Eric Lee / smarc-fsl-linux-kernel

01 Jan, 2020

1 commit

25 Mar, 2019

2 commits

  • 0fa4c30d7   batman-adv: Make sysfs support optional ... Browse Code »

    The sysfs files will be marked as deprecated in the near future. They are
    already replaced by the batadv generic netlink family. Add an Kconfig
    option to disable the sysfs support for users who want to test their tools
    or want to safe some space. This setting should currently still be enabled
    by default to keep backward compatible with legacy tools.

    Signed-off-by: Sven Eckelmann
    Signed-off-by: Simon Wunderlich

    Sven Eckelmann
     
  • 0d5f20c42   batman-adv: Drop license boilerplate ... Browse Code »

    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
    Signed-off-by: Simon Wunderlich

    Sven Eckelmann
     

04 Jan, 2019

1 commit

15 Sep, 2018

1 commit

  • d331a7399   batman-adv: Provide debug messages as trace events ... Browse Code »

    A private debug logging infrastructure is currently provided via
    $debug_fs/batman_adv/*/log when CONFIG_BATMAN_ADV_DEBUG is enabled. This is
    not well integrated in the rest of the tracing infrastructure of the
    kernel.

    Other components (like mac80211 or ath10k) allow to gather the debug
    messages using generic trace events which are better integrated. This makes
    it possible to interact with them using the existing userspace tools.

    The tracepoint batadv:batadv_dbg will now be available when
    CONFIG_BATMAN_ADV_DEBUG and CONFIG_BATMAN_ADV_TRACING is activated. The log
    level mask is still used for filtering as usual.

    A full system trace for offline parsing can be created (and read) using:

    $ batctl ll all
    $ trace-cmd record -e batadv:batadv_dbg
    $ trace-cmd report

    The same can also be done without recording to a file

    $ batctl ll all
    $ trace-cmd stream -e batadv:batadv_dbg

    The trace infrastructure is especially helpful when tracing processes:

    $ batctl ll all
    $ ./tools/perf/perf trace --event "batadv:*" batctl p 10.204.32.1
    0.000 batadv:batadv_dbg:batman_adv bat0 Parsing outgoing ARP REQUEST
    0.045 batadv:batadv_dbg:batman_adv bat0 ARP MSG = [src: a2:64:14:53:f8:22-10.204.32.185 dst: 00:00:00:00:00:00-10.204.32.1]
    0.067 batadv:batadv_dbg:batman_adv bat0 Entry updated: 10.204.32.185 a2:64:14:53:f8:22 (vid: -1)
    0.099 batadv:batadv_dbg:batman_adv bat0 batadv_dat_select_candidates(): IP=10.204.32.1 hash(IP)=48902
    0.757 batadv:batadv_dbg:batman_adv bat0 dat_select_candidates() 0: selected fe:2c:91:68:29:2b addr=48977 dist=65460
    1.178 batadv:batadv_dbg:batman_adv bat0 dat_select_candidates() 1: selected fe:81:ab:c5:e3:03 addr=49181 dist=65256
    1.809 batadv:batadv_dbg:batman_adv bat0 dat_select_candidates() 2: selected 66:25:a7:48:37:fb addr=49328 dist=65109
    1.828 batadv:batadv_dbg:batman_adv bat0 DHT_SEND for 10.204.32.1

    Signed-off-by: Sven Eckelmann
    Signed-off-by: Simon Wunderlich

    Sven Eckelmann
     

27 Feb, 2018

1 commit

16 Dec, 2017

1 commit

  • 7db7d9f36   batman-adv: Add SPDX license identifier above copyright header ... Browse Code »

    The "Linux kernel licensing rules" require that each file has a SPDX
    license identifier as first line (and sometimes as second line).

    The FSFE REUSE practices [1] would also require the same tags but have no
    restrictions on the placement in the source file. Using the "Linux kernel
    licensing rules" is therefore also fulfilling the FSFE REUSE practices
    requirements at the same time.

    [1] https://reuse.software/practices/

    Signed-off-by: Sven Eckelmann
    Signed-off-by: Simon Wunderlich

    Sven Eckelmann
     

26 Jan, 2017

1 commit

09 Aug, 2016

1 commit

  • dc1cbd145   batman-adv: Allow to disable debugfs support ... Browse Code »

    The files provided by batman-adv via debugfs are currently converted to
    netlink. Tools which are not yet converted to use the netlink interface may
    still rely on the old debugfs files. But systems which already upgraded
    their tools can save some space by disabling this feature. The default
    configuration of batman-adv on amd64 can reduce the size of the module by
    around 11% when this feature is disabled.

