2 This file is part of systemd
4 Copyright 2014 Ronny Chevalier
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
24 #include "alloc-util.h"
29 #include "random-util.h"
35 # define XZ_OK -EPROTONOSUPPORT
41 # define LZ4_OK -EPROTONOSUPPORT
44 typedef int (compress_blob_t
)(const void *src
, uint64_t src_size
,
45 void *dst
, size_t dst_alloc_size
, size_t *dst_size
);
46 typedef int (decompress_blob_t
)(const void *src
, uint64_t src_size
,
47 void **dst
, size_t *dst_alloc_size
,
48 size_t* dst_size
, size_t dst_max
);
49 typedef int (decompress_sw_t
)(const void *src
, uint64_t src_size
,
50 void **buffer
, size_t *buffer_size
,
51 const void *prefix
, size_t prefix_len
,
54 typedef int (compress_stream_t
)(int fdf
, int fdt
, uint64_t max_bytes
);
55 typedef int (decompress_stream_t
)(int fdf
, int fdt
, uint64_t max_size
);
57 static void test_compress_decompress(int compression
,
58 compress_blob_t compress
,
59 decompress_blob_t decompress
,
64 size_t csize
, usize
= 0;
65 _cleanup_free_
char *decompressed
= NULL
;
68 log_info("/* testing %s %s blob compression/decompression */",
69 object_compressed_to_string(compression
), data
);
71 r
= compress(data
, data_len
, compressed
, sizeof(compressed
), &csize
);
73 log_info_errno(r
, "compression failed: %m");
77 r
= decompress(compressed
, csize
,
78 (void **) &decompressed
, &usize
, &csize
, 0);
80 assert_se(decompressed
);
81 assert_se(memcmp(decompressed
, data
, data_len
) == 0);
84 r
= decompress("garbage", 7,
85 (void **) &decompressed
, &usize
, &csize
, 0);
88 /* make sure to have the minimal lz4 compressed size */
89 r
= decompress("00000000\1g", 9,
90 (void **) &decompressed
, &usize
, &csize
, 0);
93 r
= decompress("\100000000g", 9,
94 (void **) &decompressed
, &usize
, &csize
, 0);
97 memzero(decompressed
, usize
);
100 static void test_decompress_startswith(int compression
,
101 compress_blob_t compress
,
102 decompress_sw_t decompress_sw
,
108 _cleanup_free_
char *compressed1
= NULL
, *compressed2
= NULL
, *decompressed
= NULL
;
109 size_t csize
, usize
= 0, len
;
112 log_info("/* testing decompress_startswith with %s on %.20s text*/",
113 object_compressed_to_string(compression
), data
);
115 #define BUFSIZE_1 512
116 #define BUFSIZE_2 20000
118 compressed
= compressed1
= malloc(BUFSIZE_1
);
119 assert_se(compressed1
);
120 r
= compress(data
, data_len
, compressed
, BUFSIZE_1
, &csize
);
122 log_info_errno(r
, "compression failed: %m");
125 compressed
= compressed2
= malloc(BUFSIZE_2
);
126 assert_se(compressed2
);
127 r
= compress(data
, data_len
, compressed
, BUFSIZE_2
, &csize
);
134 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, data
, len
, '\0');
136 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, data
, len
, 'w');
138 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, "barbarbar", 9, ' ');
140 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, data
, len
- 1, data
[len
-1]);
142 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, data
, len
- 1, 'w');
144 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, data
, len
, '\0');
148 static void test_compress_stream(int compression
,
150 compress_stream_t compress
,
151 decompress_stream_t decompress
,
152 const char *srcfile
) {
154 _cleanup_close_
int src
= -1, dst
= -1, dst2
= -1;
155 char pattern
[] = "/tmp/systemd-test.compressed.XXXXXX",
156 pattern2
[] = "/tmp/systemd-test.compressed.XXXXXX";
158 _cleanup_free_
char *cmd
= NULL
, *cmd2
;
161 log_debug("/* testing %s compression */",
162 object_compressed_to_string(compression
));
164 log_debug("/* create source from %s */", srcfile
);
166 assert_se((src
= open(srcfile
, O_RDONLY
|O_CLOEXEC
)) >= 0);
168 log_debug("/* test compression */");
170 assert_se((dst
= mkostemp_safe(pattern
)) >= 0);
172 assert_se(compress(src
, dst
, -1) == 0);
175 assert_se(asprintf(&cmd
, "%s %s | diff %s -", cat
, pattern
, srcfile
) > 0);
176 assert_se(system(cmd
) == 0);
179 log_debug("/* test decompression */");
