gwj / at91sam9263 · Commits

Commit 47cea614a15371f50df11964e5642a427fed0c5b

Authored by bellard
1 parent aedf5382

vmdk2raw: convert VMware disk images to raw images 


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@813 c046a42c-6fe2-441c-8c8c-71466251a162
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Showing 3 changed files with 239 additions and 2 deletions
Makefile
  View file @47cea61
... ... @@ -8,7 +8,7 @@ LDFLAGS=-g
8 8 LIBS=
9 9 DEFINES+=-D_GNU_SOURCE
10 10 ifndef CONFIG_WIN32
11   -TOOLS=qemu-mkcow
  11 +TOOLS=qemu-mkcow vmdk2raw
12 12 endif
13 13 ifdef CONFIG_STATIC
14 14 LDFLAGS+=-static
... ... @@ -22,6 +22,9 @@ all: dyngen$(EXESUF) $(TOOLS) qemu-doc.html qemu-tech.html qemu.1
22 22 qemu-mkcow: qemu-mkcow.c
23 23 $(CC) $(CFLAGS) $(LDFLAGS) $(DEFINES) -o $@ $^ $(LIBS)
24 24  
  25 +vmdk2raw: vmdk2raw.c
  26 + $(CC) $(CFLAGS) $(LDFLAGS) $(DEFINES) -o $@ $^ $(LIBS)
  27 +
25 28 dyngen$(EXESUF): dyngen.c
26 29 $(HOST_CC) $(CFLAGS) $(DEFINES) -o $@ $^
27 30  
... ... @@ -91,7 +94,7 @@ tarbin:
91 94 $(bindir)/qemu-arm \
92 95 $(bindir)/qemu-sparc \
93 96 $(bindir)/qemu-ppc \
94   - $(bindir)/qemu-mkcow \
  97 + $(bindir)/qemu-mkcow $(bindir)/vmdk2raw \
95 98 $(datadir)/bios.bin \
96 99 $(datadir)/vgabios.bin \
97 100 $(datadir)/linux_boot.bin \
... ...
vmdk.h 0 → 100644
  View file @47cea61
  1 +/*
  2 + Copyright (C) Matthew Chapman 2003
  3 +
  4 + This program is free software; you can redistribute it and/or modify
  5 + it under the terms of the GNU General Public License as published by
  6 + the Free Software Foundation; either version 2 of the License, or
  7 + (at your option) any later version.
  8 +
  9 + This program is distributed in the hope that it will be useful,
  10 + but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12 + GNU General Public License for more details.
  13 +
  14 + You should have received a copy of the GNU General Public License
  15 + along with this program; if not, write to the Free Software
  16 + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17 +*/
  18 +
  19 +#define SECTOR_BITS 9
  20 +#define SECTOR_SIZE (1 << SECTOR_BITS)
  21 +#define SECTOR_MASK (SECTOR_SIZE - 1)
  22 +
  23 +#define L1_BITS (SECTOR_BITS - 3)
  24 +#define L1_SIZE (1 << L1_BITS)
  25 +#define L1_MASK (L1_SIZE - 1)
  26 +
  27 +#define L2_BITS SECTOR_BITS
  28 +#define L2_SIZE (1 << L2_BITS)
  29 +#define L2_MASK (L2_SIZE - 1)
  30 +
  31 +#define MIN(x,y) (((x) < (y)) ? (x) : (y))
  32 +
  33 +struct cowdisk_header
  34 +{
  35 + char magic[4]; /* COWD */
  36 + uint32_t version;
  37 + uint32_t flags;
  38 + uint32_t disk_sectors;
  39 + uint32_t granularity;
  40 + uint32_t l1dir_sector;
  41 + uint32_t l1dir_size;
  42 + uint32_t file_sectors;
  43 + uint32_t cylinders;
  44 + uint32_t heads;
  45 + uint32_t sectors_per_track;
  46 +};
  47 +
  48 +struct cowdisk_header2
  49 +{
  50 + uint32_t parent_ts;
  51 + uint32_t timestamp;
  52 +};
... ...
vmdk2raw.c 0 → 100644
  View file @47cea61
  1 +/*
  2 + vmdk2raw: convert vmware images to raw disk images
  3 + Copyright (C) Net Integration Technologies 2004
  4 + Copyright (C) Matthew Chapman 2003
  5 +
  6 + This program is free software; you can redistribute it and/or modify
  7 + it under the terms of the GNU General Public License as published by
  8 + the Free Software Foundation; either version 2 of the License, or
  9 + (at your option) any later version.
  10 +
  11 + This program is distributed in the hope that it will be useful,
  12 + but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14 + GNU General Public License for more details.
  15 +
  16 + You should have received a copy of the GNU General Public License
  17 + along with this program; if not, write to the Free Software
  18 + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 +*/
  20 +
  21 +#include <stdlib.h>
  22 +#include <stdio.h>
  23 +#include <unistd.h>
  24 +#include <fcntl.h>
  25 +#include <inttypes.h>
  26 +#include <sys/types.h>
  27 +#include <string.h>
  28 +#include <sys/stat.h>
