ceph/src/spdk/test/lib/blob/bs_dev_common.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright (c) Intel Corporation.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #define DEV_BUFFER_SIZE (64 * 1024 * 1024)
  35 #define DEV_BUFFER_BLOCKLEN (4096)
  36 #define DEV_BUFFER_BLOCKCNT (DEV_BUFFER_SIZE / DEV_BUFFER_BLOCKLEN)
  37 uint8_t *g_dev_buffer;
  38
  39 static struct spdk_io_channel *
  40 dev_create_channel(struct spdk_bs_dev *dev)
  41 {
  42         return NULL;
  43 }
  44
  45 static void
  46 dev_destroy_channel(struct spdk_bs_dev *dev, struct spdk_io_channel *channel)
  47 {
  48 }
  49
  50 static void
  51 dev_destroy(struct spdk_bs_dev *dev)
  52 {
  53 }
  54
  55 static void
  56 dev_read(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, void *payload,
  57          uint64_t lba, uint32_t lba_count,
  58          struct spdk_bs_dev_cb_args *cb_args)
  59 {
  60         uint64_t offset, length;
  61
  62         offset = lba * DEV_BUFFER_BLOCKLEN;
  63         length = lba_count * DEV_BUFFER_BLOCKLEN;
  64         SPDK_CU_ASSERT_FATAL(offset + length <= DEV_BUFFER_SIZE);
  65         memcpy(payload, &g_dev_buffer[offset], length);
  66         cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0);
  67 }
  68
  69 static void
  70 dev_write(struct spdk_bs_dev *dev, struct spdk_io_channel *channel, void *payload,
  71           uint64_t lba, uint32_t lba_count,
  72           struct spdk_bs_dev_cb_args *cb_args)
  73 {
  74         uint64_t offset, length;
  75
  76         offset = lba * DEV_BUFFER_BLOCKLEN;
  77         length = lba_count * DEV_BUFFER_BLOCKLEN;
  78         SPDK_CU_ASSERT_FATAL(offset + length <= DEV_BUFFER_SIZE);
  79         memcpy(&g_dev_buffer[offset], payload, length);
  80         cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0);
  81 }
  82
  83 static void
  84 dev_flush(struct spdk_bs_dev *dev, struct spdk_io_channel *channel,
  85           struct spdk_bs_dev_cb_args *cb_args)
  86 {
  87         cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0);
  88 }
  89
  90 static void
  91 dev_unmap(struct spdk_bs_dev *dev, struct spdk_io_channel *channel,
  92           uint64_t lba, uint32_t lba_count,
  93           struct spdk_bs_dev_cb_args *cb_args)
  94 {
  95         uint64_t offset, length;
  96
  97         offset = lba * DEV_BUFFER_BLOCKLEN;
  98         length = lba_count * DEV_BUFFER_BLOCKLEN;
  99         SPDK_CU_ASSERT_FATAL(offset + length <= DEV_BUFFER_SIZE);
 100         memset(&g_dev_buffer[offset], 0, length);
 101         cb_args->cb_fn(cb_args->channel, cb_args->cb_arg, 0);
 102 }
 103
 104 static void
 105 init_dev(struct spdk_bs_dev *dev)
 106 {
 107         dev->create_channel = dev_create_channel;
 108         dev->destroy_channel = dev_destroy_channel;
 109         dev->destroy = dev_destroy;
 110         dev->read = dev_read;
 111         dev->write = dev_write;
 112         dev->flush = dev_flush;
 113         dev->unmap = dev_unmap;
 114         dev->blockcnt = DEV_BUFFER_BLOCKCNT;
 115         dev->blocklen = DEV_BUFFER_BLOCKLEN;
 116 }