aio.c File Reference

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/time.h>
#include <linux/aio_abi.h>
#include <linux/export.h>
#include <linux/syscalls.h>
#include <linux/backing-dev.h>
#include <linux/uio.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/mm.h>
#include <linux/mman.h>
#include <linux/mmu_context.h>
#include <linux/slab.h>
#include <linux/timer.h>
#include <linux/aio.h>
#include <linux/highmem.h>
#include <linux/workqueue.h>
#include <linux/security.h>
#include <linux/eventfd.h>
#include <linux/blkdev.h>
#include <linux/compat.h>
#include <asm/kmap_types.h>
#include <asm/uaccess.h>

Go to the source code of this file.

Data Structures
struct	kiocb_batch
struct	aio_timeout

Macros
#define	DEBUG   0
#define	dprintk(x...)   do { ; } while (0)
#define	AIO_EVENTS_PER_PAGE   (PAGE_SIZE / sizeof(struct io_event))
#define	AIO_EVENTS_FIRST_PAGE   ((PAGE_SIZE - sizeof(struct aio_ring)) / sizeof(struct io_event))
#define	AIO_EVENTS_OFFSET   (AIO_EVENTS_PER_PAGE - AIO_EVENTS_FIRST_PAGE)
#define	aio_ring_event(info, nr)
#define	put_aio_ring_event(event)
#define	KIOCB_BATCH_SIZE   32L

Functions
	__initcall (aio_setup)
ssize_t	wait_on_sync_kiocb (struct kiocb *iocb)
	EXPORT_SYMBOL (wait_on_sync_kiocb)
void	exit_aio (struct mm_struct *mm)
int	aio_put_req (struct kiocb *req)
	EXPORT_SYMBOL (aio_put_req)
void	kick_iocb (struct kiocb *iocb)
	EXPORT_SYMBOL (kick_iocb)
int	aio_complete (struct kiocb *iocb, long res, long res2)
	EXPORT_SYMBOL (aio_complete)
	SYSCALL_DEFINE2 (io_setup, unsigned, nr_events, aio_context_t __user *, ctxp)
	SYSCALL_DEFINE1 (io_destroy, aio_context_t, ctx)
long	do_io_submit (aio_context_t ctx_id, long nr, struct iocb __user *__user *iocbpp, bool compat)
	SYSCALL_DEFINE3 (io_submit, aio_context_t, ctx_id, long, nr, struct iocb __user *__user *, iocbpp)
	SYSCALL_DEFINE3 (io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb, struct io_event __user *, result)
	SYSCALL_DEFINE5 (io_getevents, aio_context_t, ctx_id, long, min_nr, long, nr, struct io_event __user *, events, struct timespec __user *, timeout)

Variables
unsigned long	aio_nr
unsigned long	aio_max_nr = 0x10000

Macro Definition Documentation

#define AIO_EVENTS_FIRST_PAGE   ((PAGE_SIZE - sizeof(struct aio_ring)) / sizeof(struct io_event))

Definition at line 173 of file aio.c.

#define AIO_EVENTS_OFFSET   (AIO_EVENTS_PER_PAGE - AIO_EVENTS_FIRST_PAGE)

Definition at line 174 of file aio.c.

#define AIO_EVENTS_PER_PAGE   (PAGE_SIZE / sizeof(struct io_event))

Definition at line 172 of file aio.c.

#define aio_ring_event	(		info,
			nr
	)

Value:

({                  \
    unsigned pos = (nr) + AIO_EVENTS_OFFSET;            \
	struct io_event *__event;                  \
    __event = kmap_atomic(                      \
            (info)->ring_pages[pos / AIO_EVENTS_PER_PAGE]); \
    __event += pos % AIO_EVENTS_PER_PAGE;               \
    __event;                            \
})

Definition at line 176 of file aio.c.

#define DEBUG   0

Definition at line 21 of file aio.c.

#define dprintk

(

x...

)

do { ; } while (0)

Definition at line 45 of file aio.c.

#define KIOCB_BATCH_SIZE   32L

Definition at line 436 of file aio.c.

#define put_aio_ring_event

(

event

)

Value:

do {        \
	struct io_event *__event = (event);    \
    (void)__event;              \
    kunmap_atomic((void *)((unsigned long)__event & PAGE_MASK)); \
} while(0)

Definition at line 185 of file aio.c.

Function Documentation

__initcall

(

aio_setup

)

int aio_complete	(	struct kiocb *	iocb,
		long	res,
		long	res2
	)

Definition at line 892 of file aio.c.

int aio_put_req

(

struct kiocb *

req

)

Definition at line 576 of file aio.c.

long do_io_submit	(	aio_context_t	ctx_id,
		long	nr,
		struct iocb __user *__user *	iocbpp,
		bool	compat
	)

Definition at line 1610 of file aio.c.

void exit_aio

(

struct mm_struct *

mm

)

Definition at line 369 of file aio.c.

EXPORT_SYMBOL

(

wait_on_sync_kiocb

)

EXPORT_SYMBOL

(

aio_put_req

)

EXPORT_SYMBOL

(

kick_iocb

)

EXPORT_SYMBOL

(

aio_complete

)

void kick_iocb

(

struct kiocb *

iocb

)

Definition at line 873 of file aio.c.

SYSCALL_DEFINE1	(	io_destroy	,
		aio_context_t	,
		ctx
	)

Definition at line 1267 of file aio.c.

SYSCALL_DEFINE2	(	io_setup	,
		unsigned	,
		nr_events	,
		aio_context_t __user *	,
		ctxp
	)

Definition at line 1231 of file aio.c.

SYSCALL_DEFINE3	(	io_submit	,
		aio_context_t	,
		ctx_id	,
		long	,
		nr	,
		struct iocb __user *__user *	,
		iocbpp
	)

Definition at line 1679 of file aio.c.

SYSCALL_DEFINE3	(	io_cancel	,
		aio_context_t	,
		ctx_id	,
		struct iocb __user *	,
		iocb	,
		struct io_event __user *	,
		result
	)

Definition at line 1714 of file aio.c.

SYSCALL_DEFINE5	(	io_getevents	,
		aio_context_t	,
		ctx_id	,
		long	,
		min_nr	,
		long	,
		nr	,
		struct io_event __user *	,
		events	,
		struct timespec __user *	,
		timeout
	)

Definition at line 1777 of file aio.c.

ssize_t wait_on_sync_kiocb

(

struct kiocb *

iocb

)

Definition at line 349 of file aio.c.

Variable Documentation

unsigned long aio_max_nr = 0x10000

Definition at line 51 of file aio.c.

unsigned long aio_nr

Definition at line 50 of file aio.c.