include/linux/smb_fs_sb.h

   1 /*
   2  *  smb_fs_sb.h
   3  *
   4  *  Copyright (C) 1995 by Paal-Kr. Engstad and Volker Lendecke
   5  *  Copyright (C) 1997 by Volker Lendecke
   6  *
   7  */
   8
   9 #ifndef _SMB_FS_SB
  10 #define _SMB_FS_SB
  11
  12 #ifdef __KERNEL__
  13
  14 #include <linux/types.h>
  15 #include <linux/smb.h>
  16
  17 /*
  18  * Upper limit on the total number of active smb_request structs.
  19  */
  20 #define MAX_REQUEST_HARD       256
  21
  22 enum smb_receive_state {
  23         SMB_RECV_START,         /* No data read, looking for length + sig */
  24         SMB_RECV_HEADER,        /* Reading the header data */
  25         SMB_RECV_HCOMPLETE,     /* Done with the header */
  26         SMB_RECV_PARAM,         /* Reading parameter words */
  27         SMB_RECV_DATA,          /* Reading data bytes */
  28         SMB_RECV_END,           /* End of request */
  29         SMB_RECV_DROP,          /* Dropping this SMB */
  30         SMB_RECV_REQUEST,       /* Received a request and not a reply */
  31 };
  32
  33 /* structure access macros */
  34 #define server_from_inode(inode) SMB_SB((inode)->i_sb)
  35 #define server_from_dentry(dentry) SMB_SB((dentry)->d_sb)
  36 #define SB_of(server) ((server)->super_block)
  37
  38 struct smb_sb_info {
  39         /* List of all smbfs superblocks */
  40         struct list_head entry;
  41
  42         enum smb_conn_state state;
  43         struct file * sock_file;
  44         int conn_error;
  45         enum smb_receive_state rstate;
  46
  47         atomic_t nr_requests;
  48         struct list_head xmitq;
  49         struct list_head recvq;
  50         u16 mid;
  51
  52         struct smb_mount_data_kernel *mnt;
  53
  54         /* Connections are counted. Each time a new socket arrives,
  55          * generation is incremented.
  56          */
  57         unsigned int generation;
  58         pid_t conn_pid;
  59         struct smb_conn_opt opt;
  60         wait_queue_head_t conn_wq;
  61         int conn_complete;
  62         struct semaphore sem;
  63
  64         unsigned char      header[SMB_HEADER_LEN + 20*2 + 2];
  65         u32                header_len;
  66         u32                smb_len;
  67         u32                smb_read;
  68
  69         /* We use our own data_ready callback, but need the original one */
  70         void *data_ready;
  71
  72         /* nls pointers for codepage conversions */
  73         struct nls_table *remote_nls;
  74         struct nls_table *local_nls;
  75
  76         struct smb_ops *ops;
  77
  78         struct super_block *super_block;
  79 };
  80
  81 static inline int
  82 smb_lock_server_interruptible(struct smb_sb_info *server)
  83 {
  84         return down_interruptible(&(server->sem));
  85 }
  86
  87 static inline void
  88 smb_lock_server(struct smb_sb_info *server)
  89 {
  90         down(&(server->sem));
  91 }
  92
  93 static inline void
  94 smb_unlock_server(struct smb_sb_info *server)
  95 {
  96         up(&(server->sem));
  97 }
  98
  99 #endif /* __KERNEL__ */
 100
 101 #endif