ethswctld runtime error with openvswitch 2.7.90 on debian stretch

[rburkholder]

I was hoping I could build and run the example and see some results. But, sigh, no.

Being totally new to the code, I am unfamiliar with the threads and messages.

Might there be someone experienced be able to quickly provide an indication of the issue?

(gdb) info source
Current source file is ../../../../src/rofl/common/crofconn.cc
Compilation directory is /home/vagrant/rofl-common/build/src/rofl/common
Located in /home/vagrant/rofl-common/src/rofl/common/crofconn.cc
Contains 1973 lines.
Source language is c++.
Producer is GNU C++11 6.3.0 20170425 -mtune=generic -march=x86-64 -g -g -O2 -O0 -std=c++11 -fno-inline -fPIC.
Compiled with DWARF 2 debugging format.

gdb) r
Starting program: /home/vagrant/rofl-common/build/examples/ethswctld/ethswctld
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff5bde700 (LWP 27149)]
[New Thread 0x7ffff53dd700 (LWP 27150)]
[New Thread 0x7ffff4bdc700 (LWP 27151)]
[New Thread 0x7fffeffff700 (LWP 27152)]
[New Thread 0x7fffef7fe700 (LWP 27153)]
[New Thread 0x7fffeeffd700 (LWP 27155)]
[cetherswitch] datapath attached, dptid: 0
[cetherswitch] caught some exception, use debugger for getting more info
<cofmsg version: 4 type: 10 length: 84(wire: 84) xid: 0x0 >
<cofmsg_packet_in >
<buffer-id:-1 >
<total-len:42 >
<reason:no match  >
<table-id: 0 >
<cookie: 0x0 >
<cofmatch ofp-version:4 >
<type: 1 >
<coxmatches #matches:1 >
<id: 0x80000000 >
<coxmatch oxm_id: 0x80000004 class: 0x8000 field: 0x0 hasmask: 0 length: 4>
<in-port: 0x1 >
<cpacket data:0x7fffe8001160 datalen:42 head:64 tail:256>
0000: ff ff ff ff ff ff 7e 7a   dd f9 85 02 08 06 00 01   08 00 06 04 00 01 7e 7a   dd f9 85 02 0a 00 00 01
0001: 00 00 00 00 00 00 0a 00   00 02
ethswctld: ../../../examples/ethswctld/cetherswitch.cc:285: virtual void rofl::examples::ethswctld::cetherswitch::handle_packet_in(rofl::crofdpt&, const rofl::cauxid&, rofl::openflow::cofmsg_packet_in&): Assertion `0' failed.

Thread 6 "crofconn" received signal SIGABRT, Aborted.
[Switching to Thread 0x7fffef7fe700 (LWP 27153)]
__GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
51	../sysdeps/unix/sysv/linux/raise.c: No such file or directory.

(gdb) info stack
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#1  0x00007ffff647e3fa in __GI_abort () at abort.c:89
#2  0x00007ffff6475e37 in __assert_fail_base (fmt=<optimized out>, assertion=assertion@entry=0x55555575f194 "0",
    file=file@entry=0x55555575f168 "../../../examples/ethswctld/cetherswitch.cc", line=line@entry=285,
    function=function@entry=0x55555575f2a0 <rofl::examples::ethswctld::cetherswitch::handle_packet_in(rofl::crofdpt&, rofl::cauxid const&, rofl::openflow::cofmsg_packet_in&)::__PRETTY_FUNCTION__> "virtual void rofl::examples::ethswctld::cetherswitch::handle_packet_in(rofl::crofdpt&, const rofl::cauxid&, rofl::openflow::cofmsg_packet_in&)") at assert.c:92
#3  0x00007ffff6475ee2 in __GI___assert_fail (assertion=0x55555575f194 "0", file=0x55555575f168 "../../../examples/ethswctld/cetherswitch.cc", line=285,
    function=0x55555575f2a0 <rofl::examples::ethswctld::cetherswitch::handle_packet_in(rofl::crofdpt&, rofl::cauxid const&, rofl::openflow::cofmsg_packet_in&)::__PRETTY_FUNCTION__> "virtual void rofl::examples::ethswctld::cetherswitch::handle_packet_in(rofl::crofdpt&, const rofl::cauxid&, rofl::openflow::cofmsg_packet_in&)")
    at assert.c:101
#4  0x00005555555813ec in rofl::examples::ethswctld::cetherswitch::handle_packet_in (this=0x7fffffffdba0, dpt=..., auxid=..., msg=...)
    at ../../../examples/ethswctld/cetherswitch.cc:285
#5  0x00005555556964f8 in rofl::crofdpt::packet_in_rcvd (this=0x7fffe8000ad0, auxid=..., msg=0x7fffe80014e0) at ../../../../src/rofl/common/crofdpt.cc:690
#6  0x00005555556944a9 in rofl::crofdpt::handle_recv (this=0x7fffe8000ad0, chan=..., conn=..., msg=0x7fffe80014e0) at ../../../../src/rofl/common/crofdpt.cc:121
#7  0x0000555555690a9c in rofl::crofchan::handle_recv (this=0x7fffe8000ae8, conn=..., msg=0x7fffe80014e0)
    at /home/vagrant/rofl-common/build/../src/rofl/common/crofchan.h:525
#8  0x0000555555627cd3 in rofl::crofconn::handle_rx_messages (this=0x7ffff0000970) at ../../../../src/rofl/common/crofconn.cc:1227
#9  0x00005555556277f0 in rofl::crofconn::handle_wakeup (this=0x7ffff0000970, thread=...) at ../../../../src/rofl/common/crofconn.cc:1168
#10 0x00005555556c7cb9 in rofl::cthread::run_loop (this=0x7ffff0000988) at ../../../../src/rofl/common/cthread.cpp:459
#11 0x00005555556c84c6 in rofl::cthread::start_loop (arg=0x7ffff0000988) at ../../../../src/rofl/common/cthread.hpp:210
#12 0x00007ffff79bb494 in start_thread (arg=0x7fffef7fe700) at pthread_create.c:333
#13 0x00007ffff653293f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

[rburkholder]

I did a step and found out where it is happening:

(gdb)
rofl::openflow::coxmatches::get_ofb_eth_src (this=0x7fffe80015d8) at /home/vagrant/rofl-common/build/../src/rofl/common/openflow/coxmatches.h:494
494	      throw eOxmInval("coxmatches::get_ofb_eth_src() not found");
(gdb)


rofl::openflow::eOxmInval::eOxmInval (this=0x7fffe0000a90, __arg="coxmatches::get_ofb_eth_src() not found")
    at /home/vagrant/rofl-common/build/../src/rofl/common/openflow/coxmatch.h:38
38	  eOxmInval(const std::string &__arg) : eOxmBase(__arg){};
(gdb)
rofl::openflow::eOxmBase::eOxmBase (this=0x7fffe0000a90, __arg="coxmatches::get_ofb_eth_src() not found")
    at /home/vagrant/rofl-common/build/../src/rofl/common/openflow/coxmatch.h:34
34	  eOxmBase(const std::string &__arg) : exception(__arg){};
(gdb)
rofl::exception::exception (this=0x7fffe0000a90, __arg="coxmatches::get_ofb_eth_src() not found") at /home/vagrant/rofl-common/build/../src/rofl/common/exception.hpp:29
29	  exception(const std::string &__arg) : std::runtime_error(__arg){};
(gdb)

Now to figure out what it means.

[toanju]

It seems OVS has another spec violation here. Using OF 1.3 a datapath should set these fields.