Initial commit

Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>

modules/cas_cache/volume/obj_blk.h

@@ -0,0 +1,53 @@
+/*
+* Copyright(c) 2012-2019 Intel Corporation
+* SPDX-License-Identifier: BSD-3-Clause-Clear
+*/
+
+#ifndef __OBJ_BLK_H__
+#define __OBJ_BLK_H__
+
+#include "vol_atomic_dev_bottom.h"
+#include "vol_block_dev_bottom.h"
+#include "vol_block_dev_top.h"
+
+struct casdsk_disk;
+
+struct bd_object {
+	struct casdsk_disk *dsk;
+	struct block_device *btm_bd;
+	/**
+	 * This denotes state of volatile write cache of the device.
+	 * This is set to true when:
+	 *  - opening the device
+	 *  - when writing to a device without FUA/FLUSH flags
+	 * This is set to false when:
+	 *  - FLUSH request is completed on device.
+	 * When it is false
+	 *  - FLUSH requests from upper layer are NOT passed to the device.
+	 */
+	atomic_t potentially_dirty;
+
+	uint32_t expobj_valid : 1;
+		/*!< Bit indicates that exported object was created */
+
+	uint32_t expobj_locked : 1;
+		/*!< Non zero value indicates data exported object is locked */
+
+	uint32_t opened_by_bdev : 1;
+		/*!< Opened by supplying bdev manually */
+
+	struct atomic_dev_params atomic_params;
+
+	atomic64_t pending_rqs;
+		/*!< This fields describes in flight IO requests */
+
+	struct workqueue_struct *workqueue;
+		/*< Workqueue for internally trigerred I/O */
+};
+
+static inline struct bd_object *bd_object(ocf_volume_t vol)
+{
+	return ocf_volume_get_priv(vol);
+}
+
+#endif /* __OBJ_BLK_H__ */