2 * Copyright (C) 2008 Oracle. All rights reserved.
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.
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.
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.
19 #ifndef __BTRFS_COMPRESSION_
20 #define __BTRFS_COMPRESSION_
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
,
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
,
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
);
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