1. 24 Oct, 2015 2 commits
    • Jon Paul Maloy's avatar
      tipc: introduce jumbo frame support for broadcast · 959e1781
      Jon Paul Maloy authored
      
      
      Until now, we have only been supporting a fix MTU size of 1500 bytes
      for all broadcast media, irrespective of their actual capability.
      
      We now make the broadcast MTU adaptable to the carrying media, i.e.,
      we use the smallest MTU supported by any of the interfaces attached
      to TIPC.
      Signed-off-by: default avatarJon Maloy <jon.maloy@ericsson.com>
      Reviewed-by: default avatarYing Xue <ying.xue@windriver.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      959e1781
    • Jon Paul Maloy's avatar
      tipc: simplify bearer level broadcast · b06b281e
      Jon Paul Maloy authored
      
      
      Until now, we have been keeping track of the exact set of broadcast
      destinations though the help structure tipc_node_map. This leads us to
      have to maintain a whole infrastructure for supporting this, including
      a pseudo-bearer and a number of functions to manipulate both the bearers
      and the node map correctly. Apart from the complexity, this approach is
      also limiting, as struct tipc_node_map only can support cluster local
      broadcast if we want to avoid it becoming excessively large. We want to
      eliminate this limitation, in order to enable introduction of scoped
      multicast in the future.
      
      A closer analysis reveals that it is unnecessary maintaining this "full
      set" overview; it is sufficient to keep a counter per bearer, indicating
      how many nodes can be reached via this bearer at the moment. The protocol
      is now robust enough to handle transitional discrepancies between the
      nominal number of reachable destinations, as expected by the broadcast
      protocol itself, and the number which is actually reachable at the
      moment. The initial broadcast synchronization, in conjunction with the
      retransmission mechanism, ensures that all packets will eventually be
      acknowledged by the correct set of destinations.
      
      This commit introduces these changes.
      Signed-off-by: default avatarJon Maloy <jon.maloy@ericsson.com>
      Reviewed-by: default avatarYing Xue <ying.xue@windriver.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b06b281e
  2. 16 Oct, 2015 1 commit
    • Jon Paul Maloy's avatar
      tipc: send out RESET immediately when link goes down · 282b3a05
      Jon Paul Maloy authored
      
      
      When a link is taken down because of a node local event, such as
      disabling of a bearer or an interface, we currently leave it to the
      peer node to discover the broken communication. The default time for
      such failure discovery is 1.5-2 seconds.
      
      If we instead allow the terminating link endpoint to send out a RESET
      message at the moment it is reset, we can achieve the impression that
      both endpoints are going down instantly. Since this is a very common
      scenario, we find it worthwhile to make this small modification.
      
      Apart from letting the link produce the said message, we also have to
      ensure that the interface is able to transmit it before TIPC is
      detached. We do this by performing the disabling of a bearer in three
      steps:
      
      1) Disable reception of TIPC packets from the interface in question.
      2) Take down the links, while allowing them so send out a RESET message.
      3) Disable transmission of TIPC packets on the interface.
      
      Apart from this, we now have to react on the NETDEV_GOING_DOWN event,
      instead of as currently the NEDEV_DOWN event, to ensure that such
      transmission is possible during the teardown phase.
      Signed-off-by: default avatarJon Maloy <jon.maloy@ericsson.com>
      Acked-by: default avatarYing Xue <ying.xue@windriver.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      282b3a05
  3. 31 Jul, 2015 1 commit
  4. 21 Jul, 2015 1 commit
    • Jon Paul Maloy's avatar
      tipc: make media xmit call outside node spinlock context · af9b028e
      Jon Paul Maloy authored
      
      
      Currently, message sending is performed through a deep call chain,
      where the node spinlock is grabbed and held during a significant
      part of the transmission time. This is clearly detrimental to
      overall throughput performance; it would be better if we could send
      the message after the spinlock has been released.
      
      In this commit, we do instead let the call revert on the stack after
      the buffer chain has been added to the transmission queue, whereafter
      clones of the buffers are transmitted to the device layer outside the
      spinlock scope.
      
      As a further step in our effort to separate the roles of the node
      and link entities we also move the function tipc_link_xmit() to
      node.c, and rename it to tipc_node_xmit().
      Reviewed-by: default avatarYing Xue <ying.xue@windriver.com>
      Signed-off-by: default avatarJon Maloy <jon.maloy@ericsson.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      af9b028e
  5. 14 May, 2015 1 commit
  6. 09 May, 2015 1 commit
  7. 29 Apr, 2015 1 commit
  8. 10 Mar, 2015 1 commit
    • Jon Paul Maloy's avatar
      tipc: ensure that idle links are deleted when a bearer is disabled · 169bf912
      Jon Paul Maloy authored
      commit afaa3f65
      
      
      (tipc: purge links when bearer is disabled) was an attempt to resolve
      a problem that turned out to have a more profound reason.
      
      When we disable a bearer, we delete all its pertaining links if
      there is no other bearer to perform failover to, or if the module
      is shutting down. In case there are dual bearers, we wait with
      deleting links until the failover procedure is finished.
      
      However, this misses the case when a link on the removed bearer
      was already down, so that there will be no failover procedure to
      finish the link delete. This causes confusion if a new bearer is
      added to replace the removed one, and also entails a small memory
      leak.
      
      This commit takes the current state of the link into account when
      deciding when to delete it, and also reverses the above-mentioned
      commit.
      Reviewed-by: default avatarErik Hugne <erik.hugne@ericsson.com>
      Signed-off-by: default avatarJon Maloy <jon.maloy@ericsson.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      169bf912
  9. 06 Mar, 2015 1 commit
  10. 27 Feb, 2015 1 commit
  11. 09 Feb, 2015 6 commits
  12. 12 Jan, 2015 5 commits
  13. 24 Nov, 2014 1 commit
  14. 21 Nov, 2014 5 commits
  15. 14 May, 2014 1 commit
    • Jon Paul Maloy's avatar
      tipc: improve and extend media address conversion functions · 38504c28
      Jon Paul Maloy authored
      
      
      TIPC currently handles two media specific addresses: Ethernet MAC
      addresses and InfiniBand addresses. Those are kept in three different
      formats:
      
      1) A "raw" format as obtained from the device. This format is known
         only by the media specific adapter code in eth_media.c and
         ib_media.c.
      2) A "generic" internal format, in the form of struct tipc_media_addr,
         which can be referenced and passed around by the generic media-
         unaware code.
      3) A serialized version of the latter, to be conveyed in neighbor
         discovery messages.
      
      Conversion between the three formats can only be done by the media
      specific code, so we have function pointers for this purpose in
      struct tipc_media. Here, the media adapters can install their own
      conversion functions at startup.
      
      We now introduce a new such function, 'raw2addr()', whose purpose
      is to convert from format 1 to format 2 above. We also try to as far
      as possible uniform commenting, variable names and usage of these
      functions, with the purpose of making them more comprehensible.
      
      We can now also remove the function tipc_l2_media_addr_set(), whose
      job is done better by the new function.
      
      Finally, we expand the field for serialized addresses (format 3)
      in discovery messages from 20 to 32 bytes. This is permitted
      according to the spec, and reduces the risk of problems when we
      add new media in the future.
      Signed-off-by: default avatarJon Maloy <jon.maloy@ericsson.com>
      Reviewed-by: default avatarYing Xue <ying.xue@windriver.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      38504c28
  16. 23 Apr, 2014 9 commits
  17. 28 Mar, 2014 2 commits