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Diffstat (limited to 'src/grp-journal/libjournal-core/test-compress.c')
| -rw-r--r-- | src/grp-journal/libjournal-core/test-compress.c | 308 |
1 files changed, 308 insertions, 0 deletions
diff --git a/src/grp-journal/libjournal-core/test-compress.c b/src/grp-journal/libjournal-core/test-compress.c new file mode 100644 index 0000000000..68c9a4d76c --- /dev/null +++ b/src/grp-journal/libjournal-core/test-compress.c @@ -0,0 +1,308 @@ +/*** + This file is part of systemd + + Copyright 2014 Ronny Chevalier + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#ifdef HAVE_LZ4 +#include <lz4.h> +#endif + +#include "alloc-util.h" +#include "compress.h" +#include "fd-util.h" +#include "fileio.h" +#include "macro.h" +#include "random-util.h" +#include "util.h" + +#ifdef HAVE_XZ +# define XZ_OK 0 +#else +# define XZ_OK -EPROTONOSUPPORT +#endif + +#ifdef HAVE_LZ4 +# define LZ4_OK 0 +#else +# define LZ4_OK -EPROTONOSUPPORT +#endif + +typedef int (compress_blob_t)(const void *src, uint64_t src_size, + void *dst, size_t dst_alloc_size, size_t *dst_size); +typedef int (decompress_blob_t)(const void *src, uint64_t src_size, + void **dst, size_t *dst_alloc_size, + size_t* dst_size, size_t dst_max); +typedef int (decompress_sw_t)(const void *src, uint64_t src_size, + void **buffer, size_t *buffer_size, + const void *prefix, size_t prefix_len, + uint8_t extra); + +typedef int (compress_stream_t)(int fdf, int fdt, uint64_t max_bytes); +typedef int (decompress_stream_t)(int fdf, int fdt, uint64_t max_size); + +static void test_compress_decompress(int compression, + compress_blob_t compress, + decompress_blob_t decompress, + const char *data, + size_t data_len, + bool may_fail) { + char compressed[512]; + size_t csize, usize = 0; + _cleanup_free_ char *decompressed = NULL; + int r; + + log_info("/* testing %s %s blob compression/decompression */", + object_compressed_to_string(compression), data); + + r = compress(data, data_len, compressed, sizeof(compressed), &csize); + if (r == -ENOBUFS) { + log_info_errno(r, "compression failed: %m"); + assert_se(may_fail); + } else { + assert_se(r == 0); + r = decompress(compressed, csize, + (void **) &decompressed, &usize, &csize, 0); + assert_se(r == 0); + assert_se(decompressed); + assert_se(memcmp(decompressed, data, data_len) == 0); + } + + r = decompress("garbage", 7, + (void **) &decompressed, &usize, &csize, 0); + assert_se(r < 0); + + /* make sure to have the minimal lz4 compressed size */ + r = decompress("00000000\1g", 9, + (void **) &decompressed, &usize, &csize, 0); + assert_se(r < 0); + + r = decompress("\100000000g", 9, + (void **) &decompressed, &usize, &csize, 0); + assert_se(r < 0); + + memzero(decompressed, usize); +} + +static void test_decompress_startswith(int compression, + compress_blob_t compress, + decompress_sw_t decompress_sw, + const char *data, + size_t data_len, + bool may_fail) { + + char *compressed; + _cleanup_free_ char *compressed1 = NULL, *compressed2 = NULL, *decompressed = NULL; + size_t csize, usize = 0, len; + int r; + + log_info("/* testing decompress_startswith with %s on %.20s text*/", + object_compressed_to_string(compression), data); + +#define BUFSIZE_1 512 +#define BUFSIZE_2 20000 + + compressed = compressed1 = malloc(BUFSIZE_1); + assert_se(compressed1); + r = compress(data, data_len, compressed, BUFSIZE_1, &csize); + if (r == -ENOBUFS) { + log_info_errno(r, "compression failed: %m"); + assert_se(may_fail); + + compressed = compressed2 = malloc(BUFSIZE_2); + assert_se(compressed2); + r = compress(data, data_len, compressed, BUFSIZE_2, &csize); + assert(r == 0); + } + assert_se(r == 0); + + len = strlen(data); + + r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, data, len, '\0'); + assert_se(r > 0); + r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, data, len, 'w'); + assert_se(r == 0); + r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, "barbarbar", 9, ' '); + assert_se(r == 0); + r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, data, len - 1, data[len-1]); + assert_se(r > 0); + r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, data, len - 1, 'w'); + assert_se(r == 0); + r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, data, len, '\0'); + assert_se(r > 0); +} + +static void test_compress_stream(int compression, + const char* cat, + compress_stream_t compress, + decompress_stream_t decompress, + const char *srcfile) { + + _cleanup_close_ int src = -1, dst = -1, dst2 = -1; + char