On Sat, May 19, 2001 at 08:05:02PM +0200, [EMAIL PROTECTED] wrote:
initrd is an unnecessary pain in the ass for most people.
It had better not become mandatory.
You would not notice the difference, only your kernel would be
a bit smaller and the RRPART ioctl disappears.
Would I not
Jeff Garzik wrote:
Notice also a metadata miscdev solves the problem of passing options
on open -- just pass those options to the miscdev before you open it...
to be more clear, it == the data device, not the metadata miscdev
--
Jeff Garzik | Do you have to make light of everything?!
On Sat, 19 May 2001, Andrew Morton wrote:
So. When am I going to be able to:
open(/bin/ls,-l,/etc/passwd, O_RDONLY);
You are not. Think for a minute and you'll see why.
Linus' idea of /dev/tty/parameters is marginally sane - it makes sense
to consider that as
On Sat, May 19, 2001 at 05:25:22PM +0100, Alan Cox wrote:
Only to an English speaker. I suspect Quebec City canadians would prefer a
different command set.
Should we support `pas387' as well as `no387' as a kernel boot parameter
then? Face it, a sysadmin has to know the limited subset of
On Sat, 19 May 2001, Matthew Wilcox wrote:
On Sat, May 19, 2001 at 12:51:07PM -0400, Alexander Viro wrote:
clone(), walk(), clunk(), stat() and open() ;-) Basically, we can add
unopened descriptors. I.e. no IO until you open it (turning the thing into
opened one), but we can do lookups
On Sat, 19 May 2001, Ben LaHaise wrote:
On Sat, 19 May 2001, Alexander Viro wrote:
On Sat, 19 May 2001, Ben LaHaise wrote:
It's not done yet, but similar techniques would be applied. I envision
that a raid device would support operations such as
On Sat, 19 May 2001, Brad Boyer wrote:
If I understand the status of stuff correctly, I think this would make it
a lot more painful to admin if it became a requirement to use initrd on
everything just to be able to boot.
Don't get too hung up on initrd. Symbolic links really _are_ workable
On Sat, 19 May 2001, Alexander Viro wrote:
On Sun, 20 May 2001, Edgar Toernig wrote:
That assumption is totally bogus. Even for regular files you have side
effects (atime); for anything else they're unpredictable.
That means only one thing: safe backups are possible only in
Opening device files often has interesting side effects.
Too bad. They can be triggered by similar races between attacker
changing the type of object (file-symlink) and backup.
Yes. This is a well-known security problem.
Doing
stat(file, s);
if (action desired) {
On Sat, 19 May 2001, Alexander Viro wrote:
Folks, before you get all excited about cramming side effects into
open(2), consider the following case:
Your argument is stupid, imnsho.
Side-effects are perfectly fine if they are _local_ to the file
descriptor. Your example is contrieved
Are we talking about device arguments just for chrdevs and blkdevs?
(ie. drivers) or for regular files too?
Speaking about drivers specifically, a controlling miscdev, one per
device or one per group of devices depending on your needs, is a much
more clean solution for passing ioctl-type data.
On Sat, 19 May 2001, Andrew Clausen wrote:
(1) these issues are independent. The partition parsing could
be done in user space, today, by blkpg, if I read the code correctly
;-) (there's an ioctl for [un]registering partitions) Never
tried it though ;-)
I tried to imply that through the
Andries Brouwer writes:
Andrew Morton writes:
(2) what about bootstrapping? how do you find the root device?
Do you do root=/dev/hda/offset=63,limit=1235823? Bit nasty.
Ben's patch makes initrd mandatory.
Can this be fixed? I've *never* had to futz with
On Sat, 19 May 2001, Alexander Viro wrote:
On Sat, 19 May 2001, Ben LaHaise wrote:
It's not done yet, but similar techniques would be applied. I envision
that a raid device would support operations such as
open(/dev/md0/slot=5,hot-add=/dev/sda)
Think for a moment and you'll see why
initrd is an unnecessary pain in the ass for most people.
It had better not become mandatory.
You would not notice the difference, only your kernel would be
a bit smaller and the RRPART ioctl disappears.
[Besides: we have lived with DOS-type partition tables for ten years,
but they will not
nitpicking: a system call without side effects would be pretty useless.
