file.c File Reference

#include <linux/syscalls.h>
#include <linux/export.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/mmzone.h>
#include <linux/time.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/file.h>
#include <linux/fdtable.h>
#include <linux/bitops.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/rcupdate.h>
#include <linux/workqueue.h>

Go to the source code of this file.

Data Structures
struct	fdtable_defer

Functions
struct files_struct *	dup_fd (struct files_struct *oldf, int *errorp)
struct files_struct *	get_files_struct (struct task_struct *task)
void	put_files_struct (struct files_struct *files)
void	reset_files_struct (struct files_struct *files)
void	exit_files (struct task_struct *tsk)
void __init	files_defer_init (void)
void	daemonize_descriptors (void)
int	__alloc_fd (struct files_struct *files, unsigned start, unsigned end, unsigned flags)
int	get_unused_fd_flags (unsigned flags)
	EXPORT_SYMBOL (get_unused_fd_flags)
void	put_unused_fd (unsigned int fd)
	EXPORT_SYMBOL (put_unused_fd)
void	__fd_install (struct files_struct *files, unsigned int fd, struct file *file)
void	fd_install (unsigned int fd, struct file *file)
	EXPORT_SYMBOL (fd_install)
int	__close_fd (struct files_struct *files, unsigned fd)
void	do_close_on_exec (struct files_struct *files)
struct file *	fget (unsigned int fd)
	EXPORT_SYMBOL (fget)
struct file *	fget_raw (unsigned int fd)
	EXPORT_SYMBOL (fget_raw)
struct file *	fget_light (unsigned int fd, int *fput_needed)
	EXPORT_SYMBOL (fget_light)
struct file *	fget_raw_light (unsigned int fd, int *fput_needed)
void	set_close_on_exec (unsigned int fd, int flag)
bool	get_close_on_exec (unsigned int fd)
int	replace_fd (unsigned fd, struct file *file, unsigned flags)
	SYSCALL_DEFINE3 (dup3, unsigned int, oldfd, unsigned int, newfd, int, flags)
	SYSCALL_DEFINE2 (dup2, unsigned int, oldfd, unsigned int, newfd)
	SYSCALL_DEFINE1 (dup, unsigned int, fildes)
int	f_dupfd (unsigned int from, struct file *file, unsigned flags)
int	iterate_fd (struct files_struct *files, unsigned n, int(*f)(const void *, struct file *, unsigned), const void *p)
	EXPORT_SYMBOL (iterate_fd)

Variables
int sysctl_nr_open	__read_mostly = 1024*1024
int	sysctl_nr_open_min = BITS_PER_LONG
int	sysctl_nr_open_max = 1024 * 1024
struct files_struct	init_files

Function Documentation

int __alloc_fd	(	struct files_struct *	files,
		unsigned	start,
		unsigned	end,
		unsigned	flags
	)

Definition at line 531 of file file.c.

int __close_fd	(	struct files_struct *	files,
		unsigned	fd
	)

Definition at line 659 of file file.c.

void __fd_install	(	struct files_struct *	files,
		unsigned int	fd,
		struct file *	file
	)

Definition at line 638 of file file.c.

void daemonize_descriptors

(

void

)

Definition at line 522 of file file.c.

void do_close_on_exec

(

struct files_struct *

files

)

Definition at line 682 of file file.c.

struct files_struct* dup_fd ( struct files_struct *  oldf, int *  errorp  )

read

Definition at line 298 of file file.c.

void exit_files

(

struct task_struct *

tsk

)

Definition at line 481 of file file.c.

EXPORT_SYMBOL

(

get_unused_fd_flags

)

EXPORT_SYMBOL

(

put_unused_fd

)

EXPORT_SYMBOL

(

fd_install

)

EXPORT_SYMBOL

(

fget

)

EXPORT_SYMBOL

(

fget_raw

)

EXPORT_SYMBOL

(

fget_light

)

EXPORT_SYMBOL

(

iterate_fd

)

int f_dupfd	(	unsigned int	from,
		struct file *	file,
		unsigned	flags
	)

Definition at line 979 of file file.c.

void fd_install	(	unsigned int	fd,
		struct file *	file
	)

Definition at line 649 of file file.c.

struct file* fget ( unsigned int  fd )

read

Definition at line 718 of file file.c.

struct file* fget_light ( unsigned int  fd, int *  fput_needed  )

read

Definition at line 773 of file file.c.

struct file* fget_raw ( unsigned int  fd )

read

Definition at line 738 of file file.c.

struct file* fget_raw_light ( unsigned int  fd, int *  fput_needed  )

read

Definition at line 801 of file file.c.

void __init files_defer_init

(

void

)

Definition at line 501 of file file.c.

bool get_close_on_exec

(

unsigned int

fd

)

Definition at line 838 of file file.c.

struct files_struct* get_files_struct ( struct task_struct *  task )

read

Definition at line 439 of file file.c.

int get_unused_fd_flags

(

unsigned

flags

)

Definition at line 594 of file file.c.

int iterate_fd	(	struct files_struct *	files,
		unsigned	n,
		int(*)(const void *, struct file *, unsigned)	f,
		const void *	p
	)

Definition at line 992 of file file.c.

void put_files_struct

(

struct files_struct *

files

)

Definition at line 452 of file file.c.

void put_unused_fd

(

unsigned int

fd

)

Definition at line 608 of file file.c.

int replace_fd	(	unsigned	fd,
		struct file *	file,
		unsigned	flags
	)

Definition at line 893 of file file.c.

void reset_files_struct

(

struct files_struct *

files

)

Definition at line 469 of file file.c.

void set_close_on_exec	(	unsigned int	fd,
		int	flag
	)

Definition at line 825 of file file.c.

SYSCALL_DEFINE1	(	dup	,
		unsigned	int,
		fildes
	)

Definition at line 964 of file file.c.

SYSCALL_DEFINE2	(	dup2	,
		unsigned	int,
		oldfd	,
		unsigned	int,
		newfd
	)

Definition at line 949 of file file.c.

SYSCALL_DEFINE3	(	dup3	,
		unsigned	int,
		oldfd	,
		unsigned	int,
		newfd	,
		int	,
		flags
	)

Definition at line 915 of file file.c.

Variable Documentation

int sysctl_nr_open __read_mostly = 1024*1024

Definition at line 32 of file file.c.

struct files_struct init_files

Initial value:

= {
    .count      = ATOMIC_INIT(1),
    .fdt        = &init_files.fdtab,
    .fdtab      = {
        .max_fds    = NR_OPEN_DEFAULT,
        .fd     = &init_files.fd_array[0],
        .close_on_exec  = init_files.close_on_exec_init,
        .open_fds   = init_files.open_fds_init,
    },
    .file_lock  = __SPIN_LOCK_UNLOCKED(init_task.file_lock),
}

Definition at line 510 of file file.c.

int sysctl_nr_open_max = 1024 * 1024

Definition at line 34 of file file.c.

int sysctl_nr_open_min = BITS_PER_LONG

Definition at line 33 of file file.c.