libf2fs_io.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include <stdbool.h>
#include <assert.h>
#include <inttypes.h>
#include "f2fs_fs.h"

Include dependency graph for libf2fs_io.c:

Macros
#define	F_LINUX_SPECIFIC_BASE   1024
#define	F_SET_RW_HINT   (F_LINUX_SPECIFIC_BASE + 12)
#define	MIN_NUM_CACHE_ENTRY   1024L
#define	MAX_MAX_HASH_COLLISION   16
#define	MAX_CHUNK_SIZE   (1 * 1024 * 1024 * 1024ULL)
#define	MAX_CHUNK_COUNT   (MAX_CHUNK_SIZE / F2FS_BLKSIZE)

Functions
static int	__get_device_fd (__u64 *offset)
static void	dcache_print_statistics (void)
void	dcache_release (void)
static int	dcache_alloc_all (long n)
static void	dcache_relocate_init (void)
void	dcache_init (void)
static char *	dcache_addr (long entry)
static long	dcache_relocate (long entry, int n)
static long	dcache_find (__u64 blk)
static int	dcache_io_read (long entry, __u64 offset, off_t blk)
static int	dcache_update_rw (void *buf, __u64 offset, size_t byte_count, bool is_write)
int	dcache_update_cache (void *buf, __u64 offset, size_t count)
int	dcache_read (void *buf, __u64 offset, size_t count)
int	dev_read_version (void *buf, __u64 offset, size_t len)
static int	sparse_read_blk (__u64 UNUSED(block), int UNUSED(count), void *UNUSED(buf))
static int	sparse_write_blk (__u64 UNUSED(block), int UNUSED(count), const void *UNUSED(buf))
static int	sparse_write_zeroed_blk (__u64 UNUSED(block), int UNUSED(count))
int	dev_read (void *buf, __u64 offset, size_t len)
int	dev_readahead (__u64 offset, size_t UNUSED(len))
enum rw_hint	f2fs_io_type_to_rw_hint (int seg_type)
static int	__dev_write (void *buf, __u64 offset, size_t len, enum rw_hint whint)
int	dev_write (void *buf, __u64 offset, size_t len, enum rw_hint whint)
int	dev_write_block (void *buf, __u64 blk_addr, enum rw_hint whint)
int	dev_write_dump (void *buf, __u64 offset, size_t len)
int	dev_write_symlink (char *buf, size_t len)
int	dev_fill (void *buf, __u64 offset, size_t len, enum rw_hint whint)
int	dev_fill_block (void *buf, __u64 blk_addr, enum rw_hint whint)
int	dev_read_block (void *buf, __u64 blk_addr)
int	dev_reada_block (__u64 blk_addr)
int	f2fs_fsync_device (void)
int	f2fs_init_sparse_file (void)
void	f2fs_release_sparse_resource (void)
int	f2fs_finalize_device (void)

Variables
struct f2fs_configuration	c
static bool *	dcache_valid
static off_t *	dcache_blk
static uint64_t *	dcache_lastused
static char *	dcache_buf
static uint64_t	dcache_usetick
static uint64_t	dcache_raccess
static uint64_t	dcache_rhit
static uint64_t	dcache_rmiss
static uint64_t	dcache_rreplace
static bool	dcache_exit_registered = false
static dev_cache_config_t	dcache_config = {0, 16, 1}
static bool	dcache_initialized = false
static long	dcache_relocate_offset0 []
static int	dcache_relocate_offset [16]

Macro Definition Documentation

F_LINUX_SPECIFIC_BASE

#define F_LINUX_SPECIFIC_BASE   1024

libf2fs.c

Copyright (c) 2013 Samsung Electronics Co., Ltd. http://www.samsung.com/ Copyright (c) 2019 Google Inc. http://www.google.com/ Copyright (c) 2020 Google Inc. Robin Hsu robin.nosp@m.hsu@.nosp@m.googl.nosp@m.e.co.nosp@m.m : add quick-buffer for sload compression support

Dual licensed under the GPL or LGPL version 2 licenses.

