2fe6d1d5d4
Add a callback to spdk_nbd_start so that it can complete asynchronously. As of this patch, it always calls the callback immediately. Change-Id: I6156fb203145362afa5e4102183b6cf143051c0c Signed-off-by: Ben Walker <benjamin.walker@intel.com> Reviewed-on: https://review.gerrithub.io/433937 Tested-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com> Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com>
105 lines
3.1 KiB
C
105 lines
3.1 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright (c) Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/** \file
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* Network block device layer
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*/
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#ifndef SPDK_NBD_H_
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#define SPDK_NBD_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct spdk_bdev;
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struct spdk_nbd_disk;
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struct spdk_json_write_ctx;
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struct spdk_event;
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/**
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* Initialize the network block device layer.
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*
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* \return 0 on success.
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*/
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int spdk_nbd_init(void);
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/**
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* Stop and close all the running network block devices.
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*/
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void spdk_nbd_fini(void);
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/**
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* Called when an NBD device has been started.
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*/
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typedef void (*spdk_nbd_start_cb)(void *cb_arg, struct spdk_nbd_disk *nbd,
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int rc);
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/**
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* Start a network block device backed by the bdev.
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*
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* \param bdev_name Name of bdev exposed as a network block device.
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* \param nbd_path Path to the registered network block device.
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* \param cb_fn Called when the device has been started.
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* \param cb_arg Passed to cb_fn.
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*
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* \return A negated error number is passed to cb_fn on failure.
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*/
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void spdk_nbd_start(const char *bdev_name, const char *nbd_path,
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spdk_nbd_start_cb cb_fn, void *cb_arg);
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/**
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* Stop the running network block device safely.
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*
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* \param nbd A pointer to the network block device to stop.
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*/
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void spdk_nbd_stop(struct spdk_nbd_disk *nbd);
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/**
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* Get the local filesystem path used for the network block device.
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*/
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const char *spdk_nbd_get_path(struct spdk_nbd_disk *nbd);
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/**
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* Write NBD subsystem configuration into provided JSON context.
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*
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* \param w JSON write context
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*/
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void spdk_nbd_write_config_json(struct spdk_json_write_ctx *w);
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#ifdef __cplusplus
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}
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#endif
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#endif
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