2f08dc7f7f
This patch aligns delay bdev with other bdev modules that allow passing specific uuid during their creation. See malloc or null bdev modules. Change-Id: Icc5e816dd42b2e55e8d57712f2d4f125e486fdab Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com> Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/16840 Reviewed-by: Shuhei Matsumoto <smatsumoto@nvidia.com> Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com>
60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright (C) 2019 Intel Corporation.
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* All rights reserved.
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*/
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#ifndef SPDK_VBDEV_DELAY_H
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#define SPDK_VBDEV_DELAY_H
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#include "spdk/stdinc.h"
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#include "spdk/bdev.h"
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#include "spdk/bdev_module.h"
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enum delay_io_type {
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DELAY_AVG_READ,
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DELAY_P99_READ,
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DELAY_AVG_WRITE,
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DELAY_P99_WRITE,
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DELAY_NONE
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};
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/**
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* Create new delay bdev.
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*
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* \param bdev_name Bdev on which delay vbdev will be created.
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* \param vbdev_name Name of the delay bdev.
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* \param uuid UUID of the delay bdev.
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* \param avg_read_latency Desired typical read latency.
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* \param p99_read_latency Desired p99 read latency
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* \param avg_write_latency Desired typical write latency.
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* \param p99_write_latency Desired p99 write latency
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* \return 0 on success, other on failure.
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*/
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int create_delay_disk(const char *bdev_name, const char *vbdev_name, struct spdk_uuid *uuid,
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uint64_t avg_read_latency,
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uint64_t p99_read_latency, uint64_t avg_write_latency, uint64_t p99_write_latency);
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/**
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* Delete delay bdev.
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*
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* \param vbdev_name Name of the delay bdev.
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* \param cb_fn Function to call after deletion.
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* \param cb_arg Argument to pass to cb_fn.
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*/
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void delete_delay_disk(const char *vbdev_name, spdk_bdev_unregister_cb cb_fn,
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void *cb_arg);
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/**
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* Update one of the latency values for a given delay bdev.
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*
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* \param delay_name The name of the delay bdev
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* \param latency_us The new latency value, in microseconds
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* \param type a valid value from the delay_io_type enum
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* \return 0 on success, -ENODEV if the bdev cannot be found, and -EINVAL if the bdev is not a delay device.
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*/
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int vbdev_delay_update_latency_value(char *delay_name, uint64_t latency_us,
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enum delay_io_type type);
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#endif /* SPDK_VBDEV_DELAY_H */
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