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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
e4e61fdb | 2 | |
82e24b00 | 3 | #include <inttypes.h> |
e4e61fdb | 4 | #include <stdlib.h> |
4b5bc539 | 5 | #include <sys/mman.h> |
ca78ad1d ZJS |
6 | #include <sys/types.h> |
7 | #include <sys/stat.h> | |
07630cea | 8 | #include <unistd.h> |
d89c8fdf | 9 | |
349cc4a5 | 10 | #if HAVE_XZ |
3ffd4af2 | 11 | #include <lzma.h> |
d89c8fdf ZJS |
12 | #endif |
13 | ||
349cc4a5 | 14 | #if HAVE_LZ4 |
3ffd4af2 LP |
15 | #include <lz4.h> |
16 | #include <lz4frame.h> | |
d89c8fdf | 17 | #endif |
e4e61fdb | 18 | |
ef5924aa NL |
19 | #if HAVE_ZSTD |
20 | #include <zstd.h> | |
21 | #include <zstd_errors.h> | |
22 | #endif | |
23 | ||
b5efdb8a | 24 | #include "alloc-util.h" |
e4e61fdb | 25 | #include "compress.h" |
3ffd4af2 | 26 | #include "fd-util.h" |
c004493c | 27 | #include "io-util.h" |
07630cea | 28 | #include "journal-def.h" |
355b59e2 | 29 | #include "macro.h" |
d89c8fdf | 30 | #include "sparse-endian.h" |
8b43440b | 31 | #include "string-table.h" |
07630cea | 32 | #include "string-util.h" |
4094c4bf | 33 | #include "unaligned.h" |
07630cea | 34 | #include "util.h" |
d89c8fdf | 35 | |
349cc4a5 | 36 | #if HAVE_LZ4 |
4b5bc539 ZJS |
37 | DEFINE_TRIVIAL_CLEANUP_FUNC(LZ4F_compressionContext_t, LZ4F_freeCompressionContext); |
38 | DEFINE_TRIVIAL_CLEANUP_FUNC(LZ4F_decompressionContext_t, LZ4F_freeDecompressionContext); | |
39 | #endif | |
40 | ||
ef5924aa NL |
41 | #if HAVE_ZSTD |
42 | DEFINE_TRIVIAL_CLEANUP_FUNC(ZSTD_CCtx *, ZSTD_freeCCtx); | |
43 | DEFINE_TRIVIAL_CLEANUP_FUNC(ZSTD_DCtx *, ZSTD_freeDCtx); | |
44 | ||
45 | static int zstd_ret_to_errno(size_t ret) { | |
46 | switch (ZSTD_getErrorCode(ret)) { | |
47 | case ZSTD_error_dstSize_tooSmall: | |
48 | return -ENOBUFS; | |
49 | case ZSTD_error_memory_allocation: | |
50 | return -ENOMEM; | |
51 | default: | |
52 | return -EBADMSG; | |
53 | } | |
54 | } | |
55 | #endif | |
56 | ||
d89c8fdf ZJS |
57 | #define ALIGN_8(l) ALIGN_TO(l, sizeof(size_t)) |
58 | ||
59 | static const char* const object_compressed_table[_OBJECT_COMPRESSED_MAX] = { | |
e9ece6a0 LP |
60 | [OBJECT_COMPRESSED_XZ] = "XZ", |
61 | [OBJECT_COMPRESSED_LZ4] = "LZ4", | |
8653185a | 62 | [OBJECT_COMPRESSED_ZSTD] = "ZSTD", |
e9ece6a0 LP |
63 | /* If we add too many more entries here, it's going to grow quite large (and be mostly sparse), since |
64 | * the array key is actually a bitmask, not a plain enum */ | |
d89c8fdf | 65 | }; |
e4e61fdb | 66 | |
d89c8fdf ZJS |
67 | DEFINE_STRING_TABLE_LOOKUP(object_compressed, int); |
68 | ||
5d6f46b6 ZJS |
69 | int compress_blob_xz(const void *src, uint64_t src_size, |
70 | void *dst, size_t dst_alloc_size, size_t *dst_size) { | |
349cc4a5 | 71 | #if HAVE_XZ |
1930eed2 JS |
72 | static const lzma_options_lzma opt = { |
73 | 1u << 20u, NULL, 0, LZMA_LC_DEFAULT, LZMA_LP_DEFAULT, | |
0240c603 LP |
74 | LZMA_PB_DEFAULT, LZMA_MODE_FAST, 128, LZMA_MF_HC3, 4 |
75 | }; | |
76 | static const lzma_filter filters[] = { | |
77 | { LZMA_FILTER_LZMA2, (lzma_options_lzma*) &opt }, | |
78 | { LZMA_VLI_UNKNOWN, NULL } | |
1930eed2 | 79 | }; |
e4e61fdb | 80 | lzma_ret ret; |
76cc0bf6 | 81 | size_t out_pos = 0; |
e4e61fdb LP |
82 | |
83 | assert(src); | |
84 | assert(src_size > 0); | |
85 | assert(dst); | |
5d6f46b6 | 86 | assert(dst_alloc_size > 0); |
e4e61fdb LP |
87 | assert(dst_size); |
88 | ||
d89c8fdf | 89 | /* Returns < 0 if we couldn't compress the data or the |
e4e61fdb LP |
90 | * compressed result is longer than the original */ |
91 | ||
1930eed2 JS |
92 | if (src_size < 80) |
93 | return -ENOBUFS; | |
94 | ||
95 | ret = lzma_stream_buffer_encode((lzma_filter*) filters, LZMA_CHECK_NONE, NULL, | |
5d6f46b6 | 96 | src, src_size, dst, &out_pos, dst_alloc_size); |
e4e61fdb | 97 | if (ret != LZMA_OK) |
d89c8fdf | 98 | return -ENOBUFS; |
e4e61fdb | 99 | |
76cc0bf6 | 100 | *dst_size = out_pos; |
d89c8fdf ZJS |
101 | return 0; |
102 | #else | |
103 | return -EPROTONOSUPPORT; | |
104 | #endif | |
e4e61fdb LP |
105 | } |
106 | ||
5d6f46b6 ZJS |
107 | int compress_blob_lz4(const void *src, uint64_t src_size, |
108 | void *dst, size_t dst_alloc_size, size_t *dst_size) { | |
349cc4a5 | 109 | #if HAVE_LZ4 |
d89c8fdf ZJS |
110 | int r; |
111 | ||
112 | assert(src); | |
113 | assert(src_size > 0); | |
114 | assert(dst); | |
5d6f46b6 | 115 | assert(dst_alloc_size > 0); |
d89c8fdf ZJS |
116 | assert(dst_size); |
117 | ||
118 | /* Returns < 0 if we couldn't compress the data or the | |
119 | * compressed result is longer than the original */ | |
120 | ||
121 | if (src_size < 9) | |
122 | return -ENOBUFS; | |
e4e61fdb | 123 | |
