119 lines
3.6 KiB
C
119 lines
3.6 KiB
C
/*
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* Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
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* Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "capability_type.h"
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#include "los_memory.h"
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#include "los_process_pri.h"
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#include "user_copy.h"
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#include "los_printf.h"
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#define CAPABILITY_INIT_STAT 0xffffffff
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#define CAPABILITY_GET_CAP_MASK(x) (1 << ((x) & 31))
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#define CAPABILITY_MAX 31
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#define VALID_CAPS(a, b) (((a) & (~(b))) != 0)
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BOOL IsCapPermit(UINT32 capIndex)
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{
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UINT32 capability = OsCurrProcessGet()->capability;
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if (capIndex > CAPABILITY_MAX || capIndex < 0) {
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PRINTK("%s,%d, get invalid capIndex %d\n", __FUNCTION__, __LINE__, capIndex);
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return FALSE;
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}
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return (capability & (CAPABILITY_GET_CAP_MASK(capIndex)));
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}
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VOID OsInitCapability(LosProcessCB *processCB)
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{
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processCB->capability = CAPABILITY_INIT_STAT;
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}
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VOID OsCopyCapability(LosProcessCB *from, LosProcessCB *to)
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{
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UINT32 intSave;
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SCHEDULER_LOCK(intSave);
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to->capability = from->capability;
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SCHEDULER_UNLOCK(intSave);
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}
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UINT32 SysCapSet(UINT32 caps)
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{
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UINT32 intSave;
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SCHEDULER_LOCK(intSave);
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if (!IsCapPermit(CAP_CAPSET)) {
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SCHEDULER_UNLOCK(intSave);
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return -EPERM;
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}
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if (VALID_CAPS(caps, OsCurrProcessGet()->capability)) {
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SCHEDULER_UNLOCK(intSave);
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return -EPERM;
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}
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OsCurrProcessGet()->capability = caps;
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SCHEDULER_UNLOCK(intSave);
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return LOS_OK;
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}
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UINT32 SysCapGet(pid_t pid, UINT32 *caps)
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{
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UINT32 intSave;
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UINT32 kCaps;
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LosProcessCB *processCB = NULL;
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if ((OS_PID_CHECK_INVALID((UINT32)pid))) {
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return -EINVAL;
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}
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if (pid == 0) {
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processCB = OsCurrProcessGet();
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} else {
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processCB = OS_PCB_FROM_PID(pid);
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}
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SCHEDULER_LOCK(intSave);
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if (OsProcessIsInactive(processCB)) {
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SCHEDULER_UNLOCK(intSave);
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return -ESRCH;
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}
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kCaps = processCB->capability;
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SCHEDULER_UNLOCK(intSave);
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if (LOS_ArchCopyToUser(caps, &kCaps, sizeof(UINT32)) != LOS_OK) {
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return -EFAULT;
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}
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return LOS_OK;
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}
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