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an title='2017-02-06 22:53:13 -0500'>2017-02-06bridge: modify bridge and port to have often accessed fields in one cache lineNikolay Aleksandrov1-23/+20 Move around net_bridge so the vlan fields are in the beginning since they're checked on every packet even if vlan filtering is disabled. For the port move flags & vlan group to the beginning, so they're in the same cache line with the port's state (both flags and state are checked on each packet). Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net> 2017-02-06bpf: enable verifier to add 0 to packet ptrWilliam Tu2-1/+24 The patch fixes the case when adding a zero value to the packet pointer. The zero value could come from src_reg equals type BPF_K or CONST_IMM. The patch fixes both, otherwise the verifer reports the following error: [...] R0=imm0,min_value=0,max_value=0 R1=pkt(id=0,off=0,r=4) R2=pkt_end R3=fp-12 R4=imm4,min_value=4,max_value=4 R5=pkt(id=0,off=4,r=4) 269: (bf) r2 = r0 // r2 becomes imm0 270: (77) r2 >>= 3 271: (bf) r4 = r1 // r4 becomes pkt ptr 272: (0f) r4 += r2 // r4 += 0 addition of negative constant to packet pointer is not allowed Signed-off-by: William Tu <u9012063@gmail.com> Signed-off-by: Mihai Budiu <mbudiu@vmware.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net> 2017-02-06bpf: test for AND edge casesJosef Bacik1-0/+55 These two tests are based on the work done for f23cc643f9ba. The first test is just a basic one to make sure we don't allow AND'ing negative values, even if it would result in a valid index for the array. The second is a cleaned up version of the original testcase provided by Jann Horn that resulted in the commit. Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net> 2017-02-06Merge branch 'dsa-add-fabric-notifier'David S. Miller7-49/+205 Vivien Didelot says: ==================== net: dsa: add fabric notifier When a switch fabric is composed of multiple switch chips, these chips must be programmed accordingly when an event occurred on one of them. Examples of such event include hardware bridging: when a Linux bridge spans interconnected chips, they must be programmed to allow external ports to ingress frames on their internal ports. Another example is cross-chip hardware VLANs. Switch chips in-between interconnected bridge ports must also configure a given VLAN to allow packets to pass through them. In order to support that, this patchset introduces a non-intrusive notifier mechanism. It adds a notifier head in every DSA switch tree (the said fabric), and a notifier block in every DSA switch chip. When an even occurs, it is chained to all notifiers of the fabric. Switch chips can react accordingly if they are cross-chip capable. On a dynamic debug enabled system, bridging a port in a multi-chip fabric will print something like this (ZII Rev B board): # brctl addif br0 lan3 mv88e6085 0.1:00: crosschip DSA port 1.0 bridged to br0 mv88e6085 0.4:00: crosschip DSA port 1.0 bridged to br0 # brctl delif br0 lan3 mv88e6085 0.1:00: crosschip DSA port 1.0 unbridged from br0 mv88e6085 0.4:00: crosschip DSA port 1.0 unbridged from br0 Currently only bridging events are added. A patchset introducing support for cross-chip hardware bridging configuration in mv88e6xxx will follow right after. Then events for switchdev operations are next on the line. We should note that non-switchdev events do not support rolling-back switch-wide operations. We'll have to work on closer integration with switchdev for that, like introducing new attributes or objects, to benefit from the prepare and commit phases. ==================== Signed-off-by: David S. Miller <davem@davemloft.net> 2017-02-06net: dsa: introduce bridge notifierVivien Didelot3-11/+71 A slave device will now notify the switch fabric once its port is bridged or unbridged, instead of calling directly its switch operations. This code allows propagating cross-chip bridging events in the fabric. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net> 2017-02-06net: dsa: add switch notifierVivien Didelot6-0/+77 Add a notifier block per DSA switch, registered against a notifier head in the switch fabric they belong to. This infrastructure will allow to propagate fabric-wide events such as port bridging, VLAN configuration, etc. If a DSA switch driver cares about cross-chip configuration, such events can be caught. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net> 2017-02-06net: dsa: change state setter scopeVivien Didelot1-6/+9 The scope of the functions inside net/dsa/slave.c must be the slave net_device pointer. Change to state setter helper accordingly to simplify callers. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net> 2017-02-06net: dsa: rollback bridging on errorVivien Didelot1-1/+13 When an error is returned during the bridging of a port in a NETDEV_CHANGEUPPER event, net/core/dev.c rolls back the operation. Be consistent and unassign dp->bridge_dev when this happens. In the meantime, add comments to document this behavior. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net> 2017-02-06net: dsa: simplify netdevice events handlingVivien Didelot1-28/+16 Simplify the code handling the slave netdevice notifier call by providing a dsa_slave_changeupper helper for NETDEV_CHANGEUPPER, and so on (only this event is supported at the moment.) Return NOTIFY_DONE when we did not care about an event, and NOTIFY_OK when we were concerned but no error occurred, as the API suggests. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net> 2017-02-06net: dsa: move netdevice notifier registrationVivien Didelot3-10/+26 Move the netdevice notifier block register code in slave.c and provide helpers for dsa.c to register and unregister it. At the same time, check for errors since (un)register_netdevice_notifier may fail. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net> 2017-02-06net/mlx5e: fix another maybe-uninitialized false-positiveArnd Bergmann