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2017-02-07net: wan: slic_ds26522: Use module_spi_driver to simplify the codeWei Yongjun1-12/+1
module_spi_driver() makes the code simpler by eliminating boilerplate code. Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07udp: properly cope with csum errorsEric Dumazet4-5/+11
Dmitry reported that UDP sockets being destroyed would trigger the WARN_ON(atomic_read(&sk->sk_rmem_alloc)); in inet_sock_destruct() It turns out we do not properly destroy skb(s) that have wrong UDP checksum. Thanks again to syzkaller team. Fixes : 7c13f97ffde6 ("udp: do fwd memory scheduling on dequeue") Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07ARM: orion: Register DSA switch as a MDIO deviceFlorian Fainelli9-36/+29
Utilize the ability to pass board specific MDIO bus information towards a particular MDIO device thus allowing us to provide the per-port switch layout to the Marvell 88E6XXX switch driver. Since we would end-up with conflicting registration paths, do not register the "dsa" platform device anymore. Note that the MDIO devices registered by code in net/dsa/dsa2.c does not parse a dsa_platform_data, but directly take a dsa_chip_data (specific to a single switch chip), so we update the different call sites to pass this structure down to orion_ge00_switch_init(). Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07net: phy: Allow pre-declaration of MDIO devicesFlorian Fainelli8-1/+145
Allow board support code to collect pre-declarations for MDIO devices by registering them with mdiobus_register_board_info(). SPI and I2C buses have a similar feature, we were missing this for MDIO devices, but this is particularly useful for e.g: MDIO-connected switches which need to provide their port layout (often board-specific) to a MDIO Ethernet switch driver. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07net: dsa: Add support for platform dataFlorian Fainelli2-18/+90
Allow drivers to use the new DSA API with platform data. Most of the code in net/dsa/dsa2.c does not rely so much on device_nodes and can get the same information from platform_data instead. We purposely do not support distributed configurations with platform data, so drivers should be providing a pointer to a 'struct dsa_chip_data' structure if they wish to communicate per-port layout. Multiple CPUs port could potentially be supported and dsa_chip_data is extended to receive up to one reference to an upstream network device per port described by a dsa_chip_data structure. dsa_dev_to_net_device() increments the network device's reference count, so we intentionally call dev_put() to be consistent with the DT-enabled path, until we have a generic notifier based solution. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07net: dsa: Rename and export dev_to_net_device()Florian Fainelli2-2/+4
In preparation for using this function in net/dsa/dsa2.c, rename the function to make its scope DSA specific, and export it. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07net: dsa: mv88e6xxx: Refactor remaining port setupAndrew Lunn4-34/+78
Move the remaining port configuration code which varies per device into port.c, using ops were necessary. This makes mv88e6xxx_6185_family() and mv88e6xxx_6095_family() unused, so remove them. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07net: dsa: mv88e6xxx: Implement Clause 45 access to SMI devicesAndrew Lunn2-9/+120
The mv88e6390 MDIO bus controllers can support for clause 45 accesses. The internal SERDES interfaces need this, and it is likely external 10GHz PHYs will be clause 45. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07net: dsa: mv88e6xxx: Set the CMODE for mv88e6390 ports 9 & 10Andrew Lunn4-0/+84
Unlike most ports, ports 9 and 10 of the 6390X family have configurable PHY modes. Set the mode as part of adjust_link(). Ordering is important, because the SERDES interfaces connected to ports 9 and 10 can be split and assigned to other ports. The CMODE has to be correctly set before the SERDES interface on another port can be configured. Such configuration is likely to be performed in port_enable() and port_disabled(), called on slave_open() and slave_close(). The simple case is port 9 and 10 are used for 'CPU' or 'DSA'. In this case, the CMODE is set via a phy-mode in dsa_cpu_dsa_setup(), which is called early in the switch setup. When ports 9 or 10 are used as user ports, and have a fixed-phy, when the fixed fixed-phy is attached, dsa_slave_adjust_link() is called, which results in the adjust_link function being called, setting the cmode. The port_enable() will for other ports will be called much later. When ports 9 or 10 are used as user ports and have a real phy attached which does not use all the available SERDES interface, e.g. a 1Gbps SGMII, there is currently no mechanism in place to set the CMODE of the port from software. It must be hoped the stripping resistors are correct. At the same time, add a function to get the cmode. This will be needed when configuring the SERDES interfaces. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07net: phy: Add 2000base-x, 2500base-x and rxaui modesAndrew Lunn2-0/+12