    $ size net/batman-adv/batman-adv.ko*
    text data bss dec hex filename
    150507 10395 4160 165062 284c6 net/batman-adv/batman-adv.ko.y
    137106 7099 2112 146317 23b8d net/batman-adv/batman-adv.ko.n

    Signed-off-by: Sven Eckelmann
    Signed-off-by: Marek Lindner
    Signed-off-by: Simon Wunderlich

    Sven Eckelmann
     

04 Jul, 2016

2 commits

  • 33a3bb4a3   batman-adv: throughput meter implementation ... Browse Code »

    The throughput meter module is a simple, kernel-space replacement for
    throughtput measurements tool like iperf and netperf. It is intended to
    approximate TCP behaviour.

    It is invoked through batctl: the protocol is connection oriented, with
    cumulative acknowledgment and a dynamic-size sliding window.

    The test *can* be interrupted by batctl. A receiver side timeout avoids
    unlimited waitings for sender packets: after one second of inactivity, the
    receiver abort the ongoing test.

    Based on a prototype from Edo Monticelli

    Signed-off-by: Antonio Quartulli
    Signed-off-by: Sven Eckelmann
    Signed-off-by: Marek Lindner
    Signed-off-by: Simon Wunderlich

    Antonio Quartulli
     
  • 09748a22f   batman-adv: add generic netlink family for batman-adv ... Browse Code »

    debugfs is currently severely broken virtually everywhere in the kernel
    where files are dynamically added and removed (see
    http://lkml.iu.edu/hypermail/linux/kernel/1506.1/02196.html for some
    details). In addition to that, debugfs is not namespace-aware.

    Instead of adding new debugfs entries, the whole infrastructure should be
    moved to netlink. This will fix the long standing problem of large buffers
    for debug tables and hard to parse text files.

    Signed-off-by: Matthias Schiffer
    Signed-off-by: Andrew Lunn
    [sven.eckelmann@open-mesh.com: Strip down patch to only add genl family,
    add missing kerneldoc]
    Signed-off-by: Sven Eckelmann
    Signed-off-by: Marek Lindner
    Signed-off-by: Simon Wunderlich

    Matthias Schiffer
     

30 Jun, 2016

3 commits

  • ba412080f   batman-adv: Consolidate logging related functions ... Browse Code »

    There are several places in batman-adv which provide logging related
    functions. These should be grouped together in the log.* files to make them
    easier to find.

    Reported-by: Markus Pargmann
    Signed-off-by: Sven Eckelmann
    Signed-off-by: Marek Lindner
    Signed-off-by: Simon Wunderlich

    Sven Eckelmann
     
  • 01d350d14   batman-adv: move bat_algo functions into a separate file ... Browse Code »

    The bat_algo functionality in main.c is mostly unrelated to the rest of the
    content. It still takes up a large portion of this source file (~15%, 103
    lines). Moving it to a separate file makes it better visible as a main
    component of the batman-adv implementation and hides it less in the other
    helper functions in main.c.

    Signed-off-by: Sven Eckelmann
    Signed-off-by: Marek Lindner
    Signed-off-by: Simon Wunderlich

    Sven Eckelmann
     
  • 1f8dce499   batman-adv: split tvlv into a separate file ... Browse Code »

    The tvlv functionality in main.c is mostly unrelated to the rest of the
    content. It still takes up a large portion of this source file (~45%, 588
    lines). Moving it to a separate file makes it better visible as a main
    component of the batman-adv implementation and hides it less in the other
    helper functions in main.c

    Signed-off-by: Markus Pargmann
    [sven@narfation.org: fix conflicts with current version, fix includes,
    rewrote commit message]
    Signed-off-by: Sven Eckelmann
    Signed-off-by: Marek Lindner
    Signed-off-by: Simon Wunderlich

    Markus Pargmann
     

29 Feb, 2016

2 commits

  • 0da003594   batman-adv: OGMv2 - add basic infrastructure ... Browse Code »

    This is the initial implementation of the new OGM protocol
    (version 2). It has been designed to work on top of the
    newly added ELP.

    In the previous version the OGM protocol was used to both
    measure link qualities and flood the network with the metric
    information. In this version the protocol is in charge of
    the latter task only, leaving the former to ELP.

    This means being able to decouple the interval used by the
    neighbor discovery from the OGM broadcasting, which revealed
    to be costly in dense networks and needed to be relaxed so
    leading to a less responsive routing protocol.

    Signed-off-by: Antonio Quartulli
    Signed-off-by: Marek Lindner

    Antonio Quartulli
     
  • d6f94d91f   batman-adv: ELP - adding basic infrastructure ... Browse Code »

    The B.A.T.M.A.N. protocol originally only used a single
    message type (called OGM) to determine the link qualities to
    the direct neighbors and spreading these link quality
    information through the whole mesh. This procedure is
    summarized on the BATMAN concept page and explained in
    details in the RFC draft published in 2008.

    This approach was chosen for its simplicity during the
    protocol design phase and the implementation. However, it
    also bears some drawbacks:

    * Wireless interfaces usually come with some packet loss,
    therefore a higher broadcast rate is desirable to allow
    a fast reaction on flaky connections.
    Other interfaces of the same host might be connected to
    Ethernet LANs / VPNs / etc which rarely exhibit packet
    loss would benefit from a lower broadcast rate to reduce
    overhead.
    * It generally is more desirable to detect local link
    quality changes at a faster rate than propagating all
    these changes through the entire mesh (the far end of
    the mesh does not need to care about local link quality
    changes that much). Other optimizations strategies, like
    reducing overhead, might be possible if OGMs weren't
    used for all tasks in the mesh at the same time.

