/*

   Unix SMB/CIFS implementation.

   Lease utility functions

   Copyright (C) Jeremy Allison 2017.

   Copyright (C) Stefan (metze) Metzmacher 2017.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/

#define DBGC_CLASS DBGC_LOCKING

#include "includes.h"

#include "../librpc/gen_ndr/open_files.h"

#include "locking/proto.h"

#include "smbd/globals.h"

#include "locking/leases_db.h"

uint32_t map_oplock_to_lease_type(uint16_t op_type)

{

  uint32_t ret;

  switch(op_type) {

  case BATCH_OPLOCK:

  case BATCH_OPLOCK|EXCLUSIVE_OPLOCK:

    ret = SMB2_LEASE_READ|SMB2_LEASE_WRITE|SMB2_LEASE_HANDLE;

    break;

  case EXCLUSIVE_OPLOCK:

    ret = SMB2_LEASE_READ|SMB2_LEASE_WRITE;

    break;

  case LEVEL_II_OPLOCK:

    ret = SMB2_LEASE_READ;

    break;

  default:

    ret = SMB2_LEASE_NONE;

    break;

  }

  return ret;

}

uint32_t fsp_lease_type(struct files_struct *fsp)

{

  NTSTATUS status;

  if (fsp->oplock_type != LEASE_OPLOCK) {

    uint32_t type = map_oplock_to_lease_type(fsp->oplock_type);

    return type;

  }

  status = leases_db_get_current_state(

    fsp_client_guid(fsp),

    &fsp->lease->lease.lease_key,

    &fsp->leases_db_seqnum,

    &fsp->lease_type);

  if (!NT_STATUS_IS_OK(status)) {

    DBG_DEBUG("leases_db_get_current_state failed: %s\n",

        nt_errstr(status));

    fsp->lease_type = 0; /* no lease */

  }

  return fsp->lease_type;

}

const struct GUID *fsp_client_guid(const files_struct *fsp)

{

  return &fsp->conn->sconn->client->global->client_guid;

}