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On Fri, Dec 26, 2008 at 01:26, Karel Zak <kzak@redhat.com> wrote:
> On Fri, Dec 26, 2008 at 12:39:16AM +0100, Kay Sievers wrote:
>> On Fri, Dec 26, 2008 at 00:26, Karel Zak <kzak@redhat.com> wrote:
>> > The upstream raw(8) command supports /dev/rawctl and also
>> > /dev/raw/rawctl. I think it makes more sense to use raw/rawctl when
>> > you have all your raw devices in raw/ subdirectory (e.g. /dev/raw/raw<N>).
>>
>> The raw tool looks for /dev/rawctl first and the fallback to
>> /dev/raw/rawctl is named DEVFS_*. Should we turn that order around and
>> remove the devfs notion from the raw tool and let udev create a
>> dev/raw/rawctl node?
>
> Yeah. Fixed, committed and pushed.
>
> $ strace -e open ./raw
> open("/dev/raw/rawctl", O_RDWR) = -1 ENOENT (No such file or directory)
> open("/dev/rawctl", O_RDWR) = -1 ENOENT (No such file or directory)
>
> I have also removed the #ifdef OLD_RAW_DEVS (/dev/raw<N>) junk.
A note on /dev/raw1394's security implications:
1. You cannot access local memory through raw1394, except
for ROMs and CSRs that are exposed to other nodes any way.
2. It is extremely hard to manipulate data on attached
SBP-2 devices (FireWire storage devices).
3. You can disturb operation of the FireWire bus, e.g.
creating a DoS situation for audio/video applications, for
SBP-2 devices, or eth1394 network interfaces.
4. If another PC is attached to the FireWire bus, it may be
possible to read or overwrite the entire RAM of that remote PC.
This depends on the PC's configuration. Most FireWire controllers
support this feature (yes, it's not a bug, or at least wasn't
intended to be one...) but not all OSs enable the feature.
Actually, a cheap setup to achieve #1 by #4 is to have two
FireWire controllers in the PC and connect them.
https://bugs.launchpad.net/ubuntu/+source/kino/+bug/6290/comments/21
specialix_rioctl: no kernel name symlink
specialix_sxctl: no kernel name symlink
bus/usb: 0644 -> 0664
ppdev: lp
dri: 0666 -> 0660
js: no kernel name symlink
On Thu, Oct 30, 2008 at 03:55, Tejun Heo <tj@kernel.org> wrote:
The appropriate default timeout differs depending on the transport and
the type of the attached device, so the above two rules harm more than
help. The affect of the above two rules weren't visible for some
reason but with recent block layer timeout update, they actually work
and cause problems.
Opening an optical drive device node without O_NONBLOCK autocloses the
tray, we run vol_id on every media change by kernel emitted "change"
events, which can make it hard to change the media when the tray closes
immediatey again.:) We check for cdrom_id to indicate an existing track,
if no media is found, we will not open the device with vol_id.
Thanks to Christian Krause and DavidZ for debugging and testing.
None of these rules is supposed to be changed by users, so move
them out of /etc. Custom rules, and automatically generated rules
stay in /etc. All rules are still processed in lexical order,
regardless which directory they live in.
