[9fans] p9_errstr2errno unknown mode

[9fans] p9_errstr2errno unknown mode

[Matthias Teege]

Moin,

I've mounted my Plan 9 fileserver via 9p from a linuxbox (2.6.23). I can
create new files without problems. If I try to copy a file to the Plan
9 fileserver I got:

p9_errstr2errno: errstr :unknown mode: not found
p9_errstr2errno: errstr :unknown mode: not found

How can I fix this?
Matthias

Re: [9fans] p9_errstr2errno unknown mode

[Eric Van Hensbergen]

On Sun, Apr 6, 2008 at 3:47 AM, Matthias Teege <matthias-9fs@mteege.de> wrote:
> Moin,
>
>  I've mounted my Plan 9 fileserver via 9p from a linuxbox (2.6.23). I can
>  create new files without problems. If I try to copy a file to the Plan
>  9 fileserver I got:
>
>  p9_errstr2errno: errstr :unknown mode: not found
>  p9_errstr2errno: errstr :unknown mode: not found
>

It must be doing something in the twstat that isn't correct, can you
send me a 9p trace (either from the client by enabling debug
(debug=0xffff during mount) or the server.

Does it happen for all files, or just certain files?

          -eric

Re: [9fans] p9_errstr2errno unknown mode

[Matthias Teege]

> It must be doing something in the twstat that isn't correct, can you
> send me a 9p trace (either from the client by enabling debug
> (debug=0xffff during mount) or the server.

sudo /bin/mount -t 9p -o uid=1000,gid=1000,user,uname=xom,proto=unix,noextend,noauto,debug=0xffff /tmp/ns.m/rn /n/rn
doesn't give me any output in /var/log/messages

I've made a tcpdump [1].

> Does it happen for all files, or just certain files?

I don't found a file that works.

Many thanks
Matthias

http://mteege.de/2008/04/p9.dmp

Re: [9fans] p9_errstr2errno unknown mode

[ron minnich]

Unless this file got truncated, all I see here are walks and stats and
clunks of a file, nothing more (I used wireshark to walk the file --
it breaks out 9p pretty nicely). I don't see any twstat or open or
create ... Am I missing something?

ron

Re: [9fans] p9_errstr2errno unknown mode

[ron minnich]

btw, this 'unkown mode' -- what is all this you wonder?
what's
p9_errstr2errno: errstr :unknown mode: not found

Not found? Huh? This is the errstr (from plan 9) to errno (for
ancient, primitive OSes that don't have errstr, i.e. 'all of them').

I see in fossil/9p.c this for create:
	if(omode == OREAD || omode == ORDWR || omode == OEXEC)
		open |= FidORead;
	if(omode == OWRITE || omode == ORDWR)
		open |= FidOWrite;
	if((open & (FidOWrite|FidORead)) == 0){
		vtSetError("unknown mode");
		goto error;
	}

Or this for open:
	if((open & (FidOWrite|FidORead)) == 0){
		vtSetError("unknown mode");
		goto error;
	}

So, seems linux client is sending bad omode?

we sure could use that trace.

ron

Re: [9fans] p9_errstr2errno unknown mode

[Matthias Teege]

> Unless this file got truncated, all I see here are walks and stats and

The file isn't truncated.

> clunks of a file, nothing more (I used wireshark to walk the file --
> it breaks out 9p pretty nicely). I don't see any twstat or open or
> create ... Am I missing something?

I made a second dump [1] but I don't see any twstat in wireshark to. The
dump is for the following commands:

; cp /n/crn/usr/mtg/testmail.txt /tmp
; cp /tmp/testmail.txt /n/crn/usr/mtg/testmail2.txt

Reading isn't a problem. Is it possible that the error is generated
before anything hitting the network?

Matthias

http://mteege.de/2008/04/p92.dmp

Re: [9fans] p9_errstr2errno unknown mode

[ron minnich]

On Sun, Apr 6, 2008 at 11:57 PM, Matthias Teege <matthias-9fs@mteege.de> wrote:

>  ; cp /n/crn/usr/mtg/testmail.txt /tmp
>  ; cp /tmp/testmail.txt /n/crn/usr/mtg/testmail2.txt

I'm more confused. You get the same error for each of these?

to sum up:

these are running on linux. First is copy from remote plan 9 system to
local /tmp.
second is copy from local /tmp to remote plan 9 server. Is that it?

what's dmesg show?

ron

Re: [9fans] p9_errstr2errno unknown mode

[ron minnich]

On Sun, Apr 6, 2008 at 11:57 PM, Matthias Teege <matthias-9fs@mteege.de> wrote:

>
>  ; cp /n/crn/usr/mtg/testmail.txt /tmp
>  ; cp /tmp/testmail.txt /n/crn/usr/mtg/testmail2.txt

sorry, being dumb, time to go to bed. So the trace clearly shows the
first one succeeding.

There's never any sign that the second command even happens. How are
you capturing this data? I don't see any bits from the second command.

Oh well, off to bed, I'll read your answer tomorrow :-)

ron

Re: [9fans] p9_errstr2errno unknown mode

[Matthias Teege]

> There's never any sign that the second command even happens. How are
> you capturing this data? I don't see any bits from the second command.

tcpdump -n -w /tmp/p93.dmp -s 0 -i eth0 port not 22

As root I can create a file but cant copy a file to the Plan 9 fileserver.

% whoami
matthias
% cd /n/crn/usr/mtg/
% touch hello
touch: cannot touch `hello': Permission denied
% cp /home/matthias/notes.txt ./
cp: cannot create regular file `./notes.txt': Permission denied
% sudo su -
# cd /n/crn/usr/mtg
# touch hello
# echo Hello >> hello
# cat hello
Hello
# cp /root/scan.txt ./
cp: cannot create regular file „./scan.txt“ : Permission denied

There is only one TCreate and RError in the dump [1]. Its a little strange.

Matthias

http://mteege.de/2008/04/p93.dmp

Re: [9fans] p9_errstr2errno unknown mode

[Eric Van Hensbergen]

I think Ron is on the right track, it sounds like a bug in the
Create/Open code which doesn't do the right thing with respect to
extended/legacy mode.  I'll try to look at it in depth today.

           -eric


On Mon, Apr 7, 2008 at 8:18 AM, Matthias Teege <matthias-9fs@mteege.de> wrote:
> > There's never any sign that the second command even happens. How are
>  > you capturing this data? I don't see any bits from the second command.
>
>  tcpdump -n -w /tmp/p93.dmp -s 0 -i eth0 port not 22
>
>  As root I can create a file but cant copy a file to the Plan 9 fileserver.
>
>  % whoami
>  matthias
>  % cd /n/crn/usr/mtg/
>  % touch hello
>  touch: cannot touch `hello': Permission denied
>  % cp /home/matthias/notes.txt ./
>  cp: cannot create regular file `./notes.txt': Permission denied
>  % sudo su -
>  # cd /n/crn/usr/mtg
>  # touch hello
>  # echo Hello >> hello
>  # cat hello
>  Hello
>  # cp /root/scan.txt ./
>  cp: cannot create regular file „./scan.txt" : Permission denied
>
>  There is only one TCreate and RError in the dump [1]. Its a little strange.
>
>  Matthias
>
>  http://mteege.de/2008/04/p93.dmp
>
>
>