1. 04 May, 2016 31 commits
  2. 03 May, 2016 9 commits
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · 7391daf2
      Linus Torvalds authored
      Pull networking fixes from David Miller:
       "Some straggler bug fixes:
      
         1) Batman-adv DAT must consider VLAN IDs when choosing candidate
            nodes, from Antonio Quartulli.
      
         2) Fix botched reference counting of vlan objects and neigh nodes in
            batman-adv, from Sven Eckelmann.
      
         3) netem can crash when it sees GSO packets, the fix is to segment
            then upon ->enqueue.  Fix from Neil Horman with help from Eric
            Dumazet.
      
         4) Fix VXLAN dependencies in mlx5 driver Kconfig, from Matthew
            Finlay.
      
         5) Handle VXLAN ops outside of rcu lock, via a workqueue, in mlx5,
            since it can sleep.  Fix also from Matthew Finlay.
      
         6) Check mdiobus_scan() return values properly in pxa168_eth and macb
            drivers.  From Sergei Shtylyov.
      
         7) If the netdevice doesn't support checksumming, disable
            segmentation.  From Alexandery Duyck.
      
         8) Fix races between RDS tcp accept and sending, from Sowmini
            Varadhan.
      
         9) In macb driver, probe MDIO bus before we register the netdev,
            otherwise we can try to open the device before it is really ready
            for that.  Fix from Florian Fainelli.
      
        10) Netlink attribute size for ILA "tunnels" not calculated properly,
            fix from Nicolas Dichtel"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
        ipv6/ila: fix nlsize calculation for lwtunnel
        net: macb: Probe MDIO bus before registering netdev
        RDS: TCP: Synchronize accept() and connect() paths on t_conn_lock.
        RDS:TCP: Synchronize rds_tcp_accept_one with rds_send_xmit when resetting t_sock
        vxlan: Add checksum check to the features check function
        net: Disable segmentation if checksumming is not supported
        net: mvneta: Remove superfluous SMP function call
        macb: fix mdiobus_scan() error check
        pxa168_eth: fix mdiobus_scan() error check
        net/mlx5e: Use workqueue for vxlan ops
        net/mlx5e: Implement a mlx5e workqueue
        net/mlx5: Kconfig: Fix MLX5_EN/VXLAN build issue
        net/mlx5: Unmap only the relevant IO memory mapping
        netem: Segment GSO packets on enqueue
        batman-adv: Fix reference counting of hardif_neigh_node object for neigh_node
        batman-adv: Fix reference counting of vlan object for tt_local_entry
        batman-adv: B.A.T.M.A.N V - make sure iface is reactivated upon NETDEV_UP event
        batman-adv: fix DAT candidate selection (must use vid)
      7391daf2
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse · 610603a5
      Linus Torvalds authored
      Pull fuse fixes from Miklos Szeredi:
       "Fix a regression and update the MAINTAINERS entry for fuse"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
        fuse: update mailing list in MAINTAINERS
        fuse: Fix return value from fuse_get_user_pages()
      610603a5
    • Nicolas Dichtel's avatar
      ipv6/ila: fix nlsize calculation for lwtunnel · 79e8dc8b
      Nicolas Dichtel authored
      The handler 'ila_fill_encap_info' adds one attribute: ILA_ATTR_LOCATOR.
      
      Fixes: 65d7ab8d ("net: Identifier Locator Addressing module")
      CC: Tom Herbert <tom@herbertland.com>
      Signed-off-by: default avatarNicolas Dichtel <nicolas.dichtel@6wind.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      79e8dc8b
    • Wei Wang's avatar
      ipv6: add new struct ipcm6_cookie · 26879da5
      Wei Wang authored
      In the sendmsg function of UDP, raw, ICMP and l2tp sockets, we use local
      variables like hlimits, tclass, opt and dontfrag and pass them to corresponding
      functions like ip6_make_skb, ip6_append_data and xxx_push_pending_frames.
      This is not a good practice and makes it hard to add new parameters.
      This fix introduces a new struct ipcm6_cookie similar to ipcm_cookie in
      ipv4 and include the above mentioned variables. And we only pass the
      pointer to this structure to corresponding functions. This makes it easier
      to add new parameters in the future and makes the function cleaner.
      Signed-off-by: default avatarWei Wang <weiwan@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      26879da5
    • Florian Fainelli's avatar
      net: macb: Probe MDIO bus before registering netdev · cf669660
      Florian Fainelli authored
      The current sequence makes us register for a network device prior to
      registering and probing the MDIO bus which could lead to some unwanted
      consequences, like a thread of execution calling into ndo_open before
      register_netdev() returns, while the MDIO bus is not ready yet.
      
