fix: kernel crashed after rmdir the umounted folder

Close: I3NGBT
Change-Id: I70130c42061e51f5978b48befea66a5925386343

fs/jffs2/src/vfs_jffs2.c

@@ -145,7 +145,6 @@ int VfsJffs2Bind(struct Mount *mnt, struct Vnode *blkDriver, const void *data)
 
     g_jffs2PartList[partNo] = blkDriver;
 
-    PRINTK("%s-%d: vnode=%p, inode=%p, i_nlink=%d\n", __FUNCTION__, __LINE__, pv, rootNode, rootNode->i_nlink);
     LOS_MuxUnlock(&g_jffs2FsLock);
 
     return 0;
@@ -220,6 +219,9 @@ int VfsJffs2Lookup(struct Vnode *parentVnode, const char *path, int len, struct
 
     Jffs2SetVtype(node, newVnode);
     node->i_vnode = newVnode;
+    if (&g_jffs2Vops != parentVnode->vop) {
+        LOS_Panic("jffs2 vop failed");
+    }
     newVnode->vop = parentVnode->vop;
     newVnode->fop = parentVnode->fop;
     newVnode->data = node;
@@ -232,7 +234,6 @@ int VfsJffs2Lookup(struct Vnode *parentVnode, const char *path, int len, struct
     (void)VfsHashInsert(newVnode, node->i_ino);
 
     *ppVnode = newVnode;
-    PRINTK("%s-%d: vnode=%p, inode=%p, i_nlink=%d path=%s\n", __FUNCTION__, __LINE__, newVnode, node, node->i_nlink, path);
 
     LOS_MuxUnlock(&g_jffs2FsLock);
     return 0;
@@ -260,6 +261,9 @@ int VfsJffs2Create(struct Vnode *parentVnode, const char *path, int mode, struct
     newVnode->type = VNODE_TYPE_REG;
     newNode->i_vnode = newVnode;
     newVnode->vop = parentVnode->vop;
+    if (&g_jffs2Vops != parentVnode->vop) {
+        LOS_Panic("jffs2 vop failed");
+    }
     newVnode->fop = parentVnode->fop;
     newVnode->data = newNode;
     newVnode->parent = parentVnode;
@@ -271,7 +275,6 @@ int VfsJffs2Create(struct Vnode *parentVnode, const char *path, int mode, struct
     (void)VfsHashInsert(newVnode, newNode->i_ino);
 
     *ppVnode = newVnode;
-    PRINTK("%s-%d: vnode=%p, inode=%p, i_nlink=%d path=%s\n", __FUNCTION__, __LINE__, newVnode, newNode, newNode->i_nlink, path);
 
     LOS_MuxUnlock(&g_jffs2FsLock);
     return 0;
@@ -531,6 +534,9 @@ int VfsJffs2Mkdir(struct Vnode *parentNode, const char *dirName, mode_t mode, st
     newVnode->type = VNODE_TYPE_DIR;
     node->i_vnode = newVnode;
     newVnode->vop = parentNode->vop;
+    if (&g_jffs2Vops != parentVnode->vop) {
+        LOS_Panic("jffs2 vop failed");
+    }
     newVnode->fop = parentNode->fop;
     newVnode->data = node;
     newVnode->parent = parentNode;
@@ -542,7 +548,6 @@ int VfsJffs2Mkdir(struct Vnode *parentNode, const char *dirName, mode_t mode, st
     *ppVnode = newVnode;
 
     (void)VfsHashInsert(newVnode, node->i_ino);
-    PRINTK("%s-%d: vnode=%p, inode=%p, i_nlink=%d path=%s\n", __FUNCTION__, __LINE__, newVnode, node, node->i_nlink, dirName);
 
     LOS_MuxUnlock(&g_jffs2FsLock);
 
@@ -597,8 +602,6 @@ int VfsJffs2Chattr(struct Vnode *pVnode, struct IATTR *attr)
     return ret;
 }
 
-extern struct Vnode *g_parentOfCoveredVnode;
-
 int VfsJffs2Rmdir(struct Vnode *parentVnode, struct Vnode *targetVnode, char *path)
 {
     int ret;
@@ -609,10 +612,6 @@ int VfsJffs2Rmdir(struct Vnode *parentVnode, struct Vnode *targetVnode, char *pa
 
     LOS_MuxLock(&g_jffs2FsLock, (uint32_t)JFFS2_WAITING_FOREVER);
 
-    if (parentVnode->data == NULL) {
-        PRINT_ERR("%s-%d: rmdir parent of mounted vnode. vnode=%p userCount=%d inode=%p\n", __FUNCTION__, __LINE__, parentVnode, parentVnode->useCount, parentVnode->data);
-        PRINT_ERR("%s-%d: global rmdir parent of mounted vnode. vnode=%p userCount=%d inode=%p\n", __FUNCTION__, __LINE__, g_parentOfCoveredVnode, g_parentOfCoveredVnode->useCount, g_parentOfCoveredVnode->data);
-    }
     ret = jffs2_rmdir((struct jffs2_inode *)parentVnode->data, (struct jffs2_inode *)targetVnode->data,
                       (const unsigned char *)path);
 

fs/vfs/vnode.c

@@ -44,9 +44,6 @@ static LosMux g_vnodeMux;
 static struct Vnode *g_rootVnode = NULL;
 static struct VnodeOps g_devfsOps;
 
-extern int g_coveredVnodeTop;
-extern struct Vnode *g_coveredVnodeList[100];
-
 #define ENTRY_TO_VNODE(ptr)  LOS_DL_LIST_ENTRY(ptr, struct Vnode, actFreeEntry)
 #define VNODE_LRU_COUNT      10
 #define DEV_VNODE_MODE       0755
@@ -92,8 +89,6 @@ static struct Vnode *GetFromFreeList(void)
     return vnode;
 }
 
-extern struct Vnode *g_parentOfCoveredVnode;
-
 struct Vnode *VnodeReclaimLru(void)
 {
     struct Vnode *item = NULL;
@@ -164,7 +159,6 @@ int VnodeAlloc(struct VnodeOps *vop, struct Vnode **newVnode)
     VnodeDrop();
 
     *newVnode = vnode;
-    PRINTK("%s-%d: vnode=%p userCount=%d inode=%p\n", __FUNCTION__, __LINE__, vnode, vnode->useCount, vnode->data);
 
     return LOS_OK;
 }
@@ -178,14 +172,6 @@ int VnodeFree(struct Vnode *vnode)
     struct PathCache *nextItem = NULL;
 
     VnodeHold();
-    for (int i = 0; i < g_coveredVnodeTop; i++) {
-        if (vnode == g_coveredVnodeList[i]) {
-            PRINTK("%s-%d: reclaim mounted vnode. vnode=%p userCount=%d inode=%p\n", __FUNCTION__, __LINE__, vnode, vnode->useCount, vnode->data);
-        }
-    }
-    if (g_parentOfCoveredVnode == vnode) {
-        PRINTK("%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;
@@ -204,7 +190,6 @@ int VnodeFree(struct Vnode *vnode)
         vnode->vop->Reclaim(vnode);
     }
 
-    PRINTK("%s-%d: vnode=%p userCount=%d inode=%p\n", __FUNCTION__, __LINE__, vnode, vnode->useCount, vnode->data);
     LOS_ListDelete(&vnode->actFreeEntry);
     memset_s(vnode, sizeof(struct Vnode), 0, sizeof(struct Vnode));
     LOS_ListAdd(&g_vnodeFreeList, &vnode->actFreeEntry);