Re: nullfs mount ignores readonly flag

[David Beck <dbeck@xxxxxxxxxxxxx>]

Would that fix mean that the no-setuid, no-exec and other flags will 
work as well?

Regards, David.


Matthew Dillon wrote:

>    I expect there will be things that need working on.  That's one of
>    them.  Hmm.  We will probably have to hold the namecache entry for
>    normal files and use the namecache's mount point to check for the
>    read-only filesystem status.  No biggy (we already do this for 
>    directories to maintain the CD path), but it may take a few days to
>    fix.
>
> 					-Matt
> 					Matthew Dillon 
> 					<dillon@xxxxxxxxxxxxx>
>
> :Hello,
> :
> :A few experiments on 1.5 nullfs showed that it ignores the read-only flag:
> :
> :/mnt: mkdir 1 2
> :/mnt: mount_null -o ro /mnt/1 /mnt/2
> :/mnt: mount
> :..
> :/mnt/1 on /mnt/2 (null, local, read-only)
> :/mnt: cd /mnt/1
> :/mnt/1: echo > k
> :/mnt/1: cd /mnt/2
> :/mnt/2: rm k
> :/mnt/2: ls
> :/mnt/2: cd /mnt/1
> :/mnt/1: ls -ltr
> :total 0
> :/mnt/1:
> :
> :
> :I could delete a file on a read-only filesystem. Oops.
> :
> :Regards, David.
>
>
>