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  1. 20 10月, 2016 9 次提交
  3. 19 10月, 2016 14 次提交
    • E
      tcp: do not export sysctl_tcp_low_latency · 82454581
      由 Eric Dumazet 提交于 
      Since commit b2fb4f54 ("tcp: uninline tcp_prequeue()") we no longer
access sysctl_tcp_low_latency from a module.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      82454581
    • J
      rtnetlink: Add rtnexthop offload flag to compare mask · 85dda4e5
      由 Jiri Pirko 提交于 
      The offload flag is a status flag and should not be used by
FIB semantics for comparison.

Fixes: 37ed9493 ("rtnetlink: add RTNH_F_EXTERNAL flag for fib offload")
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Reviewed-by: NAndy Gospodarek <andy@greyhouse.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      85dda4e5
    • I
      switchdev: Execute bridge ndos only for bridge ports · 97c24290
      由 Ido Schimmel 提交于 
      We recently got the following warning after setting up a vlan device on
top of an offloaded bridge and executing 'bridge link':

WARNING: CPU: 0 PID: 18566 at drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c:81 mlxsw_sp_port_orig_get.part.9+0x55/0x70 [mlxsw_spectrum]
[...]
 CPU: 0 PID: 18566 Comm: bridge Not tainted 4.8.0-rc7 #1
 Hardware name: Mellanox Technologies Ltd. Mellanox switch/Mellanox switch, BIOS 4.6.5 05/21/2015
  0000000000000286 00000000e64ab94f ffff880406e6f8f0 ffffffff8135eaa3
  0000000000000000 0000000000000000 ffff880406e6f930 ffffffff8108c43b
  0000005106e6f988 ffff8803df398840 ffff880403c60108 ffff880406e6f990
 Call Trace:
  [<ffffffff8135eaa3>] dump_stack+0x63/0x90
  [<ffffffff8108c43b>] __warn+0xcb/0xf0
  [<ffffffff8108c56d>] warn_slowpath_null+0x1d/0x20
  [<ffffffffa01420d5>] mlxsw_sp_port_orig_get.part.9+0x55/0x70 [mlxsw_spectrum]
  [<ffffffffa0142195>] mlxsw_sp_port_attr_get+0xa5/0xb0 [mlxsw_spectrum]
  [<ffffffff816f151f>] switchdev_port_attr_get+0x4f/0x140
  [<ffffffff816f15d0>] switchdev_port_attr_get+0x100/0x140
  [<ffffffff816f15d0>] switchdev_port_attr_get+0x100/0x140
  [<ffffffff816f1d6b>] switchdev_port_bridge_getlink+0x5b/0xc0
  [<ffffffff816f2680>] ? switchdev_port_fdb_dump+0x90/0x90
  [<ffffffff815f5427>] rtnl_bridge_getlink+0xe7/0x190
  [<ffffffff8161a1b2>] netlink_dump+0x122/0x290
  [<ffffffff8161b0df>] __netlink_dump_start+0x15f/0x190
  [<ffffffff815f5340>] ? rtnl_bridge_dellink+0x230/0x230
  [<ffffffff815fab46>] rtnetlink_rcv_msg+0x1a6/0x220
  [<ffffffff81208118>] ? __kmalloc_node_track_caller+0x208/0x2c0
  [<ffffffff815f5340>] ? rtnl_bridge_dellink+0x230/0x230
  [<ffffffff815fa9a0>] ? rtnl_newlink+0x890/0x890
  [<ffffffff8161cf54>] netlink_rcv_skb+0xa4/0xc0
  [<ffffffff815f56f8>] rtnetlink_rcv+0x28/0x30
  [<ffffffff8161c92c>] netlink_unicast+0x18c/0x240
  [<ffffffff8161ccdb>] netlink_sendmsg+0x2fb/0x3a0
  [<ffffffff815c5a48>] sock_sendmsg+0x38/0x50
  [<ffffffff815c6031>] SYSC_sendto+0x101/0x190
  [<ffffffff815c7111>] ? __sys_recvmsg+0x51/0x90
  [<ffffffff815c6b6e>] SyS_sendto+0xe/0x10
  [<ffffffff817017f2>] entry_SYSCALL_64_fastpath+0x1a/0xa4

The problem is that the 8021q module propagates the call to
ndo_bridge_getlink() via switchdev ops, but the switch driver doesn't
recognize the netdev, as it's not offloaded.

