1 /* SPDX-License-Identifier: LGPL-2.1+ */
7 #include "alloc-util.h"
13 #include "path-util.h"
14 #include "random-util.h"
21 # define XZ_OK -EPROTONOSUPPORT
27 # define LZ4_OK -EPROTONOSUPPORT
30 typedef int (compress_blob_t
)(const void *src
, uint64_t src_size
,
31 void *dst
, size_t dst_alloc_size
, size_t *dst_size
);
32 typedef int (decompress_blob_t
)(const void *src
, uint64_t src_size
,
33 void **dst
, size_t *dst_alloc_size
,
34 size_t* dst_size
, size_t dst_max
);
35 typedef int (decompress_sw_t
)(const void *src
, uint64_t src_size
,
36 void **buffer
, size_t *buffer_size
,
37 const void *prefix
, size_t prefix_len
,
40 typedef int (compress_stream_t
)(int fdf
, int fdt
, uint64_t max_bytes
);
41 typedef int (decompress_stream_t
)(int fdf
, int fdt
, uint64_t max_size
);
43 #if HAVE_XZ || HAVE_LZ4
44 static void test_compress_decompress(int compression
,
45 compress_blob_t compress
,
46 decompress_blob_t decompress
,
51 size_t csize
, usize
= 0;
52 _cleanup_free_
char *decompressed
= NULL
;
55 log_info("/* testing %s %s blob compression/decompression */",
56 object_compressed_to_string(compression
), data
);
58 r
= compress(data
, data_len
, compressed
, sizeof(compressed
), &csize
);
60 log_info_errno(r
, "compression failed: %m");
64 r
= decompress(compressed
, csize
,
65 (void **) &decompressed
, &usize
, &csize
, 0);
67 assert_se(decompressed
);
68 assert_se(memcmp(decompressed
, data
, data_len
) == 0);
71 r
= decompress("garbage", 7,
72 (void **) &decompressed
, &usize
, &csize
, 0);
75 /* make sure to have the minimal lz4 compressed size */
76 r
= decompress("00000000\1g", 9,
77 (void **) &decompressed
, &usize
, &csize
, 0);
80 r
= decompress("\100000000g", 9,
81 (void **) &decompressed
, &usize
, &csize
, 0);
84 memzero(decompressed
, usize
);
87 static void test_decompress_startswith(int compression
,
88 compress_blob_t compress
,
89 decompress_sw_t decompress_sw
,
95 _cleanup_free_
char *compressed1
= NULL
, *compressed2
= NULL
, *decompressed
= NULL
;
96 size_t csize
, usize
= 0, len
;
99 log_info("/* testing decompress_startswith with %s on %.20s text */",
100 object_compressed_to_string(compression
), data
);
102 #define BUFSIZE_1 512
103 #define BUFSIZE_2 20000
105 compressed
= compressed1
= malloc(BUFSIZE_1
);
106 assert_se(compressed1
);
107 r
= compress(data
, data_len
, compressed
, BUFSIZE_1
, &csize
);
109 log_info_errno(r
, "compression failed: %m");
112 compressed
= compressed2
= malloc(BUFSIZE_2
);
113 assert_se(compressed2
);
114 r
= compress(data
, data_len
, compressed
, BUFSIZE_2
, &csize
);
121 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, data
, len
, '\0');
123 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, data
, len
, 'w');
125 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, "barbarbar", 9, ' ');
127 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, data
, len
- 1, data
[len
-1]);
129 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, data
, len
- 1, 'w');
131 r
= decompress_sw(compressed
, csize
, (void **) &decompressed
, &usize
, data
, len
, '\0');
135 static void test_compress_stream(int compression
,
137 compress_stream_t compress
,
138 decompress_stream_t decompress
,
139 const char *srcfile
) {
141 _cleanup_close_
int src
= -1, dst
= -1, dst2
= -1;
142 _cleanup_(unlink_tempfilep
) char
143 pattern
[] = "/tmp/systemd-test.compressed.XXXXXX",
144 pattern2
[] = "/tmp/systemd-test.compressed.XXXXXX";
146 _cleanup_free_
char *cmd
= NULL
, *cmd2
= NULL
;
149 r
= find_binary(cat
, NULL
);
151 log_error_errno(r
, "Skipping %s, could not find %s binary: %m", __func__
, cat
);
155 log_debug("/* testing %s compression */",
156 object_compressed_to_string(compression
));
158 log_debug("/* create source from %s */", srcfile
);
160 assert_se((src
= open(srcfile
, O_RDONLY
|O_CLOEXEC
)) >= 0);
162 log_debug("/* test compression */");
164 assert_se((dst
= mkostemp_safe(pattern
)) >= 0);
166 assert_se(compress(src
, dst
, -1) == 0);
169 assert_se(asprintf(&cmd
, "%s %s | diff %s -", cat
, pattern
, srcfile
) > 0);
