1/*- 2 * Copyright (c) 2004 Max Khon 3 * Copyright (c) 2014 Juniper Networks, Inc. 4 * Copyright (c) 2006-2016 Maxim Sobolev <sobomax@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD$"); 31 32#include <sys/types.h> 33#include <sys/systm.h> 34#include <sys/malloc.h> 35 36#include <sys/zlib.h> 37 38#include <geom/uzip/g_uzip.h> 39#include <geom/uzip/g_uzip_dapi.h> 40#include <geom/uzip/g_uzip_zlib.h> 41 42struct g_uzip_zlib { 43 uint32_t blksz; 44 struct g_uzip_dapi pub; 45 /* Zlib decoder structs */ 46 z_stream zs; 47}; 48 49static void *z_alloc(void *, u_int, u_int); 50static void z_free(void *, void *); 51static int g_uzip_zlib_rewind(struct g_uzip_dapi *, const char *); 52 53static void 54g_uzip_zlib_free(struct g_uzip_dapi *zpp) 55{ 56 struct g_uzip_zlib *zp; 57 58 zp = (struct g_uzip_zlib *)zpp->pvt; 59 inflateEnd(&zp->zs); 60 free(zp, M_GEOM_UZIP); 61} 62 63static int 64g_uzip_zlib_decompress(struct g_uzip_dapi *zpp, const char *gp_name, void *ibp, 65 size_t ilen, void *obp) 66{ 67 int err; 68 struct g_uzip_zlib *zp; 69 70 zp = (struct g_uzip_zlib *)zpp->pvt; 71 72 zp->zs.next_in = ibp; 73 zp->zs.avail_in = ilen; 74 zp->zs.next_out = obp; 75 zp->zs.avail_out = zp->blksz; 76 77 err = (inflate(&zp->zs, Z_FINISH) != Z_STREAM_END) ? 1 : 0; 78 if (err != 0) { 79 printf("%s: UZIP(zlib) inflate() failed\n", gp_name); 80 } 81 return (err); 82} 83 84static int 85g_uzip_zlib_rewind(struct g_uzip_dapi *zpp, const char *gp_name) 86{ 87 int err; 88 struct g_uzip_zlib *zp; 89 90 zp = (struct g_uzip_zlib *)zpp->pvt; 91 92 err = 0; 93 if (inflateReset(&zp->zs) != Z_OK) { 94 printf("%s: UZIP(zlib) decoder reset failed\n", gp_name); 95 err = 1; 96 } 97 return (err); 98} 99 100static int 101z_compressBound(int len) 102{ 103 104 return (len + (len >> 12) + (len >> 14) + 11); 105} 106 107struct g_uzip_dapi * 108g_uzip_zlib_ctor(uint32_t blksz) 109{ 110 struct g_uzip_zlib *zp; 111 112 zp = malloc(sizeof(struct g_uzip_zlib), M_GEOM_UZIP, M_WAITOK); 113 zp->zs.zalloc = z_alloc; 114 zp->zs.zfree = z_free; 115 if (inflateInit(&zp->zs) != Z_OK) { 116 goto e1; 117 } 118 zp->blksz = blksz; 119 zp->pub.max_blen = z_compressBound(blksz); 120 zp->pub.decompress = &g_uzip_zlib_decompress; 121 zp->pub.free = &g_uzip_zlib_free; 122 zp->pub.rewind = &g_uzip_zlib_rewind; 123 zp->pub.pvt = (void *)zp; 124 return (&zp->pub); 125e1: 126 free(zp, M_GEOM_UZIP); 127 return (NULL); 128} 129 130static void * 131z_alloc(void *nil, u_int type, u_int size) 132{ 133 void *ptr; 134 135 ptr = malloc(type * size, M_GEOM_UZIP, M_NOWAIT); 136 137 return (ptr); 138} 139 140static void 141z_free(void *nil, void *ptr) 142{ 143 144 free(ptr, M_GEOM_UZIP); 145} 146