69 lines
2.4 KiB
C
69 lines
2.4 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 <sys/statfs.h>
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#include <sys/mount.h>
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#include "proc_fs.h"
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#include "los_trace.h"
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#ifdef LOSCFG_KERNEL_TRACE
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static int KernelTraceProcFill(struct SeqBuf *m, void *v)
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{
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(void)v;
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if (m == NULL) {
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return -LOS_EPERM;
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}
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if (m->buf == NULL) {
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m->buf = (char *)LOS_TraceBufDataGet(&(m->size), &(m->count));
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}
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return 0;
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}
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static const struct ProcFileOperations KERNEL_TRACE_PROC_FOPS = {
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.read = KernelTraceProcFill,
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};
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#endif
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void ProcKernelTraceInit(void)
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{
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#ifdef LOSCFG_KERNEL_TRACE
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struct ProcDirEntry *pde = CreateProcEntry("ktrace", 0, NULL);
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if (pde == NULL) {
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PRINT_ERR("create /proc/ktrace error!\n");
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return;
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}
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pde->procFileOps = &KERNEL_TRACE_PROC_FOPS;
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#endif
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}
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