nfs4: Make buildable under userlandfs

* Adjust some nfs4 code depending on _KERNEL_MODE / USER.
* Add several functions needed by this driver to kernelland_emu.
* Fixes #15556.

Change-Id: I36c1727d9cff088aa93870806bfe69b46dbdd4e2
Reviewed-on: https://review.haiku-os.org/c/haiku/+/8712
Reviewed-by: waddlesplash <[email protected]>

src/add-ons/kernel/file_systems/nfs4/Connection.cpp

@@ -11,13 +11,18 @@
 
 #include <arpa/inet.h>
 #include <errno.h>
+#ifdef USER
+#include <netdb.h>
+#endif
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
 #include <AutoDeleter.h>
+#ifdef _KERNEL_MODE
 #include <net/dns_resolver.h>
+#endif
 #include <util/kernel_cpp.h>
 #include <util/Random.h>
 
@@ -221,7 +226,8 @@ AddressResolver::AddressResolver(const char* name)
 
 AddressResolver::~AddressResolver()
 {
-	freeaddrinfo(fHead);
+	if (fHead != NULL)
+		freeaddrinfo(fHead);
 }
 
 

src/add-ons/kernel/file_systems/nfs4/IdMap.cpp

@@ -166,8 +166,12 @@ IdMap::_Repair()
 	strlcat(path, "/nfs4_idmapper_server", sizeof(path));
 
 	const char* args[] = { path, NULL };
+#ifdef _KERNEL_MODE
 	thread_id thread = load_image_etc(1, args, NULL, B_NORMAL_PRIORITY,
 		B_SYSTEM_TEAM, 0);
+#else
+	thread_id thread = load_image(1, args, const_cast<const char**>(environ));
+#endif // _KERNEL_MODE
 	if (thread < B_OK) {
 		delete_port(fReplyPort);
 		delete_port(fRequestPort);

src/add-ons/kernel/file_systems/nfs4/NFS4Defs.h

@@ -14,6 +14,10 @@
 
 #include <SupportDefs.h>
 
+#ifdef USER
+extern "C" void dprintf(const char *format,...);
+#endif
+
 
 enum Procedure {
 	ProcNull		= 0,

src/add-ons/kernel/file_systems/nfs4/kernel_interface.cpp

@@ -7,8 +7,6 @@
  */
 
 
-#include <stdio.h>
-
 #include <AutoDeleter.h>
 #include <fs_cache.h>
 #include <fs_interface.h>

src/add-ons/kernel/file_systems/userlandfs/server/haiku/Jamfile

@@ -26,9 +26,12 @@ SharedLibrary libuserlandfs_haiku_kernel.so
 	# kernelland_emu
 	condition_variable.cpp
 	debug.cpp
+	heap.cpp
+	KernelReferenceable.cpp
 	lock.cpp
 	low_resource_manager.cpp
 	misc.cpp
+	Random.cpp
 	slab.cpp
 	vm.cpp
 

src/tests/add-ons/kernel/file_systems/userlandfs/Jamfile

@@ -3,6 +3,7 @@ SubDir HAIKU_TOP src tests add-ons kernel file_systems userlandfs ;
 SubInclude HAIKU_TOP src tests add-ons kernel file_systems userlandfs bfs ;
 SubInclude HAIKU_TOP src tests add-ons kernel file_systems userlandfs fat ;
 SubInclude HAIKU_TOP src tests add-ons kernel file_systems userlandfs cdda ;
+SubInclude HAIKU_TOP src tests add-ons kernel file_systems userlandfs nfs4 ;
 SubInclude HAIKU_TOP src tests add-ons kernel file_systems userlandfs ntfs ;
 SubInclude HAIKU_TOP src tests add-ons kernel file_systems userlandfs ramfs ;
 SubInclude HAIKU_TOP src tests add-ons kernel file_systems userlandfs reiserfs ;

src/tests/add-ons/kernel/file_systems/userlandfs/nfs4/Jamfile

@@ -0,0 +1,62 @@
+SubDir HAIKU_TOP src tests add-ons kernel file_systems userlandfs nfs4 ;
+
+local nfs4Top = [ FDirName $(HAIKU_TOP) src add-ons kernel file_systems nfs4 ] ;
+
+SEARCH_SOURCE += $(nfs4Top) ;
+
+# set some additional defines
+{
+	local defines =
+		USER=1
+	;
+
+	defines = [ FDefines $(defines) ] ;
+	SubDirC++Flags $(defines) -fno-rtti ;
+}
+
+UsePrivateKernelHeaders ;
+UsePrivateHeaders shared ;
+
+Addon <userland>nfs4
+	:
+	Cookie.cpp
+	Connection.cpp
+	Delegation.cpp
+	DirectoryCache.cpp
+	FileInfo.cpp
+	FileSystem.cpp
+	IdMap.cpp
+	Inode.cpp
+	InodeIdMap.cpp
+	InodeDir.cpp
+	InodeRegular.cpp
+	kernel_interface.cpp
+	MetadataCache.cpp
+	NFS4Inode.cpp
+	NFS4Object.cpp
+	NFS4Server.cpp
+	OpenState.cpp
+	ReplyBuilder.cpp
+	ReplyInterpreter.cpp
+	Request.cpp
+	RequestBuilder.cpp
+	RequestInterpreter.cpp
+	RootInode.cpp
+	RPCAuth.cpp
+	RPCCall.cpp
+	RPCCallback.cpp
+	RPCCallbackReply.cpp
+	RPCCallbackRequest.cpp
+	RPCCallbackServer.cpp
+	RPCReply.cpp
+	RPCServer.cpp
+	VnodeToInode.cpp
+	WorkQueue.cpp
+	XDR.cpp
+	:
+	libnetwork.so
+	libuserlandfs_haiku_kernel.so
+	[ TargetLibsupc++ ]
+;
+
+SubInclude HAIKU_TOP src add-ons kernel file_systems nfs4 idmapper ;

src/tests/add-ons/kernel/kernelland_emu/Jamfile

@@ -9,6 +9,8 @@ SharedLibrary libkernelland_emu.so :
 	condition_variable.cpp
 	debug.cpp
 	device_manager.cpp
+	heap.cpp
+	KernelReferenceable.cpp
 	KPath.cpp
 	lock.cpp
 	low_resource_manager.cpp
@@ -16,6 +18,7 @@ SharedLibrary libkernelland_emu.so :
 	misc.cpp
 	module.cpp
 	node_monitor.cpp
+	Random.cpp
 	slab.cpp
 	smp.cpp
 	team.cpp

src/tests/add-ons/kernel/kernelland_emu/KernelReferenceable.cpp

@@ -0,0 +1,14 @@
+/*
+ * Copyright 2025, Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include <util/KernelReferenceable.h>
+
+
+void
+KernelReferenceable::LastReferenceReleased()
+{
+	delete this;
+}

src/tests/add-ons/kernel/kernelland_emu/Random.cpp

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2025, Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include <util/Random.h>
+
+#include <errno.h>
+
+#include <Debug.h>
+
+
+unsigned int
+random_value()
+{
+	unsigned int value;
+	int status = getentropy(&value, sizeof(value));
+	if (status != 0)
+		SERIAL_PRINT(("kernelland_emu random_value() error: %s\n", strerror(errno)));
+
+	return value;
+}

src/tests/add-ons/kernel/kernelland_emu/heap.cpp

@@ -0,0 +1,12 @@
+/*
+ * Copyright 2025, Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include <heap.h>
+
+
+DeferredDeletable::~DeferredDeletable()
+{
+}