| /** @addtogroup MCD_MCDIMPL_DAEMON_KERNEL |
| * @{ |
| * @file |
| * |
| * Kernel Module Interface. |
| * |
| * |
| * Copyright (c) 2013 TRUSTONIC LIMITED |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * 3. Neither the name of the TRUSTONIC LIMITED nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| #include <cstdlib> |
| |
| #include <fcntl.h> |
| #include <sys/mman.h> |
| #include <errno.h> |
| |
| #include "CKMod.h" |
| |
| #include "log.h" |
| |
| #define INVALID_FILE_DESCRIPTOR ((int)(-1)) |
| |
| //------------------------------------------------------------------------------ |
| CKMod::CKMod(void) |
| { |
| fdKMod = INVALID_FILE_DESCRIPTOR; |
| } |
| |
| |
| //------------------------------------------------------------------------------ |
| CKMod::~CKMod(void) |
| { |
| close(); |
| } |
| |
| |
| //------------------------------------------------------------------------------ |
| bool CKMod::isOpen(void) |
| { |
| return (INVALID_FILE_DESCRIPTOR == fdKMod) ? false : true; |
| } |
| |
| |
| //------------------------------------------------------------------------------ |
| mcResult_t CKMod::open(const char *deviceName) |
| { |
| if (isOpen()) { |
| LOG_W("already open"); |
| return MC_DRV_ERR_DEVICE_ALREADY_OPEN; |
| } |
| |
| LOG_I(" Opening kernel module at %s.", deviceName); |
| |
| // open return -1 on error, "errno" is set with details |
| int openRet = ::open(deviceName, O_RDWR); |
| if (openRet == -1) { |
| LOG_ERRNO("open"); |
| return MAKE_MC_DRV_KMOD_WITH_ERRNO(errno); |
| } |
| |
| fdKMod = openRet; |
| return MC_DRV_OK; |
| } |
| |
| |
| //------------------------------------------------------------------------------ |
| void CKMod::close( |
| void |
| ) |
| { |
| if (isOpen()) { |
| if (::close(fdKMod) != 0) { |
| LOG_ERRNO("close"); |
| } else { |
| fdKMod = INVALID_FILE_DESCRIPTOR; |
| } |
| } else { |
| LOG_W(" Kernel module device not open"); |
| } |
| } |
| |
| /** @} */ |