batman-adv: Use consistent name for mesh interface

The way how the virtual interface is called inside the batman-adv source
code is not consistent. The genl headers call it meshif and the rest of th

batman-adv: Use consistent name for mesh interface

The way how the virtual interface is called inside the batman-adv source
code is not consistent. The genl headers call it meshif and the rest of the
code calls is (mostly) softif.

The genl definitions cannot be touched because they are part of the UAPI.
But the rest of the batman-adv code can be touched to have a consistent
name again.

The bulk of the renaming was done using

sed -i -e 's/soft\(-\|\_\| \|\)i\([nf]\)/mesh\1i\2/g' \
-e 's/SOFT\(-\|\_\| \|\)I\([NF]\)/MESH\1I\2/g'

and then it was adjusted slightly when proofreading the changes.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Drop publication years from copyright info

The batman-adv source code was using the year of publication (to net-next)
as "last" year for the copyright statement. The whole source code me

batman-adv: Drop publication years from copyright info

The batman-adv source code was using the year of publication (to net-next)
as "last" year for the copyright statement. The whole source code mentioned
in the MAINTAINERS "BATMAN ADVANCED" section was handled as a single entity
regarding the publishing year.

This avoided having outdated (in sense of year information - not copyright
holder) publishing information inside several files. But since the simple
"update copyright year" commit (without other changes) in the file was not
well received in the upstream kernel, the option to not have a copyright
year (for initial and last publication) in the files are chosen instead.
More detailed information about the years can still be retrieved from the
SCM system.

Signed-off-by: Sven Eckelmann <[email protected]>
Acked-by: Marek Lindner <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Allow selection of routing algorithm over rtnetlink

A batadv net_device is associated to a B.A.T.M.A.N. routing algorithm. This
algorithm has to be selected before the interface is initi

batman-adv: Allow selection of routing algorithm over rtnetlink

A batadv net_device is associated to a B.A.T.M.A.N. routing algorithm. This
algorithm has to be selected before the interface is initialized and cannot
be changed after that. The only way to select this algorithm was a module
parameter which specifies the default algorithm used during the creation of
the net_device.

This module parameter is writeable over
/sys/module/batman_adv/parameters/routing_algo and thus allows switching of
the routing algorithm:

1. change routing_algo parameter
2. create new batadv net_device

But this is not race free because another process can be scheduled between
1 + 2 and in that time frame change the routing_algo parameter again.

It is much cleaner to directly provide this information inside the
rtnetlink's RTM_NEWLINK message. The two processes would be (in regards of
the creation parameter of their batadv interfaces) be isolated. This also
eases the integration of batadv devices inside tools like network-manager
or systemd-networkd which are not expecting to operate on /sys before a new
net_device is created.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Prepare infrastructure for newlink settings

The batadv generic netlink family can be used to retrieve the current state
and set various configuration settings. But there are also setting

batman-adv: Prepare infrastructure for newlink settings

The batadv generic netlink family can be used to retrieve the current state
and set various configuration settings. But there are also settings which
must be set before the actual interface is created.

The rtnetlink already uses IFLA_INFO_DATA to allow net_device families to
transfer such configurations. The minimal required functionality for this
is now available for the batadv rtnl_link_ops. Also a new IFLA class of
attributes will be attached to it because rtnetlink only allows 51
different attributes but batadv_nl_attrs already contains 62 attributes.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Introduce a configurable per interface hop penalty

In some setups multiple hard interfaces with similar link qualities
or throughput values are available. But people have expressed the d

batman-adv: Introduce a configurable per interface hop penalty

In some setups multiple hard interfaces with similar link qualities
or throughput values are available. But people have expressed the desire
to consider one of them as a backup only.

Some creative solutions are currently in use: Such people are
configuring multiple batman-adv mesh/soft interfaces, wire them
together with some veth pairs and then tune the hop penalty to achieve
an effect similar to a tunable per interface hop penalty.

This patch introduces a new, configurable, per hard interface hop penalty
to simplify such setups.