170 assert_se(system(cmd
) == 0);
173 log_debug("/* test decompression */");
175 assert_se((dst2
= mkostemp_safe(pattern2
)) >= 0);
177 assert_se(stat(srcfile
, &st
) == 0);
179 assert_se(lseek(dst
, 0, SEEK_SET
) == 0);
180 r
= decompress(dst
, dst2
, st
.st_size
);
183 assert_se(asprintf(&cmd2
, "diff %s %s", srcfile
, pattern2
) > 0);
184 assert_se(system(cmd2
) == 0);
186 log_debug("/* test faulty decompression */");
188 assert_se(lseek(dst
, 1, SEEK_SET
) == 1);
189 r
= decompress(dst
, dst2
, st
.st_size
);
190 assert_se(IN_SET(r
, 0, -EBADMSG
));
192 assert_se(lseek(dst
, 0, SEEK_SET
) == 0);
193 assert_se(lseek(dst2
, 0, SEEK_SET
) == 0);
194 r
= decompress(dst
, dst2
, st
.st_size
- 1);
195 assert_se(r
== -EFBIG
);
200 static void test_lz4_decompress_partial(void) {
202 size_t buf_size
= sizeof(buf
), compressed
;
204 _cleanup_free_
char *huge
= NULL
;
206 #define HUGE_SIZE (4096*1024)
207 huge
= malloc(HUGE_SIZE
);
208 memset(huge
, 'x', HUGE_SIZE
);
209 memcpy(huge
, "HUGE=", 5);
211 #if LZ4_VERSION_NUMBER >= 10700
212 r
= LZ4_compress_default(huge
, buf
, HUGE_SIZE
, buf_size
);
214 r
= LZ4_compress_limitedOutput(huge
, buf
, HUGE_SIZE
, buf_size
);
218 log_info("Compressed %i → %zu", HUGE_SIZE
, compressed
);
220 r
= LZ4_decompress_safe(buf
, huge
, r
, HUGE_SIZE
);
222 log_info("Decompressed → %i", r
);
224 r
= LZ4_decompress_safe_partial(buf
, huge
,
228 log_info("Decompressed partial %i/%i → %i", 12, HUGE_SIZE
, r
);
230 /* We expect this to fail, because that's how current lz4 works. If this
231 * call succeeds, then lz4 has been fixed, and we need to change our code.
233 r
= LZ4_decompress_safe_partial(buf
, huge
,
237 log_info("Decompressed partial %i/%i → %i", 12, HUGE_SIZE
-1, r
);
241 int main(int argc
, char *argv
[]) {
242 #if HAVE_XZ || HAVE_LZ4
244 "text\0foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"
245 "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF";
247 /* The file to test compression on can be specified as the first argument */
248 const char *srcfile
= argc
> 1 ? argv
[1] : argv
[0];
250 char data
[512] = "random\0";
252 char huge
[4096*1024];
253 memset(huge
, 'x', sizeof(huge
));
254 memcpy(huge
, "HUGE=", 5);
257 test_setup_logging(LOG_DEBUG
);
259 random_bytes(data
+ 7, sizeof(data
) - 7);
262 test_compress_decompress(OBJECT_COMPRESSED_XZ
, compress_blob_xz
, decompress_blob_xz
,
263 text
, sizeof(text
), false);
264 test_compress_decompress(OBJECT_COMPRESSED_XZ
, compress_blob_xz
, decompress_blob_xz
,
265 data
, sizeof(data
), true);
267 test_decompress_startswith(OBJECT_COMPRESSED_XZ
,
268 compress_blob_xz
, decompress_startswith_xz
,
269 text
, sizeof(text
), false);
270 test_decompress_startswith(OBJECT_COMPRESSED_XZ
,
271 compress_blob_xz
, decompress_startswith_xz
,
272 data
, sizeof(data
), true);
273 test_decompress_startswith(OBJECT_COMPRESSED_XZ
,
274 compress_blob_xz
, decompress_startswith_xz
,
275 huge
, sizeof(huge
), true);
277 test_compress_stream(OBJECT_COMPRESSED_XZ
, "xzcat",
278 compress_stream_xz
, decompress_stream_xz
, srcfile
);
280 log_info("/* XZ test skipped */");
284 test_compress_decompress(OBJECT_COMPRESSED_LZ4
, compress_blob_lz4
, decompress_blob_lz4
,
285 text
, sizeof(text
), false);
286 test_compress_decompress(OBJECT_COMPRESSED_LZ4
, compress_blob_lz4
, decompress_blob_lz4
,
287 data
, sizeof(data
), true);
289 test_decompress_startswith(OBJECT_COMPRESSED_LZ4
,
290 compress_blob_lz4
, decompress_startswith_lz4
,
291 text
, sizeof(text
), false);
292 test_decompress_startswith(OBJECT_COMPRESSED_LZ4
,
293 compress_blob_lz4
, decompress_startswith_lz4
,
294 data
, sizeof(data
), true);
295 test_decompress_startswith(OBJECT_COMPRESSED_LZ4
,
296 compress_blob_lz4
, decompress_startswith_lz4
,
297 huge
, sizeof(huge
), true);
299 test_compress_stream(OBJECT_COMPRESSED_LZ4
, "lz4cat",
300 compress_stream_lz4
, decompress_stream_lz4
, srcfile
);
302 test_lz4_decompress_partial();
304 log_info("/* LZ4 test skipped */");
309 log_info("/* XZ and LZ4 tests skipped */");
310 return EXIT_TEST_SKIP
;