691b90d4 | 124 | r = LZ4_compress_default(src, (char*)dst + 8, src_size, (int) dst_alloc_size - 8); |
d89c8fdf ZJS |
125 | if (r <= 0) |
126 | return -ENOBUFS; | |
127 | ||
4094c4bf | 128 | unaligned_write_le64(dst, src_size); |
d89c8fdf ZJS |
129 | *dst_size = r + 8; |
130 | ||
131 | return 0; | |
132 | #else | |
133 | return -EPROTONOSUPPORT; | |
134 | #endif | |
135 | } | |
136 | ||
8653185a LP |
137 | int compress_blob_zstd( |
138 | const void *src, uint64_t src_size, | |
139 | void *dst, size_t dst_alloc_size, size_t *dst_size) { | |
140 | #if HAVE_ZSTD | |
141 | size_t k; | |
142 | ||
143 | assert(src); | |
144 | assert(src_size > 0); | |
145 | assert(dst); | |
146 | assert(dst_alloc_size > 0); | |
147 | assert(dst_size); | |
148 | ||
149 | k = ZSTD_compress(dst, dst_alloc_size, src, src_size, 0); | |
150 | if (ZSTD_isError(k)) | |
151 | return zstd_ret_to_errno(k); | |
152 | ||
153 | *dst_size = k; | |
154 | return 0; | |
155 | #else | |
156 | return -EPROTONOSUPPORT; | |
157 | #endif | |
158 | } | |
159 | ||
d89c8fdf | 160 | int decompress_blob_xz(const void *src, uint64_t src_size, |
fa1c4b51 | 161 | void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max) { |
d89c8fdf | 162 | |
349cc4a5 | 163 | #if HAVE_XZ |
5e592c66 | 164 | _cleanup_(lzma_end) lzma_stream s = LZMA_STREAM_INIT; |
e4e61fdb | 165 | lzma_ret ret; |
fa1c4b51 | 166 | size_t space; |
e4e61fdb LP |
167 | |
168 | assert(src); | |
169 | assert(src_size > 0); | |
170 | assert(dst); | |
171 | assert(dst_alloc_size); | |
172 | assert(dst_size); | |
173 | assert(*dst_alloc_size == 0 || *dst); | |
174 | ||
175 | ret = lzma_stream_decoder(&s, UINT64_MAX, 0); | |
176 | if (ret != LZMA_OK) | |
d89c8fdf | 177 | return -ENOMEM; |
e4e61fdb | 178 | |
fa1c4b51 | 179 | space = MIN(src_size * 2, dst_max ?: (size_t) -1); |
5e592c66 | 180 | if (!greedy_realloc(dst, dst_alloc_size, space, 1)) |
01c3322e | 181 | return -ENOMEM; |
e4e61fdb LP |
182 | |
183 | s.next_in = src; | |
184 | s.avail_in = src_size; | |
185 | ||
186 | s.next_out = *dst; | |
93b73b06 | 187 | s.avail_out = space; |
e4e61fdb LP |
188 | |
189 | for (;;) { | |
fa1c4b51 | 190 | size_t used; |
e4e61fdb LP |
191 | |
192 | ret = lzma_code(&s, LZMA_FINISH); | |
193 | ||
194 | if (ret == LZMA_STREAM_END) | |
195 | break; | |
d89c8fdf ZJS |
196 | else if (ret != LZMA_OK) |
197 | return -ENOMEM; | |
e4e61fdb | 198 | |
93b73b06 LP |
199 | if (dst_max > 0 && (space - s.avail_out) >= dst_max) |
200 | break; | |
d89c8fdf ZJS |
201 | else if (dst_max > 0 && space == dst_max) |
202 | return -ENOBUFS; | |
93b73b06 | 203 | |
5e592c66 | 204 | used = space - s.avail_out; |
fa1c4b51 | 205 | space = MIN(2 * space, dst_max ?: (size_t) -1); |
5e592c66 | 206 | if (!greedy_realloc(dst, dst_alloc_size, space, 1)) |
01c3322e | 207 | return -ENOMEM; |
e4e61fdb | 208 | |
5e592c66 | 209 | s.avail_out = space - used; |
8e170d29 | 210 | s.next_out = *(uint8_t**)dst + used; |
e4e61fdb LP |
211 | } |
212 | ||
93b73b06 | 213 | *dst_size = space - s.avail_out; |
d89c8fdf ZJS |
214 | return 0; |
215 | #else | |
216 | return -EPROTONOSUPPORT; | |
217 | #endif | |
e4e61fdb LP |
218 | } |
219 | ||
d89c8fdf | 220 | int decompress_blob_lz4(const void *src, uint64_t src_size, |
fa1c4b51 | 221 | void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max) { |
d89c8fdf | 222 | |
349cc4a5 | 223 | #if HAVE_LZ4 |
d89c8fdf | 224 | char* out; |
fa1c4b51 | 225 | int r, size; /* LZ4 uses int for size */ |
e4e61fdb | 226 | |
d89c8fdf ZJS |
227 | assert(src); |
228 | assert(src_size > 0); | |
229 | assert(dst); | |
230 | assert(dst_alloc_size); | |
231 | assert(dst_size); | |
232 | assert(*dst_alloc_size == 0 || *dst); | |
233 | ||
234 | if (src_size <= 8) | |
235 | return -EBADMSG; | |
236 | ||
4094c4bf LP |
237 | size = unaligned_read_le64(src); |
238 | if (size < 0 || (unsigned) size != unaligned_read_le64(src)) | |
fa1c4b51 ZJS |
239 | return -EFBIG; |
240 | if ((size_t) size > *dst_alloc_size) { | |
d89c8fdf ZJS |
241 | out = realloc(*dst, size); |
242 | if (!out) | |
243 | return -ENOMEM; | |
244 | *dst = out; | |
245 | *dst_alloc_size = size; | |
246 | } else | |
247 | out = *dst; | |
248 | ||
8e170d29 | 249 | r = LZ4_decompress_safe((char*)src + 8, out, src_size - 8, size); |
fa1c4b51 | 250 | if (r < 0 || r != size) |
d89c8fdf ZJS |
251 | return -EBADMSG; |
252 | ||
253 | *dst_size = size; | |
254 | return 0; | |
255 | #else | |
256 | return -EPROTONOSUPPORT; | |
257 | #endif | |
258 | } | |
259 | ||
8653185a LP |
260 | int decompress_blob_zstd( |
261 | const void *src, uint64_t src_size, | |
262 | void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max) { | |
263 | ||
264 | #if HAVE_ZSTD | |
