1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_DECOMP_H 27 #define _SYS_DECOMP_H 28 29 #ifdef __cplusplus 30 extern "C" { 31 #endif 32 33 #define CH_MAGIC_ZLIB 0x5a636d70 /* ZLIB compression */ 34 #define CH_MAGIC_GZIP 0x8B1F /* GZIP compression */ 35 36 #define CH_VERSION 1 37 38 #define CH_ALG_ZLIB 1 39 40 struct comphdr { 41 uint64_t ch_magic; 42 uint64_t ch_version; 43 uint64_t ch_algorithm; 44 uint64_t ch_fsize; 45 uint64_t ch_blksize; 46 uint64_t ch_blkmap[1]; 47 }; 48 49 #define ZMAXBUF(n) ((n) + ((n) / 1000) + 12) 50 51 #ifdef _KERNEL 52 53 struct dcnode { 54 struct vnode *dc_vp; 55 struct vnode *dc_subvp; 56 struct kmem_cache *dc_bufcache; 57 kmutex_t dc_lock; 58 struct dcnode *dc_hash; 59 struct dcnode *dc_lrunext; 60 struct dcnode *dc_lruprev; 61 struct comphdr *dc_hdr; 62 size_t dc_hdrsize; 63 size_t dc_zmax; 64 int dc_mapcnt; 65 }; 66 67 #define VTODC(vp) ((struct dcnode *)(vp)->v_data) 68 #define DCTOV(dp) ((dp)->dc_vp) 69 70 struct vnode *decompvp(struct vnode *, struct cred *, caller_context_t *); 71 72 #endif 73 74 #ifdef __cplusplus 75 } 76 #endif 77 #endif /* _SYS_DECOMP_H */ 78