_UFS }, 59 { "freebsd-vinum", ALIAS_FREEBSD_VINUM }, 60 { "freebsd-zfs", ALIAS_FREEBSD_ZFS }, 61 { "mbr", ALIAS_MBR }, 62 { NULL, ALIAS_NONE } /* Keep last! */ 63 }; 64 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 int 83 scheme_select(const char *spec) 84 { 85 struct mkimg_scheme *s, **iter; 86 87 SET_FOREACH(iter, schemes) { 88 s = *iter; 89 if (strcasecmp(spec, s->name) == 0) { 90 scheme = s; 91 return (0); 92 } 93 } 94 return (EINVAL); 95 } 96 97 struct mkimg_scheme * 98 scheme_selected(void) 99 { 100 101 return (scheme); 102 } 103 104 int 105 scheme_bootcode(int fd) 106 { 107 struct stat sb; 108 109 if (scheme == NULL || scheme->bootcode == 0) 110 return (ENXIO); 111 112 if (fstat(fd, &sb) == -1) 113 return (errno); 114 if (sb.st_size > scheme->bootcode) 115 return (EFBIG); 116 117 bootcode = malloc(scheme->bootcode); 118 if (bootcode == NULL) 119 return (ENOMEM); 120 memset(bootcode, 0, scheme->bootcode); 121 if (read(fd, bootcode, sb.st_size) != sb.st_size) { 122 free(bootcode); 123 bootcode = NULL; 124 return (errno); 125 } 126 return (0); 127 } 128 129 int 130 scheme_check_part(struct part *p) 131 { 132 struct mkimg_alias *iter; 133 enum alias alias; 134 135 assert(scheme != NULL); 136 137 /* Check the partition type alias */ 138 alias = scheme_parse_alias(p->alias); 139 if (alias == ALIAS_NONE) 140 return (EINVAL); 141 142 iter = scheme->aliases; 143 while (iter->alias != ALIAS_NONE) { 144 if (alias == iter->alias) 145 break; 146 iter++; 147 } 148 if (iter->alias == ALIAS_NONE) 149 return (EINVAL); 150 p->type = iter->type; 151 152 /* Validate the optional label. */ 153 if (p->label != NULL) { 154 if (strlen(p->label) > scheme->labellen) 155 return (EINVAL); 156 } 157 158 return (0); 159 } 160 161 u_int 162 scheme_max_parts(void) 163 { 164 165 return ((scheme == NULL) ? 0 : scheme->nparts); 166 } 167 168 u_int 169 scheme_max_secsz(void) 170 { 171 172 return ((scheme == NULL) ? INT_MAX+1U : scheme->maxsecsz); 173 } 174 175 lba_t 176 scheme_metadata(u_int where, lba_t start) 177 { 178 179 return ((scheme == NULL) ? start : scheme->metadata(where, start)); 180 } 181 182 int 183 scheme_write(lba_t end) 184 { 185 186 return ((scheme == NULL) ? 0 : scheme->write(end, bootcode)); 187 } 188