1/*
2 *  ncp_fs_sb.h
3 *
4 *  Copyright (C) 1995, 1996 by Volker Lendecke
5 *
6 */
7
8#ifndef _NCP_FS_SB
9#define _NCP_FS_SB
10
11#include <linux/types.h>
12#include <linux/ncp_mount.h>
13#include <linux/net.h>
14#include <linux/mutex.h>
15#include <linux/backing-dev.h>
16#include <linux/workqueue.h>
17
18#define NCP_DEFAULT_OPTIONS 0		/* 2 for packet signatures */
19
20struct sock;
21
22struct ncp_mount_data_kernel {
23	unsigned long    flags;		/* NCP_MOUNT_* flags */
24	unsigned int	 int_flags;	/* internal flags */
25#define NCP_IMOUNT_LOGGEDIN_POSSIBLE	0x0001
26	kuid_t		 mounted_uid;	/* Who may umount() this filesystem? */
27	struct pid      *wdog_pid;	/* Who cares for our watchdog packets? */
28	unsigned int     ncp_fd;	/* The socket to the ncp port */
29	unsigned int     time_out;	/* How long should I wait after
30					   sending a NCP request? */
31	unsigned int     retry_count;	/* And how often should I retry? */
32	unsigned char	 mounted_vol[NCP_VOLNAME_LEN + 1];
33	kuid_t		 uid;
34	kgid_t		 gid;
35	umode_t		 file_mode;
36	umode_t		 dir_mode;
37	int		 info_fd;
38};
39
40struct ncp_server {
41	struct rcu_head rcu;
42	struct ncp_mount_data_kernel m;	/* Nearly all of the mount data is of
43					   interest for us later, so we store
44					   it completely. */
45
46	__u8 name_space[NCP_NUMBER_OF_VOLUMES + 2];
47
48	struct socket *ncp_sock;/* ncp socket */
49	struct socket *info_sock;
50
51	u8 sequence;
52	u8 task;
53	u16 connection;		/* Remote connection number */
54
55	u8 completion;		/* Status message from server */
56	u8 conn_status;		/* Bit 4 = 1 ==> Server going down, no
57				   requests allowed anymore.
58				   Bit 0 = 1 ==> Server is down. */
59
60	int buffer_size;	/* Negotiated bufsize */
61
62	int reply_size;		/* Size of last reply */
63
64	int packet_size;
65	unsigned char *packet;	/* Here we prepare requests and
66				   receive replies */
67	unsigned char *txbuf;	/* Storage for current request */
68	unsigned char *rxbuf;	/* Storage for reply to current request */
69
70	int lock;		/* To prevent mismatch in protocols. */
71	struct mutex mutex;
72
73	int current_size;	/* for packet preparation */
74	int has_subfunction;
75	int ncp_reply_size;
76
77	int root_setuped;
78	struct mutex root_setup_lock;
79
80	/* info for packet signing */
81	int sign_wanted;	/* 1=Server needs signed packets */
82	int sign_active;	/* 0=don't do signing, 1=do */
83	char sign_root[8];	/* generated from password and encr. key */
84	char sign_last[16];
85
86	/* Authentication info: NDS or BINDERY, username */
87	struct {
88		int	auth_type;
89		size_t	object_name_len;
90		void*	object_name;
91		int	object_type;
92	} auth;
93	/* Password info */
94	struct {
95		size_t	len;
96		void*	data;
97	} priv;
98	struct rw_semaphore auth_rwsem;
99
100	/* nls info: codepage for volume and charset for I/O */
101	struct nls_table *nls_vol;
102	struct nls_table *nls_io;
103
104	/* maximum age in jiffies */
105	atomic_t dentry_ttl;
106
107	/* miscellaneous */
108	unsigned int flags;
109
110	spinlock_t requests_lock;	/* Lock accesses to tx.requests, tx.creq and rcv.creq when STREAM mode */
111
112	void (*data_ready)(struct sock* sk);
113	void (*error_report)(struct sock* sk);
114	void (*write_space)(struct sock* sk);	/* STREAM mode only */
115	struct {
116		struct work_struct tq;		/* STREAM/DGRAM: data/error ready */
117		struct ncp_request_reply* creq;	/* STREAM/DGRAM: awaiting reply from this request */
118		struct mutex creq_mutex;	/* DGRAM only: lock accesses to rcv.creq */
119
120		unsigned int state;		/* STREAM only: receiver state */
121		struct {
122			__u32 magic __packed;
123			__u32 len __packed;
124			__u16 type __packed;
125			__u16 p1 __packed;
126			__u16 p2 __packed;
127			__u16 p3 __packed;
128			__u16 type2 __packed;
129		} buf;				/* STREAM only: temporary buffer */
130		unsigned char* ptr;		/* STREAM only: pointer to data */
131		size_t len;			/* STREAM only: length of data to receive */
132	} rcv;
133	struct {
134		struct list_head requests;	/* STREAM only: queued requests */
135		struct work_struct tq;		/* STREAM only: transmitter ready */
136		struct ncp_request_reply* creq;	/* STREAM only: currently transmitted entry */
137	} tx;
138	struct timer_list timeout_tm;		/* DGRAM only: timeout timer */
139	struct work_struct timeout_tq;		/* DGRAM only: associated queue, we run timers from process context */
140	int timeout_last;			/* DGRAM only: current timeout length */
141	int timeout_retries;			/* DGRAM only: retries left */
142	struct {
143		size_t len;
144		__u8 data[128];
145	} unexpected_packet;
146	struct backing_dev_info bdi;
147};
148
149extern void ncp_tcp_rcv_proc(struct work_struct *work);
150extern void ncp_tcp_tx_proc(struct work_struct *work);
151extern void ncpdgram_rcv_proc(struct work_struct *work);
152extern void ncpdgram_timeout_proc(struct work_struct *work);
153extern void ncpdgram_timeout_call(unsigned long server);
154extern void ncp_tcp_data_ready(struct sock* sk);
155extern void ncp_tcp_write_space(struct sock* sk);
156extern void ncp_tcp_error_report(struct sock* sk);
157
158#define NCP_FLAG_UTF8	1
159
160#define NCP_CLR_FLAG(server, flag)	((server)->flags &= ~(flag))
161#define NCP_SET_FLAG(server, flag)	((server)->flags |= (flag))
162#define NCP_IS_FLAG(server, flag)	((server)->flags & (flag))
163
164static inline int ncp_conn_valid(struct ncp_server *server)
165{
166	return ((server->conn_status & 0x11) == 0);
167}
168
169static inline void ncp_invalidate_conn(struct ncp_server *server)
170{
171	server->conn_status |= 0x01;
172}
173
174#endif
175