2009-08-20 16:58:19 +02:00
|
|
|
/*
|
2012-06-09 10:57:37 +02:00
|
|
|
* Declarations for AIO in the raw protocol
|
2009-08-20 16:58:19 +02:00
|
|
|
*
|
|
|
|
|
* Copyright IBM, Corp. 2008
|
|
|
|
|
*
|
|
|
|
|
* Authors:
|
|
|
|
|
* Anthony Liguori <aliguori@us.ibm.com>
|
|
|
|
|
*
|
|
|
|
|
* This work is licensed under the terms of the GNU GPL, version 2. See
|
|
|
|
|
* the COPYING file in the top-level directory.
|
|
|
|
|
*
|
2012-01-13 17:44:23 +01:00
|
|
|
* Contributions after 2012-01-13 are licensed under the terms of the
|
|
|
|
|
* GNU GPL, version 2 or (at your option) any later version.
|
2009-08-20 16:58:19 +02:00
|
|
|
*/
|
2019-08-12 07:23:31 +02:00
|
|
|
|
2012-06-09 10:57:37 +02:00
|
|
|
#ifndef QEMU_RAW_AIO_H
|
|
|
|
|
#define QEMU_RAW_AIO_H
|
2009-08-20 16:58:19 +02:00
|
|
|
|
2019-08-12 07:23:31 +02:00
|
|
|
#include "block/aio.h"
|
2014-08-06 17:18:07 +02:00
|
|
|
#include "qemu/coroutine.h"
|
2016-03-09 10:52:44 +01:00
|
|
|
#include "qemu/iov.h"
|
|
|
|
|
|
2009-08-20 16:58:19 +02:00
|
|
|
/* AIO request types */
|
|
|
|
|
#define QEMU_AIO_READ 0x0001
|
|
|
|
|
#define QEMU_AIO_WRITE 0x0002
|
|
|
|
|
#define QEMU_AIO_IOCTL 0x0004
|
2009-09-04 19:01:49 +02:00
|
|
|
#define QEMU_AIO_FLUSH 0x0008
|
2013-01-14 16:26:55 +01:00
|
|
|
#define QEMU_AIO_DISCARD 0x0010
|
2013-11-22 13:39:57 +01:00
|
|
|
#define QEMU_AIO_WRITE_ZEROES 0x0020
|
2018-06-01 11:26:43 +02:00
|
|
|
#define QEMU_AIO_COPY_RANGE 0x0040
|
2018-06-21 18:23:16 +02:00
|
|
|
#define QEMU_AIO_TRUNCATE 0x0080
|
2009-08-20 16:58:19 +02:00
|
|
|
#define QEMU_AIO_TYPE_MASK \
|
2018-06-01 11:26:43 +02:00
|
|
|
(QEMU_AIO_READ | \
|
|
|
|
|
QEMU_AIO_WRITE | \
|
|
|
|
|
QEMU_AIO_IOCTL | \
|
|
|
|
|
QEMU_AIO_FLUSH | \
|
|
|
|
|
QEMU_AIO_DISCARD | \
|
|
|
|
|
QEMU_AIO_WRITE_ZEROES | \
|
2018-06-21 18:23:16 +02:00
|
|
|
QEMU_AIO_COPY_RANGE | \
|
|
|
|
|
QEMU_AIO_TRUNCATE)
|
2009-08-20 16:58:19 +02:00
|
|
|
|
|
|
|
|
/* AIO flags */
|
|
|
|
|
#define QEMU_AIO_MISALIGNED 0x1000
|
2013-01-14 16:26:55 +01:00
|
|
|
#define QEMU_AIO_BLKDEV 0x2000
|
2019-03-22 13:45:23 +01:00
|
|
|
#define QEMU_AIO_NO_FALLBACK 0x4000
|
2009-08-20 16:58:19 +02:00
|
|
|
|
|
|
|
|
|
2009-08-20 16:58:35 +02:00
|
|
|
/* linux-aio.c - Linux native implementation */
|
2012-06-09 10:57:37 +02:00
|
|
|
#ifdef CONFIG_LINUX_AIO
|
2016-04-07 18:33:35 +02:00
|
|
|
typedef struct LinuxAioState LinuxAioState;
|
linux-aio: properly bubble up errors from initialization
laio_init() can fail for a couple of reasons, which will lead to a NULL
pointer dereference in laio_attach_aio_context().
To solve this, add a aio_setup_linux_aio() function which is called
early in raw_open_common. If this fails, propagate the error up. The
signature of aio_get_linux_aio() was not modified, because it seems
preferable to return the actual errno from the possible failing
initialization calls.
