static int
raw_write(int fd)
{
return (image_copyout(fd));
}
static int
vmdk_write(int fd)
{
struct vmdk_header hdr;
uint32_t *gt, *gd;
char *buf, *desc;
off_t cur, lim;
uint64_t imagesz;
size_t gdsz, gtsz;
uint32_t sec;
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;
le64enc(&hdr.rgd_offset, sec);
le64enc(&hdr.gd_offset, sec);
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(gdsz, 1);
if (gd == NULL) {
free(desc);
return (ENOMEM);
}
sec += gdsz / VMDK_SECTOR_SIZE;
for (n = 0; n < ngts; n++) {
le32enc(gd + 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);
gtsz = ngts * VMDK_NGTES * sizeof(uint32_t);
gt = calloc(gtsz, 1);
if (gt == NULL) {
free(gd);
free(desc);
return (ENOMEM);
}
for (n = 0; n < ngrains; n++)
le32enc(gt + n, sec + n * 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;
free(gt);
free(gd);
free(desc);
if (error)
return (error);
cur = VMDK_SECTOR_SIZE + desc_len + gdsz + gtsz;
lim = sec * VMDK_SECTOR_SIZE;
if (cur < lim) {
buf = calloc(VMDK_SECTOR_SIZE, 1);
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)
error = image_copyout(fd);
return (error);
}
