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path: root/net/batman-adv/sysfs.c
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2013-08-28batman-adv: send GW_DEL event when the gw client mode is deselectedAntonio Quartulli
Whenever the GW client mode is deselected, a DEL event has to be sent in order to tell userspace that the current gateway has been lost. Send the uevent on state change only if a gateway was currently selected. Reported-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <antonio@open-mesh.com> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2013-06-10batman-adv: wait for rtnl in batadv_store_mesh_iface instead of failing if ↵Matthias Schiffer
it is taken The rtnl_lock in batadv_store_mesh_iface has been converted to a rtnl_trylock some time ago to avoid a possible deadlock between rtnl and s_active on removal of the sysfs nodes. The behaviour introduced by that was quite confusing as it could lead to the sysfs store to fail, making batman-adv setup scripts unreliable. As recently the sysfs removal was postponed to a worker not running with the rtnl taken, the deadlock can't occur any more and it is safe to change the trylock back to a lock to make the sysfs store reliable again. Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net> Reviewed-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2013-03-27batman-adv: Don't always delete softif when last slave was removedSven Eckelmann
batman-adv has an unusual way to manage softinterfaces. These will be created automatically when a user writes to the batman-adv/mesh_iface file in sysfs and removed when no slave device exists anymore. This behaviour cannot be changed without breaking compatibility with existing code. Instead other interfaces should be able to slightly reduce this behaviour and provide a more common reaction to a removal of a slave interface. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Acked-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2013-03-13batman-adv: network coding - add the initial infrastructure codeMartin Hundebøll
Network coding exploits the 802.11 shared medium to allow multiple packets to be sent in a single transmission. In brief, a relay can XOR two packets, and send the coded packet to two destinations. The receivers can decode one of the original packets by XOR'ing the coded packet with the other original packet. This will lead to increased throughput in topologies where two packets cross one relay. In a simple topology with three nodes, it takes four transmissions without network coding to get one packet from Node A to Node B and one from Node B to Node A: 1. Node A ---- p1 ---> Node R Node B 2. Node A Node R <--- p2 ---- Node B 3. Node A <--- p2 ---- Node R Node B 4. Node A Node R ---- p1 ---> Node B With network coding, the relay only needs one transmission, which saves us one slot of valuable airtime: 1. Node A ---- p1 ---> Node R Node B 2. Node A Node R <--- p2 ---- Node B 3. Node A <- p1 x p2 - Node R - p1 x p2 -> Node B The same principle holds for a topology including five nodes. Here the packets from Node A and Node B are overheard by Node C and Node D, respectively. This allows Node R to send a network coded packet to save one transmission: Node A Node B | \ / | | p1 p2 | | \ / | p1 > Node R < p2 | | | / \ | | p1 x p2 p1 x p2 | v / \ v / \ Node C < > Node D More information is available on the open-mesh.org wiki[1]. This patch adds the initial code to support network coding in batman-adv. It sets up a worker thread to do house keeping and adds a sysfs file to enable/disable network coding. The feature is disabled by default, as it requires a wifi-driver with working promiscuous mode, and also because it adds a small delay at each hop. [1] http://www.open-mesh.org/projects/batman-adv/wiki/Catwoman Signed-off-by: Martin Hundebøll <martin@hundeboll.net> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2013-03-13batman-adv: replace redundant primary_if_get callsMarek Lindner
The batadv_priv struct carries a pointer to its own interface struct. Therefore, it is not necessary to retrieve the soft_iface via the primary interface. Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2013-01-19batman-adv: update copyright yearsAntonio Quartulli
Signed-off-by: Antonio Quartulli <ordex@autistici.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
2012-11-14batman-adv: Remove instant overwritten variable initializationSven Eckelmann
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-11-07batman-adv: Distributed ARP Table - add runtime switchAntonio Quartulli
This patch adds a runtime switch that enables the user to turn the DAT feature on or off at runtime Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-10-29batman-adv: Remove unused define BAT_ATTR_HIF_UINTSven Eckelmann
Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Marek Lindner <lindner_marek@yahoo.de> Signed-off-by: Antonio Quartulli <ordex@autistici.org>
2012-07-01batman-adv: Remove bat_ prefix from bat_{debugfs, sysfs}.{c, h}Sven Eckelmann
The "bat_" prefix in the source files implementing the batman-adv sysfs and debugfs interface doesn't have a special meaning and are only used by these files and files that implement the actual B.A.T.M.A.N. path finding algorithm. The prefix is better suited to mark files that are used to implement the main part of the path finding. All other files should not use it and therefore gets renamed. Signed-off-by: Sven Eckelmann <sven@narfation.org>