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/*
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;
}
static uint32_t lease_type_is_exclusive(uint32_t lease_type)
{
if ((lease_type & (SMB2_LEASE_READ | SMB2_LEASE_WRITE)) ==
(SMB2_LEASE_READ | SMB2_LEASE_WRITE)) {
return true;
}
return false;
}
bool fsp_lease_type_is_exclusive(struct files_struct *fsp)
{
uint32_t lease_type = fsp_lease_type(fsp);
return lease_type_is_exclusive(lease_type);
}
const struct GUID *fsp_client_guid(const files_struct *fsp)
{
return &fsp->conn->sconn->client->connections->smb2.client.guid;
}
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