LXR qemu/block/raw-aio.h

   1/*
   2 * Declarations for AIO in the raw protocol
   3 *
   4 * Copyright IBM, Corp. 2008
   5 *
   6 * Authors:
   7 *  Anthony Liguori   <aliguori@us.ibm.com>
   8 *
   9 * This work is licensed under the terms of the GNU GPL, version 2.  See
  10 * the COPYING file in the top-level directory.
  11 *
  12 * Contributions after 2012-01-13 are licensed under the terms of the
  13 * GNU GPL, version 2 or (at your option) any later version.
  14 */
  15#ifndef QEMU_RAW_AIO_H
  16#define QEMU_RAW_AIO_H
  17
  18/* AIO request types */
  19#define QEMU_AIO_READ         0x0001
  20#define QEMU_AIO_WRITE        0x0002
  21#define QEMU_AIO_IOCTL        0x0004
  22#define QEMU_AIO_FLUSH        0x0008
  23#define QEMU_AIO_TYPE_MASK \
  24        (QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL|QEMU_AIO_FLUSH)
  25
  26/* AIO flags */
  27#define QEMU_AIO_MISALIGNED   0x1000
  28
  29
  30/* linux-aio.c - Linux native implementation */
  31#ifdef CONFIG_LINUX_AIO
  32void *laio_init(void);
  33BlockDriverAIOCB *laio_submit(BlockDriverState *bs, void *aio_ctx, int fd,
  34        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
  35        BlockDriverCompletionFunc *cb, void *opaque, int type);
  36#endif
  37
  38#ifdef _WIN32
  39typedef struct QEMUWin32AIOState QEMUWin32AIOState;
  40QEMUWin32AIOState *win32_aio_init(void);
  41int win32_aio_attach(QEMUWin32AIOState *aio, HANDLE hfile);
  42BlockDriverAIOCB *win32_aio_submit(BlockDriverState *bs,
  43        QEMUWin32AIOState *aio, HANDLE hfile,
  44        int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
  45        BlockDriverCompletionFunc *cb, void *opaque, int type);
  46#endif
  47
  48#endif /* QEMU_RAW_AIO_H */
  49