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2a944ecdef
a PMBR. Make sure the create command creates a PMBR as well (if not already present). o When parsing the MBR, explicitly check for a PMBR and create a PMBR map node if one is found. o When parsing the MBR, recurse to handle extended partitions. This allows us to flatten nested MBRs when migrating to a GPT. o Have the migrate command bail out if it encounters a partition it doesn't know how to migrate. This avoids data loss. o Change the output of the show command so that the UUIDs of the GPT partitions fit on the same line. o Show when partitions are extended partitions and add the PMBR type. Approved by: re (blanket)
494 lines
13 KiB
C
494 lines
13 KiB
C
/*
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* Copyright (c) 2002 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* CRC32 code derived from work by Gary S. Brown.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/disk.h>
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#include <sys/stat.h>
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#include <sys/gpt.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <uuid.h>
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#include "map.h"
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#include "gpt.h"
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char device_name[MAXPATHLEN];
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off_t mediasz;
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u_int parts;
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u_int secsz;
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int readonly, verbose;
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static uint32_t crc32_tab[] = {
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0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
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0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
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0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
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0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
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0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
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0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
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0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
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0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
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0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
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0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
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0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
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0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
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0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
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0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
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0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
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0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
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0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
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0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
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0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
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0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
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0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
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0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
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0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
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0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
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0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
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0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
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0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
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0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
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0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
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0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
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0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
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0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
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0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
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0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
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0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
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0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
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0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
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0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
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0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
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0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
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0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
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0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
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0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
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};
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uint32_t
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crc32(const void *buf, size_t size)
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{
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const uint8_t *p;
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uint32_t crc;
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p = buf;
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crc = ~0U;
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while (size--)
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crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
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return crc ^ ~0U;
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}
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void
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unicode16(short *dst, const wchar_t *src, size_t len)
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{
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while (len-- && *src != 0)
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*dst++ = *src++;
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if (len)
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*dst = 0;
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}
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void*
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gpt_read(int fd, off_t lba, size_t count)
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{
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off_t ofs;
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void *buf;
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count *= secsz;
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buf = malloc(count);
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if (buf == NULL)
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return (NULL);
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ofs = lba * secsz;
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if (lseek(fd, ofs, SEEK_SET) == ofs &&
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read(fd, buf, count) == (ssize_t)count)
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return (buf);
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free(buf);
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return (NULL);
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}
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int
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gpt_write(int fd, map_t *map)
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{
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off_t ofs;
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size_t count;
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count = map->map_size * secsz;
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ofs = map->map_start * secsz;
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if (lseek(fd, ofs, SEEK_SET) == ofs &&
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write(fd, map->map_data, count) == (ssize_t)count)
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return (0);
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return (-1);
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}
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static int
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gpt_mbr(int fd, off_t lba)
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{
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struct mbr *mbr;
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map_t *m, *p;
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off_t size, start;
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unsigned int i, pmbr;
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mbr = gpt_read(fd, lba, 1);
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if (mbr == NULL)
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return (-1);
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if (mbr->mbr_sig != MBR_SIG) {
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if (verbose)
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warnx("%s: MBR not found at sector %llu", device_name,
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(long long)lba);
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free(mbr);
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return (0);
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}
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/*
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* Differentiate between a regular MBR and a PMBR. This is more
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* convenient in general. A PMBR is one with a single partition
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* of type 0xee.
