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Diffstat (limited to 'src/spdk/lib/blob/zeroes.c')
| -rw-r--r-- | src/spdk/lib/blob/zeroes.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/spdk/lib/blob/zeroes.c b/src/spdk/lib/blob/zeroes.c new file mode 100644 index 00000000..5b482417 --- /dev/null +++ b/src/spdk/lib/blob/zeroes.c @@ -0,0 +1,122 @@ +/*- + * 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. + */ + +#include "spdk/stdinc.h" +#include "spdk/blob.h" + +#include "blobstore.h" + +static void +zeroes_destroy(struct spdk_bs_dev *bs_dev) +{ + return; +} + +static void +zeroes_read(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, void *payload, + uint64_t lba, uint32_t lba_count, struct spdk_bs_dev_cb_args *cb_args) +{ + memset(payload, 0, dev->blocklen * lba_count); + cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0); +} + +static void +zeroes_write(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, void *payload, + uint64_t lba, uint32_t lba_count, + struct spdk_bs_dev_cb_args *cb_args) +{ + cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, -EPERM); + assert(false); +} + +static void +zeroes_readv(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, + struct iovec *iov, int iovcnt, + uint64_t lba, uint32_t lba_count, struct spdk_bs_dev_cb_args *cb_args) +{ + int i; + + for (i = 0; i < iovcnt; i++) { + memset(iov[i].iov_base, 0, iov[i].iov_len); + } + + cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0); +} + + + +static void +zeroes_writev(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, + struct iovec *iov, int iovcnt, + uint64_t lba, uint32_t lba_count, + struct spdk_bs_dev_cb_args *cb_args) +{ + cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, -EPERM); + assert(false); +} + +static void +zeroes_write_zeroes(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, + uint64_t lba, uint32_t lba_count, + struct spdk_bs_dev_cb_args *cb_args) +{ + cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0); +} + +static void +zeroes_unmap(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, + uint64_t lba, uint32_t lba_count, + struct spdk_bs_dev_cb_args *cb_args) +{ + cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0); +} + +static struct spdk_bs_dev g_zeroes_bs_dev = { + .blockcnt = UINT64_MAX, + .blocklen = 512, + .create_channel = NULL, + .destroy_channel = NULL, + .destroy = zeroes_destroy, + .read = zeroes_read, + .write = zeroes_write, + .readv = zeroes_readv, + .writev = zeroes_writev, + .write_zeroes = zeroes_write_zeroes, + .unmap = zeroes_unmap, +}; + +struct spdk_bs_dev * +spdk_bs_create_zeroes_dev(void) +{ + return &g_zeroes_bs_dev; +} |