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/** @file
* IPRT - Kernel module.
*/
/*
* Copyright (C) 2017-2025 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* 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, in version 3 of the
* License.
*
* 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 <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
#ifndef IPRT_INCLUDED_krnlmod_h
#define IPRT_INCLUDED_krnlmod_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/cdefs.h>
#include <iprt/types.h>
RT_C_DECLS_BEGIN
/** @defgroup grp_rt_kmod RTKrnlMod - Kernel module/driver userspace side API.
* @ingroup grp_rt
* @{
*/
/**
* Checks whether the given kernel module was loaded.
*
* @returns IPRT status code.
* @param pszName The driver name to check.
* @param pfLoaded Where to store the flag whether the module is loaded on success.
*/
RTDECL(int) RTKrnlModQueryLoaded(const char *pszName, bool *pfLoaded);
/**
* Returns the kernel module information handle for the given loaded kernel module.
*
* @returns IPRT status code.
* @retval VERR_NOT_FOUND if the kernel driver is not loaded.
* @param pszName The driver name.
* @param phKrnlModInfo Where to store the handle to the kernel module information record.
*/
RTDECL(int) RTKrnlModLoadedQueryInfo(const char *pszName, PRTKRNLMODINFO phKrnlModInfo);
/**
* Returns the number of kernel modules loaded on the host system.
*
* @returns Number of kernel modules loaded.
*/
RTDECL(uint32_t) RTKrnlModLoadedGetCount(void);
/**
* Returns all loaded kernel modules on the host.
*
* @returns IPRT status code.
* @retval VERR_BUFFER_OVERFLOW if there are not enough entries in the passed handle array.
* The required number of entries will be returned in pcEntries.
* @param pahKrnlModInfo Where to store the handles to the kernel module information records
* on success.
* @param cEntriesMax Maximum number of entries fitting in the given array.
* @param pcEntries Where to store the number of entries used/required.
*/
RTDECL(int) RTKrnlModLoadedQueryInfoAll(PRTKRNLMODINFO pahKrnlModInfo, uint32_t cEntriesMax,
uint32_t *pcEntries);
/**
* Retains the given kernel module information record handle.
*
* @returns New reference count.
* @param hKrnlModInfo The kernel module information record handle.
*/
RTDECL(uint32_t) RTKrnlModInfoRetain(RTKRNLMODINFO hKrnlModInfo);
/**
* Releases the given kernel module information record handle.
*
* @returns New reference count, on 0 the handle is destroyed.
* @param hKrnlModInfo The kernel module information record handle.
*/
RTDECL(uint32_t) RTKrnlModInfoRelease(RTKRNLMODINFO hKrnlModInfo);
/**
* Returns the number of references held onto the kernel module by other
* drivers or userspace clients.
*
* @returns Number of references held on the kernel module.
* @param hKrnlModInfo The kernel module information record handle.
*/
RTDECL(uint32_t) RTKrnlModInfoGetRefCnt(RTKRNLMODINFO hKrnlModInfo);
/**
* Returns the name of the kernel module.
*
* @returns Pointer to the kernel module name.
* @param hKrnlModInfo The kernel module information record handle.
*/
RTDECL(const char *) RTKrnlModInfoGetName(RTKRNLMODINFO hKrnlModInfo);
/**
* Returns the filepath of the kernel module.
*
* @returns Pointer to the kernel module path.
* @param hKrnlModInfo The kernel module information record handle.
*/
RTDECL(const char *) RTKrnlModInfoGetFilePath(RTKRNLMODINFO hKrnlModInfo);
/**
* Returns the size of the kernel module.
*
* @returns Size of the kernel module in bytes.
* @param hKrnlModInfo The kernel module information record handle.
*/
RTDECL(size_t) RTKrnlModInfoGetSize(RTKRNLMODINFO hKrnlModInfo);
/**
* Returns the load address of the kernel module.
*
* @returns Load address of the kernel module.
* @param hKrnlModInfo The kernel module information record handle.
*/
RTDECL(RTR0UINTPTR) RTKrnlModInfoGetLoadAddr(RTKRNLMODINFO hKrnlModInfo);
/**
* Query the kernel information record for a referencing kernel module of the
* given record.
*
* @returns IPRT status code.
* @param hKrnlModInfo The kernel module information record handle.
* @param idx Referencing kernel module index (< reference count
* as retrieved by RTKrnlModInfoGetRefCnt() ).
* @param phKrnlModInfoRef Where to store the handle to the referencing kernel module
* information record.
*/
RTDECL(int) RTKrnlModInfoQueryRefModInfo(RTKRNLMODINFO hKrnlModInfo, uint32_t idx,
PRTKRNLMODINFO phKrnlModInfoRef);
/**
* Tries to load a kernel module by the given name.
*
* @returns IPRT status code.
* @retval VERR_NOT_SUPPORTED if not supported by or implemented for the platform.
* @param pszName The name of the kernel module. This is highly platform
* dependent.
*
* @note On macOS for example the name is the bundle ID.
*/
RTDECL(int) RTKrnlModLoadByName(const char *pszName);
/**
* Tries to load a kernel module by the given file path.
*
* @returns IPRT status code.
* @retval VERR_NOT_SUPPORTED if not supported by or implemented for the platform.
* @param pszPath The path of the kernel module.
*/
RTDECL(int) RTKrnlModLoadByPath(const char *pszPath);
/**
* Tries to unload a kernel module by the given name.
*
* @returns IPRT status code.
* @param pszName The name of the kernel module. This is highly platform
* dependent and should be queried with RTKrnlModInfoGetName()
* when checking whether the module was actually loaded.
*
* @note On macOS for example the name is the bundle ID.
*/
RTDECL(int) RTKrnlModUnloadByName(const char *pszName);
/** @} */
RT_C_DECLS_END
#endif /* !IPRT_INCLUDED_krnlmod_h */
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