[LU-19583] TCU:Repeated deletion of same name file failed: "cannot remove 'filename': File exists"

• Type: Technical task
• Resolution: Unresolved
• Priority: Medium
• Environment: lustre release: 2.16.0_ddn37
• Severity: 2
• Assignee: Qian Yingjin
• Reporter: Tong Zhang

Description

Repeated deletion of files with the same name can fail in certain scenarios. Please refer to the following test case:

1. Create the following directory structure  
 

   [root@ai400-vm00 trash_1]# tree  
   .  
   ├── file1  
   └── subdir  
       └── file1  

2. Delete all files in the test directory  

   [root@ai400-vm00 trash_1]# rm -rf ./*  

3. Restore `.Trash/subdir/file1` back to `./file1`  

   [root@ai400-vm00 trash_1]# lfs trash mv .Trash/subdir/file1 ./file1  
   [root@ai400-vm00 trash_1]# cat file1  
   sub_file1  

   

4. Delete the `file1` that was just restored  

   [root@ai400-vm00 trash_1]# rm file1  
   rm: remove regular file 'file1'? yes  
   rm: cannot remove 'file1': File exists  

   

At this point, `rm` reports the error: cannot remove 'file1': File exists  
Moreover, the restored `file1` has been permanently deleted and did NOT go into .Trash