Linux 2.6.32.17
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / btrfs / compression.h
blob421f5b4aa7151d4704256222de8e342e8899259d
1 /*
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,
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