a6dbe3721e
per Intel policy to include file commit date using git cmd below. The policy does not apply to non-Intel (C) notices. git log --follow -C90% --format=%ad --date default <file> | tail -1 and then pull just the 4 digit year from the result. Intel copyrights were not added to files where Intel either had no contribution ot the contribution lacked substance (ie license header updates, formatting changes, etc). Contribution date used "--follow -C95%" to get the most accurate date. Note that several files in this patch didn't end the license/(c) block with a blank comment line so these were added as the vast majority of files do have this last blank line. Simply there for consistency. Signed-off-by: paul luse <paul.e.luse@intel.com> Change-Id: Id5b7ce4f658fe87132f14139ead58d6e285c04d4 Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15192 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Community-CI: Mellanox Build Bot
58 lines
1.7 KiB
C
58 lines
1.7 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 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, 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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