/*
   * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.

   * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.

   *
   * This copyrighted material is made available to anyone wishing to use,
   * modify, copy, or redistribute it subject to the terms and conditions

   * of the GNU General Public License version 2.

   */
  
  #ifndef __INODE_DOT_H__
  #define __INODE_DOT_H__

  #include <linux/fs.h>

  #include <linux/buffer_head.h>
  #include <linux/mm.h>

  #include "util.h"

  extern int gfs2_releasepage(struct page *page, gfp_t gfp_mask);
  extern int gfs2_internal_read(struct gfs2_inode *ip,
  			      struct file_ra_state *ra_state,
  			      char *buf, loff_t *pos, unsigned size);

  extern void gfs2_page_add_databufs(struct gfs2_inode *ip, struct page *page,
  				   unsigned int from, unsigned int to);

  extern void gfs2_set_aops(struct inode *inode);

  static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)

  {

  	return !ip->i_height;

  }

  static inline int gfs2_is_jdata(const struct gfs2_inode *ip)

  {

  	return ip->i_diskflags & GFS2_DIF_JDATA;

  }

  static inline int gfs2_is_writeback(const struct gfs2_inode *ip)
  {
  	const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
  	return (sdp->sd_args.ar_data == GFS2_DATA_WRITEBACK) && !gfs2_is_jdata(ip);
  }

  static inline int gfs2_is_ordered(const struct gfs2_inode *ip)
  {
  	const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
  	return (sdp->sd_args.ar_data == GFS2_DATA_ORDERED) && !gfs2_is_jdata(ip);
  }

  static inline int gfs2_is_dir(const struct gfs2_inode *ip)

  {

  	return S_ISDIR(ip->i_inode.i_mode);

  }

  static inline void gfs2_set_inode_blocks(struct inode *inode, u64 blocks)
  {
  	inode->i_blocks = blocks <<
  		(GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
  }
  
  static inline u64 gfs2_get_inode_blocks(const struct inode *inode)

  {

  	return inode->i_blocks >>

  		(GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
  }

  static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
  {
  	gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks > -change));
  	change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK);
  	inode->i_blocks += change;
  }

  static inline int gfs2_check_inum(const struct gfs2_inode *ip, u64 no_addr,
  				  u64 no_formal_ino)
  {
  	return ip->i_no_addr == no_addr && ip->i_no_formal_ino == no_formal_ino;
  }

  static inline void gfs2_inum_out(const struct gfs2_inode *ip,
  				 struct gfs2_dirent *dent)
  {
  	dent->de_inum.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
  	dent->de_inum.no_addr = cpu_to_be64(ip->i_no_addr);
  }

  static inline int gfs2_check_internal_file_size(struct inode *inode,
  						u64 minsize, u64 maxsize)
  {
  	u64 size = i_size_read(inode);
  	if (size < minsize || size > maxsize)
  		goto err;
  	if (size & ((1 << inode->i_blkbits) - 1))
  		goto err;
  	return 0;
  err:
  	gfs2_consist_inode(GFS2_I(inode));
  	return -EIO;
  }

  extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type, 

  				       u64 no_addr, u64 no_formal_ino,
  				       int non_block);

  extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
  					 u64 *no_formal_ino,
  					 unsigned int blktype);

  extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int nonblock);

  
  extern int gfs2_inode_refresh(struct gfs2_inode *ip);

  extern struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
  				  int is_root);

  extern int gfs2_permission(struct inode *inode, int mask);

  extern int gfs2_setattr_simple(struct inode *inode, struct iattr *attr);

  extern struct inode *gfs2_lookup_simple(struct inode *dip, const char *name);
  extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);

  extern const struct inode_operations gfs2_file_iops;
  extern const struct inode_operations gfs2_dir_iops;
  extern const struct inode_operations gfs2_symlink_iops;

  extern const struct file_operations gfs2_file_fops_nolock;
  extern const struct file_operations gfs2_dir_fops_nolock;

  
  extern void gfs2_set_inode_flags(struct inode *inode);

   
  #ifdef CONFIG_GFS2_FS_LOCKING_DLM

  extern const struct file_operations gfs2_file_fops;
  extern const struct file_operations gfs2_dir_fops;

  static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
  {
  	return sdp->sd_args.ar_localflocks;
  }
  #else /* Single node only */

  #define gfs2_file_fops gfs2_file_fops_nolock
  #define gfs2_dir_fops gfs2_dir_fops_nolock

  static inline int gfs2_localflocks(const struct gfs2_sbd *sdp)
  {
  	return 1;
  }
  #endif /* CONFIG_GFS2_FS_LOCKING_DLM */

  #endif /* __INODE_DOT_H__ */