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[doc] backup-redmine/2019-10-12, master: doc: open-mesh/Emulation_Debug (d3aa81b)
by postmaster＠open-mesh.org 13 Oct '19

13 Oct '19

Repository : ssh://git@open-mesh.org/doc On branches: backup-redmine/2019-10-12,master >--------------------------------------------------------------- commit d3aa81b19f677e8a93a48e62684d7353673279a6 Author: Sven Eckelmann <sven(a)narfation.org> Date: Sat Oct 12 12:32:44 2019 +0000 doc: open-mesh/Emulation_Debug >--------------------------------------------------------------- d3aa81b19f677e8a93a48e62684d7353673279a6 open-mesh/Emulation_Debug.textile | 41 +++++++++++++++++++++------------------ 1 file changed, 22 insertions(+), 19 deletions(-) diff --git a/open-mesh/Emulation_Debug.textile b/open-mesh/Emulation_Debug.textile index 2467a22..e6f4acb 100644 --- a/open-mesh/Emulation_Debug.textile +++ b/open-mesh/Emulation_Debug.textile @@ -24,11 +24,11 @@ EOF' sudo sh -c 'cat > debian/etc/rc.local << "EOF" #!/bin/sh -e -MAC_PART="$(ip link show enp0s3 | awk "/ether/ {print \$2}"| sed -e "s/.*://" -e "s/[\\n\\ ].*//"|awk "{print (\"0x\"\$1)*1 }")" +MAC_PART="$(ip link show enp0s1 | awk "/ether/ {print \$2}"| sed -e "s/.*://" -e "s/[\\n\\ ].*//"|awk "{print (\"0x\"\$1)*1 }")" IP_PART="$(echo $MAC_PART|awk "{ print \$1+50 }")" NODE_NR="$(echo $MAC_PART|awk "{ printf(\"%02d\", \$1) }")" -ip addr add 192.168.2.${IP_PART}/24 dev enp0s3 -ip link set up dev enp0s3 +ip addr add 192.168.251.${IP_PART}/24 dev enp0s1 +ip link set up dev enp0s1 hostname "node"$NODE_NR ip link set up dev lo [ ! -x /host/test-init.sh ] || /host/test-init.sh @@ -278,8 +278,7 @@ The @ETH@ in hub.sh has to be changed to the real interface which provides inter cat > hub.sh << "EOF" #! /bin/sh USER="$(whoami)" -BRIDGE=br0 -ETH=enp8s0 +BRIDGE=br-qemu sudo ip link add "${BRIDGE}" type bridge for i in `seq 1 5`; do @@ -289,10 +288,7 @@ for i in `seq 1 5`; do done sudo ip link set "${BRIDGE}" up - -sudo ip addr flush dev "${ETH}" -sudo ip link set "${ETH}" master "${BRIDGE}" -sudo dhclient "${BRIDGE}" +sudo ip addr replace 192.168.251.1/24 dev br-qemu EOF chmod +x hub.sh @@ -306,15 +302,22 @@ cat > run.sh << "EOF" SHARED_PATH=/home/sven/tmp/qemu-batman/ -for i in `seq 1 5`; do +for i in $(seq 1 5); do qemu-img create -b debian.img -f qcow2 root.cow$i - normalized_id=`echo "$i"|awk '{ printf "%02d\n",$1 }'` - screen qemu-system-x86_64 -enable-kvm -kernel linux-next/arch/x86/boot/bzImage -append "root=/dev/vda rw console=ttyS0 nokaslr" \ - -smp 2 -m 512 -drive file=root.cow$i,if=virtio \ - -netdev type=tap,id=net0,ifname=tap$i,script=no -device virtio-net-pci,mac=02:ba:de:af:fe:`echo $i|awk '{ printf "%02X", $1 }'`,netdev=net0 \ + normalized_id="$(echo "$i"|awk '{ printf "%02d\n",$1 }')" + twodigit_id="$(echo $i|awk '{ printf "%02X", $1 }')" + screen qemu-system-x86_64 -enable-kvm -name "debian${i}" \ + -kernel linux-next/arch/x86/boot/bzImage -append "root=/dev/vda rw console=ttyS0 nokaslr" \ + -display none -no-user-config -nodefaults \ + -m 512 -device virtio-balloon \ + -cpu host -smp 2 -machine q35,accel=kvm,usb=off,dump-guest-core=off \ + -drive file=root.cow$i,if=virtio \ + -nic tap,ifname=tap$i,script=no,model=virtio-net-pci,mac=02:ba:de:af:fe:"${twodigit_id}" \ + -nic user,model=virtio-net-pci,mac=06:ba:de:af:fe:"${twodigit_id}" \ -virtfs local,path="${SHARED_PATH}",security_model=none,mount_tag=host \ - -gdb tcp:127.0.0.1:$((23000+$i)) \ - -device virtio-rng-pci -nographic + -gdb tcp:127.0.0.1:$((23000+$i)) \ + -device virtio-rng-pci \ + -serial mon:stdio sleep 1 done EOF @@ -339,8 +342,8 @@ insmod /host/batman-adv/net/batman-adv/batman-adv.ko batctl routing_algo BATMAN_IV /host/batctl/batctl if add dummy0 /host/batctl/batctl it 5000 -/host/batctl/batctl if add enp0s3 -ip link set up dev enp0s3 +/host/batctl/batctl if add enp0s1 +ip link set up dev enp0s1 ip link set up dev bat0 EOF @@ -376,7 +379,7 @@ On host system <pre> mkfifo remote-dump -ssh root(a)192.168.2.51 'tcpdump -i enp3s0 -s 0 -U -n -w - "port not 22"' > remote-dump +ssh root(a)192.168.251.51 'tcpdump -i enp3s0 -s 0 -U -n -w - "port not 22"' > remote-dump wireshark -k -i remote-dump </pre>

