fs/ncpfs/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 #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         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
  40 struct 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
 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
 164 static inline int ncp_conn_valid(struct ncp_server *server)
 165 {
 166         return ((server->conn_status & 0x11) == 0);
 167 }
 168
 169 static inline void ncp_invalidate_conn(struct ncp_server *server)
 170 {
 171         server->conn_status |= 0x01;
 172 }
 173
 174 #endif