/*-
* Copyright (c) 2014 Juniper Networks, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#include <sys/errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "endian.h"
#include "image.h"
#include "format.h"
#include "mkimg.h"
#define VMDK_IMAGE_ROUND 1048576
#define VMDK_MIN_GRAIN_SIZE 8192
#define VMDK_SECTOR_SIZE 512
struct vmdk_header {
uint32_t magic;
#define VMDK_MAGIC 0x564d444b
uint32_t version;
#define VMDK_VERSION 1
uint32_t flags;
#define VMDK_FLAGS_NL_TEST (1 << 0)
#define VMDK_FLAGS_RGT_USED (1 << 1)
#define VMDK_FLAGS_COMPRESSED (1 << 16)
#define VMDK_FLAGS_MARKERS (1 << 17)
uint64_t capacity;
uint64_t grain_size;
uint64_t desc_offset;
uint64_t desc_size;
uint32_t ngtes;
#define VMDK_NGTES 512
uint64_t rgd_offset;
uint64_t gd_offset;
uint64_t overhead;
uint8_t unclean;
uint32_t nl_test;
#define VMDK_NL_TEST 0x0a200d0a
uint16_t compress;
#define VMDK_COMPRESS_NONE 0
#define VMDK_COMPRESS_DEFLATE 1
char padding[433];
} __attribute__((__packed__));
static const char desc_fmt[] =
"# Disk DescriptorFile\n"
"version=%d\n"
"CID=%08x\n"
"parentCID=ffffffff\n"
"createType=\"monolithicSparse\"\n"
"# Extent description\n"
"RW %ju SPARSE \"%s\"\n"
"# The Disk Data Base\n"
"#DDB\n"
"ddb.adapterType = \"ide\"\n"
"ddb.geometry.cylinders = \"%u\"\n"
"ddb.geometry.heads = \"%u\"\n"
"ddb.geometry.sectors = \"%u\"\n";
static uint64_t grainsz;
static int
vmdk_resize(lba_t imgsz)
{
uint64_t imagesz;
imagesz = imgsz * secsz;
imagesz = (imagesz + VMDK_IMAGE_ROUND - 1) & ~(VMDK_IMAGE_ROUND - 1);
grainsz = (blksz < VMDK_MIN_GRAIN_SIZE) ? VMDK_MIN_GRAIN_SIZE : blksz;
if (verbose)
fprintf(stderr, "VMDK: image size = %ju, grain size = %ju\n",
(uintmax_t)imagesz, (uintmax_t)grainsz);
grainsz /= VMDK_SECTOR_SIZE;
return (image_set_size(imagesz / secsz));
}
static int
vmdk_write(int fd)
{
struct vmdk_header hdr;
uint32_t *gt, *gd, *rgd;
char *buf, *desc;
off_t cur, lim;
uint64_t imagesz;
lba_t blkofs, blkcnt;
size_t gdsz, gtsz;
uint32_t sec, cursec;
int error, desc_len, n, ngrains, ngts;
imagesz = (image_get_size() * secsz) / VMDK_SECTOR_SIZE;
memset(&hdr, 0, sizeof(hdr));
le32enc(&hdr.magic, VMDK_MAGIC);
le32enc(&hdr.version, VMDK_VERSION);
le32enc(&hdr.flags, VMDK_FLAGS_NL_TEST | VMDK_FLAGS_RGT_USED);
le64enc(&hdr.capacity, imagesz);
le64enc(&hdr.grain_size, grainsz);
n = asprintf(&desc, desc_fmt, 1 /*version*/, 0 /*CID*/,
(uintmax_t)imagesz /*size*/, "" /*name*/,
ncyls /*cylinders*/, nheads /*heads*/, nsecs /*sectors*/);
if (n == -1)
return (ENOMEM);
desc_len = (n + VMDK_SECTOR_SIZE - 1) & ~(VMDK_SECTOR_SIZE - 1);
desc = realloc(desc, desc_len);
memset(desc + n, 0, desc_len - n);
