Added functionality needed to support the get_segment_info() API in PyECLib.

2 files changed, 17 insertions, 0 deletions

diff --git a/include/erasurecode/erasurecode.h b/include/erasurecode/erasurecode.h
index 38c50d3..c92c9e4 100644
--- a/include/erasurecode/erasurecode.h
+++ b/include/erasurecode/erasurecode.h
@@ -194,6 +194,21 @@ int liberasurecode_get_fragment_metadata(char *fragment);
  */
 int liberasurecode_verify_stripe_metadata(char **fragments);
 
+/**
+ * This computes the aligned size of a buffer passed into 
+ * the encode function.  The encode function must pad fragments
+ * to be algined with the word size (w) and the last fragment also
+ * needs to be aligned.  This computes the sum of the algined fragment
+ * sizes for a given buffer to encode.
+ */
+int liberasurecode_get_aligned_data_size(int desc, int data_len);
+ 
+/**
+ * This will return the minumum encode size, which is the minimum
+ * buffer size that can be encoded.
+ */
+int liberasurecode_get_minimum_encode_size(int desc);
+
 
 /* ==~=*=~===~=*=~==~=*=~== liberasurecode Error codes =~=*=~==~=~=*=~==~== */
 
diff --git a/include/erasurecode/erasurecode_backend.h b/include/erasurecode/erasurecode_backend.h
index bf35e0d..c5ead2a 100644
--- a/include/erasurecode/erasurecode_backend.h
+++ b/include/erasurecode/erasurecode_backend.h
@@ -58,6 +58,7 @@ struct ec_backend_args {
 #define DECODE          decode
 #define FRAGSNEEDED     fragments_needed
 #define RECONSTRUCT     reconstruct
+#define ELEMENTSIZE     element_size
 
 #define FN_NAME(s)      str(s)
 #define str(s)          #s
@@ -82,6 +83,7 @@ struct ec_backend_op_stubs {
     int (*RECONSTRUCT)(void *desc,
             char **data, char **parity, int *missing_idxs, int destination_idx,
             int blocksize);
+    int (*ELEMENTSIZE)(void *desc);
 };
 
 /* ==~=*=~==~=*=~==~=*=~= backend struct definitions =~=*=~==~=*=~==~=*==~== */