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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 |