Signed-off-by: Dong Xu Wang <wdon...@linux.vnet.ibm.com>
---
block/vmdk.c | 236 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 236 insertions(+)
diff --git a/block/vmdk.c b/block/vmdk.c
index 346bb5c..5452aa2 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -1720,6 +1720,197 @@ exit:
return ret;
}
+static int vmdk_create_new(const char *filename, QemuOpts *opts)
+{
+ int fd, idx = 0;
+ char desc[BUF_SIZE];
+ int64_t total_size = 0, filesize;
+ char *adapter_type = NULL;
+ char *backing_file = NULL;
+ const char *fmt = NULL;
+ int flags = 0;
+ int ret = 0;
+ bool flat, split, compress;
+ char ext_desc_lines[BUF_SIZE] = "";
+ char path[PATH_MAX], prefix[PATH_MAX], postfix[PATH_MAX];
+ const int64_t split_size = 0x80000000; /* VMDK has constant split size */
+ const char *desc_extent_line;
+ char parent_desc_line[BUF_SIZE] = "";
+ uint32_t parent_cid = 0xffffffff;
+ uint32_t number_heads = 16;
+ bool zeroed_grain = false;
+ const char desc_template[] =
+ "# Disk DescriptorFile\n"
+ "version=1\n"
+ "CID=%x\n"
+ "parentCID=%x\n"
+ "createType=\"%s\"\n"
+ "%s"
+ "\n"
+ "# Extent description\n"
+ "%s"
+ "\n"
+ "# The Disk Data Base\n"
+ "#DDB\n"
+ "\n"
+ "ddb.virtualHWVersion = \"%d\"\n"
+ "ddb.geometry.cylinders = \"%" PRId64 "\"\n"
+ "ddb.geometry.heads = \"%d\"\n"
+ "ddb.geometry.sectors = \"63\"\n"
+ "ddb.adapterType = \"%s\"\n";
+
+ if (filename_decompose(filename, path, prefix, postfix, PATH_MAX)) {
+ ret = -EINVAL;
+ goto finish;
+ }
+ /* Read out opts */
+ total_size = qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0);
+ adapter_type = qemu_opt_get_del(opts, BLOCK_OPT_ADAPTER_TYPE);
+ backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
+ if (qemu_opt_get_bool_del(opts, BLOCK_OPT_COMPAT6, false)) {
+ flags |= BLOCK_FLAG_COMPAT6;
+ }
+ fmt = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT);
+ if (qemu_opt_get_bool_del(opts, BLOCK_OPT_ZEROED_GRAIN, false)) {
+ zeroed_grain = true;
+ }
+ if (!adapter_type) {
+ adapter_type = g_strdup("ide");
+ } else if (strcmp(adapter_type, "ide") &&
+ strcmp(adapter_type, "buslogic") &&
+ strcmp(adapter_type, "lsilogic") &&
+ strcmp(adapter_type, "legacyESX")) {
+ fprintf(stderr, "VMDK: Unknown adapter type: '%s'.\n", adapter_type);
+ ret = -EINVAL;
+ goto finish;
+ }
+ if (strcmp(adapter_type, "ide") != 0) {
+ /* that's the number of heads with which vmware operates when
+ creating, exporting, etc. vmdk files with a non-ide adapter type */
+ number_heads = 255;
+ }
+ if (!fmt) {
+ /* Default format to monolithicSparse */
+ fmt = "monolithicSparse";
+ } else if (strcmp(fmt, "monolithicFlat") &&
+ strcmp(fmt, "monolithicSparse") &&
+ strcmp(fmt, "twoGbMaxExtentSparse") &&
+ strcmp(fmt, "twoGbMaxExtentFlat") &&
+ strcmp(fmt, "streamOptimized")) {
+ fprintf(stderr, "VMDK: Unknown subformat: %s\n", fmt);
+ ret = -EINVAL;
+ goto finish;
+ }
+ split = !(strcmp(fmt, "twoGbMaxExtentFlat") &&
+ strcmp(fmt, "twoGbMaxExtentSparse"));
+ flat = !(strcmp(fmt, "monolithicFlat") &&
+ strcmp(fmt, "twoGbMaxExtentFlat"));
+ compress = !strcmp(fmt, "streamOptimized");
+ if (flat) {
+ desc_extent_line = "RW %lld FLAT \"%s\" 0\n";
+ } else {
+ desc_extent_line = "RW %lld SPARSE \"%s\"\n";
+ }
+ if (flat && backing_file) {
+ /* not supporting backing file for flat image */
+ ret = -ENOTSUP;
+ goto finish;
+ }
+ if (backing_file) {
+ BlockDriverState *bs = bdrv_new("");
+ ret = bdrv_open(bs, backing_file, NULL, 0, NULL);
+ if (ret != 0) {
+ bdrv_delete(bs);
+ goto finish;
+ }
+ if (strcmp(bs->drv->format_name, "vmdk")) {
+ bdrv_delete(bs);
+ ret = -EINVAL;
+ goto finish;
+ }
+ parent_cid = vmdk_read_cid(bs, 0);
+ bdrv_delete(bs);
+ snprintf(parent_desc_line, sizeof(parent_desc_line),
+ "parentFileNameHint=\"%s\"", backing_file);
