[net-next-2.6.git] / fs / btrfs / compression.h

/*
 * Copyright (C) 2008 Oracle.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License v2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 */

#ifndef __BTRFS_COMPRESSION_
#define __BTRFS_COMPRESSION_

int btrfs_zlib_decompress(unsigned char *data_in,
			  struct page *dest_page,
			  unsigned long start_byte,
			  size_t srclen, size_t destlen);
int btrfs_zlib_compress_pages(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_zlib_decompress_biovec(struct page **pages_in,
			      u64 disk_start,
			      struct bio_vec *bvec,
			      int vcnt,
			      size_t srclen);
void btrfs_zlib_exit(void);
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);
#endif
Commit	Line	Data
c8b97818 CM	1	/*
	2	* Copyright (C) 2008 Oracle. All rights reserved.
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public
	6	* License v2 as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	11	* General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public
	14	* License along with this program; if not, write to the
	15	* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	16	* Boston, MA 021110-1307, USA.
	17	*/
	18
	19	#ifndef __BTRFS_COMPRESSION_
	20	#define __BTRFS_COMPRESSION_
	21
	22	int btrfs_zlib_decompress(unsigned char *data_in,
	23	struct page *dest_page,
	24	unsigned long start_byte,
	25	size_t srclen, size_t destlen);
	26	int btrfs_zlib_compress_pages(struct address_space *mapping,
	27	u64 start, unsigned long len,
	28	struct page **pages,
	29	unsigned long nr_dest_pages,
	30	unsigned long *out_pages,
	31	unsigned long *total_in,
	32	unsigned long *total_out,
	33	unsigned long max_out);
	34	int btrfs_zlib_decompress_biovec(struct page **pages_in,
	35	u64 disk_start,
	36	struct bio_vec *bvec,
	37	int vcnt,
	38	size_t srclen);
	39	void btrfs_zlib_exit(void);
	40	int btrfs_submit_compressed_write(struct inode *inode, u64 start,
	41	unsigned long len, u64 disk_start,
	42	unsigned long compressed_len,
	43	struct page **compressed_pages,
	44	unsigned long nr_pages);
	45	int btrfs_submit_compressed_read(struct inode inode, struct bio bio,
	46	int mirror_num, unsigned long bio_flags);
	47	#endif