F_SET_RW_HINT

#define F_SET_RW_HINT   (F_LINUX_SPECIFIC_BASE + 12)

MAX_CHUNK_COUNT

#define MAX_CHUNK_COUNT   (MAX_CHUNK_SIZE / F2FS_BLKSIZE)

MAX_CHUNK_SIZE

#define MAX_CHUNK_SIZE   (1 * 1024 * 1024 * 1024ULL)

MAX_MAX_HASH_COLLISION

#define MAX_MAX_HASH_COLLISION   16

MIN_NUM_CACHE_ENTRY

#define MIN_NUM_CACHE_ENTRY   1024L

Function Documentation

__dev_write()

static int __dev_write ( void *  buf, __u64  offset, size_t  len, enum rw_hint  whint  )

static

__get_device_fd()

static int __get_device_fd ( __u64 *  offset )

static

dcache_addr()

static char * dcache_addr ( long  entry )

inlinestatic

dcache_alloc_all()

static int dcache_alloc_all ( long  n )

static

dcache_find()

static long dcache_find ( __u64  blk )

static

dcache_init()

void dcache_init

(

void

)

dcache_io_read()

static int dcache_io_read ( long  entry, __u64  offset, off_t  blk  )

static

dcache_print_statistics()

static void dcache_print_statistics ( void  )

static

dcache_read()

int dcache_read	(	void *	buf,
		__u64	offset,
		size_t	count
	)

dcache_release()

void dcache_release

(

void

)

dcache_relocate()

static long dcache_relocate ( long  entry, int  n  )

inlinestatic

dcache_relocate_init()

static void dcache_relocate_init ( void  )

static

dcache_update_cache()

int dcache_update_cache	(	void *	buf,
		__u64	offset,
		size_t	count
	)

dcache_update_rw()

static int dcache_update_rw ( void *  buf, __u64  offset, size_t  byte_count, bool  is_write  )

static

dev_fill()

int dev_fill	(	void *	buf,
		__u64	offset,
		size_t	len,
		enum rw_hint	whint
	)

dev_fill_block()

int dev_fill_block	(	void *	buf,
		__u64	blk_addr,
		enum rw_hint	whint
	)

dev_read()

int dev_read	(	void *	buf,
		__u64	offset,
		size_t	len
	)

dev_read_block()

int dev_read_block	(	void *	buf,
		__u64	blk_addr
	)

dev_read_version()

int dev_read_version	(	void *	buf,
		__u64	offset,
		size_t	len
	)

dev_reada_block()

int dev_reada_block

(

__u64

blk_addr

)

dev_readahead()

int dev_readahead	(	__u64	offset,
		size_t	UNUSEDlen
	)

dev_write()

int dev_write	(	void *	buf,
		__u64	offset,
		size_t	len,
		enum rw_hint	whint
	)

dev_write_block()

int dev_write_block	(	void *	buf,
		__u64	blk_addr,
		enum rw_hint	whint
	)

dev_write_dump()

int dev_write_dump	(	void *	buf,
		__u64	offset,
		size_t	len
	)

dev_write_symlink()

int dev_write_symlink	(	char *	buf,
		size_t	len
	)

f2fs_finalize_device()

int f2fs_finalize_device

(

void

)

f2fs_fsync_device()

int f2fs_fsync_device

(

void

)

f2fs_init_sparse_file()

int f2fs_init_sparse_file

(

void

)

f2fs_io_type_to_rw_hint()

enum rw_hint f2fs_io_type_to_rw_hint

(

int

seg_type

)

f2fs_release_sparse_resource()

void f2fs_release_sparse_resource

(

void

)

sparse_read_blk()

static int sparse_read_blk ( __u64   UNUSEDblock, int   UNUSEDcount, void *  UNUSEDbuf  )

static

sparse_write_blk()

static int sparse_write_blk ( __u64   UNUSEDblock, int   UNUSEDcount, const void *  UNUSEDbuf  )

static

sparse_write_zeroed_blk()

static int sparse_write_zeroed_blk ( __u64   UNUSEDblock, int   UNUSEDcount  )

static

Variable Documentation

c

struct f2fs_configuration c

f2fs_format.c

Copyright (c) 2012 Samsung Electronics Co., Ltd. http://www.samsung.com/

Dual licensed under the GPL or LGPL version 2 licenses.

dcache_blk

off_t* dcache_blk

static

dcache_buf

char* dcache_buf

static

dcache_config

dev_cache_config_t dcache_config = {0, 16, 1}

static

dcache_exit_registered

bool dcache_exit_registered = false

static

dcache_initialized

bool dcache_initialized = false

static

dcache_lastused

uint64_t* dcache_lastused

static

dcache_raccess

uint64_t dcache_raccess

static

dcache_relocate_offset

int dcache_relocate_offset[16]

static

dcache_relocate_offset0

long dcache_relocate_offset0[]

static

Initial value:

= {
    20, -20, 40, -40, 80, -80, 160, -160,
    320, -320, 640, -640, 1280, -1280, 2560, -2560,
}

dcache_rhit

uint64_t dcache_rhit

static

dcache_rmiss

uint64_t dcache_rmiss

static

dcache_rreplace

uint64_t dcache_rreplace

static

dcache_usetick

uint64_t dcache_usetick

static

dcache_valid

bool* dcache_valid

static