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 42 struct g_uzip_zlib { 43 uint32_t blksz; 44 struct g_uzip_dapi pub; 45 /* Zlib decoder structs */ 46 z_stream zs; 47 }; 48 49 static void *z_alloc(void *, u_int, u_int); 50 static void z_free(void *, void *); 51 static int g_uzip_zlib_rewind(struct g_uzip_dapi *, const char *); 52 53 static void 54 g_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 63 static int 64 g_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 84 static int 85 g_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 } 99 100 static int 101 z_compressBound(int len) 102 { 103 104 return (len + (len >> 12) + (len >> 14) + 11); 105 } 106 107 struct g_uzip_dapi * 108 g_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); 125 e1: 126 free(zp, M_GEOM_UZIP); 127 return (NULL); 128 } 129 130 static void * 131 z_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 } 139 140 static void 141 z_free(void *nil, void *ptr) 142 { 143 144 free(ptr, M_GEOM_UZIP); 145 } 146