1 files changed, 100 insertions, 0 deletions

diff --git a/tools/blktap2/drivers/tapdisk-driver.c b/tools/blktap2/drivers/tapdisk-driver.c
new file mode 100644
index 0000000000..ca5629ab73
--- /dev/null
+++ b/tools/blktap2/drivers/tapdisk-driver.c
@@ -0,0 +1,100 @@
+/* 
+ * Copyright (c) 2008, XenSource Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of XenSource Inc. nor the names of its contributors
+ *       may be used to endorse or promote products derived from this software
+ *       without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+ * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <stdlib.h>
+
+#include "tapdisk-driver.h"
+#include "tapdisk-server.h"
+
+td_driver_t *
+tapdisk_driver_allocate(int type, char *name, td_flag_t flags, int storage)
+{
+	int err;
+	td_driver_t *driver;
+	struct tap_disk *ops;
+
+	ops = tapdisk_server_find_driver_interface(type);
+	if (!ops)
+		return NULL;
+
+	driver = calloc(1, sizeof(td_driver_t));
+	if (!driver)
+		return NULL;
+
+	err = tapdisk_namedup(&driver->name, name);
+	if (err)
+		goto fail;
+
+	driver->ops     = ops;
+	driver->type    = type;
+	driver->storage = storage;
+	driver->data    = calloc(1, ops->private_data_size);
+	if (!driver->data)
+		goto fail;
+
+	if (td_flag_test(flags, TD_OPEN_RDONLY))
+		td_flag_set(driver->state, TD_DRIVER_RDONLY);
+
+	return driver;
+
+fail:
+	free(driver->name);
+	free(driver->data);
+	free(driver);
+	return NULL;
+}
+
+void
+tapdisk_driver_free(td_driver_t *driver)
+{
+	if (!driver)
+		return;
+
+	if (driver->refcnt)
+		return;
+
+	if (td_flag_test(driver->state, TD_DRIVER_OPEN))
+		EPRINTF("freeing open driver %s (state 0x%08x)\n",
+			driver->name, driver->state);
+
+	free(driver->name);
+	free(driver->data);
+	free(driver);
+}
+
+void
+tapdisk_driver_queue_tiocb(td_driver_t *driver, struct tiocb *tiocb)
+{
+	tapdisk_server_queue_tiocb(tiocb);
+}
+
+void
+tapdisk_driver_debug(td_driver_t *driver)
+{
+	if (driver->ops->td_debug)
+		driver->ops->td_debug(driver);
+}