vmdk.c revision 266124
1265625Smarcel/*- 2265625Smarcel * Copyright (c) 2014 Juniper Networks, Inc. 3265625Smarcel * All rights reserved. 4265625Smarcel * 5265625Smarcel * Redistribution and use in source and binary forms, with or without 6265625Smarcel * modification, are permitted provided that the following conditions 7265625Smarcel * are met: 8265625Smarcel * 1. Redistributions of source code must retain the above copyright 9265625Smarcel * notice, this list of conditions and the following disclaimer. 10265625Smarcel * 2. Redistributions in binary form must reproduce the above copyright 11265625Smarcel * notice, this list of conditions and the following disclaimer in the 12265625Smarcel * documentation and/or other materials provided with the distribution. 13265625Smarcel * 14265625Smarcel * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15265625Smarcel * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16265625Smarcel * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17265625Smarcel * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18265625Smarcel * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19265625Smarcel * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20265625Smarcel * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21265625Smarcel * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22265625Smarcel * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23265625Smarcel * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24265625Smarcel * SUCH DAMAGE. 25265625Smarcel */ 26265625Smarcel 27265625Smarcel#include <sys/cdefs.h> 28265625Smarcel__FBSDID("$FreeBSD: user/marcel/mkimg/vmdk.c 266124 2014-05-15 14:01:34Z marcel $"); 29265625Smarcel 30265625Smarcel#include <sys/types.h> 31265625Smarcel#include <sys/apm.h> 32265625Smarcel#include <sys/endian.h> 33265625Smarcel#include <sys/errno.h> 34265725Smarcel#include <stdint.h> 35265725Smarcel#include <stdio.h> 36265625Smarcel#include <stdlib.h> 37265625Smarcel#include <string.h> 38265625Smarcel#include <unistd.h> 39265625Smarcel 40266039Smarcel#include "image.h" 41265625Smarcel#include "format.h" 42265625Smarcel#include "mkimg.h" 43265625Smarcel 44266112Smarcel#define VMDK_IMAGE_ROUND 1048576 45266099Smarcel#define VMDK_MIN_GRAIN_SIZE 8192 46266099Smarcel#define VMDK_SECTOR_SIZE 512 47266099Smarcel 48265684Smarcelstruct vmdk_header { 49265684Smarcel uint32_t magic; 50265684Smarcel#define VMDK_MAGIC 0x564d444b 51265684Smarcel uint32_t version; 52265684Smarcel#define VMDK_VERSION 1 53265684Smarcel uint32_t flags; 54265684Smarcel#define VMDK_FLAGS_NL_TEST (1 << 0) 55265684Smarcel#define VMDK_FLAGS_RGT_USED (1 << 1) 56265684Smarcel#define VMDK_FLAGS_COMPRESSED (1 << 16) 57265684Smarcel#define VMDK_FLAGS_MARKERS (1 << 17) 58265684Smarcel uint64_t capacity; 59265684Smarcel uint64_t grain_size; 60265684Smarcel uint64_t desc_offset; 61265684Smarcel uint64_t desc_size; 62265684Smarcel uint32_t ngtes; 63265684Smarcel#define VMDK_NGTES 512 64265684Smarcel uint64_t rgd_offset; 65265684Smarcel uint64_t gd_offset; 66265684Smarcel uint64_t overhead; 67265684Smarcel uint8_t unclean; 68266099Smarcel uint32_t nl_test; 69265684Smarcel#define VMDK_NL_TEST 0x0a200d0a 70265684Smarcel uint16_t compress; 71265684Smarcel#define VMDK_COMPRESS_NONE 0 72265684Smarcel#define VMDK_COMPRESS_DEFLATE 1 73265684Smarcel char padding[433]; 74265684Smarcel} __attribute__((__packed__)); 75265684Smarcel 76265725Smarcelstatic const char desc_fmt[] = 77265725Smarcel "# Disk DescriptorFile\n" 78265725Smarcel "version=%d\n" 79265725Smarcel "CID=%08x\n" 80265725Smarcel "parentCID=ffffffff\n" 81265725Smarcel "createType=\"monolithicSparse\"\n" 82265725Smarcel "# Extent description\n" 83265725Smarcel "RW %ju SPARSE \"%s\"\n" 84265725Smarcel "# The Disk Data Base\n" 85265725Smarcel "#DDB\n" 86265725Smarcel "ddb.adapterType = \"ide\"\n" 87265725Smarcel "ddb.geometry.cylinders = \"%u\"\n" 88265725Smarcel "ddb.geometry.heads = \"%u\"\n" 89265725Smarcel "ddb.geometry.sectors = \"%u\"\n"; 90265725Smarcel 91266099Smarcelstatic uint64_t grainsz; 92266099Smarcel 93265625Smarcelstatic int 94266099Smarcelvmdk_resize(lba_t imgsz) 95266039Smarcel{ 96266099Smarcel uint64_t imagesz; 97266039Smarcel 98266099Smarcel imagesz = imgsz * secsz; 99266112Smarcel imagesz = (imagesz + VMDK_IMAGE_ROUND - 1) & ~(VMDK_IMAGE_ROUND - 1); 100266099Smarcel grainsz = (blksz < VMDK_MIN_GRAIN_SIZE) ? VMDK_MIN_GRAIN_SIZE : blksz; 101266099Smarcel 102266099Smarcel if (verbose) 103266099Smarcel fprintf(stderr, "VMDK: image size = %ju, grain size = %ju\n", 104266099Smarcel (uintmax_t)imagesz, (uintmax_t)grainsz); 105266099Smarcel 106266099Smarcel grainsz /= VMDK_SECTOR_SIZE; 107266099Smarcel return (image_set_size(imagesz / secsz)); 108266039Smarcel} 109266039Smarcel 110266039Smarcelstatic int 111266099Smarcelvmdk_write(int fd) 112265625Smarcel{ 113266099Smarcel struct vmdk_header hdr; 114266099Smarcel uint32_t *gt, *gd; 115265725Smarcel char *desc; 116266099Smarcel uint64_t imagesz; 117266099Smarcel size_t gdsz, gtsz; 118266099Smarcel uint32_t sec; 119266124Smarcel int error, desc_len, n, ngrains, ngts; 120265625Smarcel 121266099Smarcel imagesz = (image_get_size() * secsz) / VMDK_SECTOR_SIZE; 122266099Smarcel 123266099Smarcel memset(&hdr, 0, sizeof(hdr)); 124266099Smarcel le32enc(&hdr.magic, VMDK_MAGIC); 125266099Smarcel le32enc(&hdr.version, VMDK_VERSION); 126266099Smarcel le32enc(&hdr.flags, VMDK_FLAGS_NL_TEST | VMDK_FLAGS_RGT_USED); 127266099Smarcel le64enc(&hdr.capacity, imagesz); 128266099Smarcel le64enc(&hdr.grain_size, grainsz); 129266099Smarcel 130266099Smarcel n = asprintf(&desc, desc_fmt, 1 /*version*/, 0 /*CID*/, 131266099Smarcel (uintmax_t)imagesz /*size*/, "" /*name*/, 132265725Smarcel ncyls /*cylinders*/, nheads /*heads*/, nsecs /*sectors*/); 133266124Smarcel if (n == -1) 134266124Smarcel return (ENOMEM); 135266124Smarcel 136266099Smarcel desc_len = (n + VMDK_SECTOR_SIZE - 1) & ~(VMDK_SECTOR_SIZE - 1); 137265725Smarcel desc = realloc(desc, desc_len); 138266099Smarcel memset(desc + n, 0, desc_len - n); 139265725Smarcel 140266099Smarcel le64enc(&hdr.desc_offset, 1); 141266099Smarcel le64enc(&hdr.desc_size, desc_len / VMDK_SECTOR_SIZE); 142266099Smarcel le32enc(&hdr.ngtes, VMDK_NGTES); 143266099Smarcel 144266099Smarcel sec = desc_len / VMDK_SECTOR_SIZE + 1; 145266099Smarcel le64enc(&hdr.rgd_offset, sec); 146266099Smarcel le64enc(&hdr.gd_offset, sec); 147266099Smarcel 148266099Smarcel ngrains = imagesz / grainsz; 149266099Smarcel ngts = (ngrains + VMDK_NGTES - 1) / VMDK_NGTES; 150266099Smarcel gdsz = (ngts * sizeof(uint32_t) + VMDK_SECTOR_SIZE - 1) & 151266099Smarcel ~(VMDK_SECTOR_SIZE - 1); 152266124Smarcel gd = calloc(gdsz, 1); 153266124Smarcel if (gd == NULL) { 154266124Smarcel free(desc); 155266124Smarcel return (ENOMEM); 156266124Smarcel } 157266099Smarcel 158266099Smarcel sec += gdsz / VMDK_SECTOR_SIZE; 159266099Smarcel for (n = 0; n < ngts; n++) { 160266099Smarcel le32enc(gd + n, sec); 161266099Smarcel sec += VMDK_NGTES * sizeof(uint32_t) / VMDK_SECTOR_SIZE; 162266099Smarcel } 163266099Smarcel 164266099Smarcel sec = (sec + grainsz - 1) & ~(grainsz - 1); 165266099Smarcel 166266099Smarcel if (verbose) 167266099Smarcel fprintf(stderr, "VMDK: overhead = %ju\n", 168266099Smarcel (uintmax_t)(sec * VMDK_SECTOR_SIZE)); 169266099Smarcel 170266099Smarcel le64enc(&hdr.overhead, sec); 171266099Smarcel be32enc(&hdr.nl_test, VMDK_NL_TEST); 172266099Smarcel 173266099Smarcel gtsz = ngts * VMDK_NGTES * sizeof(uint32_t); 174266124Smarcel gt = calloc(gtsz, 1); 175266124Smarcel if (gt == NULL) { 176266124Smarcel free(gd); 177266124Smarcel free(desc); 178266124Smarcel return (ENOMEM); 179266124Smarcel } 180266099Smarcel 181266099Smarcel for (n = 0; n < ngrains; n++) 182266099Smarcel le32enc(gt + n, sec + n * grainsz); 183266099Smarcel 184266099Smarcel write(fd, &hdr, VMDK_SECTOR_SIZE); 185266099Smarcel write(fd, desc, desc_len); 186266099Smarcel write(fd, gd, gdsz); 187266099Smarcel write(fd, gt, gtsz); 188266099Smarcel lseek(fd, sec * VMDK_SECTOR_SIZE, SEEK_SET); 189266124Smarcel error = image_copyout(fd); 190266124Smarcel 191266124Smarcel free(gt); 192266124Smarcel free(gd); 193266124Smarcel free(desc); 194266124Smarcel 195266124Smarcel return (error); 196265625Smarcel} 197265625Smarcel 198265625Smarcelstatic struct mkimg_format vmdk_format = { 199265625Smarcel .name = "vmdk", 200265625Smarcel .description = "Virtual Machine Disk", 201266039Smarcel .resize = vmdk_resize, 202265625Smarcel .write = vmdk_write, 203265625Smarcel}; 204265625Smarcel 205265625SmarcelFORMAT_DEFINE(vmdk_format); 206