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