Re: [vpp-dev]: Assert in vnet_mpls_tunnel_del()

Neale Ranns Tue, 14 Sep 2021 04:57:40 -0700

Hi Rajiyh,

Maybe there’s something that still resolves through the tunnel when it’s 
deleted?


/neale

From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> on behalf of Rajith PR via 
lists.fd.io <rajith=rtbrick....@lists.fd.io>
Date: Tuesday, 14 September 2021 at 13:17
To: vpp-dev <vpp-dev@lists.fd.io>
Subject: [vpp-dev]: Assert in vnet_mpls_tunnel_del()
Hi All,

We recently started using the VPP's mpls tunnel constructs for our L2 cross 
connect application. In certain test scenarios we are seeing a crash in the 
delete path of the mpls tunnel.
Any pointers to fix the issue would be really helpful.

Version: 20.09
Call Stack:

Thread 1 (Thread 0x7f854cdd3400 (LWP 14261)):

#0  0x00007f854c41b492 in __GI___waitpid (pid=21116, 
stat_loc=stat_loc@entry=0x7f84f79abc28, options=options@entry=0) at 
../sysdeps/unix/sysv/linux/waitpid.c:30

#1  0x00007f854c386177 in do_system (line=<optimized out>) at 
../sysdeps/posix/system.c:149

#2  0x00007f854c96918d in bd_signal_handler_cb () from 
/usr/local/lib/libbd-infra.so

#3  0x00007f853db8953f in rtb_bd_signal_handler () from 
/usr/local/lib/libvlib.so.1.0.1

#4  0x00007f853db899a2 in unix_signal_handler () from 
/usr/local/lib/libvlib.so.1.0.1

#5  <signal handler called>

#6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51

#7  0x00007f854c377921 in __GI_abort () at abort.c:79

#8  0x00007f853f58a9e3 in os_panic () from /usr/local/lib/librtbvpp.so

#9  0x00007f853d35aaa9 in ?? () from /usr/local/lib/libvppinfra.so.1.0.1

#10 0x00007f853d35a827 in _clib_error () from 
/usr/local/lib/libvppinfra.so.1.0.1

#11 0x00007f853ecb2d75 in ?? () from /usr/local/lib/libvnet.so.1.0.1

#12 0x00007f853ecb302d in fib_path_list_get_n_paths () from 
/usr/local/lib/libvnet.so.1.0.1

#13 0x00007f853e8f0b5c in ?? () from /usr/local/lib/libvnet.so.1.0.1

#14 0x00007f853e8ef942 in ?? () from /usr/local/lib/libvnet.so.1.0.1

#15 0x00007f853e8ed51a in ?? () from /usr/local/lib/libvnet.so.1.0.1

#16 0x00007f853e2e9e1a in ?? () from /usr/local/lib/libvnet.so.1.0.1

#17 0x00007f853e2ea0e8 in vnet_sw_interface_set_flags () from 
/usr/local/lib/libvnet.so.1.0.1

#18 0x00007f853e2eb6e4 in vnet_delete_sw_interface () from 
/usr/local/lib/libvnet.so.1.0.1

#19 0x00007f853e2eede9 in vnet_delete_hw_interface () from 
/usr/local/lib/libvnet.so.1.0.1

#20 0x00007f853e8ee368 in vnet_mpls_tunnel_del () from 
/usr/local/lib/libvnet.so.1.0.1

#21 0x00007f853f74535a in rtb_vpp_l2_xconnect_route_del_handle () from 
/usr/local/lib/librtbvpp.so

#22 0x00007f853f7453fa in rtb_vpp_l2_xconnect_route_handle () from 
/usr/local/lib/librtbvpp.so

#23 0x00007f853f69551b in rtb_vpp_route_mapping_process () from 
/usr/local/lib/librtbvpp.so

#24 0x00007f853f696a67 in rtb_vpp_route_adjacency_handle () from 
/usr/local/lib/librtbvpp.so

#25 0x00007f853f696d22 in rtb_vpp_route_api_out_process () from 
/usr/local/lib/librtbvpp.so

#26 0x00007f85406b3975 in fib_route_api_out_del () from 
/usr/local/lib/libfibd.so

#27 0x00007f85406b3a83 in fib_route_api_out_tbl_vpp_wlk () from 
/usr/local/lib/libfibd.so

#28 0x00007f85406a550b in fib_job_tmr_cb () from /usr/local/lib/libfibd.so

#29 0x00007f854b27e6c2 in bds_qrunner_dispatch () from /usr/local/lib/libbds.so

#30 0x00007f854b27f77c in bds_qrunner_dispatch_type () from 
/usr/local/lib/libbds.so

#31 0x00007f854b27f9aa in bds_qrunner_dispatch_prepare () from 
/usr/local/lib/libbds.so

#32 0x00007f854b27faa8 in bds_qrunner_expire () from /usr/local/lib/libbds.so

#33 0x00007f854a67f616 in ?? () from /usr/local/lib/libqb.so

#34 0x00007f854a67cfa7 in ?? () from /usr/local/lib/libqb.so

#35 0x00007f854a67d797 in qb_loop_run_vpp_wrapper () from 
/usr/local/lib/libqb.so

#36 0x00007f854a6890e8 in lib_qb_service_start_event_wrapper_loop () from 
/usr/local/lib/libqb.so

#37 0x00007f854c96b262 in bd_event_loop_run_once () from 
/usr/local/lib/libbd-infra.so

#38 0x00007f85060444f8 in ?? () from 
/usr/local/lib/vpp_plugins/rtbrick_plugin.so

#39 0x00007f853db058dd in ?? () from /usr/local/lib/libvlib.so.1.0.1

#40 0x00007f853d37ec34 in clib_calljmp () from 
/usr/local/lib/libvppinfra.so.1.0.1

#41 0x00007f85255f7a10 in ?? ()

#42 0x00007f853db0531f in ?? () from /usr/local/lib/libvlib.so.1.0.1
Code Snippet for Creating Tunnel (rpath has the out-labels and  nexthop):

          vec_add1(rpaths, rpath);
          tunnel_sw_if_index = vnet_mpls_tunnel_create(1, 0, NULL);
          vnet_mpls_tunnel_path_add(tunnel_sw_if_index, rpaths);
          vnet_sw_interface_admin_up(vnm, tunnel_sw_if_index);

Code Snippet for Deleting Tunnel.


         vec_add1(rpaths, rpath);
         vnet_mpls_tunnel_path_remove(sw_if_index, rpaths);
         vec_free(rpaths);
         vnet_mpls_tunnel_del(sw_if_index);

Thanks,
Rajith


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Re: [vpp-dev]: Assert in vnet_mpls_tunnel_del()

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