265 | size_t space; | |
266 | ||
267 | assert(src); | |
268 | assert(src_size > 0); | |
269 | assert(dst); | |
270 | assert(dst_alloc_size); | |
271 | assert(dst_size); | |
272 | assert(*dst_alloc_size == 0 || *dst); | |
273 | ||
274 | if (src_size > SIZE_MAX/2) /* Overflow? */ | |
275 | return -ENOBUFS; | |
276 | space = src_size * 2; | |
277 | if (dst_max > 0 && space > dst_max) | |
278 | space = dst_max; | |
279 | ||
280 | if (!greedy_realloc(dst, dst_alloc_size, space, 1)) | |
281 | return -ENOMEM; | |
282 | ||
283 | for (;;) { | |
284 | size_t k; | |
285 | ||
286 | k = ZSTD_decompress(*dst, *dst_alloc_size, src, src_size); | |
287 | if (!ZSTD_isError(k)) { | |
288 | *dst_size = k; | |
289 | return 0; | |
290 | } | |
291 | if (ZSTD_getErrorCode(k) != ZSTD_error_dstSize_tooSmall) | |
292 | return zstd_ret_to_errno(k); | |
293 | ||
294 | if (dst_max > 0 && space >= dst_max) /* Already at max? */ | |
295 | return -ENOBUFS; | |
296 | if (space > SIZE_MAX / 2) /* Overflow? */ | |
297 | return -ENOBUFS; | |
298 | ||
299 | space *= 2; | |
300 | if (dst_max > 0 && space > dst_max) | |
301 | space = dst_max; | |
302 | ||
303 | if (!greedy_realloc(dst, dst_alloc_size, space, 1)) | |
304 | return -ENOMEM; | |
305 | } | |
306 | #else | |
307 | return -EPROTONOSUPPORT; | |
308 | #endif | |
309 | } | |
310 | ||
311 | int decompress_blob( | |
312 | int compression, | |
313 | const void *src, uint64_t src_size, | |
314 | void **dst, size_t *dst_alloc_size, size_t* dst_size, size_t dst_max) { | |
315 | ||
d89c8fdf | 316 | if (compression == OBJECT_COMPRESSED_XZ) |
8653185a LP |
317 | return decompress_blob_xz( |
318 | src, src_size, | |
319 | dst, dst_alloc_size, dst_size, dst_max); | |
d89c8fdf | 320 | else if (compression == OBJECT_COMPRESSED_LZ4) |
8653185a LP |
321 | return decompress_blob_lz4( |
322 | src, src_size, | |
323 | dst, dst_alloc_size, dst_size, dst_max); | |
324 | else if (compression == OBJECT_COMPRESSED_ZSTD) | |
325 | return decompress_blob_zstd( | |
326 | src, src_size, | |
327 | dst, dst_alloc_size, dst_size, dst_max); | |
d89c8fdf ZJS |
328 | else |
329 | return -EBADMSG; | |
330 | } | |
331 | ||
d89c8fdf | 332 | int decompress_startswith_xz(const void *src, uint64_t src_size, |
fa1c4b51 ZJS |
333 | void **buffer, size_t *buffer_size, |
334 | const void *prefix, size_t prefix_len, | |
d89c8fdf ZJS |
335 | uint8_t extra) { |
336 | ||
349cc4a5 | 337 | #if HAVE_XZ |
5e592c66 | 338 | _cleanup_(lzma_end) lzma_stream s = LZMA_STREAM_INIT; |
e4e61fdb | 339 | lzma_ret ret; |
e4e61fdb | 340 | |
d89c8fdf | 341 | /* Checks whether the decompressed blob starts with the |
e4e61fdb LP |
342 | * mentioned prefix. The byte extra needs to follow the |
343 | * prefix */ | |
344 | ||
345 | assert(src); | |
346 | assert(src_size > 0); | |
347 | assert(buffer); | |
348 | assert(buffer_size); | |
349 | assert(prefix); | |
350 | assert(*buffer_size == 0 || *buffer); | |
351 | ||
352 | ret = lzma_stream_decoder(&s, UINT64_MAX, 0); | |
353 | if (ret != LZMA_OK) | |
d89c8fdf | 354 | return -EBADMSG; |
e4e61fdb | 355 | |
d89c8fdf ZJS |
356 | if (!(greedy_realloc(buffer, buffer_size, ALIGN_8(prefix_len + 1), 1))) |
357 | return -ENOMEM; | |
e4e61fdb LP |
358 | |
359 | s.next_in = src; | |
360 | s.avail_in = src_size; | |
361 | ||
362 | s.next_out = *buffer; | |
363 | s.avail_out = *buffer_size; | |
364 | ||
365 | for (;;) { | |
e4e61fdb LP |
366 | ret = lzma_code(&s, LZMA_FINISH); |
367 | ||
4c701096 | 368 | if (!IN_SET(ret, LZMA_OK, LZMA_STREAM_END)) |
d89c8fdf | 369 | return -EBADMSG; |
e4e61fdb | 370 | |
5e592c66 ZJS |
371 | if (*buffer_size - s.avail_out >= prefix_len + 1) |
372 | return memcmp(*buffer, prefix, prefix_len) == 0 && | |
373 | ((const uint8_t*) *buffer)[prefix_len] == extra; | |
e4e61fdb LP |
374 | |
375 | if (ret == LZMA_STREAM_END) | |
d89c8fdf | 376 | return 0; |
e4e61fdb | 377 | |
e4e61fdb LP |
378 | s.avail_out += *buffer_size; |
379 | ||
5e592c66 | 380 | if (!(greedy_realloc(buffer, buffer_size, *buffer_size * 2, 1))) |
d89c8fdf | 381 | return -ENOMEM; |
e4e61fdb | 382 | |
8e170d29 | 383 | s.next_out = *(uint8_t**)buffer + *buffer_size - s.avail_out; |
5e592c66 | 384 | } |
d89c8fdf ZJS |
385 | |
386 | #else | |
387 | return -EPROTONOSUPPORT; | |
388 | #endif | |
389 | } | |
390 | ||
391 | int decompress_startswith_lz4(const void *src, uint64_t src_size, | |
fa1c4b51 ZJS |
392 | void **buffer, size_t *buffer_size, |
393 | const void *prefix, size_t prefix_len, | |
d89c8fdf | 394 | uint8_t extra) { |
349cc4a5 | 395 | #if HAVE_LZ4 |
d89c8fdf ZJS |
396 | /* Checks whether the decompressed blob starts with the |
397 | * mentioned prefix. The byte extra needs to follow the | |
