Do not skip RMW at the end of the file - skipping it may lead to data corruption (fix #116)

src/nfs/nfs_kv_write.cpp

@@ -505,13 +505,6 @@ static void nfs_do_align_write(nfs_kv_write_state *st, uint64_t ino, uint64_t of
     {
         // Requires read-modify-write in the end
         assert(st->offset+st->size <= st->new_size);
-        if (st->offset+st->size == st->new_size)
-        {
-            // rmw can be skipped at end - we can just zero pad the request
-            end_pad = alignment - (end % alignment);
-        }
-        else
-        {
         auto s = (end % alignment);
         if (good_size > s)
             good_size -= s;
@@ -533,7 +526,6 @@ static void nfs_do_align_write(nfs_kv_write_state *st, uint64_t ino, uint64_t of
         st->waiting++;
         nfs_do_rmw(&st->rmw[1]);
     }
-    }
     if (good_size > 0 || end_pad > 0 || begin_shdr)
     {
         // Normal write