While we can ignore calls being made to non-bridge ports inside the
driver, a better fix would be to push this check up to the switchdev
layer.

Note that these ndos can be called for non-bridged netdev, but this only
happens in certain PF drivers which don't call the corresponding
switchdev functions anyway.

Fixes: 99f44bb3 ("mlxsw: spectrum: Enable L3 interfaces on top of bridge devices")
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Reported-by: NTamir Winetroub <tamirw@mellanox.com>
Tested-by: NTamir Winetroub <tamirw@mellanox.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      97c24290
    • I
      net: core: Correctly iterate over lower adjacency list · e4961b07
      由 Ido Schimmel 提交于 
      Tamir reported the following trace when processing ARP requests received
via a vlan device on top of a VLAN-aware bridge:

 NMI watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [swapper/1:0]
[...]
 CPU: 1 PID: 0 Comm: swapper/1 Tainted: G        W       4.8.0-rc7 #1
 Hardware name: Mellanox Technologies Ltd. "MSN2100-CB2F"/"SA001017", BIOS 5.6.5 06/07/2016
 task: ffff88017edfea40 task.stack: ffff88017ee10000
 RIP: 0010:[<ffffffff815dcc73>]  [<ffffffff815dcc73>] netdev_all_lower_get_next_rcu+0x33/0x60
[...]
 Call Trace:
  <IRQ>
  [<ffffffffa015de0a>] mlxsw_sp_port_lower_dev_hold+0x5a/0xa0 [mlxsw_spectrum]
  [<ffffffffa016f1b0>] mlxsw_sp_router_netevent_event+0x80/0x150 [mlxsw_spectrum]
  [<ffffffff810ad07a>] notifier_call_chain+0x4a/0x70
  [<ffffffff810ad13a>] atomic_notifier_call_chain+0x1a/0x20
  [<ffffffff815ee77b>] call_netevent_notifiers+0x1b/0x20
  [<ffffffff815f2eb6>] neigh_update+0x306/0x740
  [<ffffffff815f38ce>] neigh_event_ns+0x4e/0xb0
  [<ffffffff8165ea3f>] arp_process+0x66f/0x700
  [<ffffffff8170214c>] ? common_interrupt+0x8c/0x8c
  [<ffffffff8165ec29>] arp_rcv+0x139/0x1d0
  [<ffffffff816e505a>] ? vlan_do_receive+0xda/0x320
  [<ffffffff815e3794>] __netif_receive_skb_core+0x524/0xab0
  [<ffffffff815e6830>] ? dev_queue_xmit+0x10/0x20
  [<ffffffffa06d612d>] ? br_forward_finish+0x3d/0xc0 [bridge]
  [<ffffffffa06e5796>] ? br_handle_vlan+0xf6/0x1b0 [bridge]
  [<ffffffff815e3d38>] __netif_receive_skb+0x18/0x60
  [<ffffffff815e3dc0>] netif_receive_skb_internal+0x40/0xb0
  [<ffffffff815e3e4c>] netif_receive_skb+0x1c/0x70
  [<ffffffffa06d7856>] br_pass_frame_up+0xc6/0x160 [bridge]
  [<ffffffffa06d63d7>] ? deliver_clone+0x37/0x50 [bridge]
  [<ffffffffa06d656c>] ? br_flood+0xcc/0x160 [bridge]
  [<ffffffffa06d7b14>] br_handle_frame_finish+0x224/0x4f0 [bridge]
  [<ffffffffa06d7f94>] br_handle_frame+0x174/0x300 [bridge]
  [<ffffffff815e3599>] __netif_receive_skb_core+0x329/0xab0
  [<ffffffff81374815>] ? find_next_bit+0x15/0x20
  [<ffffffff8135e802>] ? cpumask_next_and+0x32/0x50
  [<ffffffff810c9968>] ? load_balance+0x178/0x9b0
  [<ffffffff815e3d38>] __netif_receive_skb+0x18/0x60
  [<ffffffff815e3dc0>] netif_receive_skb_internal+0x40/0xb0
  [<ffffffff815e3e4c>] netif_receive_skb+0x1c/0x70
  [<ffffffffa01544a1>] mlxsw_sp_rx_listener_func+0x61/0xb0 [mlxsw_spectrum]
  [<ffffffffa005c9f7>] mlxsw_core_skb_receive+0x187/0x200 [mlxsw_core]
  [<ffffffffa007332a>] mlxsw_pci_cq_tasklet+0x63a/0x9b0 [mlxsw_pci]
  [<ffffffff81091986>] tasklet_action+0xf6/0x110
  [<ffffffff81704556>] __do_softirq+0xf6/0x280
  [<ffffffff8109213f>] irq_exit+0xdf/0xf0
  [<ffffffff817042b4>] do_IRQ+0x54/0xd0
  [<ffffffff8170214c>] common_interrupt+0x8c/0x8c

