/*
   * 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 __EATTR_DOT_H__
  #define __EATTR_DOT_H__

  struct gfs2_inode;
  struct iattr;

  #define GFS2_EA_REC_LEN(ea) be32_to_cpu((ea)->ea_rec_len)
  #define GFS2_EA_DATA_LEN(ea) be32_to_cpu((ea)->ea_data_len)
  
  #define GFS2_EA_SIZE(ea) \
  ALIGN(sizeof(struct gfs2_ea_header) + (ea)->ea_name_len + \
        ((GFS2_EA_IS_STUFFED(ea)) ? GFS2_EA_DATA_LEN(ea) : \

                                    (sizeof(__be64) * (ea)->ea_num_ptrs)), 8)

  #define GFS2_EA_IS_STUFFED(ea) (!(ea)->ea_num_ptrs)
  #define GFS2_EA_IS_LAST(ea) ((ea)->ea_flags & GFS2_EAFLAG_LAST)
  
  #define GFS2_EAREQ_SIZE_STUFFED(er) \
  ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + (er)->er_data_len, 8)
  
  #define GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er) \
  ALIGN(sizeof(struct gfs2_ea_header) + (er)->er_name_len + \

        sizeof(__be64) * DIV_ROUND_UP((er)->er_data_len, (sdp)->sd_jbsize), 8)

  
  #define GFS2_EA2NAME(ea) ((char *)((struct gfs2_ea_header *)(ea) + 1))
  #define GFS2_EA2DATA(ea) (GFS2_EA2NAME(ea) + (ea)->ea_name_len)
  
  #define GFS2_EA2DATAPTRS(ea) \

  ((__be64 *)(GFS2_EA2NAME(ea) + ALIGN((ea)->ea_name_len, 8)))

  
  #define GFS2_EA2NEXT(ea) \
  ((struct gfs2_ea_header *)((char *)(ea) + GFS2_EA_REC_LEN(ea)))
  
  #define GFS2_EA_BH2FIRST(bh) \
  ((struct gfs2_ea_header *)((bh)->b_data + sizeof(struct gfs2_meta_header)))
  
  #define GFS2_ERF_MODE 0x80000000
  
  struct gfs2_ea_request {

  	const char *er_name;

  	char *er_data;
  	unsigned int er_name_len;
  	unsigned int er_data_len;
  	unsigned int er_type; /* GFS2_EATYPE_... */
  	int er_flags;
  	mode_t er_mode;
  };
  
  struct gfs2_ea_location {
  	struct buffer_head *el_bh;
  	struct gfs2_ea_header *el_ea;
  	struct gfs2_ea_header *el_prev;
  };

  int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
  int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
  int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er);
  
  int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er);
  int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er);
  int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er);
  int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er);
  
  int gfs2_ea_dealloc(struct gfs2_inode *ip);

  /* Exported to acl.c */
  
  int gfs2_ea_find(struct gfs2_inode *ip,
  		 struct gfs2_ea_request *er,
  		 struct gfs2_ea_location *el);
  int gfs2_ea_get_copy(struct gfs2_inode *ip,
  		     struct gfs2_ea_location *el,
  		     char *data);
  int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
  		      struct iattr *attr, char *data);

  static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
  {
  	switch (ea->ea_type) {
  	case GFS2_EATYPE_USR:

  		return 5 + ea->ea_name_len + 1;

  	case GFS2_EATYPE_SYS:

  		return 7 + ea->ea_name_len + 1;

  	case GFS2_EATYPE_SECURITY:

  		return 9 + ea->ea_name_len + 1;

  	default:

  		return 0;

  	}
  }

  #endif /* __EATTR_DOT_H__ */