Add encode postprocessing, checksum helpers

Signed-off-by: Tushar Gohad <tushar.gohad@intel.com>

1 files changed, 69 insertions, 0 deletions

diff --git a/src/erasurecode_postprocessing.c b/src/erasurecode_postprocessing.c
new file mode 100644
index 0000000..e086f2c
--- /dev/null
+++ b/src/erasurecode_postprocessing.c
@@ -0,0 +1,69 @@
+/*
+ * <Copyright>
+ *
+ * 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.
+ *
+ * liberasurecode postprocessing helpers implementation
+ *
+ * vi: set noai tw=79 ts=4 sw=4:
+ */
+
+#include "erasurecode_backend.h"
+#include "erasurecode_helpers.h"
+#include "erasurecode_stdinc.h"
+
+int finalize_fragments_after_encode(ec_backend_t instance,
+        int k, int m, int blocksize,
+        char **encoded_data, char **encoded_parity)
+{
+    int i;
+    // int add_checksum = instance->args.uargs.inline_chksum;
+    int add_checksum = 1;
+    char *fragment = get_fragment_ptr_from_data(encoded_parity[0]);
+printf ("fragment = %p\n", fragment);
+    fragment = get_fragment_ptr_from_data(encoded_parity[1]);
+printf ("fragment = %p\n", fragment);
+
+    /* finalize data fragments */
+    for (i = 0; i < k; i++) {
+        char *fragment = get_fragment_ptr_from_data(encoded_data[i]);
+        set_fragment_idx(fragment, i);
+        if (add_checksum) {
+            int chksum = crc32(0, encoded_data[i], blocksize);
+            set_chksum(fragment, chksum);
+        }
+        encoded_data[i] = fragment;
+    }
+
+    /* finalize parity fragments */
+    for (i = 0; i < m; i++) {
+        char *fragment = get_fragment_ptr_from_data(encoded_parity[i]);
+        set_fragment_idx(fragment, i + k);
+        if (add_checksum) {
+            int chksum = crc32(0, encoded_parity[i], blocksize);
+            set_chksum(fragment, chksum);
+        }
+        encoded_parity[i] = fragment;
+    }
+
+    return 0;
+}
+