/******************************************************************************
  *******************************************************************************
  **

  **  Copyright (C) 2005-2008 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 v.2.
  **
  *******************************************************************************
  ******************************************************************************/
  
  #include "dlm_internal.h"
  #include "rcom.h"
  #include "util.h"

  #define DLM_ERRNO_EDEADLK		35
  #define DLM_ERRNO_EBADR			53
  #define DLM_ERRNO_EBADSLT		57
  #define DLM_ERRNO_EPROTO		71
  #define DLM_ERRNO_EOPNOTSUPP		95
  #define DLM_ERRNO_ETIMEDOUT	       110
  #define DLM_ERRNO_EINPROGRESS	       115

  static void header_out(struct dlm_header *hd)
  {
  	hd->h_version		= cpu_to_le32(hd->h_version);
  	hd->h_lockspace		= cpu_to_le32(hd->h_lockspace);
  	hd->h_nodeid		= cpu_to_le32(hd->h_nodeid);
  	hd->h_length		= cpu_to_le16(hd->h_length);
  }
  
  static void header_in(struct dlm_header *hd)
  {
  	hd->h_version		= le32_to_cpu(hd->h_version);
  	hd->h_lockspace		= le32_to_cpu(hd->h_lockspace);
  	hd->h_nodeid		= le32_to_cpu(hd->h_nodeid);
  	hd->h_length		= le16_to_cpu(hd->h_length);
  }

  /* higher errno values are inconsistent across architectures, so select
     one set of values for on the wire */
  
  static int to_dlm_errno(int err)
  {
  	switch (err) {
  	case -EDEADLK:
  		return -DLM_ERRNO_EDEADLK;
  	case -EBADR:
  		return -DLM_ERRNO_EBADR;
  	case -EBADSLT:
  		return -DLM_ERRNO_EBADSLT;
  	case -EPROTO:
  		return -DLM_ERRNO_EPROTO;
  	case -EOPNOTSUPP:
  		return -DLM_ERRNO_EOPNOTSUPP;
  	case -ETIMEDOUT:
  		return -DLM_ERRNO_ETIMEDOUT;
  	case -EINPROGRESS:
  		return -DLM_ERRNO_EINPROGRESS;
  	}
  	return err;
  }
  
  static int from_dlm_errno(int err)
  {
  	switch (err) {
  	case -DLM_ERRNO_EDEADLK:
  		return -EDEADLK;
  	case -DLM_ERRNO_EBADR:
  		return -EBADR;
  	case -DLM_ERRNO_EBADSLT:
  		return -EBADSLT;
  	case -DLM_ERRNO_EPROTO:
  		return -EPROTO;
  	case -DLM_ERRNO_EOPNOTSUPP:
  		return -EOPNOTSUPP;
  	case -DLM_ERRNO_ETIMEDOUT:
  		return -ETIMEDOUT;
  	case -DLM_ERRNO_EINPROGRESS:
  		return -EINPROGRESS;
  	}
  	return err;
  }

  void dlm_message_out(struct dlm_message *ms)
  {

  	header_out(&ms->m_header);

  
  	ms->m_type		= cpu_to_le32(ms->m_type);
  	ms->m_nodeid		= cpu_to_le32(ms->m_nodeid);
  	ms->m_pid		= cpu_to_le32(ms->m_pid);
  	ms->m_lkid		= cpu_to_le32(ms->m_lkid);
  	ms->m_remid		= cpu_to_le32(ms->m_remid);
  	ms->m_parent_lkid	= cpu_to_le32(ms->m_parent_lkid);
  	ms->m_parent_remid	= cpu_to_le32(ms->m_parent_remid);
  	ms->m_exflags		= cpu_to_le32(ms->m_exflags);
  	ms->m_sbflags		= cpu_to_le32(ms->m_sbflags);
  	ms->m_flags		= cpu_to_le32(ms->m_flags);
  	ms->m_lvbseq		= cpu_to_le32(ms->m_lvbseq);
  	ms->m_hash		= cpu_to_le32(ms->m_hash);
  	ms->m_status		= cpu_to_le32(ms->m_status);
  	ms->m_grmode		= cpu_to_le32(ms->m_grmode);
  	ms->m_rqmode		= cpu_to_le32(ms->m_rqmode);
  	ms->m_bastmode		= cpu_to_le32(ms->m_bastmode);
  	ms->m_asts		= cpu_to_le32(ms->m_asts);

  	ms->m_result		= cpu_to_le32(to_dlm_errno(ms->m_result));

  }
  
  void dlm_message_in(struct dlm_message *ms)
  {

  	header_in(&ms->m_header);

  
  	ms->m_type		= le32_to_cpu(ms->m_type);
  	ms->m_nodeid		= le32_to_cpu(ms->m_nodeid);
  	ms->m_pid		= le32_to_cpu(ms->m_pid);
  	ms->m_lkid		= le32_to_cpu(ms->m_lkid);
  	ms->m_remid		= le32_to_cpu(ms->m_remid);
  	ms->m_parent_lkid	= le32_to_cpu(ms->m_parent_lkid);
  	ms->m_parent_remid	= le32_to_cpu(ms->m_parent_remid);
  	ms->m_exflags		= le32_to_cpu(ms->m_exflags);
  	ms->m_sbflags		= le32_to_cpu(ms->m_sbflags);
  	ms->m_flags		= le32_to_cpu(ms->m_flags);
  	ms->m_lvbseq		= le32_to_cpu(ms->m_lvbseq);
  	ms->m_hash		= le32_to_cpu(ms->m_hash);
  	ms->m_status		= le32_to_cpu(ms->m_status);
  	ms->m_grmode		= le32_to_cpu(ms->m_grmode);
  	ms->m_rqmode		= le32_to_cpu(ms->m_rqmode);
  	ms->m_bastmode		= le32_to_cpu(ms->m_bastmode);
  	ms->m_asts		= le32_to_cpu(ms->m_asts);

  	ms->m_result		= from_dlm_errno(le32_to_cpu(ms->m_result));

  }

  void dlm_rcom_out(struct dlm_rcom *rc)
  {

  	header_out(&rc->rc_header);

  
  	rc->rc_type		= cpu_to_le32(rc->rc_type);
  	rc->rc_result		= cpu_to_le32(rc->rc_result);
  	rc->rc_id		= cpu_to_le64(rc->rc_id);

  	rc->rc_seq		= cpu_to_le64(rc->rc_seq);
  	rc->rc_seq_reply	= cpu_to_le64(rc->rc_seq_reply);

  }
  
  void dlm_rcom_in(struct dlm_rcom *rc)
  {

  	header_in(&rc->rc_header);

  
  	rc->rc_type		= le32_to_cpu(rc->rc_type);
  	rc->rc_result		= le32_to_cpu(rc->rc_result);
  	rc->rc_id		= le64_to_cpu(rc->rc_id);

  	rc->rc_seq		= le64_to_cpu(rc->rc_seq);
  	rc->rc_seq_reply	= le64_to_cpu(rc->rc_seq_reply);

  }