The problem is that netdev_all_lower_get_next_rcu() never advances the
iterator, thereby causing the loop over the lower adjacency list to run
forever.

Fix this by advancing the iterator and avoid the infinite loop.

Fixes: 7ce856aa ("mlxsw: spectrum: Add couple of lower device helper functions")
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Reported-by: NTamir Winetroub <tamirw@mellanox.com>
Reviewed-by: NJiri Pirko <jiri@mellanox.com>
Acked-by: NDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      e4961b07
    • E
      flow_dissector: Check skb for VLAN only if skb specified. · 3805a938
      由 Eric Garver 提交于 
      Fixes a panic when calling eth_get_headlen(). Noticed on i40e driver.

Fixes: d5709f7a ("flow_dissector: For stripped vlan, get vlan info from skb->vlan_tci")
Signed-off-by: NEric Garver <e@erig.me>
Reviewed-by: NJakub Sitnicki <jkbs@redhat.com>
Acked-by: NAmir Vadai <amir@vadai.me>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      3805a938
    • W
      qed: Use list_move_tail instead of list_del/list_add_tail · b4f0fd4b
      由 Wei Yongjun 提交于 
      Using list_move_tail() instead of list_del() + list_add_tail().
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Acked-by: NYuval Mintz <Yuval.Mintz@cavium.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      b4f0fd4b
    • A
      rocker: fix maybe-uninitialized warning · ecf244f7
      由 Arnd Bergmann 提交于 
      In some rare configurations, we get a warning about the 'index' variable
being used without an initialization:

drivers/net/ethernet/rocker/rocker_ofdpa.c: In function ‘ofdpa_port_fib_ipv4.isra.16.constprop’:
drivers/net/ethernet/rocker/rocker_ofdpa.c:2425:92: warning: ‘index’ may be used uninitialized in this function [-Wmaybe-uninitialized]

This is a false positive, the logic is just a bit too complex for gcc
to follow here. Moving the intialization of 'index' a little further
down makes it clear to gcc that the function always returns an error
if it is not initialized.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      ecf244f7
    • A
      net/hyperv: avoid uninitialized variable · 52ccd631
      由 Arnd Bergmann 提交于 
      The hdr_offset variable is only if we deal with a TCP or UDP packet,
but as the check surrounding its usage tests for skb_is_gso()
instead, the compiler has no idea if the variable is initialized
or not at that point:

drivers/net/hyperv/netvsc_drv.c: In function ‘netvsc_start_xmit’:
drivers/net/hyperv/netvsc_drv.c:494:42: error: ‘hdr_offset’ may be used uninitialized in this function [-Werror=maybe-uninitialized]