The mv88e6390 ports 9 and 10 supports some additional PHY modes. Add these modes to the PHY core so they can be used in the binding. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07catc: Use heap buffer for memory size testBen Hutchings1-7/+18
Allocating USB buffers on the stack is not portable, and no longer works on x86_64 (with VMAP_STACK enabled as per default). Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07catc: Combine failure cleanup code in catc_probe()Ben Hutchings1-16/+17
Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07rtl8150: Use heap buffers for all register accessBen Hutchings1-7/+27
Allocating USB buffers on the stack is not portable, and no longer works on x86_64 (with VMAP_STACK enabled as per default). Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07pegasus: Use heap buffers for all register accessBen Hutchings1-4/+25
Allocating USB buffers on the stack is not portable, and no longer works on x86_64 (with VMAP_STACK enabled as per default). Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") References: https://bugs.debian.org/852556 Reported-by: Lisandro Damián Nicanor Pérez Meyer <lisandro@debian.org> Tested-by: Lisandro Damián Nicanor Pérez Meyer <lisandro@debian.org> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07virtio_net: XDP support for adjust_headJohn Fastabend1-29/+125
Add support for XDP adjust head by allocating a 256B header region that XDP programs can grow into. This is only enabled when a XDP program is loaded. In order to ensure that we do not have to unwind queue headroom push queue setup below bpf_prog_add. It reads better to do a prog ref unwind vs another queue setup call. At the moment this code must do a full reset to ensure old buffers without headroom on program add or with headroom on program removal are not used incorrectly in the datapath. Ideally we would only have to disable/enable the RX queues being updated but there is no API to do this at the moment in virtio so use the big hammer. In practice it is likely not that big of a problem as this will only happen when XDP is enabled/disabled changing programs does not require the reset. There is some risk that the driver may either have an allocation failure or for some reason fail to correctly negotiate with the underlying backend in this case the driver will be left uninitialized. I have not seen this ever happen on my test systems and for what its worth this same failure case can occur from probe and other contexts in virtio framework. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07virtio_net: refactor freeze/restore logic into virtnet reset logicJohn Fastabend3-48/+73
For XDP we will need to reset the queues to allow for buffer headroom to be configured. In order to do this we need to essentially run the freeze()/restore() code path. Unfortunately the locking requirements between the freeze/restore and reset paths are different however so we can not simply reuse the code. This patch refactors the code path and adds a reset helper routine. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07virtio_net: remove duplicate queue pair binding in XDPJohn Fastabend1-13/+7
Factor out qp assignment. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07virtio_net: factor out xdp handler for readabilityJohn Fastabend1-51/+35
At this point the do_xdp_prog is mostly if/else branches handling the different modes of virtio_net. So remove it and handle running the program in the per mode handlers. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-07virtio_net: wrap rtnl_lock in test for calling with lock already heldJohn Fastabend1-10/+21
For XDP use case and to allow ethtool reset tests it is useful to be able to use reset paths from contexts where rtnl lock is already held. This requries updating virtnet_set_queues and free_receive_bufs the two places where rtnl_lock is taken in virtio_net. To do this we use the following pattern, _foo(...) { do stuff } foo(...) { rtnl_lock(); _foo(...); rtnl_unlock()}; this allows us to use freeze()/restore() flow from both contexts. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06bridge: fdb: write to used and updated at most once per jiffyNikolay Aleksandrov2-2/+4
