Line data    Source code

       1             : /*
       2             :    Unix SMB/CIFS implementation.
       3             :    Lease utility functions
       4             : 
       5             :    Copyright (C) Jeremy Allison 2017.
       6             :    Copyright (C) Stefan (metze) Metzmacher 2017.
       7             : 
       8             :    This program is free software; you can redistribute it and/or modify
       9             :    it under the terms of the GNU General Public License as published by
      10             :    the Free Software Foundation; either version 3 of the License, or
      11             :    (at your option) any later version.
      12             : 
      13             :    This program is distributed in the hope that it will be useful,
      14             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      15             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      16             :    GNU General Public License for more details.
      17             : 
      18             :    You should have received a copy of the GNU General Public License
      19             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.
      20             : */
      21             : 
      22             : #define DBGC_CLASS DBGC_LOCKING
      23             : #include "includes.h"
      24             : #include "../librpc/gen_ndr/open_files.h"
      25             : #include "locking/proto.h"
      26             : #include "smbd/globals.h"
      27             : #include "locking/leases_db.h"
      28             : 
      29        3119 : uint32_t map_oplock_to_lease_type(uint16_t op_type)
      30             : {
      31             :         uint32_t ret;
      32             : 
      33        3119 :         switch(op_type) {
      34         128 :         case BATCH_OPLOCK:
      35             :         case BATCH_OPLOCK|EXCLUSIVE_OPLOCK:
      36         128 :                 ret = SMB2_LEASE_READ|SMB2_LEASE_WRITE|SMB2_LEASE_HANDLE;
      37         128 :                 break;
      38           0 :         case EXCLUSIVE_OPLOCK:
      39           0 :                 ret = SMB2_LEASE_READ|SMB2_LEASE_WRITE;
      40           0 :                 break;
      41           0 :         case LEVEL_II_OPLOCK:
      42           0 :                 ret = SMB2_LEASE_READ;
      43           0 :                 break;
      44        2991 :         default:
      45        2991 :                 ret = SMB2_LEASE_NONE;
      46        2991 :                 break;
      47             :         }
      48        3119 :         return ret;
      49             : }
      50             : 
      51        1266 : uint32_t fsp_lease_type(struct files_struct *fsp)
      52             : {
      53             :         NTSTATUS status;
      54             : 
      55        1266 :         if (fsp->oplock_type != LEASE_OPLOCK) {
      56        1266 :                 uint32_t type = map_oplock_to_lease_type(fsp->oplock_type);
      57        1266 :                 return type;
      58             :         }
      59             : 
      60           0 :         status = leases_db_get_current_state(
      61             :                 fsp_client_guid(fsp),
      62           0 :                 &fsp->lease->lease.lease_key,
      63             :                 &fsp->leases_db_seqnum,
      64             :                 &fsp->lease_type);
      65           0 :         if (!NT_STATUS_IS_OK(status)) {
      66           0 :                 DBG_DEBUG("leases_db_get_current_state failed: %s\n",
      67             :                           nt_errstr(status));
      68           0 :                 fsp->lease_type = 0; /* no lease */
      69             :         }
      70             : 
      71           0 :         return fsp->lease_type;
      72             : }
      73             : 
      74           0 : const struct GUID *fsp_client_guid(const files_struct *fsp)
      75             : {
      76           0 :         return &fsp->conn->sconn->client->global->client_guid;
      77             : }