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*/
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pmbr = 0;
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for (i = 0; i < 4; i++) {
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if (mbr->mbr_part[i].part_typ == 0)
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continue;
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if (mbr->mbr_part[i].part_typ == 0xee)
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pmbr++;
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else
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break;
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}
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if (pmbr && i == 4 && lba == 0) {
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if (pmbr != 1)
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warnx("%s: Suspicious PMBR at sector %llu",
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device_name, (long long)lba);
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else if (verbose > 1)
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warnx("%s: PMBR at sector %llu", device_name,
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(long long)lba);
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p = map_add(lba, 1LL, MAP_TYPE_PMBR, mbr);
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return ((p == NULL) ? -1 : 0);
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}
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if (pmbr)
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warnx("%s: Suspicious MBR at sector %llu", device_name,
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(long long)lba);
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else if (verbose > 1)
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warnx("%s: MBR at sector %llu", device_name, (long long)lba);
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p = map_add(lba, 1LL, MAP_TYPE_MBR, mbr);
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if (p == NULL)
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return (-1);
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for (i = 0; i < 4; i++) {
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if (mbr->mbr_part[i].part_typ == 0 ||
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mbr->mbr_part[i].part_typ == 0xee)
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continue;
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start = mbr->mbr_part[i].part_start_hi;
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start = (start << 16) + mbr->mbr_part[i].part_start_lo;
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size = mbr->mbr_part[i].part_size_hi;
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size = (size << 16) + mbr->mbr_part[i].part_size_lo;
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if (start == 0 && size == 0) {
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warnx("%s: Malformed MBR at sector %llu", device_name,
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(long long)lba);
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continue;
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}
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/* start is relative to the offset of the MBR itself. */
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start += lba;
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if (verbose > 2)
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warnx("%s: MBR part: type=%d, start=%llu, size=%llu",
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device_name, mbr->mbr_part[i].part_typ,
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(long long)start, (long long)size);
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if (mbr->mbr_part[i].part_typ != 15) {
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m = map_add(start, size, MAP_TYPE_MBR_PART, p);
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if (m == NULL)
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return (-1);
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} else {
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if (gpt_mbr(fd, start) == -1)
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return (-1);
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}
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}
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return (0);
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}
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static int
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gpt_gpt(int fd, off_t lba)
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{
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off_t size;
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struct gpt_ent *ent;
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struct gpt_hdr *hdr;
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char *p, *s;
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map_t *m;
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size_t blocks, tblsz;
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unsigned int i;
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uint32_t crc;
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hdr = gpt_read(fd, lba, 1);
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if (hdr == NULL)
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return (-1);
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if (memcmp(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig)))
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goto fail_hdr;
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crc = hdr->hdr_crc_self;
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hdr->hdr_crc_self = 0;
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if (crc32(hdr, hdr->hdr_size) != crc) {
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if (verbose)
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warnx("%s: Bad CRC in GPT header at sector %llu",
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device_name, (long long)lba);
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goto fail_hdr;
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}
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tblsz = hdr->hdr_entries * hdr->hdr_entsz;
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blocks = tblsz / secsz + ((tblsz % secsz) ? 1 : 0);
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/* Use generic pointer to deal with hdr->hdr_entsz != sizeof(*ent). */
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p = gpt_read(fd, hdr->hdr_lba_table, blocks);
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if (p == NULL)
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return (-1);
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if (crc32(p, tblsz) != hdr->hdr_crc_table) {
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if (verbose)
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warnx("%s: Bad CRC in GPT table at sector %llu",
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device_name, (long long)hdr->hdr_lba_table);
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goto fail_ent;
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}
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if (verbose > 1)
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warnx("%s: %s GPT at sector %llu", device_name,
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(lba == 1) ? "Pri" : "Sec", (long long)lba);
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m = map_add(lba, 1, (lba == 1)
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? MAP_TYPE_PRI_GPT_HDR : MAP_TYPE_SEC_GPT_HDR, hdr);
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if (m == NULL)
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return (-1);
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m = map_add(hdr->hdr_lba_table, blocks, (lba == 1)
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? MAP_TYPE_PRI_GPT_TBL : MAP_TYPE_SEC_GPT_TBL, p);
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if (m == NULL)
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return (-1);
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if (lba != 1)
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return (0);
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for (i = 0; i < hdr->hdr_entries; i++) {
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ent = (void*)(p + i * hdr->hdr_entsz);
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if (uuid_is_nil(&ent->ent_type, NULL))
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continue;
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size = ent->ent_lba_end - ent->ent_lba_start + 1LL;
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if (verbose > 2) {
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uuid_to_string(&ent->ent_type, &s, NULL);
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warnx(
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"%s: GPT partition: type=%s, start=%llu, size=%llu", device_name, s,
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(long long)ent->ent_lba_start, (long long)size);
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free(s);
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}
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m = map_add(ent->ent_lba_start, size, MAP_TYPE_GPT_PART, ent);
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if (m == NULL)
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return (-1);
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}
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return (0);
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fail_ent:
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free(p);
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fail_hdr:
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free(hdr);
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return (0);
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}
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int
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gpt_open(const char *dev)
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{
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struct stat sb;
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int fd;
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if (!stat(dev, &sb)) {
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strlcpy(device_name, dev, sizeof(device_name));
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goto found;
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}
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snprintf(device_name, sizeof(device_name), "/dev/%s", dev);
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if (!stat(device_name, &sb))
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goto found;
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strlcpy(device_name, dev, sizeof(device_name));
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return (-1);
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found:
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fd = open(device_name, (readonly) ? O_RDONLY : O_RDWR|O_EXCL);
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if (fd == -1)
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return (-1);
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if ((sb.st_mode & S_IFMT) != S_IFREG) {
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if (ioctl(fd, DIOCGSECTORSIZE, &secsz) == -1 ||
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ioctl(fd, DIOCGMEDIASIZE, &mediasz) == -1)
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goto close;
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} else {
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secsz = 512; /* Fixed size for files. */
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if (sb.st_size % secsz) {
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errno = EINVAL;
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goto close;
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}
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mediasz = sb.st_size;
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}
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/*
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* We require an absolute minimum of 6 sectors. One for the MBR,
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* 2 for the GPT header, 2 for the GPT table and one to hold some
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* user data. Let's catch this extreme border case here so that
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* we don't have to worry about it later.
