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

Mon, 16 Dec 2013 14:35:40 +0000

On the first client, create and change to a directory.
c1$ mkdir /mnt/lustre/dir1; cd /mnt/lustre/dir1
Then, on the second, rename that directory:
c2$ mv /mnt/lustre/dir1 /mnt/lustre/dir2
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 ..
Now everything appears to be consistent on c1.

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