iscsi: add iscsi_create support
This patch adds support for bdrv_create. This allows e.g.
to use qemu-img to convert from any supported device to
an iscsi backed storage as destination.
Signed-off-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/block/iscsi.c b/block/iscsi.c
index 041ee07..d8382fd 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -957,6 +957,56 @@
return 0;
}
+static int iscsi_create(const char *filename, QEMUOptionParameter *options)
+{
+ int ret = 0;
+ int64_t total_size = 0;
+ BlockDriverState bs;
+ IscsiLun *iscsilun = NULL;
+
+ memset(&bs, 0, sizeof(BlockDriverState));
+
+ /* Read out options */
+ while (options && options->name) {
+ if (!strcmp(options->name, "size")) {
+ total_size = options->value.n / BDRV_SECTOR_SIZE;
+ }
+ options++;
+ }
+
+ bs.opaque = g_malloc0(sizeof(struct IscsiLun));
+ iscsilun = bs.opaque;
+
+ ret = iscsi_open(&bs, filename, 0);
+ if (ret != 0) {
+ goto out;
+ }
+ if (iscsilun->type != TYPE_DISK) {
+ ret = -ENODEV;
+ goto out;
+ }
+ if (bs.total_sectors < total_size) {
+ ret = -ENOSPC;
+ }
+
+ ret = 0;
+out:
+ if (iscsilun->iscsi != NULL) {
+ iscsi_destroy_context(iscsilun->iscsi);
+ }
+ g_free(bs.opaque);
+ return ret;
+}
+
+static QEMUOptionParameter iscsi_create_options[] = {
+ {
+ .name = BLOCK_OPT_SIZE,
+ .type = OPT_SIZE,
+ .help = "Virtual disk size"
+ },
+ { NULL }
+};
+
static BlockDriver bdrv_iscsi = {
.format_name = "iscsi",
.protocol_name = "iscsi",
@@ -964,6 +1014,8 @@
.instance_size = sizeof(IscsiLun),
.bdrv_file_open = iscsi_open,
.bdrv_close = iscsi_close,
+ .bdrv_create = iscsi_create,
+ .create_options = iscsi_create_options,
.bdrv_getlength = iscsi_getlength,
