1 /*
2 BAREOS® - Backup Archiving REcovery Open Sourced
3
4 Copyright (C) 2000-2011 Free Software Foundation Europe e.V.
5 Copyright (C) 2011-2012 Planets Communications B.V.
6 Copyright (C) 2013-2019 Bareos GmbH & Co. KG
7
8 This program is Free Software; you can redistribute it and/or
9 modify it under the terms of version three of the GNU Affero General Public
10 License as published by the Free Software Foundation and included
11 in the file LICENSE.
12
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Affero General Public License for more details.
17
18 You should have received a copy of the GNU Affero General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 02110-1301, USA.
22 */
23 /*
24 * Kern Sibbald, March MM
25 * Extracted from other source files by Marco van Wieringen, June 2011
26 */
27 /**
28 * @file
29 * Functions to handle compression/decompression of data.
30 */
31
32 #include "include/bareos.h"
33 #include "filed/filed.h"
34 #include "filed/filed_globals.h"
35 #include "filed/jcr_private.h"
36
37 #if defined(HAVE_LIBZ)
38 # include <zlib.h>
39 #endif
40
41 #include "fastlz/fastlzlib.h"
42
43 namespace filedaemon {
44
45 /**
46 * For compression we enable all used compressors in the fileset.
47 */
AdjustCompressionBuffers(JobControlRecord * jcr)48 bool AdjustCompressionBuffers(JobControlRecord* jcr)
49 {
50 findFILESET* fileset = jcr->impl->ff->fileset;
51 uint32_t compress_buf_size = 0;
52
53 if (fileset) {
54 int i, j;
55
56 for (i = 0; i < fileset->include_list.size(); i++) {
57 findIncludeExcludeItem* incexe
58 = (findIncludeExcludeItem*)fileset->include_list.get(i);
59 for (j = 0; j < incexe->opts_list.size(); j++) {
60 findFOPTS* fo = (findFOPTS*)incexe->opts_list.get(j);
61
62 if (!SetupCompressionBuffers(jcr, me->compatible, fo->Compress_algo,
63 &compress_buf_size)) {
64 return false;
65 }
66 }
67 }
68
69 if (compress_buf_size > 0) {
70 jcr->compress.deflate_buffer = GetMemory(compress_buf_size);
71 jcr->compress.deflate_buffer_size = compress_buf_size;
72 }
73 }
74
75 return true;
76 }
77
78 /**
79 * For decompression we use the same decompression buffer for each algorithm.
80 */
AdjustDecompressionBuffers(JobControlRecord * jcr)81 bool AdjustDecompressionBuffers(JobControlRecord* jcr)
82 {
83 uint32_t decompress_buf_size;
84
85 SetupDecompressionBuffers(jcr, &decompress_buf_size);
86
87 if (decompress_buf_size > 0) {
88 jcr->compress.inflate_buffer = GetMemory(decompress_buf_size);
89 jcr->compress.inflate_buffer_size = decompress_buf_size;
90 }
91
92 return true;
93 }
94
SetupCompressionContext(b_ctx & bctx)95 bool SetupCompressionContext(b_ctx& bctx)
96 {
97 bool retval = false;
98
99 if (BitIsSet(FO_COMPRESS, bctx.ff_pkt->flags)) {
100 /*
101 * See if we need to be compatible with the old GZIP stream encoding.
102 */
103 if (!me->compatible || bctx.ff_pkt->Compress_algo != COMPRESS_GZIP) {
104 memset(&bctx.ch, 0, sizeof(comp_stream_header));
105
106 /*
107 * Calculate buffer offsets.
108 */
109 if (BitIsSet(FO_SPARSE, bctx.ff_pkt->flags)
110 || BitIsSet(FO_OFFSETS, bctx.ff_pkt->flags)) {
111 bctx.chead
112 = (uint8_t*)bctx.jcr->compress.deflate_buffer + OFFSET_FADDR_SIZE;
113 bctx.cbuf = (uint8_t*)bctx.jcr->compress.deflate_buffer
114 + OFFSET_FADDR_SIZE + sizeof(comp_stream_header);
115 bctx.max_compress_len
116 = bctx.jcr->compress.deflate_buffer_size
117 - (sizeof(comp_stream_header) + OFFSET_FADDR_SIZE);
118 } else {
119 bctx.chead = (uint8_t*)bctx.jcr->compress.deflate_buffer;
120 bctx.cbuf = (uint8_t*)bctx.jcr->compress.deflate_buffer
121 + sizeof(comp_stream_header);
122 bctx.max_compress_len = bctx.jcr->compress.deflate_buffer_size
123 - sizeof(comp_stream_header);
124 }
125
126 bctx.wbuf
127 = bctx.jcr->compress.deflate_buffer; /* compressed output here */
128 bctx.cipher_input
129 = (uint8_t*)
130 bctx.jcr->compress.deflate_buffer; /* encrypt compressed data */
131 bctx.ch.magic = bctx.ff_pkt->Compress_algo;
132 bctx.ch.version = COMP_HEAD_VERSION;
133 } else {
134 /*
135 * Calculate buffer offsets.