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[doc] backup-redmine/2019-10-12, master: doc: open-mesh/Emulation_Debug (06a29b3)
by postmaster＠open-mesh.org 13 Oct '19

13 Oct '19

1 0

[doc] backup-redmine/2019-10-12, master: doc: open-mesh/Emulation_Debug (885b7d1)
by postmaster＠open-mesh.org 13 Oct '19

13 Oct '19

1 0

[doc] backup-redmine/2019-10-12, master: doc: open-mesh/Emulation_Debug (b4a9bbc)
by postmaster＠open-mesh.org 13 Oct '19

13 Oct '19

1 0

[doc] backup-redmine/2019-10-12, master: doc: open-mesh/Emulation_Debug (c082ade)
by postmaster＠open-mesh.org 13 Oct '19

13 Oct '19

1 0

[doc] backup-redmine/2019-10-12, master: doc: open-mesh/Emulation_Debug (9a1fe2c)
by postmaster＠open-mesh.org 13 Oct '19

13 Oct '19

1 0

[doc] backup-redmine/2019-10-12, master: doc: open-mesh/Emulation_Debug (03a2586)
by postmaster＠open-mesh.org 13 Oct '19

13 Oct '19

1 0

[doc] backup-redmine/2019-10-12, master: doc: open-mesh/News-draft (c43f5e8)
by postmaster＠open-mesh.org 13 Oct '19

13 Oct '19

Repository : ssh://git@open-mesh.org/doc On branches: backup-redmine/2019-10-12,master >--------------------------------------------------------------- commit c43f5e8ce34e8dad2f16ef9fd6ad0f927ab293bb Author: Sven Eckelmann <sven(a)narfation.org> Date: Fri Oct 11 15:02:39 2019 +0000 doc: open-mesh/News-draft >--------------------------------------------------------------- c43f5e8ce34e8dad2f16ef9fd6ad0f927ab293bb open-mesh/News-draft.textile | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/open-mesh/News-draft.textile b/open-mesh/News-draft.textile index fde622d..ba7e227 100644 --- a/open-mesh/News-draft.textile +++ b/open-mesh/News-draft.textile @@ -1,6 +1,6 @@ h1. DRAFT: Batman-adv 2019.4 released -Oct 8th, 2019. Today the B.A.T.M.A.N. team publishes the October 2019 update to batman-adv, batctl and alfred! The B.A.T.M.A.N. V implementation can now aggregate OGM2 messages into single messages before sending them out. As usual, this release also contains various bugfixes and code cleanups. +Oct 15th, 2019. Today the B.A.T.M.A.N. team publishes the October 2019 update to batman-adv, batctl and alfred! The B.A.T.M.A.N. V implementation can now aggregate OGM2 messages into single messages before sending them out. As usual, this release also contains various bugfixes and code cleanups. As the kernel module always depends on the Linux kernel it is compiled against, it does not make sense to provide binaries on our website. As usual, you will find the signed tarballs in our download section: @@ -22,7 +22,7 @@ h2. batman-adv <pre> $ git describe origin/master v2019.3-10-gbcadeaa3 -$ range=v2019.3..v2019.3-10-gbcadeaa3 +$ range=v2019.3..v2019.3-15-g888f60e5 $ git shortlog --email --no-merges "${range}" $ git log --no-merges "${range}"|grep -e '$Reported\|Tested\|Acked\|Reviewed-by\|Co-authored-by$-by'|sed 's/.*:/*/'|sort|uniq @@ -35,6 +35,8 @@ coding style cleanup/refactoring ================================ batman-adv: Replace usage of strlcpy with strscpy + batman-adv: Fix Kconfig indentation + batman-adv: netfilter: drop bridge nf reset from nf_reset BATMAN V ========= @@ -46,11 +48,13 @@ bugfixes ======== batman-adv: fix uninit-value in batadv_netlink_get_ifindex() + batman-adv: Avoid free/alloc race when handling OGM2 buffer + batman-adv: Avoid free/alloc race when handling OGM2 buffer -2019.4 (2019-10-08) +2019.4 (2019-10-15) =================== * support latest kernels (3.16 - 5.4) @@ -60,6 +64,7 @@ bugfixes - fix length validation in netlink messages - fix out of buffer read when parsing aggregated packets + - avoid race condition in OGM(2) packet modification and submission </pre> @@ -86,7 +91,7 @@ bugfix batctl: Fix deprecation warning for option '-m' -2019.4 (2019-10-08) +2019.4 (2019-10-15) =================== * fix deprecation warning for option '-m' @@ -107,7 +112,7 @@ Sven Eckelmann <sven(a)narfation.org> (2): alfred: vis: Fix ifindex check when registering interface -2019.4 (2019-10-08) +2019.4 (2019-10-15) =================== * fix build with musl

