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 48