raw-aio.h (3196B)
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 16#ifndef QEMU_RAW_AIO_H 17#define QEMU_RAW_AIO_H 18 19#include "block/aio.h" 20#include "qemu/coroutine.h" 21#include "qemu/iov.h" 22 23/* AIO request types */ 24#define QEMU_AIO_READ 0x0001 25#define QEMU_AIO_WRITE 0x0002 26#define QEMU_AIO_IOCTL 0x0004 27#define QEMU_AIO_FLUSH 0x0008 28#define QEMU_AIO_DISCARD 0x0010 29#define QEMU_AIO_WRITE_ZEROES 0x0020 30#define QEMU_AIO_COPY_RANGE 0x0040 31#define QEMU_AIO_TRUNCATE 0x0080 32#define QEMU_AIO_TYPE_MASK \ 33 (QEMU_AIO_READ | \ 34 QEMU_AIO_WRITE | \ 35 QEMU_AIO_IOCTL | \ 36 QEMU_AIO_FLUSH | \ 37 QEMU_AIO_DISCARD | \ 38 QEMU_AIO_WRITE_ZEROES | \ 39 QEMU_AIO_COPY_RANGE | \ 40 QEMU_AIO_TRUNCATE) 41 42/* AIO flags */ 43#define QEMU_AIO_MISALIGNED 0x1000 44#define QEMU_AIO_BLKDEV 0x2000 45#define QEMU_AIO_NO_FALLBACK 0x4000 46 47 48/* linux-aio.c - Linux native implementation */ 49#ifdef CONFIG_LINUX_AIO 50typedef struct LinuxAioState LinuxAioState; 51LinuxAioState *laio_init(Error **errp); 52void laio_cleanup(LinuxAioState *s); 53int coroutine_fn laio_co_submit(BlockDriverState *bs, LinuxAioState *s, int fd, 54 uint64_t offset, QEMUIOVector *qiov, int type); 55void laio_detach_aio_context(LinuxAioState *s, AioContext *old_context); 56void laio_attach_aio_context(LinuxAioState *s, AioContext *new_context); 57void laio_io_plug(BlockDriverState *bs, LinuxAioState *s); 58void laio_io_unplug(BlockDriverState *bs, LinuxAioState *s); 59#endif 60/* io_uring.c - Linux io_uring implementation */ 61#ifdef CONFIG_LINUX_IO_URING 62typedef struct LuringState LuringState; 63LuringState *luring_init(Error **errp); 64void luring_cleanup(LuringState *s); 65int coroutine_fn luring_co_submit(BlockDriverState *bs, LuringState *s, int fd, 66 uint64_t offset, QEMUIOVector *qiov, int type); 67void luring_detach_aio_context(LuringState *s, AioContext *old_context); 68void luring_attach_aio_context(LuringState *s, AioContext *new_context); 69void luring_io_plug(BlockDriverState *bs, LuringState *s); 70void luring_io_unplug(BlockDriverState *bs, LuringState *s); 71#endif 72 73#ifdef _WIN32 74typedef struct QEMUWin32AIOState QEMUWin32AIOState; 75QEMUWin32AIOState *win32_aio_init(void); 76void win32_aio_cleanup(QEMUWin32AIOState *aio); 77int win32_aio_attach(QEMUWin32AIOState *aio, HANDLE hfile); 78BlockAIOCB *win32_aio_submit(BlockDriverState *bs, 79 QEMUWin32AIOState *aio, HANDLE hfile, 80 uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, 81 BlockCompletionFunc *cb, void *opaque, int type); 82void win32_aio_detach_aio_context(QEMUWin32AIOState *aio, 83 AioContext *old_context); 84void win32_aio_attach_aio_context(QEMUWin32AIOState *aio, 85 AioContext *new_context); 86#endif 87 88#endif /* QEMU_RAW_AIO_H */