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ncp_fs_sb.h
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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  uid_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  uid_t uid;
34  gid_t gid;
35  umode_t file_mode;
36  umode_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 
166 static inline int ncp_conn_valid(struct ncp_server *server)
167 {
168  return ((server->conn_status & 0x11) == 0);
169 }
170 
171 static inline void ncp_invalidate_conn(struct ncp_server *server)
172 {
173  server->conn_status |= 0x01;
174 }
175 
176 #endif
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