+ }
+
+ /* Create extents */
+ filesize = total_size;
+ while (filesize > 0) {
+ char desc_line[BUF_SIZE];
+ char ext_filename[PATH_MAX];
+ char desc_filename[PATH_MAX];
+ int64_t size = filesize;
+
+ if (split && size > split_size) {
+ size = split_size;
+ }
+ if (split) {
+ snprintf(desc_filename, sizeof(desc_filename), "%s-%c%03d%s",
+ prefix, flat ? 'f' : 's', ++idx, postfix);
+ } else if (flat) {
+ snprintf(desc_filename, sizeof(desc_filename), "%s-flat%s",
+ prefix, postfix);
+ } else {
+ snprintf(desc_filename, sizeof(desc_filename), "%s%s",
+ prefix, postfix);
+ }
+ snprintf(ext_filename, sizeof(ext_filename), "%s%s",
+ path, desc_filename);
+
+ if (vmdk_create_extent(ext_filename, size,
+ flat, compress, zeroed_grain)) {
+ return -EINVAL;
+ }
+ filesize -= size;
+
+ /* Format description line */
+ snprintf(desc_line, sizeof(desc_line),
+ desc_extent_line, size / 512, desc_filename);
+ pstrcat(ext_desc_lines, sizeof(ext_desc_lines), desc_line);
+ }
+ /* generate descriptor file */
+ snprintf(desc, sizeof(desc), desc_template,
+ (unsigned int)time(NULL),
+ parent_cid,
+ fmt,
+ parent_desc_line,
+ ext_desc_lines,
+ (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4),
+ total_size / (int64_t)(63 * number_heads * 512), number_heads,
+ adapter_type);
+ if (split || flat) {
+ fd = qemu_open(filename,
+ O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE,
+ 0644);
+ } else {
+ fd = qemu_open(filename,
+ O_WRONLY | O_BINARY | O_LARGEFILE,
+ 0644);
+ }
+ if (fd < 0) {
+ ret = -errno;
+ goto finish;
+ }
+ /* the descriptor offset = 0x200 */
+ if (!split && !flat && 0x200 != lseek(fd, 0x200, SEEK_SET)) {
+ ret = -errno;
+ goto exit;
+ }
+ ret = qemu_write_full(fd, desc, strlen(desc));
+ if (ret != strlen(desc)) {
+ ret = -errno;
+ goto exit;
+ }
+ ret = 0;
+exit:
+ qemu_close(fd);
+finish:
+ g_free(adapter_type);
+ g_free(backing_file);
+ return ret;
+}
+
static void vmdk_close(BlockDriverState *bs)
{
BDRVVmdkState *s = bs->opaque;
@@ -1823,6 +2014,49 @@ static QEMUOptionParameter vmdk_create_options[] = {
{ NULL }
};
+static QemuOptsList vmdk_create_opts = {
+ .name = "vmdk-create-opts",
+ .head = QTAILQ_HEAD_INITIALIZER(vmdk_create_opts.head),
+ .desc = {
+ {
+ .name = BLOCK_OPT_SIZE,
+ .type = QEMU_OPT_SIZE,
+ .help = "Virtual disk size"
+ },
+ {
+ .name = BLOCK_OPT_ADAPTER_TYPE,
+ .type = QEMU_OPT_STRING,
+ .help = "Virtual adapter type, can be one of "
+ "ide (default), lsilogic, buslogic or legacyESX"
+ },
+ {
+ .name = BLOCK_OPT_BACKING_FILE,
+ .type = QEMU_OPT_STRING,
+ .help = "File name of a base image"
+ },
+ {
+ .name = BLOCK_OPT_COMPAT6,
+ .type = QEMU_OPT_BOOL,
+ .help = "VMDK version 6 image",
+ .def_value_str = "off"
+ },
+ {
+ .name = BLOCK_OPT_SUBFMT,
+ .type = QEMU_OPT_STRING,
+ .help =
+ "VMDK flat extent format, can be one of "
+ "{monolithicSparse (default) | monolithicFlat |
twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} "
+ },
+ {
+ .name = BLOCK_OPT_ZEROED_GRAIN,
+ .type = QEMU_OPT_BOOL,
+ .help = "Enable efficient zero writes "
+ "using the zeroed-grain GTE feature"
+ },
+ { /* end of list */ }
+ }
+};
+
static BlockDriver bdrv_vmdk = {
.format_name = "vmdk",
.instance_size = sizeof(BDRVVmdkState),
@@ -1834,12 +2068,14 @@ static BlockDriver bdrv_vmdk = {
.bdrv_co_write_zeroes = vmdk_co_write_zeroes,
.bdrv_close = vmdk_close,
.bdrv_create = vmdk_create,
+ .bdrv_create_new = vmdk_create_new,
.bdrv_co_flush_to_disk = vmdk_co_flush,
.bdrv_co_is_allocated = vmdk_co_is_allocated,
.bdrv_get_allocated_file_size = vmdk_get_allocated_file_size,
.bdrv_has_zero_init = vmdk_has_zero_init,
.create_options = vmdk_create_options,
+ .bdrv_create_opts = &vmdk_create_opts,
};
static void bdrv_vmdk_init(void)
--
1.7.11.7
