/*
   *  smb_fs.h
   *
   *  Copyright (C) 1995 by Paal-Kr. Engstad and Volker Lendecke
   *  Copyright (C) 1997 by Volker Lendecke
   *
   */
  
  #ifndef _LINUX_SMB_FS_H
  #define _LINUX_SMB_FS_H
  
  #include <linux/smb.h>

  
  /*
   * ioctl commands
   */
  #define	SMB_IOC_GETMOUNTUID		_IOR('u', 1, __kernel_old_uid_t)
  #define SMB_IOC_NEWCONN                 _IOW('u', 2, struct smb_conn_opt)
  
  /* __kernel_uid_t can never change, so we have to use __kernel_uid32_t */
  #define	SMB_IOC_GETMOUNTUID32		_IOR('u', 3, __kernel_uid32_t)
  
  
  #ifdef __KERNEL__

  #include <linux/smb_fs_i.h>
  #include <linux/smb_fs_sb.h>

  
  #include <linux/fs.h>
  #include <linux/pagemap.h>
  #include <linux/vmalloc.h>
  #include <linux/smb_mount.h>

  #include <linux/jiffies.h>

  #include <asm/unaligned.h>
  
  static inline struct smb_sb_info *SMB_SB(struct super_block *sb)
  {
  	return sb->s_fs_info;
  }
  
  static inline struct smb_inode_info *SMB_I(struct inode *inode)
  {
  	return container_of(inode, struct smb_inode_info, vfs_inode);
  }
  
  /* macro names are short for word, double-word, long value (?) */
  #define WVAL(buf,pos) \

  	(le16_to_cpu(get_unaligned((__le16 *)((u8 *)(buf) + (pos)))))

  #define DVAL(buf,pos) \

  	(le32_to_cpu(get_unaligned((__le32 *)((u8 *)(buf) + (pos)))))

  #define LVAL(buf,pos) \

  	(le64_to_cpu(get_unaligned((__le64 *)((u8 *)(buf) + (pos)))))

  #define WSET(buf,pos,val) \

  	put_unaligned(cpu_to_le16((u16)(val)), (__le16 *)((u8 *)(buf) + (pos)))

  #define DSET(buf,pos,val) \

  	put_unaligned(cpu_to_le32((u32)(val)), (__le32 *)((u8 *)(buf) + (pos)))

  #define LSET(buf,pos,val) \

  	put_unaligned(cpu_to_le64((u64)(val)), (__le64 *)((u8 *)(buf) + (pos)))

  
  /* where to find the base of the SMB packet proper */
  #define smb_base(buf) ((u8 *)(((u8 *)(buf))+4))

  /*
   * Flags for the in-memory inode
   */
  #define SMB_F_LOCALWRITE	0x02	/* file modified locally */
  
  
  /* NT1 protocol capability bits */
  #define SMB_CAP_RAW_MODE         0x00000001
  #define SMB_CAP_MPX_MODE         0x00000002
  #define SMB_CAP_UNICODE          0x00000004
  #define SMB_CAP_LARGE_FILES      0x00000008
  #define SMB_CAP_NT_SMBS          0x00000010
  #define SMB_CAP_RPC_REMOTE_APIS  0x00000020
  #define SMB_CAP_STATUS32         0x00000040
  #define SMB_CAP_LEVEL_II_OPLOCKS 0x00000080
  #define SMB_CAP_LOCK_AND_READ    0x00000100
  #define SMB_CAP_NT_FIND          0x00000200
  #define SMB_CAP_DFS              0x00001000
  #define SMB_CAP_LARGE_READX      0x00004000
  #define SMB_CAP_LARGE_WRITEX     0x00008000
  #define SMB_CAP_UNIX             0x00800000	/* unofficial ... */
  
  
  /*
   * This is the time we allow an inode, dentry or dir cache to live. It is bad
   * for performance to have shorter ttl on an inode than on the cache. It can
   * cause refresh on each inode for a dir listing ... one-by-one
   */
  #define SMB_MAX_AGE(server) (((server)->mnt->ttl * HZ) / 1000)
  
  static inline void
  smb_age_dentry(struct smb_sb_info *server, struct dentry *dentry)
  {
  	dentry->d_time = jiffies - SMB_MAX_AGE(server);
  }
  
  struct smb_cache_head {
  	time_t		mtime;	/* unused */
  	unsigned long	time;	/* cache age */
  	unsigned long	end;	/* last valid fpos in cache */
  	int		eof;
  };
  
  #define SMB_DIRCACHE_SIZE	((int)(PAGE_CACHE_SIZE/sizeof(struct dentry *)))
  union smb_dir_cache {
  	struct smb_cache_head   head;
  	struct dentry           *dentry[SMB_DIRCACHE_SIZE];
  };
  
  #define SMB_FIRSTCACHE_SIZE	((int)((SMB_DIRCACHE_SIZE * \
  	sizeof(struct dentry *) - sizeof(struct smb_cache_head)) / \
  	sizeof(struct dentry *)))
  
  #define SMB_DIRCACHE_START      (SMB_DIRCACHE_SIZE - SMB_FIRSTCACHE_SIZE)
  
  struct smb_cache_control {
  	struct  smb_cache_head		head;
  	struct  page			*page;
  	union   smb_dir_cache		*cache;
  	unsigned long			fpos, ofs;
  	int				filled, valid, idx;
  };
  
  #define SMB_OPS_NUM_STATIC	5
  struct smb_ops {
  	int (*read)(struct inode *inode, loff_t offset, int count,
  		    char *data);
  	int (*write)(struct inode *inode, loff_t offset, int count, const
  		     char *data);
  	int (*readdir)(struct file *filp, void *dirent, filldir_t filldir,
  		       struct smb_cache_control *ctl);
  
  	int (*getattr)(struct smb_sb_info *server, struct dentry *dir,
  		       struct smb_fattr *fattr);
  	/* int (*setattr)(...); */      /* setattr is really icky! */
  
  	int (*truncate)(struct inode *inode, loff_t length);
  
  
  	/* --- --- --- end of "static" entries --- --- --- */
  
  	int (*convert)(unsigned char *output, int olen,
  		       const unsigned char *input, int ilen,
  		       struct nls_table *nls_from,
  		       struct nls_table *nls_to);
  };
  
  static inline int
  smb_is_open(struct inode *i)
  {
  	return (SMB_I(i)->open == server_from_inode(i)->generation);
  }
  
  extern void smb_install_null_ops(struct smb_ops *);
  #endif /* __KERNEL__ */
  
  #endif /* _LINUX_SMB_FS_H */