Additionally, when the AioContext changes, we need to associate a
LinuxAioState with the new AioContext. Use the bdrv_attach_aio_context
callback and call the new aio_setup_linux_aio(), which will allocate a
new AioContext if needed, and return errors on failures. If it fails for
any reason, fallback to threaded AIO with an error message, as the
device is already in-use by the guest.
Add an assert that aio_get_linux_aio() cannot return NULL.
Signed-off-by: Nishanth Aravamudan <naravamudan@digitalocean.com>
Message-id: 20180622193700.6523-1-naravamudan@digitalocean.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2018-06-22 21:37:00 +02:00
|
|
|
LinuxAioState *laio_init(Error **errp);
|
2016-04-07 18:33:35 +02:00
|
|
|
void laio_cleanup(LinuxAioState *s);
|
2014-08-06 17:18:07 +02:00
|
|
|
int coroutine_fn laio_co_submit(BlockDriverState *bs, LinuxAioState *s, int fd,
|
2016-06-03 17:36:27 +02:00
|
|
|
uint64_t offset, QEMUIOVector *qiov, int type);
|
2016-04-07 18:33:35 +02:00
|
|
|
void laio_detach_aio_context(LinuxAioState *s, AioContext *old_context);
|
|
|
|
|
void laio_attach_aio_context(LinuxAioState *s, AioContext *new_context);
|
|
|
|
|
void laio_io_plug(BlockDriverState *bs, LinuxAioState *s);
|
|
|
|
|
void laio_io_unplug(BlockDriverState *bs, LinuxAioState *s);
|
2012-06-09 10:57:37 +02:00
|
|
|
#endif
|
2020-01-20 15:18:47 +01:00
|
|
|
/* io_uring.c - Linux io_uring implementation */
|
|
|
|
|
#ifdef CONFIG_LINUX_IO_URING
|
|
|
|
|
typedef struct LuringState LuringState;
|
|
|
|
|
LuringState *luring_init(Error **errp);
|
|
|
|
|
void luring_cleanup(LuringState *s);
|
|
|
|
|
int coroutine_fn luring_co_submit(BlockDriverState *bs, LuringState *s, int fd,
|
|
|
|
|
uint64_t offset, QEMUIOVector *qiov, int type);
|
|
|
|
|
void luring_detach_aio_context(LuringState *s, AioContext *old_context);
|
|
|
|
|
void luring_attach_aio_context(LuringState *s, AioContext *new_context);
|
|
|
|
|
void luring_io_plug(BlockDriverState *bs, LuringState *s);
|
|
|
|
|
void luring_io_unplug(BlockDriverState *bs, LuringState *s);
|
|
|
|
|
#endif
|
2009-08-20 16:58:35 +02:00
|
|
|
|
2012-10-26 11:43:58 +02:00
|
|
|
#ifdef _WIN32
|
|
|
|
|
typedef struct QEMUWin32AIOState QEMUWin32AIOState;
|
|
|
|
|
QEMUWin32AIOState *win32_aio_init(void);
|
2014-05-08 16:34:49 +02:00
|
|
|
void win32_aio_cleanup(QEMUWin32AIOState *aio);
|
2012-10-26 11:43:58 +02:00
|
|
|
int win32_aio_attach(QEMUWin32AIOState *aio, HANDLE hfile);
|
2014-10-07 13:59:14 +02:00
|
|
|
BlockAIOCB *win32_aio_submit(BlockDriverState *bs,
|
2012-10-26 11:43:58 +02:00
|
|
|
QEMUWin32AIOState *aio, HANDLE hfile,
|
2018-04-24 21:25:02 +02:00
|
|
|
uint64_t offset, uint64_t bytes, QEMUIOVector *qiov,
|
2014-10-07 13:59:15 +02:00
|
|
|
BlockCompletionFunc *cb, void *opaque, int type);
|
2014-05-08 16:34:50 +02:00
|
|
|
void win32_aio_detach_aio_context(QEMUWin32AIOState *aio,
|
|
|
|
|
AioContext *old_context);
|
|
|
|
|
void win32_aio_attach_aio_context(QEMUWin32AIOState *aio,
|
|
|
|
|
AioContext *new_context);
|
2012-10-26 11:43:58 +02:00
|
|
|
#endif
|
|
|
|
|
|
2012-06-09 10:57:37 +02:00
|
|
|
#endif /* QEMU_RAW_AIO_H */
|