Signed-off-by: Linus Lüssing <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Fix typos and grammar in documentation

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

batman-adv: Update copyright years for 2020

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

batman-adv: Add multicast-to-unicast support for multiple targets

With this patch multicast packets with a limited number of destinations
(current default: 16) will be split and transmitted by the o

batman-adv: Add multicast-to-unicast support for multiple targets

With this patch multicast packets with a limited number of destinations
(current default: 16) will be split and transmitted by the originator as
individual unicast transmissions.

Wifi broadcasts with their low bitrate are still a costly undertaking.
In a mesh network this cost multiplies with the overall size of the mesh
network. Therefore using multiple unicast transmissions instead of
broadcast flooding is almost always less burdensome for the mesh
network.

The maximum amount of unicast packets can be configured via the newly
introduced multicast_fanout parameter. If this limit is exceeded
distribution will fall back to classic broadcast flooding.

The multicast-to-unicast conversion is performed on the initial
multicast sender node and counts on a final destination node, mesh-wide
basis (and not next hop, neighbor node basis).

Signed-off-by: Linus Lüssing <[email protected]>
Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Drop license boilerplate

All files got a SPDX-License-Identifier with commit 7db7d9f369a4
("batman-adv: Add SPDX license identifier above copyright header"). All the
required information

batman-adv: Drop license boilerplate

All files got a SPDX-License-Identifier with commit 7db7d9f369a4
("batman-adv: Add SPDX license identifier above copyright header"). All the
required information about the license conditions can be found in
LICENSES/.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Add throughput_override hardif genl configuration

The B.A.T.M.A.N. V implementation tries to estimate the link throughput of
an interface to an originator using different automatic metho

batman-adv: Add throughput_override hardif genl configuration

The B.A.T.M.A.N. V implementation tries to estimate the link throughput of
an interface to an originator using different automatic methods. It is
still possible to overwrite it the link throughput for all reachable
originators via this interface.

The BATADV_CMD_SET_HARDIF/BATADV_CMD_GET_HARDIF commands allow to set/get
the configuration of this feature using the u32
BATADV_ATTR_THROUGHPUT_OVERRIDE attribute. The used unit is in 100 Kbit/s.
If the value is set to 0 then batman-adv will try to estimate the
throughput by itself.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Add elp_interval hardif genl configuration

The ELP packets are transmitted every elp_interval milliseconds on an
slave/hard-interface. This value can be changed using the configuration
i

batman-adv: Add elp_interval hardif genl configuration

The ELP packets are transmitted every elp_interval milliseconds on an
slave/hard-interface. This value can be changed using the configuration
interface.

The BATADV_CMD_SET_HARDIF/BATADV_CMD_GET_HARDIF commands allow to set/get
the configuration of this feature using the u32 BATADV_ATTR_ELP_INTERVAL
attribute.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Add orig_interval mesh genl configuration

The OGM packets are transmitted every orig_interval milliseconds. This
value can be changed using the configuration interface.

The BATADV_CMD_S

batman-adv: Add orig_interval mesh genl configuration

The OGM packets are transmitted every orig_interval milliseconds. This
value can be changed using the configuration interface.

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the
configuration of this feature using the u32 BATADV_ATTR_ORIG_INTERVAL
attribute.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Add network_coding mesh genl configuration

The mesh interface can use (in an homogeneous mesh) network coding, a
mechanism that aims to increase the overall network throughput by fusing

batman-adv: Add network_coding mesh genl configuration

The mesh interface can use (in an homogeneous mesh) network coding, a
mechanism that aims to increase the overall network throughput by fusing
multiple packets in one transmission.

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the
configuration of this feature using the BATADV_ATTR_NETWORK_CODING_ENABLED
attribute. Setting the u8 to zero will disable this feature and setting it
to something else is enabling this feature.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Add multicast forceflood mesh genl configuration

The mesh interface can optimize the flooding of multicast packets based on
the content of the global translation tables. To disable this

batman-adv: Add multicast forceflood mesh genl configuration

The mesh interface can optimize the flooding of multicast packets based on
the content of the global translation tables. To disable this behavior and
use the broadcast-like flooding of the packets, forceflood has to be
enabled.

