From 7fcbe6ac74f7a957d0be810401b93c30e7831bd8 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Fri, 10 Jul 2015 23:29:59 +0100
Subject: Basic WIP support for Glacier2 routing

---
 netfs/fuse/Jamfile.jam       |  3 +++
 netfs/fuse/fuseApp.cpp       | 27 ++++++++++++++++++++++++++
 netfs/fuse/fuseApp.h         |  4 ++++
 netfs/unittests/testCore.cpp | 45 +++++++++++++++++++++++++++++++++++++++++---
 4 files changed, 76 insertions(+), 3 deletions(-)

diff --git a/netfs/fuse/Jamfile.jam b/netfs/fuse/Jamfile.jam
index c5d3a7a..b0f04d6 100644
--- a/netfs/fuse/Jamfile.jam
+++ b/netfs/fuse/Jamfile.jam
@@ -1,4 +1,5 @@
 lib fuse : : <name>fuse ;
+lib Glacier2 : : <name>Glacier2 ;
 
 cpp-pch pch : pch.hpp :
 	<define>_FILE_OFFSET_BITS=64
@@ -43,6 +44,7 @@ lib netfsClient :
 	<library>..//boost_thread
 	<library>..//boost_system
 	<library>..//Ice
+	<library>Glacier2
 	<library>..//IceUtil
 	<library>..//pthread
 	<library>..//slicer
@@ -52,6 +54,7 @@ lib netfsClient :
 	<include>.
 	<include>../../libfusepp
 	<library>../ice//netfsComms
+	<library>Glacier2
 	<implicit-dependency>../ice//netfsComms
 	<library>netfsClientConfiguration
 	<implicit-dependency>netfsClientConfiguration
diff --git a/netfs/fuse/fuseApp.cpp b/netfs/fuse/fuseApp.cpp
index 940d0e6..0e7f941 100644
--- a/netfs/fuse/fuseApp.cpp
+++ b/netfs/fuse/fuseApp.cpp
@@ -1,4 +1,5 @@
 #include <pch.hpp>
+#include <Glacier2/Router.h>
 #include <string.h>
 #include "fuseApp.h"
 #include "lockHelpers.h"
@@ -13,6 +14,7 @@ template class OptimisticCallCacheable<struct stat, std::string, IceUtil::Shared
 NetFS::FuseApp::FuseApp(int & argc, char ** argv) :
 	_argc(argc),
 	_argv(argv),
+	sessionOpened(false),
 	openDirID(0),
 	openFileID(0)
 {
@@ -29,6 +31,9 @@ NetFS::FuseApp::~FuseApp()
 	if (volume) {
 		volume->disconnect();
 	}
+	if (session) {
+		session->destroy();
+	}
 	if (ic) {
 		ic->destroy();
 	}
@@ -73,6 +78,17 @@ NetFS::FuseApp::opt_parse(void *, const char * arg, int, struct fuse_args *)
 	return 1;
 }
 
+void
+NetFS::FuseApp::connectSession()
+{
+	if (!sessionOpened && ic->getDefaultRouter()) {
+		Lock(_lock);
+		auto router = Glacier2::RouterPrx::checkedCast(ic->getDefaultRouter());
+		session = router->createSession("", "");
+		sessionOpened = true;
+	}
+}
+
 void
 NetFS::FuseApp::connectToService()
 {
@@ -134,6 +150,15 @@ void
 NetFS::FuseApp::verifyConnection()
 {
 	Lock(_lock);
+	if (session) {
+		try {
+			session->ice_ping();
+		}
+		catch (const Ice::Exception &) {
+			session = NULL;
+			sessionOpened = false;
+		}
+	}
 	if (service) {
 		try {
 			service->ice_ping();
@@ -157,6 +182,7 @@ NetFS::FuseApp::onError(const std::exception & e) throw()
 {
 	if (dynamic_cast<const Ice::ObjectNotExistException *>(&e)) {
 		verifyConnection();
+		connectSession();
 		connectToService();
 		connectToVolume();
 		connectHandles();
@@ -168,6 +194,7 @@ NetFS::FuseApp::onError(const std::exception & e) throw()
 NetFS::ReqEnv
 NetFS::FuseApp::reqEnv()
 {
+	connectSession();
 	connectToService();
 	connectToVolume();
 	struct fuse_context * c = fuse_get_context();
diff --git a/netfs/fuse/fuseApp.h b/netfs/fuse/fuseApp.h
index e514b55..335a1c0 100644
--- a/netfs/fuse/fuseApp.h
+++ b/netfs/fuse/fuseApp.h
@@ -3,6 +3,7 @@
 