398 | * prefix */ | |
399 | ||
400 | int r; | |
401 | ||
402 | assert(src); | |
403 | assert(src_size > 0); | |
404 | assert(buffer); | |
405 | assert(buffer_size); | |
406 | assert(prefix); | |
407 | assert(*buffer_size == 0 || *buffer); | |
408 | ||
409 | if (src_size <= 8) | |
410 | return -EBADMSG; | |
411 | ||
412 | if (!(greedy_realloc(buffer, buffer_size, ALIGN_8(prefix_len + 1), 1))) | |
413 | return -ENOMEM; | |
414 | ||
8e170d29 | 415 | r = LZ4_decompress_safe_partial((char*)src + 8, *buffer, src_size - 8, |
d89c8fdf | 416 | prefix_len + 1, *buffer_size); |
e41ef6fd ZJS |
417 | /* One lz4 < 1.8.3, we might get "failure" (r < 0), or "success" where |
418 | * just a part of the buffer is decompressed. But if we get a smaller | |
419 | * amount of bytes than requested, we don't know whether there isn't enough | |
420 | * data to fill the requested size or whether we just got a partial answer. | |
421 | */ | |
422 | if (r < 0 || (size_t) r < prefix_len + 1) { | |
423 | size_t size; | |
424 | ||
425 | if (LZ4_versionNumber() >= 10803) | |
426 | /* We trust that the newer lz4 decompresses the number of bytes we | |
427 | * requested if available in the compressed string. */ | |
428 | return 0; | |
429 | ||
430 | if (r > 0) | |
431 | /* Compare what we have first, in case of mismatch we can | |
432 | * shortcut the full comparison. */ | |
433 | if (memcmp(*buffer, prefix, r) != 0) | |
434 | return 0; | |
435 | ||
436 | /* Before version 1.8.3, lz4 always tries to decode full a "sequence", | |
437 | * so in pathological cases might need to decompress the full field. */ | |
1f4b467d ZJS |
438 | r = decompress_blob_lz4(src, src_size, buffer, buffer_size, &size, 0); |
439 | if (r < 0) | |
440 | return r; | |
d89c8fdf | 441 | |
e41ef6fd ZJS |
442 | if (size < prefix_len + 1) |
443 | return 0; | |
444 | } | |
d89c8fdf | 445 | |
e41ef6fd ZJS |
446 | return memcmp(*buffer, prefix, prefix_len) == 0 && |
447 | ((const uint8_t*) *buffer)[prefix_len] == extra; | |
d89c8fdf ZJS |
448 | #else |
449 | return -EPROTONOSUPPORT; | |
450 | #endif | |
e4e61fdb | 451 | } |
355b59e2 | 452 | |
8653185a LP |
453 | int decompress_startswith_zstd( |
454 | const void *src, uint64_t src_size, | |
455 | void **buffer, size_t *buffer_size, | |
456 | const void *prefix, size_t prefix_len, | |
457 | uint8_t extra) { | |
458 | #if HAVE_ZSTD | |
459 | _cleanup_(ZSTD_freeDCtxp) ZSTD_DCtx *dctx = NULL; | |
460 | size_t k; | |
461 | ||
462 | assert(src); | |
463 | assert(src_size > 0); | |
464 | assert(buffer); | |
465 | assert(buffer_size); | |
466 | assert(prefix); | |
467 | assert(*buffer_size == 0 || *buffer); | |
468 | ||
469 | dctx = ZSTD_createDCtx(); | |
470 | if (!dctx) | |
471 | return -ENOMEM; | |
472 | ||
473 | if (!(greedy_realloc(buffer, buffer_size, MAX(ZSTD_DStreamOutSize(), prefix_len + 1), 1))) | |
474 | return -ENOMEM; | |
475 | ||
476 | ZSTD_inBuffer input = { | |
477 | .src = src, | |
478 | .size = src_size, | |
479 | }; | |
480 | ZSTD_outBuffer output = { | |
481 | .dst = *buffer, | |
482 | .size = *buffer_size, | |
483 | }; | |
484 | ||
485 | for (;;) { | |
486 | k = ZSTD_decompressStream(dctx, &output, &input); | |
487 | if (ZSTD_isError(k)) { | |
488 | log_debug("ZSTD decoder failed: %s", ZSTD_getErrorName(k)); | |
489 | return zstd_ret_to_errno(k); | |
490 | } | |
491 | ||
492 | if (output.pos >= prefix_len + 1) | |
493 | return memcmp(*buffer, prefix, prefix_len) == 0 && | |
494 | ((const uint8_t*) *buffer)[prefix_len] == extra; | |
495 | ||
496 | if (input.pos >= input.size) | |
497 | return 0; | |
498 | ||
499 | if (*buffer_size > SIZE_MAX/2) | |
500 | return -ENOBUFS; | |
501 | ||
502 | if (!(greedy_realloc(buffer, buffer_size, *buffer_size * 2, 1))) | |
503 | return -ENOMEM; | |
504 | ||
505 | output.dst = *buffer; | |
506 | output.size = *buffer_size; | |
507 | } | |
508 | #else | |
509 | return -EPROTONOSUPPORT; | |
510 | #endif | |
511 | } | |
512 | ||
513 | int decompress_startswith( | |
514 | int compression, | |
515 | const void *src, uint64_t src_size, | |
516 | void **buffer, size_t *buffer_size, | |
517 | const void *prefix, size_t prefix_len, | |
518 | uint8_t extra) { | |
519 | ||
d89c8fdf | 520 | if (compression == OBJECT_COMPRESSED_XZ) |
8653185a LP |
521 | return decompress_startswith_xz( |
522 | src, src_size, | |
523 | buffer, buffer_size, | |
524 | prefix, prefix_len, | |
525 | extra); | |
526 | ||
d89c8fdf | 527 | else if (compression == OBJECT_COMPRESSED_LZ4) |
8653185a LP |
528 | return decompress_startswith_lz4( |
529 | src, src_size, | |
530 | buffer, buffer_size, | |
531 | prefix, prefix_len, | |
532 | extra); | |
533 | else if (compression == OBJECT_COMPRESSED_ZSTD) | |
