xv6/file.c File Reference

#include "types.h"
#include "defs.h"
#include "param.h"
#include "fs.h"
#include "file.h"
#include "spinlock.h"

Go to the source code of this file.

Functions
void	fileinit (void)
struct file *	filealloc (void)
struct file *	filedup (struct file *f)
void	fileclose (struct file *f)
int	filestat (struct file *f, struct stat *st)
int	fileread (struct file *f, char *addr, int n)
int	filewrite (struct file *f, char *addr, int n)
Variables
struct devsw	devsw [NDEV]
struct {
struct spinlock   lock
struct file   file [NFILE]
}	ftable

---

Function Documentation

struct file* filealloc

(

void

)

[read]

Definition at line 22 of file file.c.

References acquire(), ftable, NFILE, file::ref, and release().

Referenced by pipealloc(), and sys_open().

void fileclose

(

struct file *

f

)

Definition at line 52 of file file.c.

References acquire(), file::FD_INODE, file::FD_NONE, file::FD_PIPE, ftable, file::ip, iput(), panic(), file::pipe, pipeclose(), file::ref, release(), file::type, and file::writable.

Referenced by exit(), pipealloc(), sys_close(), sys_open(), and sys_pipe().

struct file* filedup

(

struct file *

f

)

[read]

Definition at line 40 of file file.c.

References acquire(), ftable, panic(), file::ref, and release().

Referenced by fork(), and sys_dup().

void fileinit

(

void

)

Definition at line 15 of file file.c.

References ftable, and initlock().

Referenced by mpmain().

int fileread	(	struct file *	f,
		char *	addr,
		int	n
	)

Definition at line 89 of file file.c.

References file::FD_INODE, file::FD_PIPE, ilock(), file::ip, iunlock(), file::off, panic(), file::pipe, piperead(), r, file::readable, readi(), and file::type.

Referenced by sys_read().

int filestat	(	struct file *	f,
		struct stat *	st
	)

Definition at line 76 of file file.c.

References file::FD_INODE, ilock(), file::ip, iunlock(), stati(), and file::type.

Referenced by sys_fstat().

int filewrite	(	struct file *	f,
		char *	addr,
		int	n
	)

Definition at line 109 of file file.c.

References file::FD_INODE, file::FD_PIPE, ilock(), file::ip, iunlock(), file::off, panic(), file::pipe, pipewrite(), r, file::type, file::writable, and writei().

Referenced by sys_write().

---

Variable Documentation

struct devsw devsw[NDEV]

Definition at line 8 of file file.c.

struct file file[NFILE]

Definition at line 11 of file file.c.

struct { ... } ftable

Referenced by filealloc(), fileclose(), filedup(), and fileinit().

struct spinlock lock

Definition at line 10 of file file.c.