1 /*
2 * Copyright (c) 2021-2021 Huawei Device Co., Ltd. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without modification,
5 * are permitted provided that the following conditions are met:
6 *
7 * 1. Redistributions of source code must retain the above copyright notice, this list of
8 * conditions and the following disclaimer.
9 *
10 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
11 * of conditions and the following disclaimer in the documentation and/or other materials
12 * provided with the distribution.
13 *
14 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
15 * to endorse or promote products derived from this software without specific prior written
16 * permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
22 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
25 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
27 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
28 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "fs/mount.h"
32 #include "path_cache.h"
33 #include "vnode.h"
34 #ifdef LOSCFG_DRIVERS_RANDOM
35 #include "hisoc/random.h"
36 #else
37 #include "stdlib.h"
38 #endif
39
40 static LIST_HEAD *g_mountList = NULL;
41
MountAlloc(struct Vnode * vnodeBeCovered,struct MountOps * fsop)42 struct Mount* MountAlloc(struct Vnode* vnodeBeCovered, struct MountOps* fsop)
43 {
44 struct Mount* mnt = (struct Mount*)zalloc(sizeof(struct Mount));
45 if (mnt == NULL) {
46 PRINT_ERR("MountAlloc failed no memory!\n");
47 return NULL;
48 }
49
50 LOS_ListInit(&mnt->activeVnodeList);
51 LOS_ListInit(&mnt->vnodeList);
52
53 mnt->vnodeBeCovered = vnodeBeCovered;
54 vnodeBeCovered->newMount = mnt;
55 #ifdef LOSCFG_DRIVERS_RANDOM
56 HiRandomHwInit();
57 (VOID)HiRandomHwGetInteger(&mnt->hashseed);
58 HiRandomHwDeinit();
59 #else
60 mnt->hashseed = (uint32_t)random();
61 #endif
62 return mnt;
63 }
64
GetMountList()65 LIST_HEAD* GetMountList()
66 {
67 if (g_mountList == NULL) {
68 g_mountList = zalloc(sizeof(LIST_HEAD));
69 if (g_mountList == NULL) {
70 PRINT_ERR("init mount list failed, no memory.");
71 return NULL;
72 }
73 LOS_ListInit(g_mountList);
74 }
75 return g_mountList;
76 }
77