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_TYPE_MASK \ 29 (QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL|QEMU_AIO_FLUSH| \ 30 QEMU_AIO_DISCARD|QEMU_AIO_WRITE_ZEROES) 31 32 /* AIO flags */ 33 #define QEMU_AIO_MISALIGNED 0x1000 34 #define QEMU_AIO_BLKDEV 0x2000 35 36 37 /* linux-aio.c - Linux native implementation */ 38 #ifdef CONFIG_LINUX_AIO 39 typedef struct LinuxAioState LinuxAioState; 40 LinuxAioState *laio_init(void); 41 void laio_cleanup(LinuxAioState *s); 42 int coroutine_fn laio_co_submit(BlockDriverState *bs, LinuxAioState *s, int fd, 43 uint64_t offset, QEMUIOVector *qiov, int type); 44 BlockAIOCB *laio_submit(BlockDriverState *bs, LinuxAioState *s, int fd, 45 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, 46 BlockCompletionFunc *cb, void *opaque, int type); 47 void laio_detach_aio_context(LinuxAioState *s, AioContext *old_context); 48 void laio_attach_aio_context(LinuxAioState *s, AioContext *new_context); 49 void laio_io_plug(BlockDriverState *bs, LinuxAioState *s); 50 void laio_io_unplug(BlockDriverState *bs, LinuxAioState *s); 51 #endif 52 53 #ifdef _WIN32 54 typedef struct QEMUWin32AIOState QEMUWin32AIOState; 55 QEMUWin32AIOState *win32_aio_init(void); 56 void win32_aio_cleanup(QEMUWin32AIOState *aio); 57 int win32_aio_attach(QEMUWin32AIOState *aio, HANDLE hfile); 58 BlockAIOCB *win32_aio_submit(BlockDriverState *bs, 59 QEMUWin32AIOState *aio, HANDLE hfile, 60 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, 61 BlockCompletionFunc *cb, void *opaque, int type); 62 void win32_aio_detach_aio_context(QEMUWin32AIOState *aio, 63 AioContext *old_context); 64 void win32_aio_attach_aio_context(QEMUWin32AIOState *aio, 65 AioContext *new_context); 66 #endif 67 68 #endif /* QEMU_RAW_AIO_H */ 69