534 | return decompress_startswith_zstd( | |
535 | src, src_size, | |
536 | buffer, buffer_size, | |
537 | prefix, prefix_len, | |
538 | extra); | |
d89c8fdf ZJS |
539 | else |
540 | return -EBADMSG; | |
541 | } | |
542 | ||
59f448cf | 543 | int compress_stream_xz(int fdf, int fdt, uint64_t max_bytes) { |
349cc4a5 | 544 | #if HAVE_XZ |
355b59e2 ZJS |
545 | _cleanup_(lzma_end) lzma_stream s = LZMA_STREAM_INIT; |
546 | lzma_ret ret; | |
355b59e2 ZJS |
547 | uint8_t buf[BUFSIZ], out[BUFSIZ]; |
548 | lzma_action action = LZMA_RUN; | |
549 | ||
550 | assert(fdf >= 0); | |
551 | assert(fdt >= 0); | |
552 | ||
d89c8fdf | 553 | ret = lzma_easy_encoder(&s, LZMA_PRESET_DEFAULT, LZMA_CHECK_CRC64); |
355b59e2 | 554 | if (ret != LZMA_OK) { |
1fa2f38f | 555 | log_error("Failed to initialize XZ encoder: code %u", ret); |
355b59e2 ZJS |
556 | return -EINVAL; |
557 | } | |
558 | ||
559 | for (;;) { | |
560 | if (s.avail_in == 0 && action == LZMA_RUN) { | |
561 | size_t m = sizeof(buf); | |
562 | ssize_t n; | |
563 | ||
59f448cf LP |
564 | if (max_bytes != (uint64_t) -1 && (uint64_t) m > max_bytes) |
565 | m = (size_t) max_bytes; | |
355b59e2 ZJS |
566 | |
567 | n = read(fdf, buf, m); | |
568 | if (n < 0) | |
569 | return -errno; | |
570 | if (n == 0) | |
571 | action = LZMA_FINISH; | |
572 | else { | |
573 | s.next_in = buf; | |
574 | s.avail_in = n; | |
575 | ||
59f448cf LP |
576 | if (max_bytes != (uint64_t) -1) { |
577 | assert(max_bytes >= (uint64_t) n); | |
355b59e2 ZJS |
578 | max_bytes -= n; |
579 | } | |
580 | } | |
581 | } | |
582 | ||
583 | if (s.avail_out == 0) { | |
584 | s.next_out = out; | |
585 | s.avail_out = sizeof(out); | |
586 | } | |
587 | ||
588 | ret = lzma_code(&s, action); | |
4c701096 | 589 | if (!IN_SET(ret, LZMA_OK, LZMA_STREAM_END)) { |
1fa2f38f | 590 | log_error("Compression failed: code %u", ret); |
355b59e2 ZJS |
591 | return -EBADMSG; |
592 | } | |
593 | ||
594 | if (s.avail_out == 0 || ret == LZMA_STREAM_END) { | |
595 | ssize_t n, k; | |
596 | ||
597 | n = sizeof(out) - s.avail_out; | |
598 | ||
355b59e2 ZJS |
599 | k = loop_write(fdt, out, n, false); |
600 | if (k < 0) | |
601 | return k; | |
355b59e2 ZJS |
602 | |
603 | if (ret == LZMA_STREAM_END) { | |
fa1c4b51 | 604 | log_debug("XZ compression finished (%"PRIu64" -> %"PRIu64" bytes, %.1f%%)", |
355b59e2 ZJS |
605 | s.total_in, s.total_out, |
606 | (double) s.total_out / s.total_in * 100); | |
607 | ||
608 | return 0; | |
609 | } | |
610 | } | |
611 | } | |
3b1a55e1 ZJS |
612 | #else |
613 | return -EPROTONOSUPPORT; | |
614 | #endif | |
355b59e2 ZJS |
615 | } |
616 | ||
4b5bc539 | 617 | #define LZ4_BUFSIZE (512*1024u) |
d89c8fdf | 618 | |
59f448cf | 619 | int compress_stream_lz4(int fdf, int fdt, uint64_t max_bytes) { |
d89c8fdf | 620 | |
349cc4a5 | 621 | #if HAVE_LZ4 |
4b5bc539 ZJS |
622 | LZ4F_errorCode_t c; |
623 | _cleanup_(LZ4F_freeCompressionContextp) LZ4F_compressionContext_t ctx = NULL; | |
624 | _cleanup_free_ char *buf = NULL; | |
625 | char *src = NULL; | |
d487b815 | 626 | size_t size, n, total_in = 0, total_out, offset = 0, frame_size; |
4b5bc539 ZJS |
627 | struct stat st; |
628 | int r; | |
629 | static const LZ4F_compressOptions_t options = { | |
630 | .stableSrc = 1, | |
631 | }; | |
632 | static const LZ4F_preferences_t preferences = { | |
633 | .frameInfo.blockSizeID = 5, | |
634 | }; | |
d89c8fdf | 635 | |
4b5bc539 ZJS |
636 | c = LZ4F_createCompressionContext(&ctx, LZ4F_VERSION); |
637 | if (LZ4F_isError(c)) | |
638 | return -ENOMEM; | |
d89c8fdf | 639 | |
4b5bc539 | 640 | if (fstat(fdf, &st) < 0) |
5146f9f0 | 641 | return log_debug_errno(errno, "fstat() failed: %m"); |
d89c8fdf | 642 | |
4b5bc539 ZJS |
643 | frame_size = LZ4F_compressBound(LZ4_BUFSIZE, &preferences); |
644 | size = frame_size + 64*1024; /* add some space for header and trailer */ | |
645 | buf = malloc(size); | |
646 | if (!buf) | |
647 | return -ENOMEM; | |
d89c8fdf | 648 | |
d487b815 | 649 | n = offset = total_out = LZ4F_compressBegin(ctx, buf, size, &preferences); |
4b5bc539 ZJS |
650 | if (LZ4F_isError(n)) |
651 | return -EINVAL; | |
d89c8fdf | 652 | |
4b5bc539 | 653 | src = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fdf, 0); |
e0685172 | 654 | if (src == MAP_FAILED) |
4b5bc539 | 655 | return -errno; |
d89c8fdf | 656 | |
4b5bc539 | 657 | log_debug("Buffer size is %zu bytes, header size %zu bytes.", size, n); |
d89c8fdf | 658 | |
4b5bc539 ZJS |
659 | while (total_in < (size_t) st.st_size) { |
660 | ssize_t k; | |
d89c8fdf | 661 | |
4b5bc539 ZJS |
662 | k = MIN(LZ4_BUFSIZE, st.st_size - total_in); |
663 | n = LZ4F_compressUpdate(ctx, buf + offset, size - offset, | |
