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/* | ||
* Copyright 2018 Scality | ||
* | ||
* Redistribution and use in source and binary forms, with or without | ||
* modification, are permitted provided that the following conditions are met: | ||
* | ||
* Redistributions of source code must retain the above copyright notice, this | ||
* list of conditions and the following disclaimer. | ||
* | ||
* Redistributions in binary form must reproduce the above copyright notice, this | ||
* list of conditions and the following disclaimer in the documentation and/or | ||
* other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY | ||
* THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED | ||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | ||
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO | ||
* EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | ||
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | ||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | ||
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE | ||
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | ||
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
* | ||
* quadiron_fnt backend implementation | ||
* | ||
* vi: set noai tw=79 ts=4 sw=4: | ||
*/ | ||
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/* Forward declarations */ | ||
typedef void *(*quadiron_fnt32_new_func)(int word_size, int n_data, int n_parities, int systematic); | ||
typedef void (*quadiron_fnt32_delete_func)(void *fec); | ||
typedef int (*quadiron_fnt32_encode_func)(void *fec, char **data, char **parity, int *qmissing_idxs, int block_size); | ||
typedef int (*quadiron_fnt32_decode_func)(void *fec, char **data, char **parity, int *qmissing_idxs, int block_size); | ||
typedef int (*quadiron_fnt32_reconstruct_func)(void *fec, char **data, char **parity, int *qmissing_idxs, unsigned int destination_idx, int block_size); | ||
typedef int (*quadiron_fnt32_get_metadata_size_func)(void *fec, int block_size); | ||
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typedef struct { | ||
int k; | ||
int m; | ||
int w; | ||
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void *fec; // the instance | ||
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quadiron_fnt32_new_func fnt32_new_func; | ||
quadiron_fnt32_delete_func fnt32_delete_func; | ||
quadiron_fnt32_encode_func fnt32_encode_func; | ||
quadiron_fnt32_decode_func fnt32_decode_func; | ||
quadiron_fnt32_reconstruct_func fnt32_reconstruct_func; | ||
quadiron_fnt32_get_metadata_size_func fnt32_get_metadata_size_func; | ||
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} quadiron_fnt_descriptor; | ||
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int quadiron_fnt_encode(void *desc, char **data, char **parity, int blocksize); | ||
int quadiron_fnt_decode(void *desc, char **data, char **parity, int *missing_idxs, | ||
int blocksize); | ||
int quadiron_fnt_reconstruct(void *desc, char **data, char **parity, | ||
int *missing_idxs, int destination_idx, int blocksize); | ||
int quadiron_fnt_min_fragments(void *desc, int *missing_idxs, | ||
int *fragments_to_exclude, int *fragments_needed); | ||
int quadiron_fnt_element_size(void* desc); | ||
int quadiron_fnt_exit(void *desc); | ||
void * quadiron_fnt_common_init(struct ec_backend_args *args, void *backend_sohandle, | ||
int systematic); | ||
size_t quadiron_fnt_common_get_metadata_size(void *desc, int block_size); | ||
size_t quadiron_fnt_common_get_encode_offset(void *desc, int metadata_size); | ||
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extern void (*quadiron_hex_dump)(char *buf, int buf_size); |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,238 @@ | ||
/* | ||
* Copyright 2018 Scality | ||
* | ||
* Redistribution and use in source and binary forms, with or without | ||
* modification, are permitted provided that the following conditions are met: | ||
* | ||
* Redistributions of source code must retain the above copyright notice, this | ||
* list of conditions and the following disclaimer. | ||
* | ||
* Redistributions in binary form must reproduce the above copyright notice, this | ||
* list of conditions and the following disclaimer in the documentation and/or | ||
* other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY | ||
* THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED | ||
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | ||
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO | ||
* EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | ||
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | ||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | ||
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE | ||
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | ||
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
* | ||
* quadiron_fnt backend implementation | ||
* | ||
* vi: set noai tw=79 ts=4 sw=4: | ||
*/ | ||
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#include <stdio.h> | ||
#include <stdlib.h> | ||
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#include "erasurecode.h" | ||
#include "erasurecode_backend.h" | ||
#include "erasurecode_helpers.h" | ||
#include "erasurecode_helpers_ext.h" | ||
#include "quadiron_fnt_common.h" | ||
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typedef void (*quadiron_hex_dump_func)(char *buf, int buf_size); | ||
quadiron_hex_dump_func quadiron_hex_dump; | ||
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int quadiron_fnt_encode(void *desc, char **data, char **parity, | ||
int blocksize) | ||
{ | ||
quadiron_fnt_descriptor *qdesc = (quadiron_fnt_descriptor*) desc; | ||
int qwanted_idxs[qdesc->k + qdesc->m]; | ||
unsigned int i; | ||
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for (i = 0; i < qdesc->k + qdesc->m; i++) { | ||
qwanted_idxs[i] = 1; | ||
} | ||
return qdesc->fnt32_encode_func(qdesc->fec, | ||
data, parity, qwanted_idxs, blocksize); | ||
} | ||
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int quadiron_fnt_decode(void *desc, char **data, char **parity, | ||
int *missing_idxs, int blocksize) | ||
{ | ||
quadiron_fnt_descriptor *qdesc = (quadiron_fnt_descriptor*)desc; | ||
int qmissing_idxs[qdesc->k + qdesc->m]; | ||
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convert_idx_list_to_bitvalues(missing_idxs, qmissing_idxs, | ||
qdesc->k + qdesc->m); | ||
return qdesc->fnt32_decode_func(qdesc->fec, | ||
data, parity, qmissing_idxs, | ||
blocksize); | ||
} | ||
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int quadiron_fnt_reconstruct(void *desc, char **data, char **parity, | ||
int *missing_idxs, int destination_idx, int blocksize) | ||
{ | ||
quadiron_fnt_descriptor *qdesc = (quadiron_fnt_descriptor*)desc; | ||
int qmissing_idxs[qdesc->k + qdesc->m]; | ||
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convert_idx_list_to_bitvalues(missing_idxs, qmissing_idxs, | ||
qdesc->k + qdesc->m); | ||
return qdesc->fnt32_reconstruct_func(qdesc->fec, | ||
data, parity, qmissing_idxs, | ||
destination_idx, | ||
blocksize); | ||
} | ||
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int quadiron_fnt_min_fragments(void *desc, int *missing_idxs, | ||
int *fragments_to_exclude, int *fragments_needed) | ||
{ | ||
quadiron_fnt_descriptor *qdesc = (quadiron_fnt_descriptor*) desc; | ||
int qexclude[qdesc->k + qdesc->m]; | ||
int qmissing[qdesc->k + qdesc->m]; | ||
int i; | ||
int j = 0; | ||
int ret = -1; | ||
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convert_idx_list_to_bitvalues(fragments_to_exclude, qexclude, qdesc->k + qdesc->m); | ||
convert_idx_list_to_bitvalues(missing_idxs, qmissing, qdesc->k + qdesc->m); | ||
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for (i = 0; i < (qdesc->k + qdesc->m); i++) { | ||
if (!(qmissing[i])) { | ||
fragments_needed[j] = i; | ||
j++; | ||
} | ||
if (j == qdesc->k) { | ||
ret = 0; | ||
fragments_needed[j] = -1; | ||
break; | ||
} | ||
} | ||
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return ret; | ||
} | ||
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/** | ||
* Return the element-size, which is the number of bits stored | ||
* on a given device, per codeword. | ||
* | ||
* Returns the size in bits! | ||
*/ | ||
int quadiron_fnt_element_size(void* desc) | ||
{ | ||
return 8; | ||
} | ||
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int quadiron_fnt_exit(void *desc) | ||
{ | ||
quadiron_fnt_descriptor *quadiron_fnt_desc = NULL; | ||
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quadiron_fnt_desc = (quadiron_fnt_descriptor*) desc; | ||
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quadiron_fnt_desc->fnt32_delete_func(quadiron_fnt_desc->fec); | ||
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free(quadiron_fnt_desc); | ||
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return 0; | ||
} | ||
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size_t quadiron_fnt_common_get_metadata_size(void *desc, int block_size) | ||
