[t:2350] Change BRT_LAYOUT_VERSION 11->12 to support new brt message BRT_INSERT_NO_OVERWRITE

git-svn-id: file:///svn/toku/tokudb@17701 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/brt-internal.h

@@ -325,6 +325,7 @@ enum brt_layout_version_e {
     BRT_LAYOUT_VERSION_9 = 9,   // Diff from 8 to 9:  Variable-sized blocks and compression.
     BRT_LAYOUT_VERSION_10 = 10, // Diff from 9 to 10: Variable number of compressed sub-blocks per block, disk byte order == intel byte order, Subtree estimates instead of just leafentry estimates, translation table, dictionary descriptors, checksum in header, subdb support removed from brt layer
     BRT_LAYOUT_VERSION_11 = 11, // Diff from 10 to 11: Nested transaction leafentries (completely redesigned).  BRT_CMDs on disk now support XIDS (multiple txnids) instead of exactly one.
+    BRT_LAYOUT_VERSION_12 = 12, // Diff from 11 to 12: Added BRT_CMD 'BRT_INSERT_NO_OVERWRITE'
     BRT_NEXT_VERSION,           // the version after the current version
     BRT_LAYOUT_VERSION   = BRT_NEXT_VERSION-1, // A hack so I don't have to change this line.
     BRT_LAYOUT_MIN_SUPPORTED_VERSION = BRT_LAYOUT_VERSION // Minimum version supported without transparent upgrade

newbrt/brt-serialize.c

@@ -1112,6 +1112,7 @@ static u_int32_t
 serialize_brt_header_min_size (u_int32_t version) {
     u_int32_t size = 0;
     switch(version) {
+        case BRT_LAYOUT_VERSION_12:
         case BRT_LAYOUT_VERSION_11:
 	    size += 4;  // original_version
 	    // fall through to add up bytes in previous version