664 | src + total_in, k, &options); | |
665 | if (LZ4F_isError(n)) { | |
666 | r = -ENOTRECOVERABLE; | |
667 | goto cleanup; | |
d89c8fdf ZJS |
668 | } |
669 | ||
4b5bc539 ZJS |
670 | total_in += k; |
671 | offset += n; | |
672 | total_out += n; | |
d89c8fdf | 673 | |
4b5bc539 | 674 | if (max_bytes != (uint64_t) -1 && total_out > (size_t) max_bytes) { |
82e24b00 | 675 | log_debug("Compressed stream longer than %"PRIu64" bytes", max_bytes); |
4b5bc539 ZJS |
676 | return -EFBIG; |
677 | } | |
d89c8fdf | 678 | |
4b5bc539 | 679 | if (size - offset < frame_size + 4) { |
4b5bc539 ZJS |
680 | k = loop_write(fdt, buf, offset, false); |
681 | if (k < 0) { | |
682 | r = k; | |
683 | goto cleanup; | |
684 | } | |
685 | offset = 0; | |
686 | } | |
687 | } | |
d89c8fdf | 688 | |
4b5bc539 ZJS |
689 | n = LZ4F_compressEnd(ctx, buf + offset, size - offset, &options); |
690 | if (LZ4F_isError(n)) { | |
691 | r = -ENOTRECOVERABLE; | |
692 | goto cleanup; | |
d89c8fdf ZJS |
693 | } |
694 | ||
4b5bc539 ZJS |
695 | offset += n; |
696 | total_out += n; | |
4b5bc539 ZJS |
697 | r = loop_write(fdt, buf, offset, false); |
698 | if (r < 0) | |
699 | goto cleanup; | |
d89c8fdf ZJS |
700 | |
701 | log_debug("LZ4 compression finished (%zu -> %zu bytes, %.1f%%)", | |
702 | total_in, total_out, | |
703 | (double) total_out / total_in * 100); | |
4b5bc539 ZJS |
704 | cleanup: |
705 | munmap(src, st.st_size); | |
706 | return r; | |
d89c8fdf ZJS |
707 | #else |
708 | return -EPROTONOSUPPORT; | |
709 | #endif | |
710 | } | |
711 | ||
59f448cf | 712 | int decompress_stream_xz(int fdf, int fdt, uint64_t max_bytes) { |
d89c8fdf | 713 | |
349cc4a5 | 714 | #if HAVE_XZ |
355b59e2 ZJS |
715 | _cleanup_(lzma_end) lzma_stream s = LZMA_STREAM_INIT; |
716 | lzma_ret ret; | |
717 | ||
718 | uint8_t buf[BUFSIZ], out[BUFSIZ]; | |
719 | lzma_action action = LZMA_RUN; | |
720 | ||
721 | assert(fdf >= 0); | |
722 | assert(fdt >= 0); | |
723 | ||
724 | ret = lzma_stream_decoder(&s, UINT64_MAX, 0); | |
725 | if (ret != LZMA_OK) { | |
5146f9f0 | 726 | log_debug("Failed to initialize XZ decoder: code %u", ret); |
d89c8fdf | 727 | return -ENOMEM; |
355b59e2 ZJS |
728 | } |
729 | ||
730 | for (;;) { | |
731 | if (s.avail_in == 0 && action == LZMA_RUN) { | |
732 | ssize_t n; | |
733 | ||
734 | n = read(fdf, buf, sizeof(buf)); | |
735 | if (n < 0) | |
736 | return -errno; | |
737 | if (n == 0) | |
738 | action = LZMA_FINISH; | |
739 | else { | |
740 | s.next_in = buf; | |
741 | s.avail_in = n; | |
742 | } | |
743 | } | |
744 | ||
745 | if (s.avail_out == 0) { | |
746 | s.next_out = out; | |
747 | s.avail_out = sizeof(out); | |
748 | } | |
749 | ||
750 | ret = lzma_code(&s, action); | |
4c701096 | 751 | if (!IN_SET(ret, LZMA_OK, LZMA_STREAM_END)) { |
5146f9f0 | 752 | log_debug("Decompression failed: code %u", ret); |
355b59e2 ZJS |
753 | return -EBADMSG; |
754 | } | |
755 | ||
756 | if (s.avail_out == 0 || ret == LZMA_STREAM_END) { | |
757 | ssize_t n, k; | |
758 | ||
759 | n = sizeof(out) - s.avail_out; | |
760 | ||
59f448cf LP |
761 | if (max_bytes != (uint64_t) -1) { |
762 | if (max_bytes < (uint64_t) n) | |
d89c8fdf | 763 | return -EFBIG; |
355b59e2 ZJS |
764 | |
765 | max_bytes -= n; | |
766 | } | |
767 | ||
355b59e2 ZJS |
768 | k = loop_write(fdt, out, n, false); |
769 | if (k < 0) | |
770 | return k; | |
355b59e2 ZJS |
771 | |
772 | if (ret == LZMA_STREAM_END) { | |
fa1c4b51 | 773 | log_debug("XZ decompression finished (%"PRIu64" -> %"PRIu64" bytes, %.1f%%)", |
355b59e2 ZJS |
774 | s.total_in, s.total_out, |
775 | (double) s.total_out / s.total_in * 100); | |
776 | ||
777 | return 0; | |
778 | } | |
779 | } | |
780 | } | |
d89c8fdf | 781 | #else |
5146f9f0 | 782 | log_debug("Cannot decompress file. Compiled without XZ support."); |
d89c8fdf ZJS |
783 | return -EPROTONOSUPPORT; |
784 | #endif | |
785 | } | |
786 | ||
8e64dd1e | 787 | int decompress_stream_lz4(int in, int out, uint64_t max_bytes) { |
349cc4a5 | 788 | #if HAVE_LZ4 |
4b5bc539 ZJS |
789 | size_t c; |
790 | _cleanup_(LZ4F_freeDecompressionContextp) LZ4F_decompressionContext_t ctx = NULL; | |
791 | _cleanup_free_ char *buf = NULL; | |
792 | char *src; | |
793 | struct stat st; | |
794 | int r = 0; | |
795 | size_t total_in = 0, total_out = 0; | |
796 | ||
797 | c = LZ4F_createDecompressionContext(&ctx, LZ4F_VERSION); | |
798 | if (LZ4F_isError(c)) | |
799 | return -ENOMEM; | |
800 | ||
801 | if (fstat(in, &st) < 0) | |
5146f9f0 | 802 | return log_debug_errno(errno, "fstat() failed: %m"); |
4b5bc539 ZJS |
803 | |
804 | buf = malloc(LZ4_BUFSIZE); | |
805 | if (!buf) | |
806 | return -ENOMEM; | |
807 | ||
808 | src = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, in, 0); | |