{ | ||
quadiron_fnt_descriptor *quadiron_fnt_desc = NULL; | ||
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quadiron_fnt_desc = (quadiron_fnt_descriptor*) desc; | ||
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return quadiron_fnt_desc->fnt32_get_metadata_size_func(quadiron_fnt_desc->fec, block_size); | ||
} | ||
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size_t quadiron_fnt_common_get_encode_offset(void *desc, int metadata_size) | ||
{ | ||
return metadata_size; | ||
} | ||
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void * quadiron_fnt_common_init(struct ec_backend_args *args, void *backend_sohandle, | ||
int systematic) | ||
{ | ||
quadiron_fnt_descriptor *desc = NULL; | ||
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desc = (quadiron_fnt_descriptor *)malloc(sizeof(quadiron_fnt_descriptor)); | ||
if (NULL == desc) { | ||
return NULL; | ||
} | ||
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desc->k = args->uargs.k; | ||
desc->m = args->uargs.m; | ||
desc->w = args->uargs.w; | ||
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/* validate EC arguments */ | ||
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/* | ||
* ISO C forbids casting a void* to a function pointer. | ||
* Since dlsym return returns a void*, we use this union to | ||
* "transform" the void* to a function pointer. | ||
*/ | ||
union { | ||
quadiron_fnt32_new_func quadiron_fnt32_new_funcp; | ||
quadiron_fnt32_delete_func quadiron_fnt32_delete_funcp; | ||
quadiron_fnt32_encode_func quadiron_fnt32_encode_funcp; | ||
quadiron_fnt32_decode_func quadiron_fnt32_decode_funcp; | ||
quadiron_fnt32_reconstruct_func quadiron_fnt32_reconstruct_funcp; | ||
quadiron_fnt32_get_metadata_size_func quadiron_fnt32_get_metadata_size_funcp; | ||
quadiron_hex_dump_func quadiron_hex_dump_funcp; | ||
void *vptr; | ||
} func_handle = {.vptr = NULL}; | ||
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/* fill in function addresses */ | ||
func_handle.vptr = NULL; | ||
func_handle.vptr = dlsym(backend_sohandle, "quadiron_fnt32_new"); | ||
desc->fnt32_new_func = func_handle.quadiron_fnt32_new_funcp; | ||
if (NULL == desc->fnt32_new_func) { | ||
goto error; | ||
} | ||
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func_handle.vptr = NULL; | ||
func_handle.vptr = dlsym(backend_sohandle, "quadiron_fnt32_delete"); | ||
desc->fnt32_delete_func = func_handle.quadiron_fnt32_delete_funcp; | ||
if (NULL == desc->fnt32_delete_func) { | ||
goto error; | ||
} | ||
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func_handle.vptr = NULL; | ||
func_handle.vptr = dlsym(backend_sohandle, "quadiron_fnt32_encode"); | ||
desc->fnt32_encode_func = func_handle.quadiron_fnt32_encode_funcp; | ||
if (NULL == desc->fnt32_encode_func) { | ||
goto error; | ||
} | ||
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func_handle.vptr = NULL; | ||
func_handle.vptr = dlsym(backend_sohandle, "quadiron_fnt32_decode"); | ||
desc->fnt32_decode_func = func_handle.quadiron_fnt32_decode_funcp; | ||
if (NULL == desc->fnt32_decode_func) { | ||
goto error; | ||
} | ||
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func_handle.vptr = NULL; | ||
func_handle.vptr = dlsym(backend_sohandle, "quadiron_fnt32_reconstruct"); | ||
desc->fnt32_reconstruct_func = func_handle.quadiron_fnt32_reconstruct_funcp; | ||
if (NULL == desc->fnt32_reconstruct_func) { | ||
goto error; | ||
} | ||
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func_handle.vptr = NULL; | ||
func_handle.vptr = dlsym(backend_sohandle, "quadiron_fnt32_get_metadata_size"); | ||
desc->fnt32_get_metadata_size_func = func_handle.quadiron_fnt32_get_metadata_size_funcp; | ||
if (NULL == desc->fnt32_get_metadata_size_func) { | ||
goto error; | ||
} | ||
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func_handle.vptr = dlsym(backend_sohandle, "quadiron_hex_dump"); | ||
quadiron_hex_dump = func_handle.quadiron_hex_dump_funcp; | ||
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desc->fec = desc->fnt32_new_func(args->uargs.w / 8, args->uargs.k, | ||
args->uargs.m, systematic); | ||
if (NULL == desc->fec) { | ||
goto error; | ||
} | ||
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return desc; | ||
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error: | ||
free(desc); | ||
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return NULL; | ||
} |
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