[Olsr-users] Howto feed routing-table into OLSRd2?

[Bastian Rosner]

Hi,

patch applied. Log after startup:

14:36:54.484 INFO(olsrv2_routing)
src-plugins/olsrv2/olsrv2/olsrv2_routing.c 935: Successfully set route
'src-ip 10.31.105.5 gw 169.254.1.2 dst 10.31.105.4 src-prefix - metric 2
table 123 protocol 100 if eth1.31 (5)'
14:37:22.682 WARN(os_routing)
src-plugins/subsystems/os_linux/os_system_linux.c 503: netlink recvmsg
error: No buffer space available (105)
f14:37:26.877 WARN(os_routing)
src-plugins/subsystems/os_linux/os_system_linux.c 503: netlink recvmsg
error: No buffer space available (105)
14:37:26.895 WARN(os_routing)
src-plugins/subsystems/os_linux/os_system_linux.c 503: netlink recvmsg
error: No buffer space available (105)
14:37:27.156 WARN(os_routing)
src-plugins/subsystems/os_linux/os_system_linux.c 503: netlink recvmsg
error: No buffer space available (105)
14:37:34.517 WARN(os_routing)
src-plugins/subsystems/os_linux/os_system_linux.c 503: netlink recvmsg
error: No buffer space available (105)

It should be noted that it takes about 30s for the "no buffer space
avail" message to appear after startup and followup messages do not seem
to have a strict timing pattern.

Cheers,
Bastian

On 06/14/2015 02:22 PM, Henning Rogge wrote:
> Hi,
> 
> can you try the following patch? It is not really a solution, I just
> want to see if it makes a difference.
> 
> diff --git a/src-plugins/subsystems/os_linux/os_system_linux.c
> b/src-plugins/subsystems/os_linux/os_system_linux.c
> index 54c0c9bfd424..79d9baec4545 100644
> --- a/src-plugins/subsystems/os_linux/os_system_linux.c
> +++ b/src-plugins/subsystems/os_linux/os_system_linux.c
> @@ -224,12 +224,12 @@ os_system_netlink_add(struct os_system_netlink
> *nl, int protocol) {
>     goto os_add_netlink_fail;
>   }
> 
> -  nl->in = calloc(1, getpagesize());
> +  nl->in = calloc(16, getpagesize());
>   if (nl->in == NULL) {
>     OONF_WARN(nl->used_by->logging, "Not enough memory for netlink
> input buffer");
>     goto os_add_netlink_fail;
>   }
> -  nl->in_len = getpagesize();
> +  nl->in_len = 16 * getpagesize();
> 
>   memset(&addr, 0, sizeof(addr));
>   addr.nl_family = AF_NETLINK;
> 
> 
> 
> Henning
> 
> On Sun, Jun 14, 2015 at 2:17 PM, Bastian Rosner <(spam-protected)> wrote:
>> On 06/14/2015 02:12 PM, Henning Rogge wrote:
>>> On Sun, Jun 14, 2015 at 2:00 PM, Bastian Rosner <(spam-protected)> wrote:
>>>> Hi,
>>>>
>>>> just to make sure that this is not related to any IPv6 settings, i
>>>> adjusted the configuration to be IPv4-only and changed to logging behavior:
>>>>
>>>> According to logs plugin lan_import loaded fine. Also inserting
>>>> neighbors route to table 123 succeeded:
>>>>
>>>> 13:48:48.293 INFO(olsrv2_routing)
>>>> src-plugins/olsrv2/olsrv2/olsrv2_routing.c 767: Set route 'src-ip - gw
>>>> 169.254.1.2 dst 10.31.105.4 src-prefix - metric 2 table 123 protocol 100
>>>> if eth1.31 (5)' (0 0 -)
>>>> 13:48:48.293 INFO(olsrv2_routing)
>>>> src-plugins/olsrv2/olsrv2/olsrv2_routing.c 935: Successfully set route
>>>> 'src-ip 10.31.105.5 gw 169.254.1.2 dst 10.31.105.4 src-prefix - metric 2
>>>> table 123 protocol 100 if eth1.31 (5)'
>>>>
>>>> Log also contains the following message:
>>>>
>>>> 13:52:29.683 WARN(os_routing)
>>>> src-plugins/subsystems/os_linux/os_system_linux.c 503: netlink recvmsg
>>>> error: No buffer space available (105)
>>>>
>>>> Do i need to run a recent version of olsrv2 on openwrt-side to accept
>>>> attached-network routes generated by ubuntu's lan_import?
>>>
>>> No, there is no change needed on the receiver side...
>>>
>>> We just hit a bottleneck in the netlink code. And I used a full
>>> pagesize of memory for the netlink buffer!
>>>
>>> Just to be sure, how many routes are you trying to import?
>>
>> Not that many i guess:
>> # ip -4 r s table 100 |wc -l
>> 846
>> # ip -6 r s table 100 |wc -l
>> 586
>>
>>
>>
>> --
>> Olsr-users mailing list
>> (spam-protected)
>> https://lists.olsr.org/mailman/listinfo/olsr-users