nfs4: Add access() hook

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

@@ -132,6 +132,47 @@ Inode::LookUp(const char* name, ino_t* id)
 }
 
 
+status_t
+Inode::Access(int mode)
+{
+	RequestBuilder req(ProcCompound);
+	req.PutFH(fHandle);
+	req.Access();
+
+	RPC::Reply *rpl;
+	fFilesystem->Server()->SendCall(req.Request(), &rpl);
+	ReplyInterpreter reply(rpl);
+
+	status_t result;
+	result = reply.PutFH();
+	if (result != B_OK)
+		return result;
+
+	uint32 allowed;
+	result = reply.Access(NULL, &allowed);
+	if (result != B_OK)
+		return result;
+
+	int acc = 0;
+	if ((allowed & ACCESS4_READ) != 0)
+		acc |= R_OK;
+
+	if (fType == NF4DIR && (allowed & ACCESS4_LOOKUP) != 0)
+		acc |= X_OK | R_OK;
+
+	if (fType != NF4DIR && (allowed & ACCESS4_EXECUTE) != 0)
+		acc |= X_OK;
+
+	if ((allowed & ACCESS4_MODIFY) != 0)
+		acc |= W_OK;
+
+	if ((mode & acc) != mode)
+		return B_NOT_ALLOWED;
+
+	return B_OK;
+}
+
+
 status_t
 Inode::Stat(struct stat* st)
 {

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

@@ -34,6 +34,7 @@ public:
 	inline			const char*	Name() const;
 
 					status_t	LookUp(const char* name, ino_t* id);
+					status_t	Access(int mode);
 					status_t	Stat(struct stat* st);
 
 					status_t	Open(int mode, OpenFileCookie* cookie);

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

@@ -131,6 +131,14 @@ nfs4_put_vnode(fs_volume* volume, fs_vnode* vnode, bool reenter)
 }
 
 
+static status_t
+nfs4_access(fs_volume* volume, fs_vnode* vnode, int mode)
+{
+	Inode* inode = reinterpret_cast<Inode*>(vnode->private_node);
+	return inode->Access(mode);
+}
+
+
 static status_t
 nfs4_read_stat(fs_volume* volume, fs_vnode* vnode, struct stat* stat)
 {
@@ -312,7 +320,7 @@ fs_vnode_ops gNFSv4VnodeOps = {
 	NULL,	// unlink()
 	NULL,	// rename()
 
-	NULL,	// access()
+	nfs4_access,
 	nfs4_read_stat,
 	NULL,	// write_stat()
 	NULL,	// fs_preallocate()