139 lines
4.3 KiB
C
139 lines
4.3 KiB
C
/*
|
|
* Copyright (c) 2021-2021 Huawei Device Co., Ltd. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without modification,
|
|
* are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this list of
|
|
* conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
|
|
* of conditions and the following disclaimer in the documentation and/or other materials
|
|
* provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the copyright holder nor the names of its contributors may be used
|
|
* to endorse or promote products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
|
|
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
|
|
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "los_mux.h"
|
|
#include "fs/vnode.h"
|
|
|
|
|
|
#define VNODE_HASH_BUCKETS 128
|
|
|
|
LIST_HEAD g_vnodeHashEntrys[VNODE_HASH_BUCKETS];
|
|
uint32_t g_vnodeHashMask = VNODE_HASH_BUCKETS - 1;
|
|
uint32_t g_vnodeHashSize = VNODE_HASH_BUCKETS;
|
|
uint32_t g_curVnodeSize = 0;
|
|
|
|
static LosMux g_vnodeHashMux;
|
|
|
|
int VnodeHashInit(void)
|
|
{
|
|
int ret;
|
|
for (int i = 0; i < g_vnodeHashSize; i++) {
|
|
LOS_ListInit(&g_vnodeHashEntrys[i]);
|
|
}
|
|
|
|
ret = LOS_MuxInit(&g_vnodeHashMux, NULL);
|
|
if (ret != LOS_OK) {
|
|
PRINT_ERR("Create mutex for vnode hash list fail, status: %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
return LOS_OK;
|
|
}
|
|
|
|
void VnodeHashDump(void)
|
|
{
|
|
PRINTK("-------->VnodeHashDump in\n");
|
|
(void)LOS_MuxLock(&g_vnodeHashMux, LOS_WAIT_FOREVER);
|
|
for (int i = 0; i < g_vnodeHashSize; i++) {
|
|
LIST_HEAD *nhead = &g_vnodeHashEntrys[i];
|
|
struct Vnode *node = NULL;
|
|
|
|
LOS_DL_LIST_FOR_EACH_ENTRY(node, nhead, struct Vnode, hashEntry) {
|
|
PRINTK(" vnode dump: col %d item %p\n", i, node);
|
|
}
|
|
}
|
|
(void)LOS_MuxUnlock(&g_vnodeHashMux);
|
|
PRINTK("-------->VnodeHashDump out\n");
|
|
}
|
|
|
|
uint32_t VfsHashIndex(struct Vnode *vnode)
|
|
{
|
|
if (vnode == NULL) {
|
|
return -EINVAL;
|
|
}
|
|
return (vnode->hash + vnode->originMount->hashseed);
|
|
}
|
|
|
|
static LOS_DL_LIST *VfsHashBucket(const struct Mount *mp, uint32_t hash)
|
|
{
|
|
return (&g_vnodeHashEntrys[(hash + mp->hashseed) & g_vnodeHashMask]);
|
|
}
|
|
|
|
int VfsHashGet(const struct Mount *mount, uint32_t hash, struct Vnode **vnode, VfsHashCmp *fn, void *arg)
|
|
{
|
|
struct Vnode *curVnode = NULL;
|
|
|
|
if (mount == NULL || vnode == NULL) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
(void)LOS_MuxLock(&g_vnodeHashMux, LOS_WAIT_FOREVER);
|
|
LOS_DL_LIST *list = VfsHashBucket(mount, hash);
|
|
LOS_DL_LIST_FOR_EACH_ENTRY(curVnode, list, struct Vnode, hashEntry) {
|
|
if (curVnode->hash != hash) {
|
|
continue;
|
|
}
|
|
if (curVnode->originMount != mount) {
|
|
continue;
|
|
}
|
|
if (fn != NULL && fn(curVnode, arg)) {
|
|
continue;
|
|
}
|
|
(void)LOS_MuxUnlock(&g_vnodeHashMux);
|
|
*vnode = curVnode;
|
|
return LOS_OK;
|
|
}
|
|
(void)LOS_MuxUnlock(&g_vnodeHashMux);
|
|
*vnode = NULL;
|
|
return LOS_NOK;
|
|
}
|
|
|
|
void VfsHashRemove(struct Vnode *vnode)
|
|
{
|
|
if (vnode == NULL) {
|
|
return;
|
|
}
|
|
(void)LOS_MuxLock(&g_vnodeHashMux, LOS_WAIT_FOREVER);
|
|
LOS_ListDelete(&vnode->hashEntry);
|
|
(void)LOS_MuxUnlock(&g_vnodeHashMux);
|
|
}
|
|
|
|
int VfsHashInsert(struct Vnode *vnode, uint32_t hash)
|
|
{
|
|
if (vnode == NULL) {
|
|
return -EINVAL;
|
|
}
|
|
(void)LOS_MuxLock(&g_vnodeHashMux, LOS_WAIT_FOREVER);
|
|
vnode->hash = hash;
|
|
LOS_ListHeadInsert(VfsHashBucket(vnode->originMount, hash), &vnode->hashEntry);
|
|
(void)LOS_MuxUnlock(&g_vnodeHashMux);
|
|
return LOS_OK;
|
|
}
|