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 #include "qemu/coroutine.h" 19 #include "qemu/iov.h" 20 21 /* AIO request types */ 22 #define QEMU_AIO_READ 0x0001 23 #define QEMU_AIO_WRITE 0x0002 24 #define QEMU_AIO_IOCTL 0x0004 25 #define QEMU_AIO_FLUSH 0x0008 26 #define QEMU_AIO_DISCARD 0x0010 27 #define QEMU_AIO_WRITE_ZEROES 0x0020 28 #define QEMU_AIO_COPY_RANGE 0x0040 29 #define QEMU_AIO_TRUNCATE 0x0080 30 #define QEMU_AIO_TYPE_MASK \ 31 (QEMU_AIO_READ | \ 32 QEMU_AIO_WRITE | \ 33 QEMU_AIO_IOCTL | \ 34 QEMU_AIO_FLUSH | \ 35 QEMU_AIO_DISCARD | \ 36 QEMU_AIO_WRITE_ZEROES | \ 37 QEMU_AIO_COPY_RANGE | \ 38 QEMU_AIO_TRUNCATE) 39 40 /* AIO flags */ 41 #define QEMU_AIO_MISALIGNED 0x1000 42 #define QEMU_AIO_BLKDEV 0x2000 43 #define QEMU_AIO_NO_FALLBACK 0x4000 44 45 46 /* linux-aio.c - Linux native implementation */ 47 #ifdef CONFIG_LINUX_AIO 48 typedef struct LinuxAioState LinuxAioState; 49 LinuxAioState *laio_init(Error **errp); 50 void laio_cleanup(LinuxAioState *s); 51 int coroutine_fn laio_co_submit(BlockDriverState *bs, LinuxAioState *s, int fd, 52 uint64_t offset, QEMUIOVector *qiov, int type); 53 BlockAIOCB *laio_submit(BlockDriverState *bs, LinuxAioState *s, int fd, 54 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, 55 BlockCompletionFunc *cb, void *opaque, int type); 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 #endif 61 62 #ifdef _WIN32 63 typedef struct QEMUWin32AIOState QEMUWin32AIOState; 64 QEMUWin32AIOState *win32_aio_init(void); 65 void win32_aio_cleanup(QEMUWin32AIOState *aio); 66 int win32_aio_attach(QEMUWin32AIOState *aio, HANDLE hfile); 67 BlockAIOCB *win32_aio_submit(BlockDriverState *bs, 68 QEMUWin32AIOState *aio, HANDLE hfile, 69 uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, 70 BlockCompletionFunc *cb, void *opaque, int type); 71 void win32_aio_detach_aio_context(QEMUWin32AIOState *aio, 72 AioContext *old_context); 73 void win32_aio_attach_aio_context(QEMUWin32AIOState *aio, 74 AioContext *new_context); 75 #endif 76 77 #endif /* QEMU_RAW_AIO_H */ 78