1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * ncp_fs_sb.h
4 *
5 * Copyright (C) 1995, 1996 by Volker Lendecke
6 *
7 */
8
9 #ifndef _NCP_FS_SB
10 #define _NCP_FS_SB
11
12 #include <linux/types.h>
13 #include <linux/ncp_mount.h>
14 #include <linux/net.h>
15 #include <linux/mutex.h>
16 #include <linux/backing-dev.h>
17 #include <linux/workqueue.h>
18
19 #define NCP_DEFAULT_OPTIONS 0 /* 2 for packet signatures */
20
21 struct sock;
22
23 struct ncp_mount_data_kernel {
24 unsigned long flags; /* NCP_MOUNT_* flags */
25 unsigned int int_flags; /* internal flags */
26 #define NCP_IMOUNT_LOGGEDIN_POSSIBLE 0x0001
27 kuid_t mounted_uid; /* Who may umount() this filesystem? */
28 struct pid *wdog_pid; /* Who cares for our watchdog packets? */
29 unsigned int ncp_fd; /* The socket to the ncp port */
30 unsigned int time_out; /* How long should I wait after
31 sending a NCP request? */
32 unsigned int retry_count; /* And how often should I retry? */
33 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
34 kuid_t uid;
35 kgid_t gid;
36 umode_t file_mode;
37 umode_t dir_mode;
38 int info_fd;
39 };
40
41 struct ncp_server {
42 struct rcu_head rcu;
43 struct ncp_mount_data_kernel m; /* Nearly all of the mount data is of
44 interest for us later, so we store
45 it completely. */
46
47 __u8 name_space[NCP_NUMBER_OF_VOLUMES + 2];
48
49 struct socket *ncp_sock;/* ncp socket */
50 struct socket *info_sock;
51
52 u8 sequence;
53 u8 task;
54 u16 connection; /* Remote connection number */
55
56 u8 completion; /* Status message from server */
57 u8 conn_status; /* Bit 4 = 1 ==> Server going down, no
58 requests allowed anymore.
59 Bit 0 = 1 ==> Server is down. */
60
61 int buffer_size; /* Negotiated bufsize */
62
63 int reply_size; /* Size of last reply */
64
65 int packet_size;
66 unsigned char *packet; /* Here we prepare requests and
67 receive replies */
68 unsigned char *txbuf; /* Storage for current request */
69 unsigned char *rxbuf; /* Storage for reply to current request */
70
71 int lock; /* To prevent mismatch in protocols. */
72 struct mutex mutex;
73
74 int current_size; /* for packet preparation */
75 int has_subfunction;
76 int ncp_reply_size;
77
78 int root_setuped;
79 struct mutex root_setup_lock;
80
81 /* info for packet signing */
82 int sign_wanted; /* 1=Server needs signed packets */
83 int sign_active; /* 0=don't do signing, 1=do */
84 char sign_root[8]; /* generated from password and encr. key */
85 char sign_last[16];
86
87 /* Authentication info: NDS or BINDERY, username */
88 struct {
89 int auth_type;
90 size_t object_name_len;
91 void* object_name;
92 int object_type;
93 } auth;
94 /* Password info */
95 struct {
96 size_t len;
97 void* data;
98 } priv;
99 struct rw_semaphore auth_rwsem;
100
101 /* nls info: codepage for volume and charset for I/O */
102 struct nls_table *nls_vol;
103 struct nls_table *nls_io;
104
105 /* maximum age in jiffies */
106 atomic_t dentry_ttl;
107
108 /* miscellaneous */
109 unsigned int flags;
110
111 spinlock_t requests_lock; /* Lock accesses to tx.requests, tx.creq and rcv.creq when STREAM mode */
112
113 void (*data_ready)(struct sock* sk);
114 void (*error_report)(struct sock* sk);
115 void (*write_space)(struct sock* sk); /* STREAM mode only */
116 struct {
117 struct work_struct tq; /* STREAM/DGRAM: data/error ready */
118 struct ncp_request_reply* creq; /* STREAM/DGRAM: awaiting reply from this request */
119 struct mutex creq_mutex; /* DGRAM only: lock accesses to rcv.creq */
120
121 unsigned int state; /* STREAM only: receiver state */
122 struct {
123 __u32 magic __packed;
124 __u32 len __packed;
125 __u16 type __packed;
126 __u16 p1 __packed;
127 __u16 p2 __packed;
128 __u16 p3 __packed;
129 __u16 type2 __packed;
130 } buf; /* STREAM only: temporary buffer */
131 unsigned char* ptr; /* STREAM only: pointer to data */
132 size_t len; /* STREAM only: length of data to receive */
133 } rcv;
134 struct {
135 struct list_head requests; /* STREAM only: queued requests */
136 struct work_struct tq; /* STREAM only: transmitter ready */
137 struct ncp_request_reply* creq; /* STREAM only: currently transmitted entry */
138 } tx;
139 struct timer_list timeout_tm; /* DGRAM only: timeout timer */
140 struct work_struct timeout_tq; /* DGRAM only: associated queue, we run timers from process context */
141 int timeout_last; /* DGRAM only: current timeout length */
142 int timeout_retries; /* DGRAM only: retries left */
143 struct {
144 size_t len;
145 __u8 data[128];
146 } unexpected_packet;
147 };
148
149 extern void ncp_tcp_rcv_proc(struct work_struct *work);
150 extern void ncp_tcp_tx_proc(struct work_struct *work);
151 extern void ncpdgram_rcv_proc(struct work_struct *work);
152 extern void ncpdgram_timeout_proc(struct work_struct *work);
153 extern void ncpdgram_timeout_call(unsigned long server);
154 extern void ncp_tcp_data_ready(struct sock* sk);
155 extern void ncp_tcp_write_space(struct sock* sk);
156 extern 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
ncp_conn_valid(struct ncp_server * server)164 static inline int ncp_conn_valid(struct ncp_server *server)
165 {
166 return ((server->conn_status & 0x11) == 0);
167 }
168
ncp_invalidate_conn(struct ncp_server * server)169 static inline void ncp_invalidate_conn(struct ncp_server *server)
170 {
171 server->conn_status |= 0x01;
172 }
173
174 #endif
175