Add osd header and osd executable

osd_main.cpp

@@ -0,0 +1,27 @@
+#include "osd.h"
+
+int main(int narg, char *args[])
+{
+    if (sizeof(osd_any_op_t) >= OSD_OP_PACKET_SIZE ||
+        sizeof(osd_any_reply_t) >= OSD_REPLY_PACKET_SIZE)
+    {
+        perror("BUG: too small packet size");
+        return 1;
+    }
+    blockstore_config_t config;
+    config["meta_device"] = "./test_meta.bin";
+    config["journal_device"] = "./test_journal.bin";
+    config["data_device"] = "./test_data.bin";
+    ring_loop_t *ringloop = new ring_loop_t(512);
+    blockstore *bs = new blockstore(config, ringloop);
+    osd_t *osd = new osd_t(config, bs, ringloop);
+    while (1)
+    {
+        ringloop->loop();
+        ringloop->wait();
+    }
+    delete osd;
+    delete bs;
+    delete ringloop;
+    return 0;
+}