In <Pine.LNX.4.10.10007211109230.13659-100000@master.linux-ide.org> Andre Hedrick (andre@linux-ide.org) wrote:
> On 21 Jul 2000, Henning P. Schmiedehausen wrote:
>> There is simply no point in hiding anything from root.
> I am not hiding anything, you as root must make a choice to expose full
> unrestricted access to the hardware or filter for correct usage.
It's policy. Policy does not belond to kernel. Period.
>> What I tried to understand in between Andre's swearwords, is that you
> Sorry, but this is very serious to me (fist fights not excluded to win).
>> can enable drives to access a full set of parameters ("taskfile") or
>> you can disable this. If you enable it, you can fry the drive. If you
>> disable it, you can't but you can still use the regular ATA command
>> set which is all that the kernel will ever need.
> You only need access to the commands that are used and described in the
> ATA-ATAPI specification.
No. You :
1. need access to hardware (if you have CAP_SYS_RAW) and then you'll have FULL
access to hardware
or
2. do not need access to hardware at all and removed CAP_SYS_RAW from system
If you need filtering - feel free to implement it in libata.so ...
> You do not need to send commands to the drives that violate the standard
> making :
Huh ? Why not ?
> LINUX NON-ATA-ATAPI COMPLIANT!
This is bold accusation and if we'll get such accisating then we'll have to
point out that:
1. DOS is non-ATA-ATAPI compliant
2. Windows9X is non-ATA-ATAPI compilant
3. WindowsNT/Windows2000 pro is non-ATA-ATAPI compilant
4. Probably any other OS for PC out there are non-ATA-ATAPI compliat as well
All of above is right when you are superuser in system (Administator in
WindowsNT/Windows2000 case) in default configuration - just like Linux case.
For 1., 2. and 3. I know peoples who will be able to do working .VxD and .SYS
files to make ubuse of IDE/ATAPI drivers possible (I can try to find peoples
who will be able to do the same for FreeBSD, Mac OS, BeOS, etc if needed).
Then we'll have simple fact: if you are used your IDE/ATAPI drive in PC with
[almost] any PC OS you used it with non-ATA-ATAPI compilant and thus lost
warranty. I think on this stage general public can be notified and then
manufacturers will have BIG pressure to change specification.
> Here is a good phrase.
>> The question now is: Once you disabled this, you can't enable it
>> again? If this is truw, then I can understand many of the strange
>> words that Andre used (though I still think that he was/is under deep
>> sleep deprivation and strong drugs). If you can reenable this access,
>> then there is no point.
> I do take strong drugs to keep me from getting hyper.
> The access decision is made at compile time.
And any such decision made at compile time can be changed in run-time via
clever poking in memory. I know how to do this with Windows9X/NT/2000pro
and Linux (at least).
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This archive was generated by hypermail 2b29 : Sun Jul 23 2000 - 21:00:19 EST