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