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the
configuration of this feature using the
BATADV_ATTR_MULTICAST_FORCEFLOOD_ENABLED attribute. Setting the u8 to zero
will disable this feature (allowing multicast optimizations) and setting it
to something else is enabling this feature (forcing simple flooding).

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Add log_level mesh genl configuration

In contrast to other modules, batman-adv allows to set the debug message
verbosity per mesh/soft-interface and not per module (via modparam).

The B

batman-adv: Add log_level mesh genl configuration

In contrast to other modules, batman-adv allows to set the debug message
verbosity per mesh/soft-interface and not per module (via modparam).

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the
configuration of this feature using the u32 (bitmask) BATADV_ATTR_LOG_LEVEL
attribute.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Add hop_penalty mesh genl configuration

The TQ (B.A.T.M.A.N. IV) and throughput values (B.A.T.M.A.N. V) are reduced
when they are forwarded. One of the reductions is the penalty for
trav

batman-adv: Add hop_penalty mesh genl configuration

The TQ (B.A.T.M.A.N. IV) and throughput values (B.A.T.M.A.N. V) are reduced
when they are forwarded. One of the reductions is the penalty for
traversing an additional hop. This hop_penalty (0-255) defines the
percentage of reduction (0-100%).

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the
configuration of this feature using the u8 BATADV_ATTR_HOP_PENALTY
attribute.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Add gateway mesh genl configuration

The mesh/soft-interface can optimize the handling of DHCP packets. Instead
of flooding them through the whole mesh, it can be forwarded as unicast to

batman-adv: Add gateway mesh genl configuration

The mesh/soft-interface can optimize the handling of DHCP packets. Instead
of flooding them through the whole mesh, it can be forwarded as unicast to
a specific gateway server. The originator which injects the packets in the
mesh has to select (based on sel_class thresholds) a responsible gateway
server. This is done by switching this originator to the gw_mode client.
The servers announce their forwarding bandwidth (download/upload) when the
gw_mode server was selected.

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the
configuration of this feature using the attributes:

* u8 BATADV_ATTR_GW_MODE (0 == off, 1 == client, 2 == server)
* u32 BATADV_ATTR_GW_BANDWIDTH_DOWN (in 100 kbit/s steps)
* u32 BATADV_ATTR_GW_BANDWIDTH_UP (in 100 kbit/s steps)
* u32 BATADV_ATTR_GW_SEL_CLASS

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Add fragmentation mesh genl configuration

The mesh interface can fragment unicast packets when the packet size
exceeds the outgoing slave/hard-interface MTU.

The BATADV_CMD_SET_MESH/BAT

batman-adv: Add fragmentation mesh genl configuration

The mesh interface can fragment unicast packets when the packet size
exceeds the outgoing slave/hard-interface MTU.

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the
configuration of this feature using the BATADV_ATTR_FRAGMENTATION_ENABLED
attribute. Setting the u8 to zero will disable this feature and setting it
to something else is enabling this feature.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Add distributed_arp_table mesh genl configuration

The mesh interface can use a distributed hash table to answer ARP requests
without flooding the request through the whole mesh.

The BAT

batman-adv: Add distributed_arp_table mesh genl configuration

The mesh interface can use a distributed hash table to answer ARP requests
without flooding the request through the whole mesh.

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the
configuration of this feature using the
BATADV_ATTR_DISTRIBUTED_ARP_TABLE_ENABLED attribute. Setting the u8 to zero
will disable this feature and setting it to something else is enabling this
feature.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Add bridge_loop_avoidance mesh genl configuration

The mesh interface can try to detect loops in the same mesh caused by
(indirectly) bridged mesh/soft-interfaces of different nodes. Some

batman-adv: Add bridge_loop_avoidance mesh genl configuration

The mesh interface can try to detect loops in the same mesh caused by
(indirectly) bridged mesh/soft-interfaces of different nodes. Some of the
loops can also be resolved without breaking the mesh.

