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

   * Copyright (C) 2004-2008 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 __LOPS_DOT_H__
  #define __LOPS_DOT_H__

  #include <linux/list.h>
  #include "incore.h"

  #define BUF_OFFSET \
  	((sizeof(struct gfs2_log_descriptor) + sizeof(__be64) - 1) & \
  	 ~(sizeof(__be64) - 1))
  #define DATABUF_OFFSET \
  	((sizeof(struct gfs2_log_descriptor) + (2 * sizeof(__be64) - 1)) & \
  	 ~(2 * sizeof(__be64) - 1))

  extern const struct gfs2_log_operations gfs2_glock_lops;
  extern const struct gfs2_log_operations gfs2_buf_lops;
  extern const struct gfs2_log_operations gfs2_revoke_lops;
  extern const struct gfs2_log_operations gfs2_rg_lops;
  extern const struct gfs2_log_operations gfs2_databuf_lops;

  extern const struct gfs2_log_operations *gfs2_log_ops[];

  static inline unsigned int buf_limit(struct gfs2_sbd *sdp)
  {
  	unsigned int limit;
  
  	limit = (sdp->sd_sb.sb_bsize - BUF_OFFSET) / sizeof(__be64);
  	return limit;
  }
  
  static inline unsigned int databuf_limit(struct gfs2_sbd *sdp)
  {
  	unsigned int limit;
  
  	limit = (sdp->sd_sb.sb_bsize - DATABUF_OFFSET) / (2 * sizeof(__be64));
  	return limit;
  }

  static inline void lops_init_le(struct gfs2_log_element *le,

  				const struct gfs2_log_operations *lops)

  {
  	INIT_LIST_HEAD(&le->le_list);
  	le->le_ops = lops;
  }
  
  static inline void lops_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
  {
  	if (le->le_ops->lo_add)
  		le->le_ops->lo_add(sdp, le);
  }

  static inline void lops_before_commit(struct gfs2_sbd *sdp)
  {
  	int x;
  	for (x = 0; gfs2_log_ops[x]; x++)
  		if (gfs2_log_ops[x]->lo_before_commit)
  			gfs2_log_ops[x]->lo_before_commit(sdp);
  }
  
  static inline void lops_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
  {
  	int x;
  	for (x = 0; gfs2_log_ops[x]; x++)
  		if (gfs2_log_ops[x]->lo_after_commit)
  			gfs2_log_ops[x]->lo_after_commit(sdp, ai);
  }
  
  static inline void lops_before_scan(struct gfs2_jdesc *jd,

  				    struct gfs2_log_header_host *head,

  				    unsigned int pass)
  {
  	int x;
  	for (x = 0; gfs2_log_ops[x]; x++)
  		if (gfs2_log_ops[x]->lo_before_scan)
  			gfs2_log_ops[x]->lo_before_scan(jd, head, pass);
  }
  
  static inline int lops_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
  				     struct gfs2_log_descriptor *ld,
  				     __be64 *ptr,
  				     unsigned int pass)
  {
  	int x, error;
  	for (x = 0; gfs2_log_ops[x]; x++)
  		if (gfs2_log_ops[x]->lo_scan_elements) {
  			error = gfs2_log_ops[x]->lo_scan_elements(jd, start,
  								  ld, ptr, pass);
  			if (error)
  				return error;
  		}
  
  	return 0;
  }
  
  static inline void lops_after_scan(struct gfs2_jdesc *jd, int error,
  				   unsigned int pass)
  {
  	int x;
  	for (x = 0; gfs2_log_ops[x]; x++)
  		if (gfs2_log_ops[x]->lo_before_scan)
  			gfs2_log_ops[x]->lo_after_scan(jd, error, pass);
  }
  
  #endif /* __LOPS_DOT_H__ */