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Message-ID: <3f7e8d1b-e020-9cb1-1e3b-c039ad6d4a0b@free.fr>
Date: Mon, 1 Aug 2022 12:43:53 +0200
From: Bernard f6bvp <f6bvp@...e.fr>
To: Francois Romieu <romieu@...zoreil.com>
Cc: Eric Dumazet <edumazet@...gle.com>, linux-hams@...r.kernel.org,
Thomas Osterried DL9SAU <thomas@...erg.in-berlin.de>,
netdev@...r.kernel.org
Subject: Re: rose timer t error displayed in /proc/net/rose
I used concurrently ~/ax25tools/user_call/rose_call in order to perform
a connect request to my local node :
./rose_call rose0 f6bvp f6bvp-4 2080175524
Looking again at /proc/net/rose it seems that rose->timer is not stopped
immediately when 0 value is reached and counts down result to an
underflow (long -1 value).
After a few more clock tics rose->timer is reinitialized to 180 and rose
state st changes from 1 to 2.
dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode
2080175524 WP-0 2080175524 NODE-0 rose0 001 00001 1 0 0 0 6 200 180 180 5 0/000 0 0 77873
2080175524 F6BVP-4 2080175524 F6BVP-0 rose0 002 00001 2 0 0 0 147 200 180 180 5 0/000 0 0 76283
* * 2080175524 ROUTE-0 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 35195
* * 2080175524 F6BVP-15 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 35194
* * 2080175524 WP-0 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 36456
bernard@...ntu-f6bvp:~$ cat /proc/net/rose
dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode
2080175524 WP-0 2080175524 NODE-0 rose0 001 00001 1 0 0 0 73786976294838200 200 180 180 5 0/000 0 0 77873
2080175524 F6BVP-4 2080175524 F6BVP-0 rose0 002 00001 2 0 0 0 135 200 180 180 5 0/000 0 0 76283
* * 2080175524 ROUTE-0 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 35195
* * 2080175524 F6BVP-15 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 35194
* * 2080175524 WP-0 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 36456
bernard@...ntu-f6bvp:~$ cat /proc/net/rose
dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode
2080175524 WP-0 2080175524 NODE-0 rose0 001 00001 1 0 0 0 73786976294838195 200 180 180 5 0/000 0 0 77873
2080175524 F6BVP-4 2080175524 F6BVP-0 rose0 002 00001 2 0 0 0 131 200 180 180 5 0/000 0 0 76283
* * 2080175524 ROUTE-0 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 35195
* * 2080175524 F6BVP-15 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 35194
* * 2080175524 WP-0 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 36456
bernard@...ntu-f6bvp:~$ cat /proc/net/rose
dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode
2080175524 WP-0 2080175524 NODE-0 rose0 001 00001 2 0 0 0 178 200 180 180 5 0/000 0 0 77873
2080175524 F6BVP-4 2080175524 F6BVP-0 rose0 002 00001 2 0 0 0 129 200 180 180 5 0/000 0 0 76283
* * 2080175524 ROUTE-0 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 35195
* * 2080175524 F6BVP-15 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 35194
* * 2080175524 WP-0 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 36456
At the end of state st 2 count down rose->timer is correctly stopped
while displaying 0
and rose client applications time out.
dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode
2080175524 WP-0 2080175524 NODE-0 rose0 001 00001 2 0 0 0 2 200 180 180 5 0/000 0 0 77873
* * 2080175524 ROUTE-0 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 35195
* * 2080175524 F6BVP-15 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 35194
* * 2080175524 WP-0 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 36456
bernard@...ntu-f6bvp:~$ cat /proc/net/rose
dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode
2080175524 WP-0 2080175524 NODE-0 rose0 001 00001 2 0 0 0 1 200 180 180 5 0/000 0 0 77873
* * 2080175524 ROUTE-0 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 35195
* * 2080175524 F6BVP-15 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 35194
* * 2080175524 WP-0 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 36456
bernard@...ntu-f6bvp:~$ cat /proc/net/rose
dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode
2080175524 WP-0 2080175524 NODE-0 rose0 001 00001 2 0 0 0 0 200 180 180 5 0/000 0 0 77873
* * 2080175524 ROUTE-0 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 35195
* * 2080175524 F6BVP-15 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 35194
* * 2080175524 WP-0 rose0 000 00000 0 0 0 0 0 200 180 180 5 0/000 0 0 36456
Le 01/08/2022 à 02:39, Francois Romieu a écrit :
> Bernard f6bvp <f6bvp@...e.fr> :
>> Rose proc timer t error
>>
>> Timer t is decremented one by one during normal operations.
>>
>> When decreasing from 1 to 0 it displays a very large number until next clock
>> tic as demonstrated below.
>>
>> t1, t2 and t3 are correctly handled.
> "t" is ax25_display_timer(&rose->timer) / HZ whereas "tX" are rose->tX / HZ.
>
> ax25_display_timer() does not like jiffies > timer->expires (and it should
> probably return plain seconds btw).
>
> You may try the hack below.
>
> diff --git a/net/ax25/ax25_timer.c b/net/ax25/ax25_timer.c
> index 85865ebfdfa2..b77433fff0c9 100644
> --- a/net/ax25/ax25_timer.c
> +++ b/net/ax25/ax25_timer.c
> @@ -108,10 +108,9 @@ int ax25_t1timer_running(ax25_cb *ax25)
>
> unsigned long ax25_display_timer(struct timer_list *timer)
> {
> - if (!timer_pending(timer))
> - return 0;
> + long delta = timer->expires - jiffies;
>
> - return timer->expires - jiffies;
> + return jiffies_delta_to_clock_t(delta) * HZ;
> }
>
> EXPORT_SYMBOL(ax25_display_timer);
--
73 de Bernard f6bvp / ai7bg
http://radiotelescope-lavillette.fr/au-jour-le-jour/
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