136 */
137 bctx.chead = NULL;
138 if (BitIsSet(FO_SPARSE, bctx.ff_pkt->flags)
139 || BitIsSet(FO_OFFSETS, bctx.ff_pkt->flags)) {
140 bctx.cbuf
141 = (uint8_t*)bctx.jcr->compress.deflate_buffer + OFFSET_FADDR_SIZE;
142 bctx.max_compress_len
143 = bctx.jcr->compress.deflate_buffer_size - OFFSET_FADDR_SIZE;
144 } else {
145 bctx.cbuf = (uint8_t*)bctx.jcr->compress.deflate_buffer;
146 bctx.max_compress_len = bctx.jcr->compress.deflate_buffer_size;
147 }
148 bctx.wbuf
149 = bctx.jcr->compress.deflate_buffer; /* compressed output here */
150 bctx.cipher_input
151 = (uint8_t*)
152 bctx.jcr->compress.deflate_buffer; /* encrypt compressed data */
153 }
154
155 /*
156 * Do compression specific actions and set the magic, header version and
157 * compression level.
158 */
159 switch (bctx.ff_pkt->Compress_algo) {
160 #if defined(HAVE_LIBZ)
161 case COMPRESS_GZIP: {
162 z_stream* pZlibStream;
163
164 /**
165 * Only change zlib parameters if there is no pending operation.
166 * This should never happen as deflateReset is called after each
167 * deflate.
168 */
169 pZlibStream = (z_stream*)bctx.jcr->compress.workset.pZLIB;
170 if (pZlibStream->total_in == 0) {
171 int zstat;
172
173 /*
174 * Set gzip compression level - must be done per file
175 */
176 if ((zstat = deflateParams(pZlibStream, bctx.ff_pkt->Compress_level,
177 Z_DEFAULT_STRATEGY))
178 != Z_OK) {
179 Jmsg(bctx.jcr, M_FATAL, 0,
180 _("Compression deflateParams error: %d\n"), zstat);
181 bctx.jcr->setJobStatus(JS_ErrorTerminated);
182 goto bail_out;
183 }
184 }
185 bctx.ch.level = bctx.ff_pkt->Compress_level;
186 break;
187 }
188 #endif
189 #if defined(HAVE_LZO)
190 case COMPRESS_LZO1X:
191 break;
192 #endif
193 case COMPRESS_FZFZ:
194 case COMPRESS_FZ4L:
195 case COMPRESS_FZ4H: {
196 int zstat;
197 zfast_stream* pZfastStream;
198 zfast_stream_compressor compressor = COMPRESSOR_FASTLZ;
199
200 /**
201 * Only change fastlz parameters if there is no pending operation.
202 * This should never happen as fastlzlibCompressReset is called after
203 * each fastlzlibCompress.
204 */
205 pZfastStream = (zfast_stream*)bctx.jcr->compress.workset.pZFAST;
206 if (pZfastStream->total_in == 0) {
207 switch (bctx.ff_pkt->Compress_algo) {
208 case COMPRESS_FZ4L:
209 case COMPRESS_FZ4H:
210 compressor = COMPRESSOR_LZ4;
211 break;
212 }
213
214 if ((zstat = fastlzlibSetCompressor(pZfastStream, compressor))
215 != Z_OK) {
216 Jmsg(bctx.jcr, M_FATAL, 0,
217 _("Compression fastlzlibSetCompressor error: %d\n"), zstat);
218 bctx.jcr->setJobStatus(JS_ErrorTerminated);
219 goto bail_out;
220 }
221 }
222 bctx.ch.level = bctx.ff_pkt->Compress_level;
223 break;
224 }
225 default:
226 break;
227 }
228 }
229
230 retval = true;
231
232 bail_out:
233 return retval;
234 }
235
236 } /* namespace filedaemon */
237