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         __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
 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