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!151 [Desc] add debug code to fix bug: kernel crashed after rmdir the umounted folder, parentVnode->data null

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Merge pull request !151 from LeonChan/lc-master
This commit is contained in:
openharmony_ci
2021-04-19 11:00:57 +08:00
committed by Gitee
parent 23ee3689da 296274b60f
commit 75a85e4483
2 changed files with 16 additions and 5 deletions
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15
fs/vfs/vnode.c
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@@ -93,6 +93,8 @@ static struct Vnode *GetFromFreeList(void)
return vnode;
}
extern struct Vnode *g_parentOfCoveredVnode;
struct Vnode *VnodeReclaimLru(void)
{
struct Vnode *item = NULL;
@@ -107,11 +109,6 @@ struct Vnode *VnodeReclaimLru(void)
}
if (VnodeFree(item) == LOS_OK) {
for (int i = 0; i < g_coveredVnodeTop; i++) {
if (item == g_coveredVnodeList[i]) {
PRINT_ERR("%s-%d: reclaim mounted vnode. item=%p\n", __FUNCTION__, __LINE__, item);
}
}
releaseCount++;
}
if (releaseCount >= VNODE_LRU_COUNT) {
@@ -181,6 +178,14 @@ int VnodeFree(struct Vnode *vnode)
struct PathCache *nextItem = NULL;
VnodeHold();
for (int i = 0; i < g_coveredVnodeTop; i++) {
if (vnode == g_coveredVnodeList[i]) {
PRINT_ERR("%s-%d: reclaim mounted vnode. vnode=%p userCount=%d inode=%p\n", __FUNCTION__, __LINE__, vnode, vnode->useCount, vnode->data);
}
}
if (g_parentOfCoveredVnode == vnode) {
PRINT_ERR("%s-%d: reclaim parent of mounted vnode. vnode=%p userCount=%d inode=%p\n", __FUNCTION__, __LINE__, vnode, vnode->useCount, vnode->data);
}
if (vnode->useCount > 0) {
VnodeDrop();
return -EBUSY;