      Rework the sequence to register for the MDIO bus, and therefore attach
      to a PHY prior to calling register_netdev(), which implies reworking the
      error path a bit.
      Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
      Acked-by: default avatarNicolas Ferre <nicolas.ferre@atmel.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      cf669660
    • David S. Miller's avatar
      Merge branch 'rds-fixes' · b365d955
      David S. Miller authored
      Sowmini Varadhan says:
      
      ====================
      RDS: TCP: sychronization during connection startup
      
      This patch series ensures that the passive (accept) side of the
      TCP connection used for RDS-TCP is correctly synchronized with
      any concurrent active (connect) attempts for a given pair of peers.
      
      Patch 1 in the series makes sure that the t_sock in struct
      rds_tcp_connection is only reset after any threads in rds_tcp_xmit
      have completed (otherwise a null-ptr deref may be encountered).
      Patch 2 synchronizes rds_tcp_accept_one() with the rds_tcp*connect()
      path.
      
      v2: review comments from Santosh Shilimkar, other spelling corrections
      ====================
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      b365d955
    • Sowmini Varadhan's avatar
      RDS: TCP: Synchronize accept() and connect() paths on t_conn_lock. · bd7c5f98
      Sowmini Varadhan authored
      An arbitration scheme for duelling SYNs is implemented as part of
      commit 241b2719 ("RDS-TCP: Reset tcp callbacks if re-using an
      outgoing socket in rds_tcp_accept_one()") which ensures that both nodes
      involved will arrive at the same arbitration decision. However, this
      needs to be synchronized with an outgoing SYN to be generated by
      rds_tcp_conn_connect(). This commit achieves the synchronization
      through the t_conn_lock mutex in struct rds_tcp_connection.
      
      The rds_conn_state is checked in rds_tcp_conn_connect() after acquiring
      the t_conn_lock mutex.  A SYN is sent out only if the RDS connection is
      not already UP (an UP would indicate that rds_tcp_accept_one() has
      completed 3WH, so no SYN needs to be generated).
      
      Similarly, the rds_conn_state is checked in rds_tcp_accept_one() after
      acquiring the t_conn_lock mutex. The only acceptable states (to
      allow continuation of the arbitration logic) are UP (i.e., outgoing SYN
      was SYN-ACKed by peer after it sent us the SYN) or CONNECTING (we sent
      outgoing SYN before we saw incoming SYN).
      Signed-off-by: default avatarSowmini Varadhan <sowmini.varadhan@oracle.com>
      Acked-by: default avatarSantosh Shilimkar <santosh.shilimkar@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      bd7c5f98
    • Sowmini Varadhan's avatar
      RDS:TCP: Synchronize rds_tcp_accept_one with rds_send_xmit when resetting t_sock · eb192840
      Sowmini Varadhan authored
      There is a race condition between rds_send_xmit -> rds_tcp_xmit
      and the code that deals with resolution of duelling syns added
      by commit 241b2719 ("RDS-TCP: Reset tcp callbacks if re-using an
      outgoing socket in rds_tcp_accept_one()").
      
      Specifically, we may end up derefencing a null pointer in rds_send_xmit
      if we have the interleaving sequence:
                 rds_tcp_accept_one                  rds_send_xmit
      
                                                   conn is RDS_CONN_UP, so
          					 invoke rds_tcp_xmit
      
                                                   tc = conn->c_transport_data
              rds_tcp_restore_callbacks
                  /* reset t_sock */
          					 null ptr deref from tc->t_sock
      
      The race condition can be avoided without adding the overhead of
      additional locking in the xmit path: have rds_tcp_accept_one wait
      for rds_tcp_xmit threads to complete before resetting callbacks.
      The synchronization can be done in the same manner as rds_conn_shutdown().
      First set the rds_conn_state to something other than RDS_CONN_UP
      (so that new threads cannot get into rds_tcp_xmit()), then wait for
      RDS_IN_XMIT to be cleared in the conn->c_flags indicating that any
      threads in rds_tcp_xmit are done.
      
      Fixes: 241b2719 ("RDS-TCP: Reset tcp callbacks if re-using an
      outgoing socket in rds_tcp_accept_one()")
      Signed-off-by: default avatarSowmini Varadhan <sowmini.varadhan@oracle.com>
      Acked-by: default avatarSantosh Shilimkar <santosh.shilimkar@oracle.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      eb192840
    • Eric Dumazet's avatar
      net: add __sock_wfree() helper · 1d2077ac
      Eric Dumazet authored
      Hosts sending lot of ACK packets exhibit high sock_wfree() cost
      because of cache line miss to test SOCK_USE_WRITE_QUEUE
      
      We could move this flag close to sk_wmem_alloc but it is better
      to perform the atomic_sub_and_test() on a clean cache line,
      as it avoid one extra bus transaction.
      
      skb_orphan_partial() can also have a fast track for packets that either
      are TCP acks, or already went through another skb_orphan_partial()
      Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      1d2077ac