e0685172 | 809 | if (src == MAP_FAILED) |
4b5bc539 ZJS |
810 | return -errno; |
811 | ||
812 | while (total_in < (size_t) st.st_size) { | |
813 | size_t produced = LZ4_BUFSIZE; | |
814 | size_t used = st.st_size - total_in; | |
815 | ||
816 | c = LZ4F_decompress(ctx, buf, &produced, src + total_in, &used, NULL); | |
817 | if (LZ4F_isError(c)) { | |
818 | r = -EBADMSG; | |
819 | goto cleanup; | |
820 | } | |
821 | ||
822 | total_in += used; | |
823 | total_out += produced; | |
824 | ||
825 | if (max_bytes != (uint64_t) -1 && total_out > (size_t) max_bytes) { | |
82e24b00 | 826 | log_debug("Decompressed stream longer than %"PRIu64" bytes", max_bytes); |
5146f9f0 | 827 | r = -EFBIG; |
4b5bc539 ZJS |
828 | goto cleanup; |
829 | } | |
830 | ||
831 | r = loop_write(out, buf, produced, false); | |
832 | if (r < 0) | |
833 | goto cleanup; | |
834 | } | |
835 | ||
836 | log_debug("LZ4 decompression finished (%zu -> %zu bytes, %.1f%%)", | |
837 | total_in, total_out, | |
25048348 | 838 | total_in > 0 ? (double) total_out / total_in * 100 : 0.0); |
4b5bc539 ZJS |
839 | cleanup: |
840 | munmap(src, st.st_size); | |
841 | return r; | |
d89c8fdf | 842 | #else |
5146f9f0 | 843 | log_debug("Cannot decompress file. Compiled without LZ4 support."); |
d89c8fdf ZJS |
844 | return -EPROTONOSUPPORT; |
845 | #endif | |
846 | } | |
847 | ||
ef5924aa NL |
848 | int compress_stream_zstd(int fdf, int fdt, uint64_t max_bytes) { |
849 | #if HAVE_ZSTD | |
850 | _cleanup_(ZSTD_freeCCtxp) ZSTD_CCtx *cctx = NULL; | |
851 | _cleanup_free_ void *in_buff = NULL, *out_buff = NULL; | |
852 | size_t in_allocsize, out_allocsize; | |
853 | size_t z; | |
854 | uint64_t left = max_bytes, in_bytes = 0; | |
ef5924aa NL |
855 | |
856 | assert(fdf >= 0); | |
857 | assert(fdt >= 0); | |
858 | ||
859 | /* Create the context and buffers */ | |
860 | in_allocsize = ZSTD_CStreamInSize(); | |
861 | out_allocsize = ZSTD_CStreamOutSize(); | |
862 | in_buff = malloc(in_allocsize); | |
863 | out_buff = malloc(out_allocsize); | |
864 | cctx = ZSTD_createCCtx(); | |
865 | if (!cctx || !out_buff || !in_buff) | |
866 | return -ENOMEM; | |
867 | ||
ef5924aa NL |
868 | z = ZSTD_CCtx_setParameter(cctx, ZSTD_c_checksumFlag, 1); |
869 | if (ZSTD_isError(z)) | |
870 | log_debug("Failed to enable ZSTD checksum, ignoring: %s", ZSTD_getErrorName(z)); | |
871 | ||
872 | /* This loop read from the input file, compresses that entire chunk, | |
873 | * and writes all output produced to the output file. | |
874 | */ | |
875 | for (;;) { | |
876 | bool is_last_chunk; | |
877 | ZSTD_inBuffer input = { | |
878 | .src = in_buff, | |
879 | .size = 0, | |
880 | .pos = 0 | |
881 | }; | |
882 | ssize_t red; | |
883 | ||
884 | red = loop_read(fdf, in_buff, in_allocsize, true); | |
885 | if (red < 0) | |
886 | return red; | |
887 | is_last_chunk = red == 0; | |
888 | ||
889 | in_bytes += (size_t) red; | |
890 | input.size = (size_t) red; | |
891 | ||
892 | for (bool finished = false; !finished;) { | |
893 | ZSTD_outBuffer output = { | |
894 | .dst = out_buff, | |
895 | .size = out_allocsize, | |
896 | .pos = 0 | |
897 | }; | |
898 | size_t remaining; | |
899 | ssize_t wrote; | |
900 | ||
901 | /* Compress into the output buffer and write all of the | |
902 | * output to the file so we can reuse the buffer next | |
903 | * iteration. | |
904 | */ | |
905 | remaining = ZSTD_compressStream2( | |
906 | cctx, &output, &input, | |
907 | is_last_chunk ? ZSTD_e_end : ZSTD_e_continue); | |
908 | ||
909 | if (ZSTD_isError(remaining)) { | |
910 | log_debug("ZSTD encoder failed: %s", ZSTD_getErrorName(remaining)); | |
911 | return zstd_ret_to_errno(remaining); | |
912 | } | |
913 | ||
914 | if (left < output.pos) | |
915 | return -EFBIG; | |
916 | ||
917 | wrote = loop_write(fdt, output.dst, output.pos, 1); | |
918 | if (wrote < 0) | |
919 | return wrote; | |
920 | ||
921 | left -= output.pos; | |
922 | ||
923 | /* If we're on the last chunk we're finished when zstd | |
924 | * returns 0, which means its consumed all the input AND | |
925 | * finished the frame. Otherwise, we're finished when | |
926 | * we've consumed all the input. | |
927 | */ | |
928 | finished = is_last_chunk ? (remaining == 0) : (input.pos == input.size); | |
929 | } | |
930 | ||
931 | /* zstd only returns 0 when the input is completely consumed */ | |
932 | assert(input.pos == input.size); | |
933 | if (is_last_chunk) | |
934 | break; | |
935 | } | |
936 | ||
937 | log_debug( | |
938 | "ZSTD compression finished (%" PRIu64 " -> %" PRIu64 " bytes, %.1f%%)", | |
939 | in_bytes, | |
940 | max_bytes - left, | |
941 | (double) (max_bytes - left) / in_bytes * 100); | |
942 | ||
