1 // SPDX-License-Identifier: GPL-2.0
8 int zstd_init(struct zstd_data *data, int level)  in zstd_init()  argument
12 	data->dstream = ZSTD_createDStream();  in zstd_init()
13 	if (data->dstream == NULL) {  in zstd_init()
15 		return -1;  in zstd_init()
18 	ret = ZSTD_initDStream(data->dstream);  in zstd_init()
21 		return -1;  in zstd_init()
27 	data->cstream = ZSTD_createCStream();  in zstd_init()
28 	if (data->cstream == NULL) {  in zstd_init()
30 		return -1;  in zstd_init()
33 	ret = ZSTD_initCStream(data->cstream, level);  in zstd_init()
36 		return -1;  in zstd_init()
42 int zstd_fini(struct zstd_data *data)  in zstd_fini()  argument
44 	if (data->dstream) {  in zstd_fini()
45 		ZSTD_freeDStream(data->dstream);  in zstd_fini()
46 		data->dstream = NULL;  in zstd_fini()
49 	if (data->cstream) {  in zstd_fini()
50 		ZSTD_freeCStream(data->cstream);  in zstd_fini()
51 		data->cstream = NULL;  in zstd_fini()
57 size_t zstd_compress_stream_to_records(struct zstd_data *data, void *dst, size_t dst_size,  in zstd_compress_stream_to_records()  argument
61 	size_t ret, size, compressed = 0;  in zstd_compress_stream_to_records()  local
66 	while (input.pos < input.size) {  in zstd_compress_stream_to_records()
68 		size = process_header(record, 0);  in zstd_compress_stream_to_records()
69 		compressed += size;  in zstd_compress_stream_to_records()
70 		dst += size;  in zstd_compress_stream_to_records()
71 		dst_size -= size;  in zstd_compress_stream_to_records()
74 		ret = ZSTD_compressStream(data->cstream, &output, &input);  in zstd_compress_stream_to_records()
75 		ZSTD_flushStream(data->cstream, &output);  in zstd_compress_stream_to_records()
82 		size = output.pos;  in zstd_compress_stream_to_records()
83 		size = process_header(record, size);  in zstd_compress_stream_to_records()
84 		compressed += size;  in zstd_compress_stream_to_records()
85 		dst += size;  in zstd_compress_stream_to_records()
86 		dst_size -= size;  in zstd_compress_stream_to_records()
92 size_t zstd_decompress_stream(struct zstd_data *data, void *src, size_t src_size,  in zstd_decompress_stream()  argument
99 	while (input.pos < input.size) {  in zstd_decompress_stream()
100 		ret = ZSTD_decompressStream(data->dstream, &output, &input);  in zstd_decompress_stream()
102 			pr_err("failed to decompress (B): %zd -> %zd, dst_size %zd : %s\n",  in zstd_decompress_stream()
103 			       src_size, output.size, dst_size, ZSTD_getErrorName(ret));  in zstd_decompress_stream()
107 		output.size = dst_size - output.pos;  in zstd_decompress_stream()