Writing once per jiffy is enough to limit the bridge's false sharing. After this change the bridge doesn't show up in the local load HitM stats. Suggested-by: David S. Miller <davem@davemloft.net> Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06bridge: move write-heavy fdb members in their own cache lineNikolay Aleksandrov1-4/+6
Fdb's used and updated fields are written to on every packet forward and packet receive respectively. Thus if we are receiving packets from a particular fdb, they'll cause false-sharing with everyone who has looked it up (even if it didn't match, since mac/vid share cache line!). The "used" field is even worse since it is updated on every packet forward to that fdb, thus the standard config where X ports use a single gateway results in 100% fdb false-sharing. Note that this patch does not prevent the last scenario, but it makes it better for other bridge participants which are not using that fdb (and are only doing lookups over it). The point is with this move we make sure that only communicating parties get the false-sharing, in a later patch we'll show how to avoid that too. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06bridge: move to workqueue gcNikolay Aleksandrov10-23/+29
Move the fdb garbage collector to a workqueue which fires at least 10 milliseconds apart and cleans chain by chain allowing for other tasks to run in the meantime. When having thousands of fdbs the system is much more responsive. Most importantly remove the need to check if the matched entry has expired in __br_fdb_get that causes false-sharing and is completely unnecessary if we cleanup entries, at worst we'll get 10ms of traffic for that entry before it gets deleted. Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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>
2017-02-06macvtap: read vnet_hdr_size onceWillem de Bruijn1-2/+2
When IFF_VNET_HDR is enabled, a virtio_net header must precede data. Data length is verified to be greater than or equal to expected header length tun->vnet_hdr_sz before copying. Macvtap functions read the value once, but unless READ_ONCE is used, the compiler may ignore this and read multiple times. Enforce a single read and locally cached value to avoid updates between test and use. Signed-off-by: Willem de Bruijn <willemb@google.com> Suggested-by: Eric Dumazet <edumazet@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06tun: read vnet_hdr_sz onceWillem de Bruijn1-4/+6
When IFF_VNET_HDR is enabled, a virtio_net header must precede data. Data length is verified to be greater than or equal to expected header length tun->vnet_hdr_sz before copying. Read this value once and cache locally, as it can be updated between the test and use (TOCTOU). Signed-off-by: Willem de Bruijn <willemb@google.com> Reported-by: Dmitry Vyukov <dvyukov@google.com> CC: Eric Dumazet <edumazet@google.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06tcp: avoid infinite loop in tcp_splice_read()Eric Dumazet1-0/+6
Splicing from TCP socket is vulnerable when a packet with URG flag is received and stored into receive queue. __tcp_splice_read() returns 0, and sk_wait_data() immediately returns since there is the problematic skb in queue. This is a nice way to burn cpu (aka infinite loop) and trigger soft lockups. Again, this gem was found by syzkaller tool. Fixes: 9c55e01c0cc8 ("[TCP]: Splice receive support.") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: Dmitry Vyukov <dvyukov@google.com> Cc: Willy Tarreau <w@1wt.eu> 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>
2017-02-06net: 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 Bergmann1-2/+2
In commit abeffce ("net/mlx5e: Fix a -Wmaybe-uninitialized warning"), I fixed a gcc warning for the ipv4 offload handling. Now we get the same warning for the added ipv6 support: drivers/net/ethernet/mellanox/mlx5/core/en_tc.c:815:40: warning: 'out_dev' may be used uninitialized in this function [-Wmaybe-uninitialized] We can apply the same workaround here as well. Fixes: ce99f6b97fcd ("net/mlx5e: Support SRIOV TC encapsulation offloads for IPv6 tunnels") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Or Gerlitz <ogerlitz@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06net-next: treewide use is_vlan_dev() helper function.Parav Pandit14-35/+31
This patch makes use of is_vlan_dev() function instead of flag comparison which is exactly done by is_vlan_dev() helper function. Signed-off-by: Parav Pandit <parav@mellanox.com> Reviewed-by: Daniel Jurgens <danielj@mellanox.com> Acked-by: Stephen Hemminger <stephen@networkplumber.org> Acked-by: Jon Maxwell <jmaxwell37@gmail.com> Acked-by: Johannes Thumshirn <jth@kernel.org> Acked-by: Haiyang Zhang <haiyangz@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06hns: avoid stack overflow with CONFIG_KASANArnd Bergmann1-6/+2
