From 45aa18ac4c26d8845dfa9ccd7ff566f385ae30ea Mon Sep 17 00:00:00 2001
From: Pawel Dziepak <pdziepak@quarnos.org>
Date: Wed, 30 May 2012 22:48:53 +0200
Subject: [PATCH] nfs4: Add stub Filesystem class and Mount method

---
 .../kernel/file_systems/nfs4/Filesystem.cpp   | 118 ++++++++++++++++++
 .../kernel/file_systems/nfs4/Filesystem.h     |  36 ++++++
 src/add-ons/kernel/file_systems/nfs4/Jamfile  |   1 +
 .../kernel/file_systems/nfs4/NFS4Defs.h       |   3 +
 4 files changed, 158 insertions(+)
 create mode 100644 src/add-ons/kernel/file_systems/nfs4/Filesystem.cpp
 create mode 100644 src/add-ons/kernel/file_systems/nfs4/Filesystem.h

diff --git a/src/add-ons/kernel/file_systems/nfs4/Filesystem.cpp b/src/add-ons/kernel/file_systems/nfs4/Filesystem.cpp
new file mode 100644
index 0000000000..402e67bbe0
--- /dev/null
+++ b/src/add-ons/kernel/file_systems/nfs4/Filesystem.cpp
@@ -0,0 +1,118 @@
+/*
+ * Copyright 2012 Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Paweł Dziepak, pdziepak@quarnos.org
+ */
+
+
+#include "Filesystem.h"
+
+#include <string.h>
+
+#include "ReplyInterpreter.h"
+#include "RequestBuilder.h"
+
+
+Filesystem::Filesystem()
+{
+}
+
+
+Filesystem::~Filesystem()
+{
+}
+
+
+status_t
+Filesystem::Mount(Filesystem** pfs, RPC::Server* serv, const char* fsPath)
+{
+	RequestBuilder req(ProcCompound);
+	req.PutRootFH();
+
+	// Better way of doing this will be needed
+	uint32 lookupCount;
+	char* path = strdup(fsPath);
+	char* pathStart = path;
+	char* pathEnd;
+	while (pathStart != NULL) {
+		pathEnd = strpbrk(pathStart, "/");
+		if (pathEnd != NULL)
+			*pathEnd = '\0';
+
+		req.LookUp(pathStart);
+
+		if (pathEnd != NULL && pathEnd[1] != '\0')
+			pathStart = pathEnd + 1;
+		else
+			pathStart = NULL;
+
+		lookupCount++;
+	}
+	free(path);
+
+	req.GetFH();
+	req.Access();
+	Attribute attr[] = { FATTR4_FH_EXPIRE_TYPE };
+	req.GetAttr(attr, sizeof(attr) / sizeof(Attribute));
+
+	RPC::Reply *rpl;
+	serv->SendCall(req.Request(), &rpl);
+	ReplyInterpreter reply(rpl);
+
+	status_t result;
+
+	result = reply.PutRootFH();
+	if (result != B_OK)
+		return result;
+
+	for (uint32 i = 0; i < lookupCount; i++) {
+		result = reply.LookUp();
+		if (result != B_OK)
+			return result;
+	}
+
+	Filehandle fh;
+	result = reply.GetFH(&fh);
+	if (result != B_OK)
+		return result;
+
+	uint32 allowed;
+	result = reply.Access(NULL, &allowed);
+	if (result != B_OK)
+		return result;
+	else if (allowed & (ACCESS4_READ | ACCESS4_LOOKUP)
+				!= (ACCESS4_READ | ACCESS4_LOOKUP))
+		return B_PERMISSION_DENIED;
+
+	AttrValue* values;
+	uint32 count;
+	result = reply.GetAttr(&values, &count);
+	if (result != B_OK)
+		return result;
+
+	if (count != 1 || values[0].fAttribute != FATTR4_FH_EXPIRE_TYPE) {
+		delete values;
+		return B_BAD_VALUE;
+	}
+
+	// Currently, only persistent filehandles are supported. That will be
+	// changed soon.
+	if (values[0].fData.fValue32 != FH4_PERSISTENT) {
+		delete values;
+		return B_UNSUPPORTED;
+	}
+
+	Filesystem* fs = new Filesystem;
+	fs->fFHExpiryType = values[0].fData.fValue32;
+	memcpy(&fs->fRootFH, &fh, sizeof(Filehandle));
+	fs->fServer = serv;
+
+	delete values;
+
+	*pfs = fs;
+
+	return B_OK;
+}
+
diff --git a/src/add-ons/kernel/file_systems/nfs4/Filesystem.h b/src/add-ons/kernel/file_systems/nfs4/Filesystem.h
new file mode 100644
index 0000000000..7489f2e702
--- /dev/null
+++ b/src/add-ons/kernel/file_systems/nfs4/Filesystem.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2012 Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Paweł Dziepak, pdziepak@quarnos.org
+ */
+#ifndef FILESYSTEM_H
+#define FILESYSTEM_H
+
+
+#include "NFS4Defs.h"
+#include "RPCServer.h"
+
+
+class Filesystem {
+public:
+	static	status_t		Mount(Filesystem** pfs, RPC::Server* serv,
+								const char* path);
+							~Filesystem();
+
+	inline	uint32			FHExpiryType() const;
+
+private:
+							Filesystem();
+
+			uint32			fFHExpiryType;
+
+			Filehandle		fRootFH;
+
+			RPC::Server*	fServer;
+};
+
+
+#endif	// FILESYSTEM_H
+
diff --git a/src/add-ons/kernel/file_systems/nfs4/Jamfile b/src/add-ons/kernel/file_systems/nfs4/Jamfile
index e58c558db9..bab7e6c8b8 100644
--- a/src/add-ons/kernel/file_systems/nfs4/Jamfile
+++ b/src/add-ons/kernel/file_systems/nfs4/Jamfile
@@ -4,6 +4,7 @@ UsePrivateHeaders kernel ;
 
 KernelAddon nfs4 :
 	Connection.cpp
+	Filesystem.cpp
 	kernel_interface.cpp
 	ReplyInterpreter.cpp
 	RequestBuilder.cpp
diff --git a/src/add-ons/kernel/file_systems/nfs4/NFS4Defs.h b/src/add-ons/kernel/file_systems/nfs4/NFS4Defs.h
index 2762d5f114..b1a4ec7e0f 100644
--- a/src/add-ons/kernel/file_systems/nfs4/NFS4Defs.h
+++ b/src/add-ons/kernel/file_systems/nfs4/NFS4Defs.h
@@ -9,6 +9,9 @@
 #define NFS4DEFS_H
 
 
+#include <SupportDefs.h>
+
+
 #define NFS4_FHSIZE	128
 
 struct Filehandle {