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qemu / qemu / 00d4f525ec8d9394c4e86e36f01ac68d30128dd6 / . / block / raw-aio.h
blob: 8cf084eeb50df175ae468d2b31b3380ef2d16560 [file] [log] [blame]
Christoph Hellwig9ef91a62009-08-20 16:58:19 +0200[diff] [blame]1/*
Paolo Bonzini9f8540e2012-06-09 10:57:37 +0200[diff] [blame]2 * Declarations for AIO in the raw protocol
Christoph Hellwig9ef91a62009-08-20 16:58:19 +0200[diff] [blame]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 *
Paolo Bonzini6b620ca2012-01-13 17:44:23 +0100[diff] [blame]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.
Christoph Hellwig9ef91a62009-08-20 16:58:19 +0200[diff] [blame]14 */
Paolo Bonzini9f8540e2012-06-09 10:57:37 +0200[diff] [blame]15#ifndef QEMU_RAW_AIO_H
16#define QEMU_RAW_AIO_H
Christoph Hellwig9ef91a62009-08-20 16:58:19 +0200[diff] [blame]17
18/* AIO request types */
19#define QEMU_AIO_READ 0x0001
20#define QEMU_AIO_WRITE 0x0002
21#define QEMU_AIO_IOCTL 0x0004
Christoph Hellwigb2e12bc2009-09-04 19:01:49 +0200[diff] [blame]22#define QEMU_AIO_FLUSH 0x0008
Paolo Bonzini82380102013-01-14 16:26:55 +0100[diff] [blame]23#define QEMU_AIO_DISCARD 0x0010
Paolo Bonzini97a2ae32013-11-22 13:39:57 +0100[diff] [blame]24#define QEMU_AIO_WRITE_ZEROES 0x0020
Christoph Hellwig9ef91a62009-08-20 16:58:19 +0200[diff] [blame]25#define QEMU_AIO_TYPE_MASK \
Paolo Bonzini82380102013-01-14 16:26:55 +0100[diff] [blame]26 (QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL|QEMU_AIO_FLUSH| \
Paolo Bonzini97a2ae32013-11-22 13:39:57 +0100[diff] [blame]27 QEMU_AIO_DISCARD|QEMU_AIO_WRITE_ZEROES)
Christoph Hellwig9ef91a62009-08-20 16:58:19 +0200[diff] [blame]28
29/* AIO flags */
30#define QEMU_AIO_MISALIGNED 0x1000
Paolo Bonzini82380102013-01-14 16:26:55 +0100[diff] [blame]31#define QEMU_AIO_BLKDEV 0x2000
Christoph Hellwig9ef91a62009-08-20 16:58:19 +0200[diff] [blame]32
33
Christoph Hellwig5c6c3a62009-08-20 16:58:35 +0200[diff] [blame]34/* linux-aio.c - Linux native implementation */
Paolo Bonzini9f8540e2012-06-09 10:57:37 +0200[diff] [blame]35#ifdef CONFIG_LINUX_AIO
Christoph Hellwig5c6c3a62009-08-20 16:58:35 +0200[diff] [blame]36void *laio_init(void);
Stefan Hajnocziabd269b2014-05-08 16:34:48 +0200[diff] [blame]37void laio_cleanup(void *s);
Christoph Hellwig5c6c3a62009-08-20 16:58:35 +0200[diff] [blame]38BlockDriverAIOCB *laio_submit(BlockDriverState *bs, void *aio_ctx, int fd,
39 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
40 BlockDriverCompletionFunc *cb, void *opaque, int type);
Stefan Hajnoczic2f34262014-05-08 16:34:47 +0200[diff] [blame]41void laio_detach_aio_context(void *s, AioContext *old_context);
42void laio_attach_aio_context(void *s, AioContext *new_context);
Paolo Bonzini9f8540e2012-06-09 10:57:37 +0200[diff] [blame]43#endif
Christoph Hellwig5c6c3a62009-08-20 16:58:35 +0200[diff] [blame]44
Paolo Bonzinia2736522012-10-26 11:43:58 +0200[diff] [blame]45#ifdef _WIN32
46typedef struct QEMUWin32AIOState QEMUWin32AIOState;
47QEMUWin32AIOState *win32_aio_init(void);
Stefan Hajnoczi99cc5982014-05-08 16:34:49 +0200[diff] [blame]48void win32_aio_cleanup(QEMUWin32AIOState *aio);
Paolo Bonzinia2736522012-10-26 11:43:58 +0200[diff] [blame]49int win32_aio_attach(QEMUWin32AIOState *aio, HANDLE hfile);
50BlockDriverAIOCB *win32_aio_submit(BlockDriverState *bs,
51 QEMUWin32AIOState *aio, HANDLE hfile,
52 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
53 BlockDriverCompletionFunc *cb, void *opaque, int type);
Stefan Hajnoczi85ebd382014-05-08 16:34:50 +0200[diff] [blame]54void win32_aio_detach_aio_context(QEMUWin32AIOState *aio,
55 AioContext *old_context);
56void win32_aio_attach_aio_context(QEMUWin32AIOState *aio,
57 AioContext *new_context);
Paolo Bonzinia2736522012-10-26 11:43:58 +0200[diff] [blame]58#endif
59
Paolo Bonzini9f8540e2012-06-09 10:57:37 +0200[diff] [blame]60#endif /* QEMU_RAW_AIO_H */