diff options
Diffstat (limited to 'drivers/staging/batman-adv/README')
| -rw-r--r-- | drivers/staging/batman-adv/README | 84 |
1 files changed, 54 insertions, 30 deletions
diff --git a/drivers/staging/batman-adv/README b/drivers/staging/batman-adv/README index 3aaf393ebaa7..7d666ad04359 100644 --- a/drivers/staging/batman-adv/README +++ b/drivers/staging/batman-adv/README @@ -1,4 +1,4 @@ -[state: 07-11-2009] +[state: 06-01-2010] BATMAN-ADV ---------- @@ -15,19 +15,6 @@ above B.A.T.M.A.N. Advanced, prominent examples are: IPv4, IPv6, DHCP, IPX. This is batman-advanced implemented as Linux kernel driver. It does not depend on any network (other) driver, and can be used on wifi as well as ethernet, vpn, etc ... (anything with ethernet-style layer 2). -It compiles against and should work with Linux 2.6.20 - 2.6.31. Supporting older -versions is not planned, but it's probably easy to backport it. If you work on a -backport, feel free to contact us. :-) - -COMPILE -------- -To compile against your currently installed kernel, just type: - -# make - -if you want to compile against some other kernel, use: - -# make KERNELPATH=/path/to/kernel USAGE ----- @@ -73,16 +60,9 @@ When configured as server, you can get a topology snapshot of your mesh: # cat /proc/net/batman-adv/vis -This output format is a graphviz formatted text file which can be -processed with graphviz-tools like dot. -The labels are similar/compatible to the ETX metric, 1.0 means perfect -connection (100%), 2.0 means 50%, 3.0 means 33% and so on. - -Alternatively, a JSON output format is available. The format can be set -using by writing either "dot_draw" or "json" into the vis_format file. -"dot_draw" is selected by default. - -echo "json" > /proc/net/batman-adv/vis_format +The output is in a generic raw format. Use the batctl tool (See below) +to convert this to other formats more suitable for graphing, eg +graphviz dot, or JSON data-interchange format. In very mobile scenarios, you might want to adjust the originator interval to a lower value. This will make the mesh more responsive to @@ -96,15 +76,59 @@ To deactivate batman, do: # echo "" > /proc/net/batman-adv/interfaces +LOGGING/DEBUGGING +----------------- + +All error messages, warnings and information messages are sent to the +kernel log. Depending on your operating system distribution this can be +read in one of a number of ways. Try using the commands: dmesg, +logread, or looking in the files /var/log/kern.log or +/var/log/syslog. All batman-adv messages are prefixed with +"batman-adv:" So to see just these messages try + +dmesg | grep batman-adv + +When investigating problems with your mesh network it is sometimes +necessary to see more detail debug messages. This must be enabled when +compiling the batman-adv module. Use "make menuconfig" and enable the +option "B.A.T.M.A.N. debugging". + +The additional debug output is by default disabled. It can be enabled +either at kernel module load time or during run time. To enable debug +output at module load time, add the module parameter debug=<value>. +<value> can take one of four values. + +0 - All debug output disabled +1 - Enable messages related to routing / flooding / broadcasting +2 - Enable route or hna added / changed / deleted +3 - Enable all messages + +e.g. + +modprobe batman-adv debug=2 + +will load the module and enable debug messages for when routes or HNAs +change. + +The debug output can also be changed at runtime using the file +/sys/module/batman-adv/parameters/debug. e.g. + +echo 2 > /sys/module/batman-adv/parameters/debug + +enables debug messages for when routes or HNAs + +The debug output is sent to the kernel logs. So try dmesg, logread etc +to see the debug messages. + BATCTL ------ -B.A.T.M.A.N. advanced operates on layer 2 and thus all hosts partici- -pating in the virtual switch are completely transparent for all proto- -cols above layer 2. Therefore the common diagnosis tools do not work as -expected. To overcome these problems batctl was created. At the moment -the batctl contains ping, traceroute, tcpdump and interfaces to the -kernel module settings. +B.A.T.M.A.N. advanced operates on layer 2 and thus all hosts +participating in the virtual switch are completely transparent for all +protocols above layer 2. Therefore the common diagnosis tools do not +work as expected. To overcome these problems batctl was created. At +the moment the batctl contains ping, traceroute, tcpdump and +interfaces to the kernel module settings. For more information, please see the manpage (man batctl). |