 #include <boost/thread/shared_mutex.hpp>
 #include <Ice/Ice.h>
+#include <Glacier2/Session.h>
 #include <service.h>
 #include "fuseAppBase.h"
 #include "fuseConfig.h"
@@ -40,6 +41,7 @@ namespace NetFS {
 			void * init (struct fuse_conn_info * info);
 			int opt_parse(void *, const char * arg, int key, struct fuse_args *);
 
+			void connectSession();
 			void connectToService();
 			void connectToVolume();
 			void connectHandles();
@@ -102,6 +104,8 @@ namespace NetFS {
 
 			NetFS::VolumePrx volume;
 			NetFS::ServicePrx service;
+			Glacier2::SessionPrx session;
+			bool sessionOpened;
 
 			std::string mountPoint;
 			std::string resourceName;
diff --git a/netfs/unittests/testCore.cpp b/netfs/unittests/testCore.cpp
index 02405d9..b19c453 100644
--- a/netfs/unittests/testCore.cpp
+++ b/netfs/unittests/testCore.cpp
@@ -1,6 +1,8 @@
 #define BOOST_TEST_MODULE TestNetFSCore
 #include <boost/test/unit_test.hpp>
 #include <boost/filesystem/operations.hpp>
+#include <boost/lexical_cast.hpp>
+#include <boost/scope_exit.hpp>
 #include <Ice/ObjectAdapter.h>
 #include <Ice/Service.h>
 #include <daemon.h>
@@ -37,8 +39,8 @@ class MockDaemon : public NetFSDaemon {
 
 class MockDaemonHost {
 	public:
-		MockDaemonHost() :
-			params({}),
+		MockDaemonHost(const Ice::StringSeq & ps = {}) :
+			params(ps),
 			ic(Ice::initialize(params)),
 			daemon(new MockDaemon())
 		{
@@ -121,6 +123,19 @@ class FuseMockHost {
 			FuseAppBase::run(argc, a, app);
 		}
 
+		FuseMockHost(int c, char ** v) :
+			argc(c),
+			app(new FuseMock(c, v)),
+			fuse(&app->ops)
+		{
+			FuseAppBase::run(argc, v, app);
+		}
+
+		~FuseMockHost()
+		{
+			delete app;
+		}
+
 		int argc;
 		FuseMock * app;
 		fuse_operations * fuse;
@@ -176,7 +191,6 @@ BOOST_AUTO_TEST_CASE ( clientInitialised )
 
 BOOST_AUTO_TEST_SUITE_END();
 
-
 BOOST_AUTO_TEST_CASE ( createAndDaemonRestart )
 {
 	MockDaemonHostPtr daemon(new MockDaemonHost());
@@ -219,3 +233,28 @@ BOOST_AUTO_TEST_CASE ( createAndDaemonRestart )
 	BOOST_REQUIRE_EQUAL(0, fuse.fuse->release(fileName, &fh));
 }
 
+BOOST_AUTO_TEST_CASE ( withRouter )
+{
+	BOOST_REQUIRE_EQUAL(0,
+		system("/usr/bin/glacier2router --Glacier2.Client.Endpoints='tcp -p 4063' --Glacier2.PermissionsVerifier=Glacier2/NullPermissionsVerifier --daemon --pidfile /tmp/glacier.pid"));
+	sleep(1);
+
+	BOOST_SCOPE_EXIT(void) {
+		system("kill $(cat /tmp/glacier.pid)");
+	} BOOST_SCOPE_EXIT_END;
+
+	{
+		char * argv[] = {
+			strdup((RootDir / ":testvol").string().c_str()),
+			strdup((RootDir / "test").string().c_str()),
+			strdup("--Ice.Default.Router=Glacier2/router:tcp -h localhost -p 4063")
+		};
+
+		MockDaemonHostPtr daemon(new MockDaemonHost());
+		FuseMockHost fuse(3, argv);
+
+		struct statvfs s;
+		BOOST_REQUIRE_EQUAL(0, fuse.fuse->statfs("/",  &s));
+	}
+}
+
-- 
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