file_table.c File Reference

#include <linux/string.h>
#include <linux/slab.h>
#include <linux/file.h>
#include <linux/fdtable.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/security.h>
#include <linux/eventpoll.h>
#include <linux/rcupdate.h>
#include <linux/mount.h>
#include <linux/capability.h>
#include <linux/cdev.h>
#include <linux/fsnotify.h>
#include <linux/sysctl.h>
#include <linux/lglock.h>
#include <linux/percpu_counter.h>
#include <linux/percpu.h>
#include <linux/hardirq.h>
#include <linux/task_work.h>
#include <linux/ima.h>
#include <linux/atomic.h>
#include "internal.h"

Go to the source code of this file.

Macros
#define	do_file_list_for_each_entry(__sb, __file)
#define	while_file_list_for_each_entry   }

Functions
	DEFINE_STATIC_LGLOCK (files_lglock)
unsigned long	get_max_files (void)
	EXPORT_SYMBOL_GPL (get_max_files)
int	proc_nr_files (ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos)
struct file *	get_empty_filp (void)
struct file *	alloc_file (struct path *path, fmode_t mode, const struct file_operations *fop)
	EXPORT_SYMBOL (alloc_file)
void	flush_delayed_fput (void)
void	fput (struct file *file)
void	__fput_sync (struct file *file)
	EXPORT_SYMBOL (fput)
void	put_filp (struct file *file)
void	file_sb_list_add (struct file *file, struct super_block *sb)
void	file_sb_list_del (struct file *file)
void	mark_files_ro (struct super_block *sb)
void __init	files_init (unsigned long mempages)

Variables
struct files_stat_struct	files_stat

Macro Definition Documentation

#define do_file_list_for_each_entry	(		__sb,
			__file
	)

Value:

{                               \
	struct list_head *list;                    \
	list = &(sb)->s_files;                 \
    list_for_each_entry((__file), list, f_u.fu_list)

Definition at line 426 of file file_table.c.

#define while_file_list_for_each_entry   }

Definition at line 432 of file file_table.c.

Function Documentation

void __fput_sync

(

struct file *

file

)

Definition at line 330 of file file_table.c.

struct file* alloc_file ( struct path *  path, fmode_t  mode, const struct file_operations *  fop  )

read

alloc_file - allocate and initialize a 'struct file' : the vfsmount on which the file will reside : the dentry representing the new file : the mode with which the new file will be opened : the 'struct file_operations' for the new file

Use this instead of get_empty_filp() to get a new 'struct file'. Do so because of the same initialization pitfalls reasons listed for init_file(). This is a preferred interface to using init_file().

If all the callers of init_file() are eliminated, its code should be moved into this function.

Definition at line 170 of file file_table.c.

DEFINE_STATIC_LGLOCK

(

files_lglock

)

EXPORT_SYMBOL

(

alloc_file

)

EXPORT_SYMBOL

(

fput

)

EXPORT_SYMBOL_GPL

(

get_max_files

)

void file_sb_list_add	(	struct file *	file,
		struct super_block *	sb
	)

Definition at line 383 of file file_table.c.

void file_sb_list_del

(

struct file *

file

)

Definition at line 397 of file file_table.c.

void __init files_init

(

unsigned long

mempages

)

Definition at line 467 of file file_table.c.

void flush_delayed_fput

(

void

)

Definition at line 297 of file file_table.c.

void fput

(

struct file *

file

)

Definition at line 304 of file file_table.c.

struct file* get_empty_filp ( void  )

read

Definition at line 106 of file file_table.c.

unsigned long get_max_files

(

void

)

Definition at line 72 of file file_table.c.

void mark_files_ro

(

struct super_block *

sb

)

mark_files_ro - mark all files read-only : superblock in question

All files are marked read-only. We don't care about pending delete files so this should be used in 'force' mode only.

Definition at line 444 of file file_table.c.

int proc_nr_files	(	ctl_table *	table,
		int	write,
		void __user *	buffer,
		size_t *	lenp,
		loff_t *	ppos
	)

Definition at line 89 of file file_table.c.

void put_filp

(

struct file *

file

)

Definition at line 342 of file file_table.c.

Variable Documentation

struct files_stat_struct files_stat

Initial value:

= {
    .max_files = NR_FILE
}

Definition at line 35 of file file_table.c.