[PATCH] afs: proc cells and rootcell are writeable

[David Howells]

Eric W. Biederman <ebiederm at xmission.com> wrote:

> These files have been read-only since this code was merged in 2002.
> Over a decade of not being used seems like a strong indication that no
> one cares about the write path.

Actually, things aren't as simple as they seem.  Without the patch applied:

	[root at andromeda ~]# ls -l /proc/fs/afs/cells
	-r--r--r--. 1 root root 0 Jan 31 00:04 /proc/fs/afs/cells
	[root at andromeda ~]# echo add your-file-system.com 204.29.154.37 >/proc/fs/afs/cells
	[root at andromeda ~]# 

You'll observe there is no error reported on the echo command.

Further, looking in dmesg, I see:

	kAFS: Added new cell 'your-file-system.com'

So the file *is* writable, *despite* i_mode.

David