diff options
Diffstat (limited to 'include/erasurecode/erasurecode_backend.h')
| -rw-r--r-- | include/erasurecode/erasurecode_backend.h | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/include/erasurecode/erasurecode_backend.h b/include/erasurecode/erasurecode_backend.h index 4199344..2cf7094 100644 --- a/include/erasurecode/erasurecode_backend.h +++ b/include/erasurecode/erasurecode_backend.h @@ -1,4 +1,4 @@ -/* +/* * <Copyright> * * Redistribution and use in source and binary forms, with or without @@ -64,6 +64,8 @@ struct ec_backend_args { #define RECONSTRUCT reconstruct #define ELEMENTSIZE element_size #define ISCOMPATIBLEWITH is_compatible_with +#define GETMETADATASIZE get_backend_metadata_size +#define GETENCODEOFFSET get_encode_offset #define FN_NAME(s) str(s) #define str(s) #s @@ -90,7 +92,10 @@ struct ec_backend_op_stubs { int blocksize); int (*ELEMENTSIZE)(void *desc); - bool (*ISCOMPATIBLEWITH) (uint32_t version); + bool (*ISCOMPATIBLEWITH)(uint32_t version); + + size_t (*GETMETADATASIZE)(void *desc, int blocksize); + size_t (*GETENCODEOFFSET)(void *desc, int metadata_size); }; /* ==~=*=~==~=*=~==~=*=~= backend struct definitions =~=*=~==~=*=~==~=*==~== */ @@ -109,11 +114,6 @@ struct ec_backend_common { char soversion[MAX_LEN]; /* EC backend shared library version */ struct ec_backend_op_stubs *ops; /* EC backend stubs */ - size_t backend_metadata_size; - /* EC backend custom metadata size - - * backend_metadata_size bytes are added to - * the fragment size when allocating - * data/parity fragment buffers */ uint32_t ec_backend_version; /* The revision number of this back * end. Is used to determine whether * a specific instance of this backend @@ -162,6 +162,21 @@ ec_backend_t liberasurecode_backend_lookup_by_name(const char *name); */ ec_backend_t liberasurecode_backend_instance_get_by_desc(int desc); +/* Common function for backends */ +/** + * A function to return 0 for generic usage on backends for get_encode_offset + * + * Returns 0 always + */ +static inline size_t get_encode_offset_zero(void *desc, int metadata_size){ return 0; } + +/** + * A function to return 0 for generic usage on backends for get_backend_metadata_size + * + * Returns 0 always + */ +static inline size_t get_backend_metadata_size_zero(void *desc, int blocksize){ return 0; } + /* =~=*=~==~=*=~==~=*=~==~=*=~===~=*=~==~=*=~===~=*=~==~=*=~===~=*=~==~=*=~= */ #ifdef __cplusplus |