mon: 'osd pool rename <oldname> <newname>'

Signed-off-by: Sage Weil <sage@inktank.com>

3 files changed, 29 insertions, 1 deletions

diff --git a/doc/control.rst b/doc/control.rst
index b43767a1301..3dedfa1ecc3 100644
--- a/doc/control.rst
+++ b/doc/control.rst
@@ -226,8 +226,9 @@ Creates/deletes a snapshot of a pool. ::
 
 	$ ceph osd pool create POOL [pg_num [pgp_num]]
 	$ ceph osd pool delete POOL
+        $ ceph osd pool rename OLDNAME NEWNAME
 
-Creates/deletes a storage pool. ::
+Creates/deletes/renames a storage pool. ::
 
 	$ ceph osd pool set POOL FIELD VALUE
 
diff --git a/src/mon/OSDMonitor.cc b/src/mon/OSDMonitor.cc
index 66c6b898ff0..e819a112fef 100644
--- a/src/mon/OSDMonitor.cc
+++ b/src/mon/OSDMonitor.cc
@@ -2282,6 +2282,20 @@ bool OSDMonitor::prepare_command(MMonCommand *m)
 	  paxos->wait_for_commit(new Monitor::C_Command(mon, m, ret, rs, paxos->get_version()));
 	  return true;
 	}
+      } else if (m->cmd[2] == "rename" && m->cmd.size() == 5) {
+	int64_t pool = osdmap.lookup_pg_pool_name(m->cmd[3].c_str());
+	if (pool < 0) {
+	  ss << "unrecognized pool '" << m->cmd[3] << "'";
+	  err = -ENOENT;
+	} else {
+	  int ret = _prepare_rename_pool(pool, m->cmd[4]);
+	  if (ret == 0) {
+	    ss << "pool '" << m->cmd[3] << "' renamed to '" << m->cmd[4] << "'";
+	    getline(ss, rs);
+	    paxos->wait_for_commit(new Monitor::C_Command(mon, m, ret, rs, paxos->get_version()));
+	    return true;
+	  }
+	}
       } else if (m->cmd[2] == "set") {
 	if (m->cmd.size() != 6) {
 	  err = -EINVAL;
@@ -2629,6 +2643,18 @@ int OSDMonitor::_prepare_remove_pool(uint64_t pool)
   return 0;
 }
 
+int OSDMonitor::_prepare_rename_pool(uint64_t pool, string newname)
+{
+  dout(10) << "_prepare_rename_pool " << pool << dendl;
+  if (pending_inc.old_pools.count(pool)) {
+    dout(10) << "_prepare_rename_pool " << pool << " pending removal" << dendl;    
+    return -ENOENT;
+  }
+
+  pending_inc.new_pool_names[pool] = newname;
+  return 0;
+}
+
 bool OSDMonitor::prepare_pool_op_delete(MPoolOp *m)
 {
   int ret = _prepare_remove_pool(m->pool);
diff --git a/src/mon/OSDMonitor.h b/src/mon/OSDMonitor.h
index e9081dcb40e..f40def412e3 100644
--- a/src/mon/OSDMonitor.h
+++ b/src/mon/OSDMonitor.h
@@ -105,6 +105,7 @@ private:
   bool prepare_pgtemp(class MOSDPGTemp *m);
 
   int _prepare_remove_pool(uint64_t pool);
+  int _prepare_rename_pool(uint64_t pool, string newname);
 
   bool preprocess_pool_op ( class MPoolOp *m);
   bool preprocess_pool_op_create ( class MPoolOp *m);