The use of ACCESS_ONCE() looks like a micro-optimization to force gcc to use an indexed load for the register address, but it has an absolutely detrimental effect on builds with gcc-5 and CONFIG_KASAN=y, leading to a very likely kernel stack overflow aside from very complex object code: hisilicon/hns/hns_dsaf_gmac.c: In function 'hns_gmac_update_stats': hisilicon/hns/hns_dsaf_gmac.c:419:1: error: the frame size of 2912 bytes is larger than 1024 bytes [-Werror=frame-larger-than=] hisilicon/hns/hns_dsaf_ppe.c: In function 'hns_ppe_reset_common': hisilicon/hns/hns_dsaf_ppe.c:390:1: error: the frame size of 1184 bytes is larger than 1024 bytes [-Werror=frame-larger-than=] hisilicon/hns/hns_dsaf_ppe.c: In function 'hns_ppe_get_regs': hisilicon/hns/hns_dsaf_ppe.c:621:1: error: the frame size of 3632 bytes is larger than 1024 bytes [-Werror=frame-larger-than=] hisilicon/hns/hns_dsaf_rcb.c: In function 'hns_rcb_get_common_regs': hisilicon/hns/hns_dsaf_rcb.c:970:1: error: the frame size of 2784 bytes is larger than 1024 bytes [-Werror=frame-larger-than=] hisilicon/hns/hns_dsaf_gmac.c: In function 'hns_gmac_get_regs': hisilicon/hns/hns_dsaf_gmac.c:641:1: error: the frame size of 5728 bytes is larger than 1024 bytes [-Werror=frame-larger-than=] hisilicon/hns/hns_dsaf_rcb.c: In function 'hns_rcb_get_ring_regs': hisilicon/hns/hns_dsaf_rcb.c:1021:1: error: the frame size of 2208 bytes is larger than 1024 bytes [-Werror=frame-larger-than=] hisilicon/hns/hns_dsaf_main.c: In function 'hns_dsaf_comm_init': hisilicon/hns/hns_dsaf_main.c:1209:1: error: the frame size of 1904 bytes is larger than 1024 bytes [-Werror=frame-larger-than=] hisilicon/hns/hns_dsaf_xgmac.c: In function 'hns_xgmac_get_regs': hisilicon/hns/hns_dsaf_xgmac.c:748:1: error: the frame size of 4704 bytes is larger than 1024 bytes [-Werror=frame-larger-than=] hisilicon/hns/hns_dsaf_main.c: In function 'hns_dsaf_update_stats': hisilicon/hns/hns_dsaf_main.c:2420:1: error: the frame size of 1088 bytes is larger than 1024 bytes [-Werror=frame-larger-than=] hisilicon/hns/hns_dsaf_main.c: In function 'hns_dsaf_get_regs': hisilicon/hns/hns_dsaf_main.c:2753:1: error: the frame size of 10768 bytes is larger than 1024 bytes [-Werror=frame-larger-than=] This does not seem to happen any more with gcc-7, but removing the ACCESS_ONCE seems safe anyway and it avoids a serious issue for some people. I have verified that with gcc-5.3.1, the object code we get is better in the new version both with and without CONFIG_KASAN, as we no longer allocate a 1344 byte stack frame for hns_dsaf_get_regs() but otherwise have practically identical object code. With gcc-7.0.0, removing ACCESS_ONCE has no effect, the object code is already good either way. This patch is probably not urgent to get into 4.11 as only KASAN=y builds with certain compilers are affected, but I still think it makes sense to backport into older kernels. Cc: stable@vger.kernel.org Fixes: 511e6bc ("net: add Hisilicon Network Subsystem DSAF support") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06net/mlx4_en: fix a conditionDan Carpenter1-1/+1
There is a "||" vs "|" typo here so we test 0x1 instead of 0x6. Fixes: 1f8176f7352a ("net/mlx4_en: Check the enabling pptx/pprx flags in SET_PORT wrapper flow") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06sfc: don't rearm interrupts if busy pollingBert Kenward1-2/+2
Since commit 364b6055738b ("net: busy-poll: return busypolling status to drivers"), napi_complete_done() returns a boolean that can be used by drivers to conditionally rearm interrupts. Testing with a 7142 shows a small latency improvement of ~100 ns. Signed-off-by: Bert Kenward <bkenward@solarflare.com> Cc: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06sctp: process fwd tsn chunk only when prsctp is enabledXin Long1-0/+6
This patch is to check if asoc->peer.prsctp_capable is set before processing fwd tsn chunk, if not, it will return an ERROR to the peer, just as rfc3758 section 3.3.1 demands. Reported-by: Julian Cordes <julian.cordes@gmail.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06ipv6: Fix IPv6 packet loss in scenarios involving roaming + snooping switchesLinus Lüssing1-2/+8
When for instance a mobile Linux device roams from one access point to another with both APs sharing the same broadcast domain and a multicast snooping switch in between: 1) (c) <~~~> (AP1) <--[SSW]--> (AP2) 2) (AP1) <--[SSW]--> (AP2) <~~~> (c) Then currently IPv6 multicast packets will get lost for (c) until an MLD Querier sends its next query message. The packet loss occurs because upon roaming the Linux host so far stayed silent regarding MLD and the snooping switch will therefore be unaware of the multicast topology change for a while. This patch fixes this by always resending MLD reports when an interface change happens, for instance from NO-CARRIER to CARRIER state. Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06mlxsw: spectrum_router: Fix typo in commentIdo Schimmel1-1/+1
Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06mlxsw: spectrum_router: Don't read 'nud_state' without lockIdo Schimmel1-1/+1
We periodically ask the neighbouring system to try and resolve neighbours that are used for nexthops, but aren't currently resolved. However, 'nud_state' is protected by the neighbour lock, so we shouldn't access it without taking it. Instead, we can simply check the 'connected' field of the neighbour entry, which we update upon NEIGH_UPDATE events. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06mlxsw: spectrum_router: Remove redundant checkIdo Schimmel1-8/+4
We only add neighbour entries that are also used for nexthops to 'nexthop_neighs_list', so when iterating over this list there's no need to check that the entry is indeed used for nexthops. Remove the redundant check. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06net: remove ndo_neigh_{construct, destroy} from stacked devicesIdo Schimmel6-56/+0
In commit 18bfb924f000 ("net: introduce default neigh_construct/destroy ndo calls for L2 upper devices") we added these ndos to stacked devices such as team and bond, so that calls will be propagated to mlxsw. However, previous commit removed the reliance on these ndos and no new users of these ndos have appeared since above mentioned commit. We can therefore safely remove this dead code. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06mlxsw: spectrum_router: Simplify neighbour reflectionIdo Schimmel3-134/+135
Up until now we had two interfaces for neighbour related configuration: ndo_neigh_{construct,destroy} and NEIGH_UPDATE netevents. The ndos were used to add and remove neighbours from the driver's cache, whereas the netevent was used to reflect the neighbours into the device's tables. However, if the NUD state of a neighbour isn't NUD_VALID or if the neighbour is dead, then there's really no reason for us to keep it inside our cache. The only exception to this rule are neighbours that are also used for nexthops, which we periodically refresh to get them resolved. We can therefore eliminate the ndo entry point into the driver and simplify the code, making it similar to the FIB reflection, which is based solely on events. This also helps us avoid a locking issue, in which the RIF cache was traversed without proper locking during insertion into the neigh entry cache. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06mlxsw: spectrum_router: Remove unused variableIdo Schimmel1-2/+0
Since commit 33b1341cd1bf ("mlxsw: spectrum_router: Fix handling of neighbour structure") we no longer use destination IP for neighbour lookup, so remove it. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06mlxsw: spectrum_router: Use ordered workqueue for neigh updatesIdo Schimmel1-4/+4
We currently associate each neighbour entry with a work item, so it's not possible to have multiple events queued for the same neighbour entry. However, this is about to be changed so that the neighbour entry is only resolved when the work item is scheduled. The above can result in a mismatch between the kernel's and the device's neighbour table, unless the associated work items are processed in the order in which they were submitted. Do that by migrating the NEIGH_UPDATE work items to be processed in the ordered workqueue which was recently introduced in mlxsw in commit a3832b31898f ("mlxsw: core: Create an ordered workqueue for FIB offload"). Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06mlxsw: core: Queue work immediately instead of delaying itIdo Schimmel3-8/+8
We always use zero delay before queueing a work on the ordered workqueue ('mlxsw_owq'), so use work_struct directly instead of delayable work. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2017-02-06net/mlx5e: Bring back bfreg uar map dedicated pointerSaeed Mahameed2-2/+4
4K Uar series modified the mlx5e driver to use the new bfreg API, and mistakenly removed the sq->uar_map iomem data path dedicated pointer, which was meant to be read from xmit path for cache locality utilization. Fix that by returning that pointer to the SQ struct. Fixes: 7309cb4ad71e ("IB/mlx5: Support 4k UAR for libmlx5") Signed-off-by: Saeed Mahameed <saeedm@mellanox.com> Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
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