Re: [mpls-linux-general] Multiple pushes again
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Re: [mpls-linux-general] Multiple pushes again
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From: James R. L. <jl...@mi...> - 2002-02-26 16:34:40
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Hello,
Turn on MPLS kernel debugging in the UML (mplsadm2 -d), duplicate, then
sent me the output.
Jim
On Mon, Feb 25, 2002 at 12:15:58PM +0000, Radu Dragos wrote:
> Hi all.
> I'm trying to push 2 labels into the MPLS stack.
>
> Begin (Scenario):
> linux-2.4.17
> mpls-linux-1.128
>
> ------ _____
> |Host|---------------------------UML1|
> ------ -----
> tap0 eth0
> 192.168.100.1 192.168.100.2
>
>
> On host:
> #./mplsadm2 -v -A -O gen:16:tap0:ipv4:192.168.100.2
> #./mplsadm2 -v -O key:0x3 -o
> push:gen:16:push:gen:17:set:tap0:ipv4:192.168.100.2
> #iptables -A OUTPUT -d 192.168.100.2 -j MPLS --set-key 0x3
> #./mplsadm -L tap0:0
>
> #watch cat /proc/net/mpls*
> lo 0 109
> tap0 0 7
> 0x00000003 4/336/0 1 PUSH(gen 16) PUSH(gen 17) SET(tap0,192.168.100.2)
>
> ############################################################
> On UML1:
> ./mplsadm2 -A -I gen:17:0 -i pop:peek
> ./mplsadm2 -A -I gen:16:0
> ./mplsadm -L eth0:0
>
> #watch cat /proc/net/mpls*
> 0x40004000 0/0/0 gen 16 0 1 POP PEEK
> 0x40004400 0/0/0 gen 17 0 1 POP PEEK
> lo 0 5
> tap0 0 1
> eth0 0 5
>
> End(Scenario)
>
> On host:
> ping 192.168.100.2
> PING 192.168.100.2 (192.168.100.2) from 192.168.100.1 : 56(84) bytes of
> data.
> 64 bytes from 192.168.100.2: icmp_seq=0 ttl=255 time=3.916 msec
> The host received only 1 replay.
>
> On UML1:
> Kernel panic.
>
> bt from gdb:
> #0 panic (fmt=0xa0140e2c "Segfault with no mm") at panic.c:52
> #1 0xa00c67a1 in segv (address=276, ip=2685111923, is_write=0, is_user=0)
> at trap_kern.c:42
> #2 0xa00c7548 in segv_handler (sig=11, sc=0xa015f798, usermode=0)
> at trap_user.c:370
> #3 0xa00c76bf in sig_handler (sig=11, sc=
> {gs = 0, __gsh = 0, fs = 0, __fsh = 0, es = 43, __esh = 0, ds = 43,
> __dsh = 0, edi = 2720948257, esi = 2720948253, ebp = 2685794980, esp =
> 2685794924, ebx = 2693715584, edx = 272, ecx = 2685794652, eax = 38,
> trapno = 14, err = 4, eip = 2685111923, cs = 35, __csh = 0, eflags =
> 66182, esp_at_signal = 2685794924, ss = 43, __ssh = 0, fpstate = 0x0,
> oldmask = 0, cr2 = 276}) at trap_user.c:429
> #4 <signal handler called>
> #5 0xa00b8e73 in mpls_opcode_push (skb=0xa015fafc, ml=0x110,
> mpr=0xa0973340)
> at mpls_opcode.c:138
> #6 0xa00b7e3c in mpls_input (skb=0xa08ed680, dev=0xa08f9800,
> pt=0xa016a040,
> label=0xa23c41e0, mpr=0xa0973340, labelspace=0) at mpls_input.c:190
> #7 0xa00b8584 in mpls_rcv (skb=0xa08ed680, dev=0xa08f9800, pt=0xa016a040)
> at mpls_input.c:515
> #8 0xa0074f45 in net_rx_action (h=0xa017d350) at dev.c:1530
> #9 0xa001238a in do_softirq () at softirq.c:90
> #10 0xa00c3385 in do_IRQ (irq=4, user_mode=0) at irq.c:332
> #11 0xa00c39af in sigio_handler (sig=29, sc=0xa015fc80, usermode=0)
> at irq_user.c:62
> ---Type <return> to continue, or q <return> to quit---
> #12 0xa00c75de in irq_handler (sig=29, sc=
> {gs = 0, __gsh = 0, fs = 0, __fsh = 0, es = 43, __esh = 0, ds = 43,
> __dsh = 0, edi = 10, esi = 2685796348, ebp = 2685796208, esp = 2685796180,
> ebx = 2685796200, edx = 8192, ecx = 2685796200, eax = 4294967292, trapno =
> 1, err = 0, eip = 2685302417, cs = 35, __csh = 0, eflags = 646,
> esp_at_signal = 2685796180, ss = 43, __ssh = 0, fpstate = 0xa015fcd8,
> oldmask = 0, cr2 = 0}) at trap_user.c:405
> #13 <signal handler called>
> #14 0xa00e7691 in __libc_nanosleep ()
> #15 0xa00c60dd in idle_sleep (secs=10) at time.c:108
> #16 0xa00c92a0 in do_idle () at process_kern.c:418
> #17 0xa00c934d in cpu_idle () at process_kern.c:445
> #18 0xa00036f1 in start_kernel () at init/main.c:623
> #19 0xa00c7acd in start_kernel_proc (unused=0x0) at um_arch.c:131
> #20 0xa00c6fea in signal_tramp (arg=0xa00c7a98) at trap_user.c:84
>
>
> Does anyone has an updated version of README.hierarchy
> or an working example with multiple pushes/pops ??
>
> Thanks in advance,
> Radu.
>
>
>
>
>
>
>
> _______________________________________________
> mpls-linux-general mailing list
> mpl...@li...
> https://lists.sourceforge.net/lists/listinfo/mpls-linux-general
--
James R. Leu
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