Re: [SSI-devel] error when write to device on readonly chard mounted filesystem

[John H. <john@Calva.COM>]

John Hughes wrote:
> I'm sure I've seen something about this bug before, but using the kernel
> from current OpenSSI CVS:
>
>     # mount -o ro LABEL=/crud /crud
>     # ls -l /crud/console
>     crw------- 1 root root 5, 1 2007-05-08 18:19 /crud/console
>     # echo "boo" > /crud/console
>     boo
>     # umount /crud
>     # mount -o ro,chard LABEL=/crud /crud
>     # echo "boo" >/crud/console
>     /crud/console: Permission denied
>
> (Odd, I'm pretty sure I've seen EROFS (write to read-only filesysem),
> but all my tests are showing EACCESS (Permission denied) now.
>
> Roger, didn't I see you fixing a bug like this?
>   
Same problem as the MS_PAMWHATEVER on FC, in mount.c we have:

#define MS_GROUP        0x08000000

Which happens to be the same as MS_CHARD.