ceph/src/spdk/lib/bdev/aio/blockdev_aio.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright (c) Intel Corporation.
   5  *   All rights reserved.
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   7  *   Redistribution and use in source and binary forms, with or without
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  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
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  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #ifndef SPDK_BLOCKDEV_AIO_H
  35 #define SPDK_BLOCKDEV_AIO_H
  36
  37 #include <stdint.h>
  38 #include <libaio.h>
  39
  40 #include "spdk/queue.h"
  41 #include "spdk/bdev.h"
  42
  43 #include "spdk_internal/bdev.h"
  44
  45 struct blockdev_aio_task {
  46         struct iocb                     iocb;
  47         uint64_t                        len;
  48         TAILQ_ENTRY(blockdev_aio_task)  link;
  49 };
  50
  51 struct blockdev_aio_io_channel {
  52         io_context_t            io_ctx;
  53         long                    queue_depth;
  54         struct io_event         *events;
  55         struct spdk_poller      *poller;
  56 };
  57
  58 struct file_disk {
  59         struct spdk_bdev        disk;
  60         const char              *file;
  61         int                     fd;
  62         char                    disk_name[SPDK_BDEV_MAX_NAME_LENGTH];
  63         uint64_t                size;
  64
  65         /**
  66          * For storing I/O that were completed synchronously, and will be
  67          *   completed during next check_io call.
  68          */
  69         TAILQ_HEAD(, blockdev_aio_task) sync_completion_list;
  70 };
  71
  72 struct spdk_bdev *create_aio_disk(const char *name, const char *fname);
  73
  74 #endif // SPDK_BLOCKDEV_AIO_H