This adds an additional check for the transport type, which
tells the compiler that this path cannot happen. Since the
get_net_transport_info() function should always be inlined
here, I don't expect this to result in additional runtime
checks.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      52ccd631
    • A
      net: bcm63xx: avoid referencing uninitialized variable · 4b75ca5a
      由 Arnd Bergmann 提交于 
      gcc found a reference to an uninitialized variable in the error handling
of bcm_enet_open, introduced by a recent cleanup:

drivers/net/ethernet/broadcom/bcm63xx_enet.c: In function 'bcm_enet_open'
drivers/net/ethernet/broadcom/bcm63xx_enet.c:1129:2: warning: 'phydev' may be used uninitialized in this function [-Wmaybe-uninitialized]

This makes the use of that variable conditional, so we only reference it
here after it has been used before. Unlike my normal patches, I have not
build-tested this one, as I don't currently have mips test in my
randconfig setup.

Fixes: 625eb866 ("net: ethernet: broadcom: bcm63xx: use phydev from struct net_device")
Cc: Philippe Reynes <tremyfr@gmail.com>
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      4b75ca5a
    • E
      soreuseport: do not export reuseport_add_sock() · 41ee9c55
      由 Eric Dumazet 提交于 
      reuseport_add_sock() is not used from a module,
no need to export it.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      41ee9c55
    • T
      ibmvnic: Update MTU after device initialization · 87737f88
      由 Thomas Falcon 提交于 
      It is possible for the MTU to be changed during the initialization
process with the VNIC Server.  Ensure that the net device is updated
to reflect the new MTU.
Signed-off-by: NThomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      87737f88
    • T
      ibmvnic: Fix GFP_KERNEL allocation in interrupt context · 12608c26
      由 Thomas Falcon 提交于 
      Signed-off-by: NThomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      12608c26
    • T
      ibmvnic: Driver Version 1.0.1 · 9fa2f2cc
      由 Thomas Falcon 提交于 
      Increment driver version to reflect features that have
been added since release.
Signed-off-by: NThomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      9fa2f2cc
    • N
      bridge: multicast: restore perm router ports on multicast enable · 7cb3f921
      由 Nikolay Aleksandrov 提交于 
      Satish reported a problem with the perm multicast router ports not getting
reenabled after some series of events, in particular if it happens that the
multicast snooping has been disabled and the port goes to disabled state
then it will be deleted from the router port list, but if it moves into
non-disabled state it will not be re-added because the mcast snooping is
still disabled, and enabling snooping later does nothing.

Here are the steps to reproduce, setup br0 with snooping enabled and eth1
added as a perm router (multicast_router = 2):
1. $ echo 0 > /sys/class/net/br0/bridge/multicast_snooping
2. $ ip l set eth1 down
^ This step deletes the interface from the router list
3. $ ip l set eth1 up
^ This step does not add it again because mcast snooping is disabled
4. $ echo 1 > /sys/class/net/br0/bridge/multicast_snooping
5. $ bridge -d -s mdb show
<empty>

At this point we have mcast enabled and eth1 as a perm router (value = 2)
but it is not in the router list which is incorrect.

After this change:
1. $ echo 0 > /sys/class/net/br0/bridge/multicast_snooping
2. $ ip l set eth1 down
^ This step deletes the interface from the router list
3. $ ip l set eth1 up
^ This step does not add it again because mcast snooping is disabled
4. $ echo 1 > /sys/class/net/br0/bridge/multicast_snooping
5. $ bridge -d -s mdb show
router ports on br0: eth1

Note: we can directly do br_multicast_enable_port for all because the
querier timer already has checks for the port state and will simply
expire if it's in blocking/disabled. See the comment added by
commit 9aa66382 ("bridge: multicast: add a comment to
br_port_state_selection about blocking state")

Fixes: 561f1103 ("bridge: Add multicast_snooping sysfs toggle")
Reported-by: NSatish Ashok <sashok@cumulusnetworks.com>
Signed-off-by: NNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      7cb3f921
  5. 18 10月, 2016 16 次提交
  7. 17 10月, 2016 1 次提交