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
20 struct sock;
21
22 struct 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 __kernel_uid32_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 __kernel_uid32_t uid;
34 __kernel_gid32_t gid;
35 __kernel_mode_t file_mode;
36 __kernel_mode_t dir_mode;
37 int info_fd;
38 };
39
40 struct ncp_server {
41
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 file *ncp_filp; /* File pointer to ncp socket */
49 struct socket *ncp_sock;/* ncp socket */
50 struct file *info_filp;
51 struct socket *info_sock;
52
53 u8 sequence;
54 u8 task;
55 u16 connection; /* Remote connection number */
56
57 u8 completion; /* Status message from server */
58 u8 conn_status; /* Bit 4 = 1 ==> Server going down, no
59 requests allowed anymore.
60 Bit 0 = 1 ==> Server is down. */
61
62 int buffer_size; /* Negotiated bufsize */
63
64 int reply_size; /* Size of last reply */
65
66 int packet_size;
67 unsigned char *packet; /* Here we prepare requests and
68 receive replies */
69 unsigned char *txbuf; /* Storage for current request */
70 unsigned char *rxbuf; /* Storage for reply to current request */
71
72 int lock; /* To prevent mismatch in protocols. */
73 struct mutex mutex;
74
75 int current_size; /* for packet preparation */
76 int has_subfunction;
77 int ncp_reply_size;
78
79 int root_setuped;
80 struct mutex root_setup_lock;
81
82 /* info for packet signing */
83 int sign_wanted; /* 1=Server needs signed packets */
84 int sign_active; /* 0=don't do signing, 1=do */
85 char sign_root[8]; /* generated from password and encr. key */
86 char sign_last[16];
87
88 /* Authentication info: NDS or BINDERY, username */
89 struct {
90 int auth_type;
91 size_t object_name_len;
92 void* object_name;
93 int object_type;
94 } auth;
95 /* Password info */
96 struct {
97 size_t len;
98 void* data;
99 } priv;
100 struct rw_semaphore auth_rwsem;
101
102 /* nls info: codepage for volume and charset for I/O */
103 struct nls_table *nls_vol;
104 struct nls_table *nls_io;
105
106 /* maximum age in jiffies */
107 atomic_t dentry_ttl;
108
109 /* miscellaneous */
110 unsigned int flags;
111
112 spinlock_t requests_lock; /* Lock accesses to tx.requests, tx.creq and rcv.creq when STREAM mode */
113
114 void (*data_ready)(struct sock* sk, int len);
115 void (*error_report)(struct sock* sk);
116 void (*write_space)(struct sock* sk); /* STREAM mode only */
117 struct {
118 struct work_struct tq; /* STREAM/DGRAM: data/error ready */
119 struct ncp_request_reply* creq; /* STREAM/DGRAM: awaiting reply from this request */
120 struct mutex creq_mutex; /* DGRAM only: lock accesses to rcv.creq */
121
122 unsigned int state; /* STREAM only: receiver state */
123 struct {
124 __u32 magic __packed;
125 __u32 len __packed;
126 __u16 type __packed;
127 __u16 p1 __packed;
128 __u16 p2 __packed;
129 __u16 p3 __packed;
130 __u16 type2 __packed;
131 } buf; /* STREAM only: temporary buffer */
132 unsigned char* ptr; /* STREAM only: pointer to data */
133 size_t len; /* STREAM only: length of data to receive */
134 } rcv;
135 struct {
136 struct list_head requests; /* STREAM only: queued requests */
137 struct work_struct tq; /* STREAM only: transmitter ready */
138 struct ncp_request_reply* creq; /* STREAM only: currently transmitted entry */
139 } tx;
140 struct timer_list timeout_tm; /* DGRAM only: timeout timer */
141 struct work_struct timeout_tq; /* DGRAM only: associated queue, we run timers from process context */
142 int timeout_last; /* DGRAM only: current timeout length */
143 int timeout_retries; /* DGRAM only: retries left */
144 struct {
145 size_t len;
146 __u8 data[128];
147 } unexpected_packet;
148 struct backing_dev_info bdi;
149 };
150
151 extern void ncp_tcp_rcv_proc(struct work_struct *work);
152 extern void ncp_tcp_tx_proc(struct work_struct *work);
153 extern void ncpdgram_rcv_proc(struct work_struct *work);
154 extern void ncpdgram_timeout_proc(struct work_struct *work);
155 extern void ncpdgram_timeout_call(unsigned long server);
156 extern void ncp_tcp_data_ready(struct sock* sk, int len);
157 extern void ncp_tcp_write_space(struct sock* sk);
158 extern void ncp_tcp_error_report(struct sock* sk);
159
160 #define NCP_FLAG_UTF8 1
161
162 #define NCP_CLR_FLAG(server, flag) ((server)->flags &= ~(flag))
163 #define NCP_SET_FLAG(server, flag) ((server)->flags |= (flag))
164 #define NCP_IS_FLAG(server, flag) ((server)->flags & (flag))
165
ncp_conn_valid(struct ncp_server * server)166 static inline int ncp_conn_valid(struct ncp_server *server)
167 {
168 return ((server->conn_status & 0x11) == 0);
169 }
170
ncp_invalidate_conn(struct ncp_server * server)171 static inline void ncp_invalidate_conn(struct ncp_server *server)
172 {
173 server->conn_status |= 0x01;
174 }
175
176 #endif
177