Alexander Viro wrote:
A lot of stuff relies on the fact that close(open(foo, O_RDONLY)) is a
no-op. Breaking that assumption is a Bad Thing(tm).
That assumption is totally bogus. Even for regular files you have side
Folks, before you get all excited about cramming side effects into
open(2), consider the following case:
1) opening /dev/zero/start_nuclear_war has a certain side effect.
2) Local user does the following:
ln -sf /dev/zero/start_nuclear_war bar
while true; do
Hi,
I'm having difficulties with a RTL8139 with Linux 2.2.19 (both drivers),
but not with Linux 2.4.4's 8139too driver. The card is an Allied Telesyn
AT-2500TX, the chip is reported as 8139C/rev. 0x10. The card shares its
IRQ 9 with an nVidia Riva TNT 128 [NV04], rev. 4.
(eth0 is a 3C900 Combo
On Sat, 19 May 2001, Abramo Bagnara wrote:
Can't this easily avoided if the needed action is not
/dev/zero/start_nuclear_war
or
/dev/zero/start_nuclear_war
but
echo I'm evil /dev/zero/start_nuclear_war
Sure. And that's the right thing to do (not the implied action, that is -
[EMAIL PROTECTED] wrote:
Hmm. You know that I wrote this long ago?
Well, let's not get too hung up on the disk thing (yeah,
I started it...).
Ben's intent here is to *demonstrate* how argv-style
info can be passed into device nodes. It seems neat,
and nice.
We can also make use of a strong
On Sat, 19 May 2001, Andrew Clausen wrote:
(1) these issues are independent. The partition parsing could
be done in user space, today, by blkpg, if I read the code correctly
;-) (there's an ioctl for [un]registering partitions) Never
tried it though ;-)
ioctls are even more evil than
On Sat, May 19, 2001 at 12:51:07PM -0400, Alexander Viro wrote:
clone(), walk(), clunk(), stat() and open() ;-) Basically, we can add
unopened descriptors. I.e. no IO until you open it (turning the thing into
opened one), but we can do lookups (move to child), we can clone and
kill them and
On Sat, May 19, 2001 at 03:02:47PM +0100, Alan Cox wrote:
ioctls are evil, period. At least with these names you can use normal
scripting and don't need any special tools. Every ioctl means a binary
that has no business to exist.
That is not IMHO a rational argument. It isn't my fault
On Sat, 19 May 2001, Ben LaHaise wrote:
It's not done yet, but similar techniques would be applied. I envision
that a raid device would support operations such as
open(/dev/md0/slot=5,hot-add=/dev/sda)
Think for a moment and you'll see why it's not only ugly as hell, but simply
won't
Alexander Viro wrote:
It's way past ugly.
I knew you'd like it.
It kind of makes sense, because it puts the two primary stream-of-bytes
objects in Unix into the same namespace, with the same accessors.
So if some random application is expecting a filename well heck, you
just give it a
On Sat, May 19, 2001 at 01:30:14PM +0200, [EMAIL PROTECTED] wrote:
I don't think so. It is necessary, and it is good.
But it is easy to make the transition painless.
Instead of the current choice between INITRD (yes/no)
we have INITRD (default built-in / external).
The built-in version can
On Sat, 19 May 2001, Jeff Garzik wrote:
Are we talking about device arguments just for chrdevs and blkdevs?
(ie. drivers) or for regular files too?
Let's distinguish between per-fd effects (that's what name in open(name, flags)
is for - you are asking for descriptor and telling what
On Sun, 20 May 2001, Ingo Oeser wrote:
PS: English is neither mine, nor Linus native language. Why do
the English natives complain instead of us? ;-)
Because we had some experience with, erm, localized systems and for
Alan it's most likely pure theory? ;-)
I think its important its
On Sun, 20 May 2001, Ingo Oeser wrote:
PS: English is neither mine, nor Linus native language. Why do
the English natives complain instead of us? ;-)
Because we had some experience with, erm, localized systems and for
Alan it's most likely pure theory? ;-)
Now that I'm awake and refreshed, yeah, that's awful. But
echo hot-add,slot=5,device=/dev/sda /dev/md0/control *is* sane. Heck,
the system can even send back result codes that way.
Only to an English speaker. I suspect Quebec City canadians would prefer a
different command set.
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