osdc: Interface to submit IO with ASIO Post.

For direct read failures, the locking is such that we cannot
immediately send a new IO without deadlocking. This new interface
allows an op to be sent as an asio post.

Signed-off-by: Alex Ainscow <[email protected]>

Author: aainscow

src/osdc/Objecter.cc

@@ -2337,6 +2337,13 @@ void Objecter::resend_mon_ops()
 
 // read | write ---------------------------
 
+
+void Objecter::op_post_submit(Op* op) {
+  boost::asio::post(service, [this, op]() {
+    op_submit(op);
+  });
+}
+
 void Objecter::op_submit(Op *op, ceph_tid_t *ptid, int *ctx_budget)
 {
   shunique_lock rl(rwlock, ceph::acquire_shared);

src/osdc/Objecter.h

@@ -2808,6 +2808,7 @@ class Objecter : public md_config_obs_t, public Dispatcher {
 			      int *ctx_budget = NULL);
   // public interface
 public:
+  void op_post_submit(Op *op);
   void op_submit(Op *op, ceph_tid_t *ptid = NULL, int *ctx_budget = NULL);
   bool is_active() {
     std::shared_lock l(rwlock);