fs/ncpfs/ncp_fs_sb.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *  ncp_fs_sb.h
   4  *
   5  *  Copyright (C) 1995, 1996 by Volker Lendecke
   6  *
   7  */
   8
   9 #ifndef _NCP_FS_SB
  10 #define _NCP_FS_SB
  11
  12 #include <linux/types.h>
  13 #include <linux/ncp_mount.h>
  14 #include <linux/net.h>
  15 #include <linux/mutex.h>
  16 #include <linux/backing-dev.h>
  17 #include <linux/workqueue.h>
  18
  19 #define NCP_DEFAULT_OPTIONS 0           /* 2 for packet signatures */
  20
  21 struct sock;
  22
  23 struct ncp_mount_data_kernel {
  24         unsigned long    flags;         /* NCP_MOUNT_* flags */
  25         unsigned int     int_flags;     /* internal flags */
  26 #define NCP_IMOUNT_LOGGEDIN_POSSIBLE    0x0001
  27         kuid_t           mounted_uid;   /* Who may umount() this filesystem? */
  28         struct pid      *wdog_pid;      /* Who cares for our watchdog packets? */
  29         unsigned int     ncp_fd;        /* The socket to the ncp port */
  30         unsigned int     time_out;      /* How long should I wait after
  31                                            sending a NCP request? */
  32         unsigned int     retry_count;   /* And how often should I retry? */
  33         unsigned char    mounted_vol[NCP_VOLNAME_LEN + 1];
  34         kuid_t           uid;
  35         kgid_t           gid;
  36         umode_t          file_mode;
  37         umode_t          dir_mode;
  38         int              info_fd;
  39 };
  40
  41 struct ncp_server {
  42         struct rcu_head rcu;
  43         struct ncp_mount_data_kernel m; /* Nearly all of the mount data is of
  44                                            interest for us later, so we store
  45                                            it completely. */
  46
  47         __u8 name_space[NCP_NUMBER_OF_VOLUMES + 2];
  48
  49         struct socket *ncp_sock;/* ncp socket */
  50         struct socket *info_sock;
  51
  52         u8 sequence;
  53         u8 task;
  54         u16 connection;         /* Remote connection number */
  55
  56         u8 completion;          /* Status message from server */
  57         u8 conn_status;         /* Bit 4 = 1 ==> Server going down, no
  58                                    requests allowed anymore.
  59                                    Bit 0 = 1 ==> Server is down. */
  60
  61         int buffer_size;        /* Negotiated bufsize */
  62
  63         int reply_size;         /* Size of last reply */
  64
  65         int packet_size;
  66         unsigned char *packet;  /* Here we prepare requests and
  67                                    receive replies */
  68         unsigned char *txbuf;   /* Storage for current request */
  69         unsigned char *rxbuf;   /* Storage for reply to current request */
  70
  71         int lock;               /* To prevent mismatch in protocols. */
  72         struct mutex mutex;
  73
  74         int current_size;       /* for packet preparation */
  75         int has_subfunction;
  76         int ncp_reply_size;
  77
  78         int root_setuped;
  79         struct mutex root_setup_lock;
  80
  81         /* info for packet signing */
  82         int sign_wanted;        /* 1=Server needs signed packets */
  83         int sign_active;        /* 0=don't do signing, 1=do */
  84         char sign_root[8];      /* generated from password and encr. key */
  85         char sign_last[16];
  86
  87         /* Authentication info: NDS or BINDERY, username */
  88         struct {
  89                 int     auth_type;
  90                 size_t  object_name_len;
  91                 void*   object_name;
  92                 int     object_type;
  93         } auth;
  94         /* Password info */
  95         struct {
  96                 size_t  len;
  97                 void*   data;
  98         } priv;
  99         struct rw_semaphore auth_rwsem;
 100
 101         /* nls info: codepage for volume and charset for I/O */
 102         struct nls_table *nls_vol;
 103         struct nls_table *nls_io;
 104
 105         /* maximum age in jiffies */
 106         atomic_t dentry_ttl;
 107
 108         /* miscellaneous */
 109         unsigned int flags;
 110
 111         spinlock_t requests_lock;       /* Lock accesses to tx.requests, tx.creq and rcv.creq when STREAM mode */
 112
 113         void (*data_ready)(struct sock* sk);
 114         void (*error_report)(struct sock* sk);
 115         void (*write_space)(struct sock* sk);   /* STREAM mode only */
 116         struct {
 117                 struct work_struct tq;          /* STREAM/DGRAM: data/error ready */
 118                 struct ncp_request_reply* creq; /* STREAM/DGRAM: awaiting reply from this request */
 119                 struct mutex creq_mutex;        /* DGRAM only: lock accesses to rcv.creq */
 120
 121                 unsigned int state;             /* STREAM only: receiver state */
 122                 struct {
 123                         __u32 magic __packed;
 124                         __u32 len __packed;
 125                         __u16 type __packed;
 126                         __u16 p1 __packed;
 127                         __u16 p2 __packed;
 128                         __u16 p3 __packed;
 129                         __u16 type2 __packed;
 130                 } buf;                          /* STREAM only: temporary buffer */
 131                 unsigned char* ptr;             /* STREAM only: pointer to data */
 132                 size_t len;                     /* STREAM only: length of data to receive */
 133         } rcv;
 134         struct {
 135                 struct list_head requests;      /* STREAM only: queued requests */
 136                 struct work_struct tq;          /* STREAM only: transmitter ready */
 137                 struct ncp_request_reply* creq; /* STREAM only: currently transmitted entry */
 138         } tx;
 139         struct timer_list timeout_tm;           /* DGRAM only: timeout timer */
 140         struct work_struct timeout_tq;          /* DGRAM only: associated queue, we run timers from process context */
 141         int timeout_last;                       /* DGRAM only: current timeout length */
 142         int timeout_retries;                    /* DGRAM only: retries left */
 143         struct {
 144                 size_t len;
 145                 __u8 data[128];
 146         } unexpected_packet;
 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