| 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 "qemu/aiocb.h" |
| 20 | #include "qemu/aio.h" |
| 21 | #include "block/block-common.h" |
| 22 | #include "qemu/iov.h" |
| 23 | |
| 24 | /* AIO request types */ |
| 25 | #define QEMU_AIO_READ 0x0001 |
| 26 | #define QEMU_AIO_WRITE 0x0002 |
| 27 | #define QEMU_AIO_IOCTL 0x0004 |
| 28 | #define QEMU_AIO_FLUSH 0x0008 |
| 29 | #define QEMU_AIO_DISCARD 0x0010 |
| 30 | #define QEMU_AIO_WRITE_ZEROES 0x0020 |
| 31 | #define QEMU_AIO_COPY_RANGE 0x0040 |
| 32 | #define QEMU_AIO_TRUNCATE 0x0080 |
| 33 | #define QEMU_AIO_ZONE_REPORT 0x0100 |
| 34 | #define QEMU_AIO_ZONE_MGMT 0x0200 |
| 35 | #define QEMU_AIO_ZONE_APPEND 0x0400 |
| 36 | #define QEMU_AIO_TYPE_MASK \ |
| 37 | (QEMU_AIO_READ | \ |
| 38 | QEMU_AIO_WRITE | \ |
| 39 | QEMU_AIO_IOCTL | \ |
| 40 | QEMU_AIO_FLUSH | \ |
| 41 | QEMU_AIO_DISCARD | \ |
| 42 | QEMU_AIO_WRITE_ZEROES | \ |
| 43 | QEMU_AIO_COPY_RANGE | \ |
| 44 | QEMU_AIO_TRUNCATE | \ |
| 45 | QEMU_AIO_ZONE_REPORT | \ |
| 46 | QEMU_AIO_ZONE_MGMT | \ |
| 47 | QEMU_AIO_ZONE_APPEND) |
| 48 | |
| 49 | /* AIO flags */ |
| 50 | #define QEMU_AIO_MISALIGNED 0x1000 |
| 51 | #define QEMU_AIO_BLKDEV 0x2000 |
| 52 | #define QEMU_AIO_NO_FALLBACK 0x4000 |
| 53 | |
| 54 | |
| 55 | /* linux-aio.c - Linux native implementation */ |
| 56 | #ifdef CONFIG_LINUX_AIO |
| 57 | typedef struct LinuxAioState LinuxAioState; |
| 58 | LinuxAioState *laio_init(Error **errp); |
| 59 | void laio_cleanup(LinuxAioState *s); |
| 60 | |
| 61 | /* laio_co_submit: submit I/O requests in the thread's current AioContext. */ |
| 62 | int coroutine_fn laio_co_submit(int fd, uint64_t offset, QEMUIOVector *qiov, |
| 63 | int type, BdrvRequestFlags flags, |
| 64 | uint64_t dev_max_batch); |
| 65 | |
| 66 | bool laio_has_fdsync(int); |
| 67 | bool laio_has_fua(void); |
| 68 | void laio_detach_aio_context(LinuxAioState *s, AioContext *old_context); |
| 69 | void laio_attach_aio_context(LinuxAioState *s, AioContext *new_context); |
| 70 | #else |
| 71 | static inline bool laio_has_fua(void) |
| 72 | { |
| 73 | return false; |
| 74 | } |
| 75 | #endif |
| 76 | /* io_uring.c - Linux io_uring implementation */ |
| 77 | #ifdef CONFIG_LINUX_IO_URING |
| 78 | /* luring_co_submit: submit I/O requests in the thread's current AioContext. */ |
| 79 | int coroutine_fn luring_co_submit(BlockDriverState *bs, int fd, uint64_t offset, |
| 80 | QEMUIOVector *qiov, int type, |
| 81 | BdrvRequestFlags flags); |
| 82 | bool luring_has_fua(void); |
| 83 | #else |
| 84 | static inline bool luring_has_fua(void) |
| 85 | { |
| 86 | return false; |
| 87 | } |
| 88 | #endif |
| 89 | |
| 90 | #ifdef _WIN32 |
| 91 | typedef struct QEMUWin32AIOState QEMUWin32AIOState; |
| 92 | QEMUWin32AIOState *win32_aio_init(void); |
| 93 | void win32_aio_cleanup(QEMUWin32AIOState *aio); |
| 94 | int win32_aio_attach(QEMUWin32AIOState *aio, HANDLE hfile); |
| 95 | BlockAIOCB *win32_aio_submit(BlockDriverState *bs, |
| 96 | QEMUWin32AIOState *aio, HANDLE hfile, |
| 97 | uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, |
| 98 | BlockCompletionFunc *cb, void *opaque, int type); |
| 99 | void win32_aio_detach_aio_context(QEMUWin32AIOState *aio, |
| 100 | AioContext *old_context); |
| 101 | void win32_aio_attach_aio_context(QEMUWin32AIOState *aio, |
| 102 | AioContext *new_context); |
| 103 | #endif |
| 104 | |
| 105 | #endif /* QEMU_RAW_AIO_H */ |