compression.c File Reference

#include <linux/kernel.h>
#include <linux/bio.h>
#include <linux/buffer_head.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/pagemap.h>
#include <linux/highmem.h>
#include <linux/time.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/backing-dev.h>
#include <linux/mpage.h>
#include <linux/swap.h>
#include <linux/writeback.h>
#include <linux/bit_spinlock.h>
#include <linux/slab.h>
#include "compat.h"
#include "ctree.h"
#include "disk-io.h"
#include "transaction.h"
#include "btrfs_inode.h"
#include "volumes.h"
#include "ordered-data.h"
#include "compression.h"
#include "extent_io.h"
#include "extent_map.h"

Go to the source code of this file.

Data Structures
struct	compressed_bio

Functions
int	btrfs_submit_compressed_write (struct inode *inode, u64 start, unsigned long len, u64 disk_start, unsigned long compressed_len, struct page **compressed_pages, unsigned long nr_pages)
int	btrfs_submit_compressed_read (struct inode *inode, struct bio *bio, int mirror_num, unsigned long bio_flags)
void __init	btrfs_init_compress (void)
int	btrfs_compress_pages (int type, struct address_space *mapping, u64 start, unsigned long len, struct page **pages, unsigned long nr_dest_pages, unsigned long *out_pages, unsigned long *total_in, unsigned long *total_out, unsigned long max_out)
int	btrfs_decompress_biovec (int type, struct page **pages_in, u64 disk_start, struct bio_vec *bvec, int vcnt, size_t srclen)
int	btrfs_decompress (int type, unsigned char *data_in, struct page *dest_page, unsigned long start_byte, size_t srclen, size_t destlen)
void	btrfs_exit_compress (void)
int	btrfs_decompress_buf2page (char *buf, unsigned long buf_start, unsigned long total_out, u64 disk_start, struct bio_vec *bvec, int vcnt, unsigned long *pg_index, unsigned long *pg_offset)

Variables
struct btrfs_compress_op *	btrfs_compress_op []

Function Documentation

int btrfs_compress_pages	(	int	type,
		struct address_space *	mapping,
		u64	start,
		unsigned long	len,
		struct page **	pages,
		unsigned long	nr_dest_pages,
		unsigned long *	out_pages,
		unsigned long *	total_in,
		unsigned long *	total_out,
		unsigned long	max_out
	)

Definition at line 870 of file compression.c.

int btrfs_decompress	(	int	type,
		unsigned char *	data_in,
		struct page *	dest_page,
		unsigned long	start_byte,
		size_t	srclen,
		size_t	destlen
	)

Definition at line 933 of file compression.c.

int btrfs_decompress_biovec	(	int	type,
		struct page **	pages_in,
		u64	disk_start,
		struct bio_vec *	bvec,
		int	vcnt,
		size_t	srclen
	)

Definition at line 911 of file compression.c.

int btrfs_decompress_buf2page	(	char *	buf,
		unsigned long	buf_start,
		unsigned long	total_out,
		u64	disk_start,
		struct bio_vec *	bvec,
		int	vcnt,
		unsigned long *	pg_index,
		unsigned long *	pg_offset
	)

Definition at line 963 of file compression.c.

void btrfs_exit_compress

(

void

)

Definition at line 951 of file compression.c.

void __init btrfs_init_compress

(

void

)

Definition at line 745 of file compression.c.

int btrfs_submit_compressed_read	(	struct inode *	inode,
		struct bio *	bio,
		int	mirror_num,
		unsigned long	bio_flags
	)

Definition at line 561 of file compression.c.

int btrfs_submit_compressed_write	(	struct inode *	inode,
		u64	start,
		unsigned long	len,
		u64	disk_start,
		unsigned long	compressed_len,
		struct page **	compressed_pages,
		unsigned long	nr_pages
	)

Definition at line 325 of file compression.c.

Variable Documentation

struct btrfs_compress_op* btrfs_compress_op[]

Initial value:

= {
    &btrfs_zlib_compress,
    &btrfs_lzo_compress,
}

Definition at line 740 of file compression.c.