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*/
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if (mediasz / secsz < 6) {
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errno = ENODEV;
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goto close;
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}
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if (verbose)
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warnx("%s: mediasize=%llu; sectorsize=%u; blocks=%llu",
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device_name, (long long)mediasz, secsz,
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(long long)(mediasz / secsz));
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map_init(mediasz / secsz);
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if (gpt_mbr(fd, 0LL) == -1)
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goto close;
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if (gpt_gpt(fd, 1LL) == -1)
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goto close;
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if (gpt_gpt(fd, mediasz / secsz - 1LL) == -1)
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goto close;
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return (fd);
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close:
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close(fd);
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return (-1);
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}
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void
|
|
gpt_close(int fd)
|
|
{
|
|
/* XXX post processing? */
|
|
close(fd);
|
|
}
|
|
|
|
static struct {
|
|
int (*fptr)(int, char *[]);
|
|
const char *name;
|
|
} cmdsw[] = {
|
|
{ cmd_add, "add" },
|
|
{ cmd_create, "create" },
|
|
{ NULL, "delete" },
|
|
{ cmd_destroy, "destroy" },
|
|
{ NULL, "help" },
|
|
{ cmd_migrate, "migrate" },
|
|
{ cmd_recover, "recover" },
|
|
{ NULL, "rename" },
|
|
{ cmd_show, "show" },
|
|
{ NULL, "verify" },
|
|
{ NULL, NULL }
|
|
};
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
fprintf(stderr,
|
|
"usage: %s [-rv] [-p nparts] command [options] device\n",
|
|
getprogname());
|
|
exit(1);
|
|
}
|
|
|
|
static void
|
|
prefix(const char *cmd)
|
|
{
|
|
char *pfx;
|
|
const char *prg;
|
|
|
|
prg = getprogname();
|
|
pfx = malloc(strlen(prg) + strlen(cmd) + 2);
|
|
/* Don't bother failing. It's not important */
|
|
if (pfx == NULL)
|
|
return;
|
|
|
|
sprintf(pfx, "%s %s", prg, cmd);
|
|
setprogname(pfx);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
char *cmd, *p;
|
|
int ch, i;
|
|
|
|
/* Get the generic options */
|
|
while ((ch = getopt(argc, argv, "p:rv")) != -1) {
|
|
switch(ch) {
|
|
case 'p':
|
|
if (parts > 0)
|
|
usage();
|
|
parts = strtol(optarg, &p, 10);
|
|
if (*p != 0 || parts < 1)
|
|
usage();
|
|
break;
|
|
case 'r':
|
|
readonly = 1;
|
|
break;
|
|
case 'v':
|
|
verbose++;
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
}
|
|
if (!parts)
|
|
parts = 128;
|
|
|
|
if (argc == optind)
|
|
usage();
|
|
|
|
cmd = argv[optind++];
|
|
for (i = 0; cmdsw[i].name != NULL && strcmp(cmd, cmdsw[i].name); i++);
|
|
|
|
if (cmdsw[i].fptr == NULL)
|
|
errx(1, "unknown command: %s", cmd);
|
|
|
|
prefix(cmd);
|
|
return ((*cmdsw[i].fptr)(argc, argv));
|
|
}
|