77 lines
2.7 KiB
C
77 lines
2.7 KiB
C
/*
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* Copyright (c) 2021-2021 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 "fs/mount.h"
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#include "path_cache.h"
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#include "vnode.h"
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#ifdef LOSCFG_DRIVERS_RANDOM
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#include "hisoc/random.h"
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#else
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#include "stdlib.h"
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#endif
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static LIST_HEAD *g_mountList = NULL;
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struct Mount* MountAlloc(struct Vnode* vnodeBeCovered, struct MountOps* fsop)
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{
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struct Mount* mnt = (struct Mount*)zalloc(sizeof(struct Mount));
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if (mnt == NULL) {
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PRINT_ERR("MountAlloc failed no memory!\n");
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return NULL;
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}
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LOS_ListInit(&mnt->activeVnodeList);
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LOS_ListInit(&mnt->vnodeList);
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mnt->vnodeBeCovered = vnodeBeCovered;
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vnodeBeCovered->newMount = mnt;
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#ifdef LOSCFG_DRIVERS_RANDOM
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HiRandomHwInit();
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(VOID)HiRandomHwGetInteger(&mnt->hashseed);
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HiRandomHwDeinit();
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#else
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mnt->hashseed = (uint32_t)random();
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#endif
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return mnt;
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}
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LIST_HEAD* GetMountList()
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{
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if (g_mountList == NULL) {
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g_mountList = zalloc(sizeof(LIST_HEAD));
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if (g_mountList == NULL) {
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PRINT_ERR("init mount list failed, no memory.");
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return NULL;
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}
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LOS_ListInit(g_mountList);
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}
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return g_mountList;
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}
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