diff options
| -rw-r--r-- | Changelog | 1 | ||||
| -rw-r--r-- | block-vmdk.c | 105 |
2 files changed, 105 insertions, 1 deletions
@@ -3,6 +3,7 @@ version 0.7.1: - read-only Virtual FAT support (Johannes Schindelin) - Windows 2000 install disk full hack (original idea from Vladimir N. Oleynik) + - VMDK disk image creation (Filip Navara) version 0.7.0: diff --git a/block-vmdk.c b/block-vmdk.c index f80bf07b75..3bbd1494fe 100644 --- a/block-vmdk.c +++ b/block-vmdk.c @@ -315,6 +315,109 @@ static int vmdk_write(BlockDriverState *bs, int64_t sector_num, return 0; } +static int vmdk_create(const char *filename, int64_t total_size, + const char *backing_file, int flags) +{ + int fd, i; + VMDK4Header header; + uint32_t tmp, magic, grains, gd_size, gt_size, gt_count; + char *desc_template = + "# Disk DescriptorFile\n" + "version=1\n" + "CID=%x\n" + "parentCID=ffffffff\n" + "createType=\"monolithicSparse\"\n" + "\n" + "# Extent description\n" + "RW %lu SPARSE \"%s\"\n" + "\n" + "# The Disk Data Base \n" + "#DDB\n" + "\n" + "ddb.virtualHWVersion = \"3\"\n" + "ddb.geometry.cylinders = \"%lu\"\n" + "ddb.geometry.heads = \"16\"\n" + "ddb.geometry.sectors = \"63\"\n" + "ddb.adapterType = \"ide\"\n"; + char desc[1024]; + const char *real_filename, *temp_str; + + /* XXX: add support for backing file */ + + fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, + 0644); + if (fd < 0) + return -1; + magic = cpu_to_be32(VMDK4_MAGIC); + memset(&header, 0, sizeof(header)); + header.version = cpu_to_le32(1); + header.flags = cpu_to_le32(3); /* ?? */ + header.capacity = cpu_to_le64(total_size); + header.granularity = cpu_to_le64(128); + header.num_gtes_per_gte = cpu_to_le32(512); + + grains = (total_size + header.granularity - 1) / header.granularity; + gt_size = ((header.num_gtes_per_gte * sizeof(uint32_t)) + 511) >> 9; + gt_count = (grains + header.num_gtes_per_gte - 1) / header.num_gtes_per_gte; + gd_size = (gt_count * sizeof(uint32_t) + 511) >> 9; + + header.desc_offset = 1; + header.desc_size = 20; + header.rgd_offset = header.desc_offset + header.desc_size; + header.gd_offset = header.rgd_offset + gd_size + (gt_size * gt_count); + header.grain_offset = + ((header.gd_offset + gd_size + (gt_size * gt_count) + + header.granularity - 1) / header.granularity) * + header.granularity; + + header.desc_offset = cpu_to_le64(header.desc_offset); + header.desc_size = cpu_to_le64(header.desc_size); + header.rgd_offset = cpu_to_le64(header.rgd_offset); + header.gd_offset = cpu_to_le64(header.gd_offset); + header.grain_offset = cpu_to_le64(header.grain_offset); + + header.check_bytes[0] = 0xa; + header.check_bytes[1] = 0x20; + header.check_bytes[2] = 0xd; + header.check_bytes[3] = 0xa; + + /* write all the data */ + write(fd, &magic, sizeof(magic)); + write(fd, &header, sizeof(header)); + + ftruncate(fd, header.grain_offset << 9); + + /* write grain directory */ + lseek(fd, le64_to_cpu(header.rgd_offset) << 9, SEEK_SET); + for (i = 0, tmp = header.rgd_offset + gd_size; + i < gt_count; i++, tmp += gt_size) + write(fd, &tmp, sizeof(tmp)); + + /* write backup grain directory */ + lseek(fd, le64_to_cpu(header.gd_offset) << 9, SEEK_SET); + for (i = 0, tmp = header.gd_offset + gd_size; + i < gt_count; i++, tmp += gt_size) + write(fd, &tmp, sizeof(tmp)); + + /* compose the descriptor */ + real_filename = filename; + if ((temp_str = strrchr(real_filename, '\\')) != NULL) + real_filename = temp_str + 1; + if ((temp_str = strrchr(real_filename, '/')) != NULL) + real_filename = temp_str + 1; + if ((temp_str = strrchr(real_filename, ':')) != NULL) + real_filename = temp_str + 1; + sprintf(desc, desc_template, time(NULL), (unsigned long)total_size, + real_filename, total_size / (63 * 16)); + + /* write the descriptor */ + lseek(fd, le64_to_cpu(header.desc_offset) << 9, SEEK_SET); + write(fd, desc, strlen(desc)); + + close(fd); + return 0; +} + static void vmdk_close(BlockDriverState *bs) { BDRVVmdkState *s = bs->opaque; @@ -331,6 +434,6 @@ BlockDriver bdrv_vmdk = { vmdk_read, vmdk_write, vmdk_close, - NULL, /* no create yet */ + vmdk_create, vmdk_is_allocated, }; |