  29 +#include <errno.h>
  30 +#include "vmdk.h"
  31 +#include "config-host.h"
  32 +
  33 +struct cowdisk_header header;
  34 +struct cowdisk_header2 header2;
  35 +off_t disk_base, disk_limit;
  36 +unsigned int granule_size;
  37 +uint32_t l1dir[L1_SIZE];
  38 +
  39 +unsigned int cached_l2dir;
  40 +uint32_t l2dir[L2_SIZE];
  41 +
  42 +size_t read_physical(int fd, off64_t offset, size_t length, void *buffer)
  43 +{
  44 + size_t n;
  45 +
  46 + if (lseek64(fd, offset, SEEK_SET) == -1)
  47 + {
  48 + perror("lseek");
  49 + return -1;
  50 + }
  51 +
  52 + n = read(fd, buffer, length);
  53 + if (n == -1)
  54 + {
  55 + perror("read from disk");
  56 + return -1;
  57 + }
  58 +
  59 + return n;
  60 +}
  61 +
  62 +size_t copy_virtual(int in_fd, int out_fd, off64_t offset, void *buffer, size_t length)
  63 +{
  64 + unsigned int granule_index, granule_offset;
  65 + unsigned int l1index, l2index;
  66 +
  67 + granule_index = offset / granule_size;
  68 + granule_offset = offset % granule_size;
  69 + length = MIN(length, granule_size - granule_offset);
  70 + length = MIN(length, disk_limit - offset);
  71 +
  72 + l1index = (granule_index >> L2_BITS) & L1_MASK;
  73 + l2index = granule_index & L2_MASK;
  74 +
  75 + if (l1dir[l1index] == 0)
  76 + goto zero_fill;
  77 +
  78 + if (l1index != cached_l2dir)
  79 + {
  80 + if (read_physical(in_fd, (l1dir[l1index] << SECTOR_BITS), sizeof(l2dir), (char *)l2dir) != sizeof(l2dir))
  81 + return 0;
  82 +
  83 + cached_l2dir = l1index;
  84 + }
  85 +
  86 + if (l2dir[l2index] == 0)
  87 + goto zero_fill;
  88 +
  89 + if (read_physical(in_fd, (l2dir[l2index] << SECTOR_BITS) + granule_offset, length, buffer) != length)
  90 + return 0;
  91 +
  92 + write(out_fd, buffer, length);
  93 + return length;
  94 +
  95 +zero_fill:
  96 + /* the last chunk of the file can not be sparse
  97 + * or the file will be truncated */
  98 + if (offset + length < disk_limit) {
  99 + memset(buffer, 0, length);
  100 + write(out_fd, buffer, length);
  101 + } else {
  102 + if (lseek(out_fd, length, SEEK_CUR) == (off_t)-1)
  103 + perror("lseek");
  104 + }
  105 + return length;
  106 +}
  107 +
  108 +
  109 +int open_vmdk(const char *filename)
  110 +{
  111 + int fd = open(filename, O_RDONLY);
  112 + if (fd == -1)
  113 + {
  114 + perror(filename);
  115 + return -1;
  116 + }
  117 +
  118 + if (read(fd, &header, sizeof(header)) != sizeof(header))
  119 + {
  120 + perror("read from disk");
  121 + return -1;
  122 + }
  123 +
  124 + if (memcmp(header.magic, "COWD", 4) != 0)
  125 + {
  126 + fprintf(stderr, "%s is not a VMware virtual disk image\n", filename);
  127 + return -1;
  128 + }
  129 +
  130 + granule_size = header.granularity << SECTOR_BITS;
  131 + if (read_physical(fd, header.l1dir_sector << SECTOR_BITS, sizeof(l1dir), (char *)l1dir) != sizeof(l1dir))
  132 + return -1;
  133 +
  134 + disk_limit = header.disk_sectors << SECTOR_BITS;
  135 +
  136 + cached_l2dir = -1;
  137 + return fd;
  138 +}
  139 +
  140 +void help(void)
  141 +{
  142 + printf("vmdk2raw\n"
  143 + "usage: vmdk2raw vmware_image output_image\n"
  144 + "\n"
  145 + "vmware_image a vmware 2.x/3.x cow image\n"
  146 + "output_image the created disk image\n"
  147 + );
  148 + exit(1);
  149 +}
  150 +
  151 +#define BUF_SIZE granule_size
  152 +void copy_disk(in_fd, out_fd)
  153 +{
  154 + char buf[BUF_SIZE];
  155 + off64_t i = 0;
  156 + while (i < disk_limit) {
  157 + i += copy_virtual(in_fd, out_fd, i, buf, sizeof(buf));
  158 + }
  159 +}
  160 +
  161 +int main(int argc, char **argv)
  162 +{
  163 + int out_fd, in_fd;
  164 +
  165 + if (argc < 3)
  166 + help();
  167 +
  168 + in_fd = open_vmdk(argv[1]);
  169 + if (in_fd < 0) {
  170 + return -1;
  171 + }
  172 +
  173 + out_fd = open(argv[2], O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
  174 + if (out_fd < 0) {
  175 + perror(argv[2]);
  176 + return -1;
  177 + }
  178 +
  179 + copy_disk(in_fd, out_fd);
  180 + close(out_fd);
  181 + return 0;
  182 +}
... ...