1 files changed, 85 insertions, 0 deletions
diff --git a/src/spdk/module/bdev/delay/vbdev_delay.h b/src/spdk/module/bdev/delay/vbdev_delay.h
new file mode 100644
index 000000000..4f88a5e2f
--- /dev/null
+++ b/src/spdk/module/bdev/delay/vbdev_delay.h
@@ -0,0 +1,85 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) Intel Corporation.
+ *   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 Intel Corporation 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.
+ */
+
+#ifndef SPDK_VBDEV_DELAY_H
+#define SPDK_VBDEV_DELAY_H
+
+#include "spdk/stdinc.h"
+
+#include "spdk/bdev.h"
+#include "spdk/bdev_module.h"
+
+enum delay_io_type {
+	DELAY_AVG_READ,
+	DELAY_P99_READ,
+	DELAY_AVG_WRITE,
+	DELAY_P99_WRITE,
+	DELAY_NONE
+};
+
+/**
+ * Create new delay bdev.
+ *
+ * \param bdev_name Bdev on which delay vbdev will be created.
+ * \param vbdev_name Name of the delay bdev.
+ * \param avg_read_latency Desired typical read latency.
+ * \param p99_read_latency Desired p99 read latency
+ * \param avg_write_latency Desired typical write latency.
+ * \param p99_write_latency Desired p99 write latency
+ * \return 0 on success, other on failure.
+ */
+int create_delay_disk(const char *bdev_name, const char *vbdev_name, uint64_t avg_read_latency,
+		      uint64_t p99_read_latency, uint64_t avg_write_latency, uint64_t p99_write_latency);
+
+/**
+ * Delete delay bdev.
+ *
+ * \param bdev Pointer to delay bdev.
+ * \param cb_fn Function to call after deletion.
+ * \param cb_arg Argument to pass to cb_fn.
+ */
+void delete_delay_disk(struct spdk_bdev *bdev, spdk_bdev_unregister_cb cb_fn,
+		       void *cb_arg);
+
+/**
+ * Update one of the latency values for a given delay bdev.
+ *
+ * \param delay_name The name of the delay bdev
+ * \param latency_us The new latency value, in microseconds
+ * \param type a valid value from the delay_io_type enum
+ * \return 0 on success, -ENODEV if the bdev cannot be found, and -EINVAL if the bdev is not a delay device.
+ */
+int vbdev_delay_update_latency_value(char *delay_name, uint64_t latency_us,
+				     enum delay_io_type type);
+
+#endif /* SPDK_VBDEV_DELAY_H */