181 assert_se((dst2
= mkostemp_safe(pattern2
)) >= 0);
183 assert_se(stat(srcfile
, &st
) == 0);
185 assert_se(lseek(dst
, 0, SEEK_SET
) == 0);
186 r
= decompress(dst
, dst2
, st
.st_size
);
189 assert_se(asprintf(&cmd2
, "diff %s %s", srcfile
, pattern2
) > 0);
190 assert_se(system(cmd2
) == 0);
192 log_debug("/* test faulty decompression */");
194 assert_se(lseek(dst
, 1, SEEK_SET
) == 1);
195 r
= decompress(dst
, dst2
, st
.st_size
);
196 assert_se(r
== -EBADMSG
|| r
== 0);
198 assert_se(lseek(dst
, 0, SEEK_SET
) == 0);
199 assert_se(lseek(dst2
, 0, SEEK_SET
) == 0);
200 r
= decompress(dst
, dst2
, st
.st_size
- 1);
201 assert_se(r
== -EFBIG
);
203 assert_se(unlink(pattern
) == 0);
204 assert_se(unlink(pattern2
) == 0);
208 static void test_lz4_decompress_partial(void) {
210 size_t buf_size
= sizeof(buf
), compressed
;
212 _cleanup_free_
char *huge
= NULL
;
214 #define HUGE_SIZE (4096*1024)
215 huge
= malloc(HUGE_SIZE
);
216 memset(huge
, 'x', HUGE_SIZE
);
217 memcpy(huge
, "HUGE=", 5);
219 #if LZ4_VERSION_NUMBER >= 10700
220 r
= LZ4_compress_default(huge
, buf
, HUGE_SIZE
, buf_size
);
222 r
= LZ4_compress_limitedOutput(huge
, buf
, HUGE_SIZE
, buf_size
);
226 log_info("Compressed %i → %zu", HUGE_SIZE
, compressed
);
228 r
= LZ4_decompress_safe(buf
, huge
, r
, HUGE_SIZE
);
230 log_info("Decompressed → %i", r
);
232 r
= LZ4_decompress_safe_partial(buf
, huge
,
236 log_info("Decompressed partial %i/%i → %i", 12, HUGE_SIZE
, r
);
238 /* We expect this to fail, because that's how current lz4 works. If this
239 * call succeeds, then lz4 has been fixed, and we need to change our code.
241 r
= LZ4_decompress_safe_partial(buf
, huge
,
245 log_info("Decompressed partial %i/%i → %i", 12, HUGE_SIZE
-1, r
);
249 int main(int argc
, char *argv
[]) {
251 "text\0foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"
252 "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF";
254 /* The file to test compression on can be specified as the first argument */
255 const char *srcfile
= argc
> 1 ? argv
[1] : argv
[0];
257 char data
[512] = "random\0";
259 char huge
[4096*1024];
260 memset(huge
, 'x', sizeof(huge
));
261 memcpy(huge
, "HUGE=", 5);
264 log_set_max_level(LOG_DEBUG
);
266 random_bytes(data
+ 7, sizeof(data
) - 7);
269 test_compress_decompress(OBJECT_COMPRESSED_XZ
, compress_blob_xz
, decompress_blob_xz
,
270 text
, sizeof(text
), false);
271 test_compress_decompress(OBJECT_COMPRESSED_XZ
, compress_blob_xz
, decompress_blob_xz
,
272 data
, sizeof(data
), true);
274 test_decompress_startswith(OBJECT_COMPRESSED_XZ
,
275 compress_blob_xz
, decompress_startswith_xz
,
276 text
, sizeof(text
), false);
277 test_decompress_startswith(OBJECT_COMPRESSED_XZ
,
278 compress_blob_xz
, decompress_startswith_xz
,
279 data
, sizeof(data
), true);
280 test_decompress_startswith(OBJECT_COMPRESSED_XZ
,
281 compress_blob_xz
, decompress_startswith_xz
,
282 huge
, sizeof(huge
), true);
284 test_compress_stream(OBJECT_COMPRESSED_XZ
, "xzcat",
285 compress_stream_xz
, decompress_stream_xz
, srcfile
);
287 log_info("/* XZ test skipped */");
291 test_compress_decompress(OBJECT_COMPRESSED_LZ4
, compress_blob_lz4
, decompress_blob_lz4
,
292 text
, sizeof(text
), false);
293 test_compress_decompress(OBJECT_COMPRESSED_LZ4
, compress_blob_lz4
, decompress_blob_lz4
,
294 data
, sizeof(data
), true);
296 test_decompress_startswith(OBJECT_COMPRESSED_LZ4
,
297 compress_blob_lz4
, decompress_startswith_lz4
,
298 text
, sizeof(text
), false);
299 test_decompress_startswith(OBJECT_COMPRESSED_LZ4
,
300 compress_blob_lz4
, decompress_startswith_lz4
,
301 data
, sizeof(data
), true);
302 test_decompress_startswith(OBJECT_COMPRESSED_LZ4
,
303 compress_blob_lz4
, decompress_startswith_lz4
,
304 huge
, sizeof(huge
), true);
306 test_compress_stream(OBJECT_COMPRESSED_LZ4
, "lz4cat",
307 compress_stream_lz4
, decompress_stream_lz4
, srcfile
);
309 test_lz4_decompress_partial();
311 log_info("/* LZ4 test skipped */");