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[contrib][linux] Expose zstd headers to avoid duplication

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Expose the zstd headers in `include/linux` to avoid struct duplication.
This makes the member names not follow Kernel style guidelines, and
exposes the zstd symbols. But, the LMKL reviewers are okay with that.
This commit is contained in:
Nick Terrell
2020-12-03 12:37:30 -08:00
parent 49a9e070f5
commit e4b914e663
5 changed files with 112 additions and 255 deletions
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40
contrib/linux-kernel/zstd_decompress_module.c
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@@ -5,9 +5,7 @@
#include <linux/string.h>
#include <linux/zstd.h>
#include "zstd.h"
#include "common/zstd_deps.h"
#include "common/zstd_errors.h"
/* Common symbols. zstd_compress must depend on zstd_decompress. */
@@ -17,7 +15,7 @@ unsigned int zstd_is_error(size_t code)
}
EXPORT_SYMBOL(zstd_is_error);
int zstd_get_error_code(size_t code)
zstd_error_code zstd_get_error_code(size_t code)
{
return ZSTD_getErrorCode(code);
}
@@ -74,19 +72,10 @@ size_t zstd_reset_dstream(zstd_dstream *dstream)
}
EXPORT_SYMBOL(zstd_reset_dstream);
size_t zstd_decompress_stream(zstd_dstream *dstream,
struct zstd_out_buffer *output, struct zstd_in_buffer *input)
size_t zstd_decompress_stream(zstd_dstream *dstream, zstd_out_buffer *output,
zstd_in_buffer *input)
{
ZSTD_outBuffer o;
ZSTD_inBuffer i;
size_t ret;
ZSTD_memcpy(&o, output, sizeof(o));
ZSTD_memcpy(&i, input, sizeof(i));
ret = ZSTD_decompressStream(dstream, &o, &i);
ZSTD_memcpy(output, &o, sizeof(o));
ZSTD_memcpy(input, &i, sizeof(i));
return ret;
return ZSTD_decompressStream(dstream, output, input);
}
EXPORT_SYMBOL(zstd_decompress_stream);
@@ -96,27 +85,12 @@ size_t zstd_find_frame_compressed_size(const void *src, size_t src_size)
}
EXPORT_SYMBOL(zstd_find_frame_compressed_size);
size_t zstd_get_frame_params(struct zstd_frame_params *params, const void *src,
size_t zstd_get_frame_header(zstd_frame_header *header, const void *src,
size_t src_size)
{
ZSTD_frameHeader h;
const size_t ret = ZSTD_getFrameHeader(&h, src, src_size);
if (ret != 0)
return ret;
if (h.frameContentSize != ZSTD_CONTENTSIZE_UNKNOWN)
params->frame_content_size = h.frameContentSize;
else
params->frame_content_size = 0;
params->window_size = h.windowSize;
params->dict_id = h.dictID;
params->checksum_flag = h.checksumFlag;
return ret;
return ZSTD_getFrameHeader(header, src, src_size);
}
EXPORT_SYMBOL(zstd_get_frame_params);
EXPORT_SYMBOL(zstd_get_frame_header);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("Zstd Decompressor");