a8c32ed5fe
Actually write/writev/write_zeroes/unmap are never be called, and we add the error code here to keep it same style with snapshot bs_bdev. Change-Id: I32ad051c1902bd7080b894e36f7c89f1c8d27434 Signed-off-by: Changpeng Liu <changpeng.liu@intel.com> Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/456924 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com>
123 lines
3.8 KiB
C
123 lines
3.8 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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#include "spdk/stdinc.h"
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#include "spdk/blob.h"
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#include "blobstore.h"
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static void
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zeroes_destroy(struct spdk_bs_dev *bs_dev)
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{
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return;
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}
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static void
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zeroes_read(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, void *payload,
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uint64_t lba, uint32_t lba_count, struct spdk_bs_dev_cb_args *cb_args)
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{
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memset(payload, 0, dev->blocklen * lba_count);
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cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0);
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}
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static void
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zeroes_write(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, void *payload,
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uint64_t lba, uint32_t lba_count,
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struct spdk_bs_dev_cb_args *cb_args)
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{
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cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, -EPERM);
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assert(false);
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}
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static void
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zeroes_readv(struct spdk_bs_dev *dev, struct spdk_io_channel *channel,
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struct iovec *iov, int iovcnt,
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uint64_t lba, uint32_t lba_count, struct spdk_bs_dev_cb_args *cb_args)
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{
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int i;
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for (i = 0; i < iovcnt; i++) {
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memset(iov[i].iov_base, 0, iov[i].iov_len);
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}
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cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0);
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}
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static void
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zeroes_writev(struct spdk_bs_dev *dev, struct spdk_io_channel *channel,
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struct iovec *iov, int iovcnt,
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uint64_t lba, uint32_t lba_count,
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struct spdk_bs_dev_cb_args *cb_args)
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{
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cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, -EPERM);
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assert(false);
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}
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static void
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zeroes_write_zeroes(struct spdk_bs_dev *dev, struct spdk_io_channel *channel,
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uint64_t lba, uint32_t lba_count,
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struct spdk_bs_dev_cb_args *cb_args)
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{
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cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, -EPERM);
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assert(false);
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}
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static void
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zeroes_unmap(struct spdk_bs_dev *dev, struct spdk_io_channel *channel,
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uint64_t lba, uint32_t lba_count,
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struct spdk_bs_dev_cb_args *cb_args)
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{
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cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, -EPERM);
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assert(false);
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}
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static struct spdk_bs_dev g_zeroes_bs_dev = {
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.blockcnt = UINT64_MAX,
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.blocklen = 512,
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.create_channel = NULL,
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.destroy_channel = NULL,
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.destroy = zeroes_destroy,
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.read = zeroes_read,
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.write = zeroes_write,
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.readv = zeroes_readv,
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.writev = zeroes_writev,
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.write_zeroes = zeroes_write_zeroes,
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.unmap = zeroes_unmap,
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};
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struct spdk_bs_dev *
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spdk_bs_create_zeroes_dev(void)
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{
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return &g_zeroes_bs_dev;
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}
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