include/linux/ncp_fs_sb.h

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