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