tcp socket missing from /proc/net/tcp

tcp socket missing from /proc/net/tcp

[James H. Cloos Jr.]

I'm currently at 2.6 as of cset:

 tmolina@cablespeed.com|ChangeSet|20030809164017|32866

(the last one on 2003/Aug/09)

I've currently got an open ssh session to a remote box that does not
show up in /proc/net/tcp (I also checked /proc/net/tcp6 even though
the remote box doesn't do v6; it is not there either).

One possible issue is that I did an 'ifconfig sit1 down' and an
'ifconfig sit1 up' while the ssh session was up (for an unrelated
reason).  

Hmmm.  I just opened another ssh to that same box and now both show
up again in /proc/net/tcp.

v6 is copiled in, firewall stuff is a mix on in and modules.

-JimC

Re: tcp socket missing from /proc/net/tcp

[David S. Miller]

On 23 Aug 2003 15:49:16 -0400
"James H. Cloos Jr." <cloos@jhcloos.com> wrote:

> I've currently got an open ssh session to a remote box that does not
> show up in /proc/net/tcp (I also checked /proc/net/tcp6 even though
> the remote box doesn't do v6; it is not there either).

Not surprising, nothing seems to be initializing
net/ipv6/tcp_ipv6.c:tcp6_seq_fops

I'd welcome patches to fix this.

Re: tcp socket missing from /proc/net/tcp

[YOSHIFUJI Hideaki / 吉藤英明]

In article <20030823172710.478f30f9.davem@redhat.com> (at Sat, 23 Aug 2003 17:27:10 -0700), "David S. Miller" <davem@redhat.com> says:

> On 23 Aug 2003 15:49:16 -0400
> "James H. Cloos Jr." <cloos@jhcloos.com> wrote:
> 
> > I've currently got an open ssh session to a remote box that does not
> > show up in /proc/net/tcp (I also checked /proc/net/tcp6 even though
> > the remote box doesn't do v6; it is not there either).
> 
> Not surprising, nothing seems to be initializing
> net/ipv6/tcp_ipv6.c:tcp6_seq_fops

net/ipv4/tcp_ipv4.c:tcp_proc_register() called by tcp6_proc_init() does this.
Or, do I miss something?

-- 
Hideaki YOSHIFUJI @ USAGI Project <yoshfuji@linux-ipv6.org>
GPG FP: 9022 65EB 1ECF 3AD1 0BDF  80D8 4807 F894 E062 0EEA

Re: tcp socket missing from /proc/net/tcp

[David S. Miller]

On Sun, 24 Aug 2003 10:07:53 +0900 (JST)
YOSHIFUJI Hideaki / _$B5HF#1QL@ <yoshfuji@linux-ipv6.org> wrote:

> net/ipv4/tcp_ipv4.c:tcp_proc_register() called by tcp6_proc_init() does this.
> Or, do I miss something?

You're right, I missed that.

Re: tcp socket missing from /proc/net/tcp

[James H. Cloos Jr.]

A further update:

The socket does not need to be open when sit1 is taked down; I've a
rsync now that is showing the same symptom, but was started well
after a 'ifconfig sit1 down'.

After an ssh occured and closed, the rsync started showing up.

Perhaps there is an off-by-one error?

-JimC