cifsd: add server-side procedures for SMB3

This adds smb3 engine, NTLM/NTLMv2/Kerberos authentication, oplock/lease
cache mechanism for cifsd.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Acked-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

1 files changed, 105 insertions, 0 deletions

diff --git a/fs/cifsd/mgmt/user_session.h b/fs/cifsd/mgmt/user_session.h
new file mode 100644
index 000000000000..0a6eb21647ab
--- /dev/null
+++ b/fs/cifsd/mgmt/user_session.h
@@ -0,0 +1,105 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *   Copyright (C) 2018 Samsung Electronics Co., Ltd.
+ */
+
+#ifndef __USER_SESSION_MANAGEMENT_H__
+#define __USER_SESSION_MANAGEMENT_H__
+
+#include <linux/hashtable.h>
+
+#include "../smb_common.h"
+#include "../ntlmssp.h"
+
+#define CIFDS_SESSION_FLAG_SMB2		(1 << 1)
+
+#define PREAUTH_HASHVALUE_SIZE		64
+
+struct ksmbd_ida;
+struct ksmbd_file_table;
+
+struct channel {
+	__u8			smb3signingkey[SMB3_SIGN_KEY_SIZE];
+	struct ksmbd_conn	*conn;
+	struct list_head	chann_list;
+};
+
+struct preauth_session {
+	__u8			Preauth_HashValue[PREAUTH_HASHVALUE_SIZE];
+	uint64_t		sess_id;
+	struct list_head	list_entry;
+};
+
+struct ksmbd_session {
+	uint64_t			id;
+
+	struct ksmbd_user		*user;
+	struct ksmbd_conn		*conn;
+	unsigned int			sequence_number;
+	unsigned int			flags;
+
+	bool				sign;
+	bool				enc;
+	bool				is_anonymous;
+
+	int				state;
+	__u8				*Preauth_HashValue;
+
+	struct ntlmssp_auth		ntlmssp;
+	char				sess_key[CIFS_KEY_SIZE];
+
+	struct hlist_node		hlist;
+	struct list_head		ksmbd_chann_list;
+	struct list_head		tree_conn_list;
+	struct ksmbd_ida		*tree_conn_ida;
+	struct list_head		rpc_handle_list;
+
+	__u8				smb3encryptionkey[SMB3_SIGN_KEY_SIZE];
+	__u8				smb3decryptionkey[SMB3_SIGN_KEY_SIZE];
+	__u8				smb3signingkey[SMB3_SIGN_KEY_SIZE];
+
+	struct list_head		sessions_entry;
+	struct ksmbd_file_table		file_table;
+	atomic_t			refcnt;
+};
+
+static inline int test_session_flag(struct ksmbd_session *sess, int bit)
+{
+	return sess->flags & bit;
+}
+
+static inline void set_session_flag(struct ksmbd_session *sess, int bit)
+{
+	sess->flags |= bit;
+}
+
+static inline void clear_session_flag(struct ksmbd_session *sess, int bit)
+{
+	sess->flags &= ~bit;
+}
+
+struct ksmbd_session *ksmbd_smb2_session_create(void);
+
+void ksmbd_session_destroy(struct ksmbd_session *sess);
+
+bool ksmbd_session_id_match(struct ksmbd_session *sess, unsigned long long id);
+struct ksmbd_session *ksmbd_session_lookup_slowpath(unsigned long long id);
+struct ksmbd_session *ksmbd_session_lookup(struct ksmbd_conn *conn,
+					   unsigned long long id);
+void ksmbd_session_register(struct ksmbd_conn *conn,
+			    struct ksmbd_session *sess);
+void ksmbd_sessions_deregister(struct ksmbd_conn *conn);
+
+int ksmbd_acquire_tree_conn_id(struct ksmbd_session *sess);
+void ksmbd_release_tree_conn_id(struct ksmbd_session *sess, int id);
+
+int ksmbd_session_rpc_open(struct ksmbd_session *sess, char *rpc_name);
+void ksmbd_session_rpc_close(struct ksmbd_session *sess, int id);
+int ksmbd_session_rpc_method(struct ksmbd_session *sess, int id);
+int get_session(struct ksmbd_session *sess);
+void put_session(struct ksmbd_session *sess);
+
+int ksmbd_init_session_table(void);
+void ksmbd_free_session_table(void);
+
+#endif /* __USER_SESSION_MANAGEMENT_H__ */