1 // SPDX-License-Identifier: GPL-2.0
8 int zstd_init(struct zstd_data *data, int level)  in zstd_init()  argument
10 	data->comp_level = level;  in zstd_init()
11 	data->dstream = NULL;  in zstd_init()
12 	data->cstream = NULL;  in zstd_init()
16 int zstd_fini(struct zstd_data *data)  in zstd_fini()  argument
18 	if (data->dstream) {  in zstd_fini()
19 		ZSTD_freeDStream(data->dstream);  in zstd_fini()
20 		data->dstream = NULL;  in zstd_fini()
23 	if (data->cstream) {  in zstd_fini()
24 		ZSTD_freeCStream(data->cstream);  in zstd_fini()
25 		data->cstream = NULL;  in zstd_fini()
31 ssize_t zstd_compress_stream_to_records(struct zstd_data *data, void *dst, size_t dst_size,  in zstd_compress_stream_to_records()  argument
35 	size_t ret, size, compressed = 0;  in zstd_compress_stream_to_records()  local
40 	if (!data->cstream) {  in zstd_compress_stream_to_records()
41 		data->cstream = ZSTD_createCStream();  in zstd_compress_stream_to_records()
42 		if (data->cstream == NULL) {  in zstd_compress_stream_to_records()
44 			return -1;  in zstd_compress_stream_to_records()
47 		ret = ZSTD_initCStream(data->cstream, data->comp_level);  in zstd_compress_stream_to_records()
51 			return -1;  in zstd_compress_stream_to_records()
55 	while (input.pos < input.size) {  in zstd_compress_stream_to_records()
57 		size = process_header(record, 0);  in zstd_compress_stream_to_records()
58 		compressed += size;  in zstd_compress_stream_to_records()
59 		dst += size;  in zstd_compress_stream_to_records()
60 		dst_size -= size;  in zstd_compress_stream_to_records()
63 		ret = ZSTD_compressStream(data->cstream, &output, &input);  in zstd_compress_stream_to_records()
64 		ZSTD_flushStream(data->cstream, &output);  in zstd_compress_stream_to_records()
71 		size = output.pos;  in zstd_compress_stream_to_records()
72 		size = process_header(record, size);  in zstd_compress_stream_to_records()
73 		compressed += size;  in zstd_compress_stream_to_records()
74 		dst += size;  in zstd_compress_stream_to_records()
75 		dst_size -= size;  in zstd_compress_stream_to_records()
81 size_t zstd_decompress_stream(struct zstd_data *data, void *src, size_t src_size,  in zstd_decompress_stream()  argument
88 	if (!data->dstream) {  in zstd_decompress_stream()
89 		data->dstream = ZSTD_createDStream();  in zstd_decompress_stream()
90 		if (data->dstream == NULL) {  in zstd_decompress_stream()
95 		ret = ZSTD_initDStream(data->dstream);  in zstd_decompress_stream()
102 	while (input.pos < input.size) {  in zstd_decompress_stream()
103 		ret = ZSTD_decompressStream(data->dstream, &output, &input);  in zstd_decompress_stream()
105 			pr_err("failed to decompress (B): %zd -> %zd, dst_size %zd : %s\n",  in zstd_decompress_stream()
106 			       src_size, output.size, dst_size, ZSTD_getErrorName(ret));  in zstd_decompress_stream()
110 		output.size = dst_size - output.pos;  in zstd_decompress_stream()