0addebdbf6
This patch allows to get correct fragment size includes metadata_adder. Current implementaion automatically allocates extra bytes for the metadata_adder in alloc_buffer, and then, no information about the extra bytes will be returned to the api caller side. It's too confusable because callers couldn't know how size they assumes as the fragment size. To be easy to find out the size infomation, this patch adds "frag_adder_size" variable into fragment metadata and also some functions to get fragment size. The definitions of these size infomation are here, fragment_meta: - size-> raw data size used to encode/fragment_to_string - frag_adder_size-> metadata_adder of backend specification And the definitions of functions are here, - get_fragment_size: -> return sizeof(fragument_header) + size + frag_adder_size - get_fragment_buffer_size: -> return size + frag_adder_size - get_fragment_payload_size: -> return size By using these function above, users could get the size information directly from fragments. It results in enabling to return fragment_len to the caller side easily.
58 lines
2.2 KiB
C
58 lines
2.2 KiB
C
/*
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* <Copyright>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY
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* THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* liberasurecode API helpers header
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*
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* vi: set noai tw=79 ts=4 sw=4:
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*/
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#ifndef _ERASURECODE_PREPROCESSING_H_
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#define _ERASURECODE_PREPROCESSING_H_
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int prepare_fragments_for_encode(
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ec_backend_t instance,
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int k, int m,
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const char *orig_data, uint64_t orig_data_size, /* input */
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char **encoded_data, char **encoded_parity, /* output */
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int *blocksize);
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int prepare_fragments_for_decode(
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int k, int m,
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char **data, char **parity,
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int *missing_idxs,
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int *orig_size, int *fragment_payload_size, int fragment_size,
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uint64_t *realloc_bm);
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int get_fragment_partition(
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int k, int m,
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char **fragments, int num_fragments,
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char **data, char **parity,
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int *missing);
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int fragments_to_string(
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int k, int m,
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char **fragments, int num_fragments,
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char **orig_payload, uint64_t *payload_len);
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#endif
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