[LU-220] renaming the cwd of a process on another client exposes some dcache weirdness

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.3.0
• Affects Version/s: Lustre 2.1.0
• Environment: $ uname -r; 2.6.18-194.17.1.el5; $ cat /proc/fs/lustre/version ; lustre: 2.0.59; kernel: patchless_client; build: jenkins-g3dcb5fb-PRISTINE-2.6.18-194.17.1.el5
• Severity: 3
• Assignee: nasf (Inactive)
• Reporter: John Hammond

Description

1. On the first client, create and change to a directory.
   c1$ mkdir /mnt/lustre/dir1; cd /mnt/lustre/dir1
2. Then, on the second, rename that directory:
   c2$ mv /mnt/lustre/dir1 /mnt/lustre/dir2
3. Back on the first client, open(".", O_DIRECTORY...) will fail.
   c1$ ls
   /bin/ls: .: No such file or directory
   c$ pwd
   /mnt/lustre/dir1
   c1$ readlink /proc/$$/cwd
   /mnt/lustre/dir1
   c1$ stat .
   File: `.'
   Size: 4096 Blocks: 8 IO Block: 4096 directory
   Device: 2c54f966h/743766374d Inode: 144115205272502273 Links: 2
   Access: (0755/drwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)
   Access: 2011-04-18 21:12:24.000000000 -0500
   Modify: 2011-04-18 21:12:24.000000000 -0500
   Change: 2011-04-18 21:12:33.000000000 -0500
   c1$ stat ../dir2
   File: `../dir2'
   Size: 4096 Blocks: 8 IO Block: 4096 directory
   Device: 2c54f966h/743766374d Inode: 144115205272502273 Links: 2
   Access: (0755/drwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)
   Access: 2011-04-18 21:12:24.000000000 -0500
   Modify: 2011-04-18 21:12:24.000000000 -0500
   Change: 2011-04-18 21:12:33.000000000 -0500
   c1$ touch foo
   c1$ ls
   ls: .: No such file or directory
   c1$ ls foo
   foo
   c1$ cd ..
4. Now everything appears to be consistent on c1.