    As a result detecting local link qualities shall be handled
    by an independent message type, ELP, whereas the OGM message
    type remains responsible for flooding the mesh with these
    link quality information and determining the overall path
    transmit qualities.

    Developed by Linus during a 6 months trainee study period in
    Ascom (Switzerland) AG.

    Signed-off-by: Linus Luessing
    Signed-off-by: Marek Lindner
    Signed-off-by: Antonio Quartulli

    Linus Luessing
     

02 Feb, 2016

1 commit

29 May, 2015

3 commits

22 Mar, 2014

1 commit

12 Jan, 2014

1 commit

09 Jan, 2014

1 commit

12 Oct, 2013

2 commits

  • 610bfc6bc   batman-adv: Receive fragmented packets and merge ... Browse Code »

    Fragments arriving at their destination are buffered for later merge.
    Merged packets are passed to the main receive function as had they never
    been fragmented.

    Fragments are forwarded without merging if the MTU of the outgoing
    interface is smaller than the size of the merged packet.

    Signed-off-by: Martin Hundebøll
    Signed-off-by: Marek Lindner
    Signed-off-by: Antonio Quartulli

    Martin Hundebøll
     
  • f097e25db   batman-adv: Remove old fragmentation code ... Browse Code »

    Remove the existing fragmentation code before adding the new version
    and delete unicast.{h,c}.

    batadv_unicast_send_skb() is moved to send.c and renamed to
    batadv_send_skb_unicast().

    fragmentation entry in sysfs (bat_priv->fragmentation) is kept for use in
    the new fragmentation code.

    BATADV_UNICAST_FRAG packet type is renamed to BATADV_FRAG for use in the
    new fragmentation code.

    Signed-off-by: Martin Hundebøll
    Signed-off-by: Marek Lindner
    Signed-off-by: Antonio Quartulli

    Martin Hundebøll
     

10 Oct, 2013

1 commit

29 May, 2013

1 commit

27 Mar, 2013

1 commit

14 Mar, 2013

1 commit

  • d353d8d4d   batman-adv: network coding - add the initial infrastructure code ... Browse Code »

    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 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 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
    Signed-off-by: Marek Lindner
    Signed-off-by: Antonio Quartulli

    Martin Hundebøll
     

08 Nov, 2012

2 commits

02 Jul, 2012

1 commit

  • b706b13b6   batman-adv: Remove bat_ prefix from bat_{debugfs, sysfs}.{c, h} ... Browse Code »

    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 Eckelmann
     

11 Apr, 2012

2 commits

  • 7a5cc2427   batman-adv: add bridge loop avoidance compile option ... Browse Code »

    The define CONFIG_BATMAN_ADV_BLA switches the bridge loop avoidance
    on - skip it, and the bridge loop avoidance is not compiled in.

    This is useful if binary size should be saved or the feature is
    not needed.

    Signed-off-by: Simon Wunderlich
    Signed-off-by: Antonio Quartulli

    Simon Wunderlich
     
  • 23721387c   batman-adv: add basic bridge loop avoidance code ... Browse Code »

    This second version of the bridge loop avoidance for batman-adv
    avoids loops between the mesh and a backbone (usually a LAN).

    By connecting multiple batman-adv mesh nodes to the same ethernet
    segment a loop can be created when the soft-interface is bridged
    into that ethernet segment. A simple visualization of the loop
    involving the most common case - a LAN as ethernet segment:

    node1 node2
    | |
    wifi wifi

    Packets from the LAN (e.g. ARP broadcasts) will circle forever from
    node1 or node2 over the mesh back into the LAN.

    With this patch, batman recognizes backbone gateways, nodes which are
    part of the mesh and backbone/LAN at the same time. Each backbone
    gateway "claims" clients from within the mesh to handle them
    exclusively. By restricting that only responsible backbone gateways
    may handle their claimed clients traffic, loops are effectively
    avoided.

    Signed-off-by: Simon Wunderlich
    Signed-off-by: Antonio Quartulli

    Simon Wunderlich
     

17 Feb, 2012

1 commit

08 Sep, 2011

2 commits

31 Jan, 2011

1 commit

17 Dec, 2010

1 commit

  • c6c8fea29   net: Add batman-adv meshing protocol ... Browse Code »

    B.A.T.M.A.N. (better approach to mobile ad-hoc networking) is a routing
    protocol for multi-hop ad-hoc mesh networks. The networks may be wired or
    wireless. See http://www.open-mesh.org/ for more information and user space
    tools.

    Signed-off-by: Sven Eckelmann
    Signed-off-by: David S. Miller

    Sven Eckelmann