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the
configuration of this feature using the
BATADV_ATTR_BRIDGE_LOOP_AVOIDANCE_ENABLED attribute. Setting the u8 to zero
will disable this feature and setting it to something else is enabling this
feature.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Add bonding mesh genl configuration

The mesh interface can use multiple slave/hard-interface ports at the same
time to transport the traffic to other nodes.

The BATADV_CMD_SET_MESH/BATA

batman-adv: Add bonding mesh genl configuration

The mesh interface can use multiple slave/hard-interface ports at the same
time to transport the traffic to other nodes.

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the
configuration of this feature using the BATADV_ATTR_BONDING_ENABLED
attribute. Setting the u8 to zero will disable this feature and setting it
to something else is enabling this feature.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Add ap_isolation mesh/vlan genl configuration

The mesh interface can drop messages between clients to implement a
mesh-wide AP isolation.

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH and

batman-adv: Add ap_isolation mesh/vlan genl configuration

The mesh interface can drop messages between clients to implement a
mesh-wide AP isolation.

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH and
BATADV_CMD_SET_VLAN/BATADV_CMD_GET_VLAN commands allow to set/get the
configuration of this feature using the BATADV_ATTR_AP_ISOLATION_ENABLED
attribute. Setting the u8 to zero will disable this feature and setting it
to something else is enabling this feature.

This feature also requires that skbuff which should be handled as isolated
are marked. The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to
set/get the mark/mask using the u32 attributes BATADV_ATTR_ISOLATION_MARK
and BATADV_ATTR_ISOLATION_MASK.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Add aggregated_ogms mesh genl configuration

The mesh interface can delay OGM messages to aggregate different ogms
together in a single OGM packet.

The BATADV_CMD_SET_MESH/BATADV_CMD_GET

batman-adv: Add aggregated_ogms mesh genl configuration

The mesh interface can delay OGM messages to aggregate different ogms
together in a single OGM packet.

The BATADV_CMD_SET_MESH/BATADV_CMD_GET_MESH commands allow to set/get the
configuration of this feature using the BATADV_ATTR_AGGREGATED_OGMS_ENABLED
attribute. Setting the u8 to zero will disable this feature and setting it
to something else is enabling this feature.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Prepare framework for vlan genl config

The batman-adv configuration interface was implemented solely using sysfs.
This approach was condemned by non-batadv developers as "huge mistake".

batman-adv: Prepare framework for vlan genl config

The batman-adv configuration interface was implemented solely using sysfs.
This approach was condemned by non-batadv developers as "huge mistake".
Instead a netlink/genl based implementation was suggested.

Beside the mesh/soft-interface specific configuration, the VLANs on top of
the mesh/soft-interface have configuration settings. The genl interface
reflects this by allowing to get/set it using the vlan specific commands
BATADV_CMD_GET_VLAN/BATADV_CMD_SET_VLAN.

The set command BATADV_CMD_SET_MESH will also notify interested userspace
listeners of the "config" mcast group using the BATADV_CMD_SET_VLAN command
message type that settings might have been changed and what the current
values are.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...

batman-adv: Prepare framework for hardif genl config

The batman-adv configuration interface was implemented solely using sysfs.
This approach was condemned by non-batadv developers as "huge mistake"

batman-adv: Prepare framework for hardif genl config

The batman-adv configuration interface was implemented solely using sysfs.
This approach was condemned by non-batadv developers as "huge mistake".
Instead a netlink/genl based implementation was suggested.

Beside the mesh/soft-interface specific configuration, the
slave/hard-interface have B.A.T.M.A.N. V specific configuration settings.
The genl interface reflects this by allowing to get/set it using the
hard-interface specific commands.

The BATADV_CMD_GET_HARDIFS (or short version BATADV_CMD_GET_HARDIF) is
reused as get command because it already allow sto dump the content of
other information from the slave/hard-interface which are not yet
configuration specific.

The set command BATADV_CMD_SET_HARDIF will also notify interested userspace
listeners of the "config" mcast group using the BATADV_CMD_SET_HARDIF
command message type that settings might have been changed and what the
current values are.

Signed-off-by: Sven Eckelmann <[email protected]>
Signed-off-by: Simon Wunderlich <[email protected]>

show more ...