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[doc] backup-redmine/2019-10-12, master: doc: open-mesh/Emulation_Debug: document usage of qemu gdb and linux gdb helper (31d21b8)
by postmaster＠open-mesh.org 13 Oct '19

13 Oct '19

Repository : ssh://git@open-mesh.org/doc On branches: backup-redmine/2019-10-12,master >--------------------------------------------------------------- commit 31d21b88a6a656ddc69e5bb2e45ee3f4455ef4ec Author: Sven Eckelmann <sven(a)narfation.org> Date: Fri Oct 11 23:30:52 2019 +0000 doc: open-mesh/Emulation_Debug: document usage of qemu gdb and linux gdb helper >--------------------------------------------------------------- 31d21b88a6a656ddc69e5bb2e45ee3f4455ef4ec open-mesh/Emulation_Debug.textile | 31 +++++++++++++++++++++++++++++-- 1 file changed, 29 insertions(+), 2 deletions(-) diff --git a/open-mesh/Emulation_Debug.textile b/open-mesh/Emulation_Debug.textile index 31fc6ae..8457e77 100644 --- a/open-mesh/Emulation_Debug.textile +++ b/open-mesh/Emulation_Debug.textile @@ -301,7 +301,6 @@ chmod +x hub.sh The @SHARED_PATH@ in run.sh has to be changed to a valid path which is used to share the precompiled batman-adv.ko and other tools <pre> -cat > run.sh << "EOF" #! /bin/sh SHARED_PATH=/home/sven/tmp/qemu-batman/ @@ -309,10 +308,11 @@ SHARED_PATH=/home/sven/tmp/qemu-batman/ for i in `seq 1 5`; do qemu-img create -b debian.img -f qcow2 root.cow$i normalized_id=`echo "$i"|awk '{ printf "%02d\n",$1 }'` - screen qemu-system-x86_64 -enable-kvm -kernel linux-next/arch/x86/boot/bzImage -append "root=/dev/vda rw console=ttyS0" \ + screen qemu-system-x86_64 -enable-kvm -kernel linux-next/arch/x86/boot/bzImage -append "root=/dev/vda rw console=ttyS0 nokaslr" \ -smp 2 -m 512 -drive file=root.cow$i,if=virtio \ -netdev type=tap,id=net0,ifname=tap$i,script=no -device virtio-net-pci,mac=02:ba:de:af:fe:`echo $i|awk '{ printf "%02X", $1 }'`,netdev=net0 \ -virtfs local,path="${SHARED_PATH}",security_model=none,mount_tag=host \ + -gdb tcp:127.0.0.1:$((23000+$i)) \ -device virtio-rng-pci -nographic sleep 1 done @@ -378,3 +378,30 @@ mkfifo remote-dump ssh root(a)192.168.2.51 'tcpdump -i enp3s0 -s 0 -U -n -w - "port not 22"' > remote-dump wireshark -k -i remote-dump </pre> + +h2. Using KGDB + +The instances are listening on 127.0.0.1 TCP port <code>23000 + instance_no</code>. We will use in the following example instance 1. The gdb debugger can be started from the linux source directory and all <code>lx-*</code> helpers will be automatically be loaded. + +The debugging with gdb can be started from the linux-next directory: + +<pre> +$ gdb -iex "set auto-load safe-path scripts/gdb/" -ex 'target remote 127.0.0.1:23001' -ex c ./vmlinux +</pre> + +The module can now be loaded in the qemu instance. After that, we have to reload the symbol information via <code>lx-symbol</code> and can set any kind of breakpoints on the batman-adv module: + +<pre> +^C +Thread 1 received signal SIGINT, Interrupt. +default_idle () at arch/x86/kernel/process.c:581 +581 trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id()); +(gdb) lx-symbols /home/sven/tmp/qemu-batman/batman-adv/net/batman-adv/ +loading vmlinux +scanning for modules in /home/sven/tmp/qemu-batman/batman-adv/net/batman-adv/ +scanning for modules in /home/sven/tmp/qemu-batman/linux-next +loading @0xffffffffa0000000: /home/sven/tmp/qemu-batman/batman-adv/net/batman-adv//batman-adv.ko +(gdb) b batadv_iv_send_outstanding_bat_ogm_packet +Breakpoint 1 at 0xffffffffa0005d60: file /home/sven/tmp/qemu-batman/batman-adv/net/batman-adv/bat_iv_ogm.c, line 1692. +(gdb) c +</pre> \ No newline at end of file

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[doc] backup-redmine/2019-10-12, master: doc: open-mesh/News-draft (61312dc)
by postmaster＠open-mesh.org 13 Oct '19

13 Oct '19

1 0

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