le64enc(&hdr.desc_offset, 1);
le64enc(&hdr.desc_size, desc_len / VMDK_SECTOR_SIZE);
le32enc(&hdr.ngtes, VMDK_NGTES);
sec = desc_len / VMDK_SECTOR_SIZE + 1;
ngrains = imagesz / grainsz;
ngts = (ngrains + VMDK_NGTES - 1) / VMDK_NGTES;
gdsz = (ngts * sizeof(uint32_t) + VMDK_SECTOR_SIZE - 1) &
~(VMDK_SECTOR_SIZE - 1);
gd = calloc(1, gdsz);
if (gd == NULL) {
free(desc);
return (ENOMEM);
}
le64enc(&hdr.gd_offset, sec);
sec += gdsz / VMDK_SECTOR_SIZE;
for (n = 0; n < ngts; n++) {
le32enc(gd + n, sec);
sec += VMDK_NGTES * sizeof(uint32_t) / VMDK_SECTOR_SIZE;
}
rgd = calloc(1, gdsz);
if (rgd == NULL) {
free(gd);
free(desc);
return (ENOMEM);
}
le64enc(&hdr.rgd_offset, sec);
sec += gdsz / VMDK_SECTOR_SIZE;
for (n = 0; n < ngts; n++) {
le32enc(rgd + n, sec);
sec += VMDK_NGTES * sizeof(uint32_t) / VMDK_SECTOR_SIZE;
}
sec = (sec + grainsz - 1) & ~(grainsz - 1);
if (verbose)
fprintf(stderr, "VMDK: overhead = %ju\n",
(uintmax_t)(sec * VMDK_SECTOR_SIZE));
le64enc(&hdr.overhead, sec);
be32enc(&hdr.nl_test, VMDK_NL_TEST);
gt = calloc(ngts, VMDK_NGTES * sizeof(uint32_t));
if (gt == NULL) {
free(rgd);
free(gd);
free(desc);
return (ENOMEM);
}
gtsz = ngts * VMDK_NGTES * sizeof(uint32_t);
cursec = sec;
blkcnt = (grainsz * VMDK_SECTOR_SIZE) / secsz;
for (n = 0; n < ngrains; n++) {
blkofs = n * blkcnt;
if (image_data(blkofs, blkcnt)) {
le32enc(gt + n, cursec);
cursec += grainsz;
}
}
error = 0;
if (!error && sparse_write(fd, &hdr, VMDK_SECTOR_SIZE) < 0)
error = errno;
if (!error && sparse_write(fd, desc, desc_len) < 0)
error = errno;
if (!error && sparse_write(fd, gd, gdsz) < 0)
error = errno;
if (!error && sparse_write(fd, gt, gtsz) < 0)
error = errno;
if (!error && sparse_write(fd, rgd, gdsz) < 0)
error = errno;
if (!error && sparse_write(fd, gt, gtsz) < 0)
error = errno;
free(gt);
free(rgd);
free(gd);
free(desc);
if (error)
return (error);
cur = VMDK_SECTOR_SIZE + desc_len + (gdsz + gtsz) * 2;
lim = sec * VMDK_SECTOR_SIZE;
if (cur < lim) {
buf = calloc(1, VMDK_SECTOR_SIZE);
if (buf == NULL)
error = ENOMEM;
while (!error && cur < lim) {
if (sparse_write(fd, buf, VMDK_SECTOR_SIZE) < 0)
error = errno;
cur += VMDK_SECTOR_SIZE;
}
if (buf != NULL)
free(buf);
}
if (error)
return (error);
blkcnt = (grainsz * VMDK_SECTOR_SIZE) / secsz;
for (n = 0; n < ngrains; n++) {
blkofs = n * blkcnt;
if (image_data(blkofs, blkcnt)) {
error = image_copyout_region(fd, blkofs, blkcnt);
if (error)
return (error);
}
}
return (image_copyout_done(fd));
}
static struct mkimg_format vmdk_format = {
.name = "vmdk",
.description = "Virtual Machine Disk",
.resize = vmdk_resize,
.write = vmdk_write,
};
FORMAT_DEFINE(vmdk_format);
