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 50 typedef struct LinuxAioState LinuxAioState; 51 LinuxAioState *laio_init(Error **errp); 52 void laio_cleanup(LinuxAioState *s); 53 int coroutine_fn laio_co_submit(BlockDriverState *bs, LinuxAioState *s, int fd, 54 uint64_t offset, QEMUIOVector *qiov, int type, 55 uint64_t dev_max_batch); 56 void laio_detach_aio_context(LinuxAioState *s, AioContext *old_context); 57 void laio_attach_aio_context(LinuxAioState *s, AioContext *new_context); 58 void laio_io_plug(BlockDriverState *bs, LinuxAioState *s); 59 void laio_io_unplug(BlockDriverState *bs, LinuxAioState *s, 60 uint64_t dev_max_batch); 61 #endif 62 /* io_uring.c - Linux io_uring implementation */ 63 #ifdef CONFIG_LINUX_IO_URING 64 typedef struct LuringState LuringState; 65 LuringState *luring_init(Error **errp); 66 void luring_cleanup(LuringState *s); 67 int coroutine_fn luring_co_submit(BlockDriverState *bs, LuringState *s, int fd, 68 uint64_t offset, QEMUIOVector *qiov, int type); 69 void luring_detach_aio_context(LuringState *s, AioContext *old_context); 70 void luring_attach_aio_context(LuringState *s, AioContext *new_context); 71 void luring_io_plug(BlockDriverState *bs, LuringState *s); 72 void luring_io_unplug(BlockDriverState *bs, LuringState *s); 73 #endif 74 75 #ifdef _WIN32 76 typedef struct QEMUWin32AIOState QEMUWin32AIOState; 77 QEMUWin32AIOState *win32_aio_init(void); 78 void win32_aio_cleanup(QEMUWin32AIOState *aio); 79 int win32_aio_attach(QEMUWin32AIOState *aio, HANDLE hfile); 80 BlockAIOCB *win32_aio_submit(BlockDriverState *bs, 81 QEMUWin32AIOState *aio, HANDLE hfile, 82 uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, 83 BlockCompletionFunc *cb, void *opaque, int type); 84 void win32_aio_detach_aio_context(QEMUWin32AIOState *aio, 85 AioContext *old_context); 86 void win32_aio_attach_aio_context(QEMUWin32AIOState *aio, 87 AioContext *new_context); 88 #endif 89 90 #endif /* QEMU_RAW_AIO_H */ 91