pattern[] = "/tmp/systemd-test.compressed.XXXXXX", + pattern2[] = "/tmp/systemd-test.compressed.XXXXXX"; + int r; + _cleanup_free_ char *cmd = NULL, *cmd2; + struct stat st = {}; + + log_debug("/* testing %s compression */", + object_compressed_to_string(compression)); + + log_debug("/* create source from %s */", srcfile); + + assert_se((src = open(srcfile, O_RDONLY|O_CLOEXEC)) >= 0); + + log_debug("/* test compression */"); + + assert_se((dst = mkostemp_safe(pattern, O_RDWR|O_CLOEXEC)) >= 0); + + assert_se(compress(src, dst, -1) == 0); + + if (cat) { + assert_se(asprintf(&cmd, "%s %s | diff %s -", cat, pattern, srcfile) > 0); + assert_se(system(cmd) == 0); + } + + log_debug("/* test decompression */"); + + assert_se((dst2 = mkostemp_safe(pattern2, O_RDWR|O_CLOEXEC)) >= 0); + + assert_se(stat(srcfile, &st) == 0); + + assert_se(lseek(dst, 0, SEEK_SET) == 0); + r = decompress(dst, dst2, st.st_size); + assert_se(r == 0); + + assert_se(asprintf(&cmd2, "diff %s %s", srcfile, pattern2) > 0); + assert_se(system(cmd2) == 0); + + log_debug("/* test faulty decompression */"); + + assert_se(lseek(dst, 1, SEEK_SET) == 1); + r = decompress(dst, dst2, st.st_size); + assert_se(r == -EBADMSG || r == 0); + + assert_se(lseek(dst, 0, SEEK_SET) == 0); + assert_se(lseek(dst2, 0, SEEK_SET) == 0); + r = decompress(dst, dst2, st.st_size - 1); + assert_se(r == -EFBIG); + + assert_se(unlink(pattern) == 0); + assert_se(unlink(pattern2) == 0); +} + +#ifdef HAVE_LZ4 +static void test_lz4_decompress_partial(void) { + char buf[20000]; + size_t buf_size = sizeof(buf), compressed; + int r; + _cleanup_free_ char *huge = NULL; + +#define HUGE_SIZE (4096*1024) + huge = malloc(HUGE_SIZE); + memset(huge, 'x', HUGE_SIZE); + memcpy(huge, "HUGE=", 5); + + r = LZ4_compress_limitedOutput(huge, buf, HUGE_SIZE, buf_size); + assert_se(r >= 0); + compressed = r; + log_info("Compressed %i → %zu", HUGE_SIZE, compressed); + + r = LZ4_decompress_safe(buf, huge, r, HUGE_SIZE); + assert_se(r >= 0); + log_info("Decompressed → %i", r); + + r = LZ4_decompress_safe_partial(buf, huge, + compressed, + 12, HUGE_SIZE); + assert_se(r >= 0); + log_info("Decompressed partial %i/%i → %i", 12, HUGE_SIZE, r); + + /* We expect this to fail, because that's how current lz4 works. If this + * call succeeds, then lz4 has been fixed, and we need to change our code. + */ + r = LZ4_decompress_safe_partial(buf, huge, + compressed, + 12, HUGE_SIZE-1); + assert_se(r < 0); + log_info("Decompressed partial %i/%i → %i", 12, HUGE_SIZE-1, r); +} +#endif + +int main(int argc, char *argv[]) { + const char text[] = + "text\0foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF" + "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"; + + char data[512] = "random\0"; + + char huge[4096*1024]; + memset(huge, 'x', sizeof(huge)); + memcpy(huge, "HUGE=", 5); + char_array_0(huge); + + log_set_max_level(LOG_DEBUG); + + random_bytes(data + 7, sizeof(data) - 7); + +#ifdef HAVE_XZ + test_compress_decompress(OBJECT_COMPRESSED_XZ, compress_blob_xz, decompress_blob_xz, + text, sizeof(text), false); + test_compress_decompress(OBJECT_COMPRESSED_XZ, compress_blob_xz, decompress_blob_xz, + data, sizeof(data), true); + + test_decompress_startswith(OBJECT_COMPRESSED_XZ, + compress_blob_xz, decompress_startswith_xz, + text, sizeof(text), false); + test_decompress_startswith(OBJECT_COMPRESSED_XZ, + compress_blob_xz, decompress_startswith_xz, + data, sizeof(data), true); + test_decompress_startswith(OBJECT_COMPRESSED_XZ, + compress_blob_xz, decompress_startswith_xz, + huge, sizeof(huge), true); + + test_compress_stream(OBJECT_COMPRESSED_XZ, "xzcat", + compress_stream_xz, decompress_stream_xz, argv[0]); +#else + log_info("/* XZ test skipped */"); +#endif + +#ifdef HAVE_LZ4 + test_compress_decompress(OBJECT_COMPRESSED_LZ4, compress_blob_lz4, decompress_blob_lz4, + text, sizeof(text), false); + test_compress_decompress(OBJECT_COMPRESSED_LZ4, compress_blob_lz4, decompress_blob_lz4, + data, sizeof(data), true); + + test_decompress_startswith(OBJECT_COMPRESSED_LZ4, + compress_blob_lz4, decompress_startswith_lz4, + text, sizeof(text), false); + test_decompress_startswith(OBJECT_COMPRESSED_LZ4, + compress_blob_lz4, decompress_startswith_lz4, + data, sizeof(data), true); + test_decompress_startswith(OBJECT_COMPRESSED_LZ4, + compress_blob_lz4, decompress_startswith_lz4, + huge, sizeof(huge), true); + + test_compress_stream(OBJECT_COMPRESSED_LZ4, "lz4cat", + compress_stream_lz4, decompress_stream_lz4, argv[0]); + + test_lz4_decompress_partial(); +#else + log_info("/* LZ4 test skipped */"); +#endif + + return 0; +} |