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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/tools/perf/util/compress.h
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@@ -2,6 +2,11 @@
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 #ifndef PERF_COMPRESS_H
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 #define PERF_COMPRESS_H
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+#include <stdbool.h>
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+#ifdef HAVE_ZSTD_SUPPORT
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+#include <zstd.h>
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+#endif
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+
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 #ifdef HAVE_ZLIB_SUPPORT
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 int gzip_decompress_to_file(const char *input, int output_fd);
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 bool gzip_is_compressed(const char *input);
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@@ -12,4 +17,52 @@
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 bool lzma_is_compressed(const char *input);
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 #endif
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+struct zstd_data {
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+#ifdef HAVE_ZSTD_SUPPORT
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+	ZSTD_CStream	*cstream;
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+	ZSTD_DStream	*dstream;
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+#endif
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+};
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+
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+#ifdef HAVE_ZSTD_SUPPORT
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+
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+int zstd_init(struct zstd_data *data, int level);
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+int zstd_fini(struct zstd_data *data);
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+
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+size_t zstd_compress_stream_to_records(struct zstd_data *data, void *dst, size_t dst_size,
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+				       void *src, size_t src_size, size_t max_record_size,
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+				       size_t process_header(void *record, size_t increment));
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+
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+size_t zstd_decompress_stream(struct zstd_data *data, void *src, size_t src_size,
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+			      void *dst, size_t dst_size);
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+#else /* !HAVE_ZSTD_SUPPORT */
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+
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+static inline int zstd_init(struct zstd_data *data __maybe_unused, int level __maybe_unused)
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+{
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+	return 0;
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+}
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+
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+static inline int zstd_fini(struct zstd_data *data __maybe_unused)
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+{
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+	return 0;
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+}
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+
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+static inline
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+size_t zstd_compress_stream_to_records(struct zstd_data *data __maybe_unused,
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+				       void *dst __maybe_unused, size_t dst_size __maybe_unused,
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+				       void *src __maybe_unused, size_t src_size __maybe_unused,
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+				       size_t max_record_size __maybe_unused,
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+				       size_t process_header(void *record, size_t increment) __maybe_unused)
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+{
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+	return 0;
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+}
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+
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+static inline size_t zstd_decompress_stream(struct zstd_data *data __maybe_unused, void *src __maybe_unused,
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+					    size_t src_size __maybe_unused, void *dst __maybe_unused,
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+					    size_t dst_size __maybe_unused)
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+{
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+	return 0;
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+}
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+#endif
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+
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 #endif /* PERF_COMPRESS_H */