select.c File Reference

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/syscalls.h>
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/personality.h>
#include <linux/file.h>
#include <linux/fdtable.h>
#include <linux/fs.h>
#include <linux/rcupdate.h>
#include <linux/hrtimer.h>
#include <asm/uaccess.h>

Go to the source code of this file.

Data Structures
struct	poll_table_page
struct	poll_list

Macros
#define	MAX_SLACK   (100 * NSEC_PER_MSEC)
#define	POLL_TABLE_FULL(table)   ((unsigned long)((table)->entry+1) > PAGE_SIZE + (unsigned long)(table))
#define	FDS_IN(fds, n)   (fds->in + n)
#define	FDS_OUT(fds, n)   (fds->out + n)
#define	FDS_EX(fds, n)   (fds->ex + n)
#define	BITS(fds, n)   (*FDS_IN(fds, n)|*FDS_OUT(fds, n)|*FDS_EX(fds, n))
#define	POLLIN_SET   (POLLRDNORM | POLLRDBAND | POLLIN | POLLHUP | POLLERR)
#define	POLLOUT_SET   (POLLWRBAND | POLLWRNORM | POLLOUT | POLLERR)
#define	POLLEX_SET   (POLLPRI)
#define	POLLFD_PER_PAGE   ((PAGE_SIZE-sizeof(struct poll_list)) / sizeof(struct pollfd))
#define	N_STACK_PPS

Functions
long	select_estimate_accuracy (struct timespec *tv)
void	poll_initwait (struct poll_wqueues *pwq)
	EXPORT_SYMBOL (poll_initwait)
void	poll_freewait (struct poll_wqueues *pwq)
	EXPORT_SYMBOL (poll_freewait)
int	poll_schedule_timeout (struct poll_wqueues *pwq, int state, ktime_t *expires, unsigned long slack)
	EXPORT_SYMBOL (poll_schedule_timeout)
int	poll_select_set_timeout (struct timespec *to, long sec, long nsec)
int	do_select (int n, fd_set_bits *fds, struct timespec *end_time)
int	core_sys_select (int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct timespec *end_time)
	SYSCALL_DEFINE5 (select, int, n, fd_set __user *, inp, fd_set __user *, outp, fd_set __user *, exp, struct timeval __user *, tvp)
	SYSCALL_DEFINE6 (pselect6, int, n, fd_set __user *, inp, fd_set __user *, outp, fd_set __user *, exp, struct timespec __user *, tsp, void __user *, sig)
int	do_sys_poll (struct pollfd __user *ufds, unsigned int nfds, struct timespec *end_time)
	SYSCALL_DEFINE3 (poll, struct pollfd __user *, ufds, unsigned int, nfds, int, timeout_msecs)
	SYSCALL_DEFINE5 (ppoll, struct pollfd __user *, ufds, unsigned int, nfds, struct timespec __user *, tsp, const sigset_t __user *, sigmask, size_t, sigsetsize)

Macro Definition Documentation

#define BITS	(		fds,
			n
	)		(*FDS_IN(fds, n)|*FDS_OUT(fds, n)|*FDS_EX(fds, n))

Definition at line 337 of file select.c.

#define FDS_EX	(		fds,
			n
	)		(fds->ex + n)

Definition at line 335 of file select.c.

#define FDS_IN	(		fds,
			n
	)		(fds->in + n)

Definition at line 333 of file select.c.

#define FDS_OUT	(		fds,
			n
	)		(fds->out + n)

Definition at line 334 of file select.c.

#define MAX_SLACK   (100 * NSEC_PER_MSEC)

Definition at line 45 of file select.c.

#define N_STACK_PPS

Value:

((sizeof(stack_pps) - sizeof(struct poll_list))  / \
            sizeof(struct pollfd))

Definition at line 813 of file select.c.

#define POLL_TABLE_FULL

(

table

)

((unsigned long)((table)->entry+1) > PAGE_SIZE + (unsigned long)(table))

Definition at line 98 of file select.c.

#define POLLEX_SET   (POLLPRI)

Definition at line 383 of file select.c.

#define POLLFD_PER_PAGE   ((PAGE_SIZE-sizeof(struct poll_list)) / sizeof(struct pollfd))

Definition at line 710 of file select.c.

#define POLLIN_SET   (POLLRDNORM | POLLRDBAND | POLLIN | POLLHUP | POLLERR)

Definition at line 381 of file select.c.

#define POLLOUT_SET   (POLLWRBAND | POLLWRNORM | POLLOUT | POLLERR)

Definition at line 382 of file select.c.

Function Documentation

int core_sys_select	(	int	n,
		fd_set __user *	inp,
		fd_set __user *	outp,
		fd_set __user *	exp,
		struct timespec *	end_time
	)

Definition at line 516 of file select.c.

int do_select	(	int	n,
		fd_set_bits *	fds,
		struct timespec *	end_time
	)

Definition at line 395 of file select.c.

int do_sys_poll	(	struct pollfd __user *	ufds,
		unsigned int	nfds,
		struct timespec *	end_time
	)

Definition at line 816 of file select.c.

EXPORT_SYMBOL

(

poll_initwait

)

EXPORT_SYMBOL

(

poll_freewait

)

EXPORT_SYMBOL

(

poll_schedule_timeout

)

void poll_freewait

(

struct poll_wqueues *

pwq

)

Definition at line 133 of file select.c.

void poll_initwait

(

struct poll_wqueues *

pwq

)

Definition at line 116 of file select.c.

int poll_schedule_timeout	(	struct poll_wqueues *	pwq,
		int	state,
		ktime_t *	expires,
		unsigned long	slack
	)

Definition at line 231 of file select.c.

int poll_select_set_timeout	(	struct timespec *	to,
		long	sec,
		long	nsec
	)

poll_select_set_timeout - helper function to setup the timeout value : pointer to timespec variable for the final timeout : seconds (from user space) : nanoseconds (from user space)

Note, we do not use a timespec for the user space value here, That way we can use the function for timeval and compat interfaces as well.

Returns -EINVAL if sec/nsec are not normalized. Otherwise 0.

Definition at line 269 of file select.c.

long select_estimate_accuracy

(

struct timespec *

tv

)

Definition at line 70 of file select.c.

SYSCALL_DEFINE3	(	poll	,
		struct pollfd __user *	,
		ufds	,
		unsigned	int,
		nfds	,
		int	,
		timeout_msecs
	)

Definition at line 903 of file select.c.

SYSCALL_DEFINE5	(	select	,
		int	,
		n	,
		fd_set __user *	,
		inp	,
		fd_set __user *	,
		outp	,
		fd_set __user *	,
		exp	,
		struct timeval __user *	,
		tvp
	)

Definition at line 591 of file select.c.

SYSCALL_DEFINE5	(	ppoll	,
		struct pollfd __user *	,
		ufds	,
		unsigned	int,
		nfds	,
		struct timespec __user *	,
		tsp	,
		const sigset_t __user *	,
		sigmask	,
		size_t	,
		sigsetsize
	)

Definition at line 937 of file select.c.

SYSCALL_DEFINE6	(	pselect6	,
		int	,
		n	,
		fd_set __user *	,
		inp	,
		fd_set __user *	,
		outp	,
		fd_set __user *	,
		exp	,
		struct timespec __user *	,
		tsp	,
		void __user *	,
		sig
	)

Definition at line 669 of file select.c.