943 | return 0; | |
944 | #else | |
945 | return -EPROTONOSUPPORT; | |
946 | #endif | |
947 | } | |
948 | ||
949 | int decompress_stream_zstd(int fdf, int fdt, uint64_t max_bytes) { | |
950 | #if HAVE_ZSTD | |
951 | _cleanup_(ZSTD_freeDCtxp) ZSTD_DCtx *dctx = NULL; | |
952 | _cleanup_free_ void *in_buff = NULL, *out_buff = NULL; | |
953 | size_t in_allocsize, out_allocsize; | |
954 | size_t last_result = 0; | |
955 | uint64_t left = max_bytes, in_bytes = 0; | |
956 | ||
957 | assert(fdf >= 0); | |
958 | assert(fdt >= 0); | |
959 | ||
960 | /* Create the context and buffers */ | |
961 | in_allocsize = ZSTD_DStreamInSize(); | |
962 | out_allocsize = ZSTD_DStreamOutSize(); | |
963 | in_buff = malloc(in_allocsize); | |
964 | out_buff = malloc(out_allocsize); | |
965 | dctx = ZSTD_createDCtx(); | |
966 | if (!dctx || !out_buff || !in_buff) | |
967 | return -ENOMEM; | |
968 | ||
969 | /* This loop assumes that the input file is one or more concatenated | |
970 | * zstd streams. This example won't work if there is trailing non-zstd | |
971 | * data at the end, but streaming decompression in general handles this | |
972 | * case. ZSTD_decompressStream() returns 0 exactly when the frame is | |
973 | * completed, and doesn't consume input after the frame. | |
974 | */ | |
975 | for (;;) { | |
976 | bool has_error = false; | |
977 | ZSTD_inBuffer input = { | |
978 | .src = in_buff, | |
979 | .size = 0, | |
980 | .pos = 0 | |
981 | }; | |
982 | ssize_t red; | |
983 | ||
984 | red = loop_read(fdf, in_buff, in_allocsize, true); | |
985 | if (red < 0) | |
986 | return red; | |
987 | if (red == 0) | |
988 | break; | |
989 | ||
990 | in_bytes += (size_t) red; | |
991 | input.size = (size_t) red; | |
992 | input.pos = 0; | |
993 | ||
994 | /* Given a valid frame, zstd won't consume the last byte of the | |
995 | * frame until it has flushed all of the decompressed data of | |
996 | * the frame. So input.pos < input.size means frame is not done | |
997 | * or there is still output available. | |
998 | */ | |
999 | while (input.pos < input.size) { | |
1000 | ZSTD_outBuffer output = { | |
1001 | .dst = out_buff, | |
1002 | .size = out_allocsize, | |
1003 | .pos = 0 | |
1004 | }; | |
1005 | ssize_t wrote; | |
1006 | /* The return code is zero if the frame is complete, but | |
1007 | * there may be multiple frames concatenated together. | |
1008 | * Zstd will automatically reset the context when a | |
1009 | * frame is complete. Still, calling ZSTD_DCtx_reset() | |
1010 | * can be useful to reset the context to a clean state, | |
1011 | * for instance if the last decompression call returned | |
1012 | * an error. | |
1013 | */ | |
1014 | last_result = ZSTD_decompressStream(dctx, &output, &input); | |
1015 | if (ZSTD_isError(last_result)) { | |
1016 | has_error = true; | |
1017 | break; | |
1018 | } | |
1019 | ||
1020 | if (left < output.pos) | |
1021 | return -EFBIG; | |
1022 | ||
1023 | wrote = loop_write(fdt, output.dst, output.pos, 1); | |
1024 | if (wrote < 0) | |
1025 | return wrote; | |
1026 | ||
1027 | left -= output.pos; | |
1028 | } | |
1029 | if (has_error) | |
1030 | break; | |
1031 | } | |
1032 | ||
1033 | if (in_bytes == 0) | |
1034 | return log_debug_errno(SYNTHETIC_ERRNO(EBADMSG), "ZSTD decoder failed: no data read"); | |
1035 | ||
1036 | if (last_result != 0) { | |
1037 | /* The last return value from ZSTD_decompressStream did not end | |
1038 | * on a frame, but we reached the end of the file! We assume | |
1039 | * this is an error, and the input was truncated. | |
1040 | */ | |
1041 | log_debug("ZSTD decoder failed: %s", ZSTD_getErrorName(last_result)); | |
1042 | return zstd_ret_to_errno(last_result); | |
1043 | } | |
1044 | ||
1045 | log_debug( | |
1046 | "ZSTD decompression finished (%" PRIu64 " -> %" PRIu64 " bytes, %.1f%%)", | |
1047 | in_bytes, | |
1048 | max_bytes - left, | |
1049 | (double) (max_bytes - left) / in_bytes * 100); | |
1050 | return 0; | |
1051 | #else | |
1052 | log_debug("Cannot decompress file. Compiled without ZSTD support."); | |
1053 | return -EPROTONOSUPPORT; | |
1054 | #endif | |
1055 | } | |
1056 | ||
59f448cf | 1057 | int decompress_stream(const char *filename, int fdf, int fdt, uint64_t max_bytes) { |
d89c8fdf ZJS |
1058 | |
1059 | if (endswith(filename, ".lz4")) | |
1060 | return decompress_stream_lz4(fdf, fdt, max_bytes); | |
1061 | else if (endswith(filename, ".xz")) | |
1062 | return decompress_stream_xz(fdf, fdt, max_bytes); | |
ef5924aa NL |
1063 | else if (endswith(filename, ".zst")) |
1064 | return decompress_stream_zstd(fdf, fdt, max_bytes); | |
d89c8fdf ZJS |
1065 | else |
1066 | return -EPROTONOSUPPORT; | |
355b59e2 | 1067 | } |