More whine about locking

More whine about locking

[Siim Vahtre]

Hi again.

Many weeks have passed but problem is still there.

No matter how I mount the disk or what 'layers' there are - dosemu
seem to NEVER care about the locks made by Windows clients or by
other dosemu clients. And I am not talking about database locking or
something. NC's "edit" and "view" doesn't lock files either.

I think I've tried everything now.
The disk they are sharing have been mounted with NFS, SMB, NetWare
and even directly(psyhical drive). None of them made any difference.
No locking whatsoever.

I also tried different OSes (DrDos and FreeDOS) - no luck.

Only lock that I was able to get was "DenyMode: DENY_NONE | Oplock: NONE"
which is quite useless and didn't stop anyone to edit one file twice.

Tried dosemu versions were (1.0.2), (1.1.3) and (1.1.3.7)
Kernel(vanilla) is 2.4.19

ANY help to get this locking working is appreciated.
I really don't know what to try next :(

Re: More whine about locking

[Bart Oldeman]

On Sun, 24 Nov 2002, Siim Vahtre wrote:

> Many weeks have passed but problem is still there.

Try the assembly program below and assemble using
nasm lockdos.asm -o lockdos.com
copy lockdos.com and lockdos.asm to the same directory.

Run two DOSEMU instances.
In one of them, run lockdos.
This will let you select how to lock lockdos.asm

In the other one, try
type lockdos.asm

In my experiment, with C: lredir'ed to an ext2 partition,
using option 1 and 3, the "type" refused to read the file.

So file locking works, right? I'm just not sure what I'm missing here.

Bart

	org 100h
	xor bx, bx
lop:
	mov ah, 9
	mov dx, string
	int 21h
	mov ah, 1
	int 21h
	sub al, '0'
	cmp al, 5
	jae quit
	push ax
	or bx, bx
	jz dontclose
        mov ah, 3eh
        int 21h         ; close file
dontclose:
	pop ax
	shl al, 4
	or al, 2
	mov dx, filename
	mov ah, 3dh
	int 21h		; open r/w
	mov bx, ax
	jmp short lop
quit:
	ret

string  db 13,10,'Enter locking mode: ', 13, 10
	db '0: compatibility', 13, 10,
	db '1: DENYALL', 13, 10,
	db '2: DENYWRITE', 13, 10,
	db '3: DENYREAD', 13, 10,
	db '4: DENYNONE', 13, 10,
	db '5: quit', 13, 10, '$'
filename db 'lockdos.asm', 0

Re: More whine about locking

[Siim Vahtre]

> So file locking works, right? I'm just not sure what I'm missing here.

Thank you for your reply.

I regret to announce that this program prove what I already said in first
mail in this thread - no locking whatsoever.

I tried all of those locking types. Even when I switched to DENY_ALL with
this asm program, I was still able to read, write, delete etc the file.
(And with 'smbstatus' I saw only "DENY_NONE" all the time.)

The disk they share is ext3 fs mounted with lredir.
I also tried disk mounted via samba, NFS, NC and so on. No luck :(

Re: More whine about locking

[Bart Oldeman]

On Mon, 25 Nov 2002, Siim Vahtre wrote:

> > So file locking works, right? I'm just not sure what I'm missing here.
>
> I tried all of those locking types. Even when I switched to DENY_ALL with
> this asm program, I was still able to read, write, delete etc the file.
> (And with 'smbstatus' I saw only "DENY_NONE" all the time.)

Hmm, so you get something else than I did?
did you?
a) use 1.1.3.7
b) only press the number, not the enter key (not leaving the program while
locking!)
c) use two local dosemu sessions?

Please don't play with Samba now: I just can't explain why we have
different results.

Bart

Re: More whine about locking

[Siim Vahtre]

> Hmm, so you get something else than I did?
> did you?
> a) use 1.1.3.7
Yes!

> b) only press the number, not the enter key (not leaving the program while
> locking!)
Yes!

> c) use two local dosemu sessions?
Yes!

> Please don't play with Samba now: I just can't explain why we have
> different results.
Ok. Pure ext3 mounted with lredir.

Re: More whine about locking

[Bart Oldeman]

On Mon, 25 Nov 2002, Siim Vahtre wrote:

> > c) use two local dosemu sessions?
> Yes!
>
> > Please don't play with Samba now: I just can't explain why we have
> > different results.
> Ok. Pure ext3 mounted with lredir.

Ok.
Try the following:

have lockdos.com and lockdos.asm in the same directory.
run lockdos
press the 1 key
switch to another window

type in Linux:

lsof | grep lockdos.asm

you should get something like this:

dosemu.bi 14725 enbeo   16uw  REG        3,7      585   1104103 /home/enbeo/dosemu/freedos/lockdos.asm

now go back to the dosemu, press 2 and lsof should give you:
dosemu.bi 14725 enbeo   16ur  REG        3,7      585   1104103 /home/enbeo/dosemu/freedos/lockdos.asm

the r and w disappear for 0 and 4; for 3 you should also get a "w".

Bart

Re: More whine about locking

[Siim Vahtre]

> you should get something like this:
>
> dosemu.bi 14725 enbeo   16uw  REG        3,7      585   1104103 /home/enbeo/dosemu/freedos/lockdos.asm
>
> now go back to the dosemu, press 2 and lsof should give you:
> dosemu.bi 14725 enbeo   16ur  REG        3,7      585   1104103 /home/enbeo/dosemu/freedos/lockdos.asm
>
> the r and w disappear for 0 and 4; for 3 you should also get a "w".

_ALL_ locking modes showed:

dosemu.bi  735 siim    7u   REG        3,2     579    473061 /home/siim/dosemu/freedos/lockdos.asm

Re: More whine about locking

[Bart Oldeman]

On Mon, 25 Nov 2002, Siim Vahtre wrote:

> > you should get something like this:
> >
> > dosemu.bi 14725 enbeo   16uw  REG        3,7      585   1104103 /home/enbeo/dosemu/freedos/lockdos.asm
> >
> > now go back to the dosemu, press 2 and lsof should give you:
> > dosemu.bi 14725 enbeo   16ur  REG        3,7      585   1104103 /home/enbeo/dosemu/freedos/lockdos.asm
> >
> > the r and w disappear for 0 and 4; for 3 you should also get a "w".
>
> _ALL_ locking modes showed:
>
> dosemu.bi  735 siim    7u   REG        3,2     579    473061 /home/siim/dosemu/freedos/lockdos.asm

Right, the only thing I can think of now that could make a difference is
the DOS kernel. I know that older FreeDOS kernels (inc. 2024c) did not
honour these locking bits. Did you try FreeDOS kernel 2027? See
http://freedos.sourceforge.net

If that still doesn't work then please send me (privately) the boot.log
from using dosemu -D+Dd, where you just enter lockdos, press 1 and exit
the emulator.

Bart

Re: More whine about locking

[Siim Vahtre]

> Right, the only thing I can think of now that could make a difference is
> the DOS kernel. I know that older FreeDOS kernels (inc. 2024c) did not
> honour these locking bits. Did you try FreeDOS kernel 2027? See
> http://freedos.sourceforge.net

Switched 2024c to 2027.

And _IT WORKS!!_

Even region locking! I mean.. whoa :-)

Thank you!!

Re: More whine about locking

[Uwe (Peter) Feldtmann]

Having same problems but am not using freedos.

Willing to give it a go though.

A complete 1.1.3 dosemu with up-to-date freedos would be a great help.  

Is there such a thing?