When e1000e_poll() is not fast enough to keep up with incoming traffic, the
adapter (when operating in msix mode) raises the Other interrupt to signal
Receiver Overrun.

This is a double problem because 1) at the moment e1000_msix_other()
assumes that it is only called in case of Link Status Change and 2) if the
condition persists, the interrupt is repeatedly raised again in quick
succession.

Ideally we would configure the Other interrupt to not be raised in case of
receiver overrun but this doesn't seem possible on this adapter. Instead,
we handle the first part of the problem by reverting to the practice of
reading ICR in the other interrupt handler, like before commit 16ecba59
("e1000e: Do not read ICR in Other interrupt"). Thanks to commit
0a8047ac ("e1000e: Fix msi-x interrupt automask") which cleared IAME
from CTRL_EXT, reading ICR doesn't interfere with RxQ0, TxQ0 interrupts
anymore. We handle the second part of the problem by not re-enabling the
Other interrupt right away when there is overrun. Instead, we wait until
traffic subsides, napi polling mode is exited and interrupts are
re-enabled.
Reported-by: NLennart Sorensen <lsorense@csclub.uwaterloo.ca>
Fixes: 16ecba59 ("e1000e: Do not read ICR in Other interrupt")
Signed-off-by: NBenjamin Poirier <bpoirier@suse.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Lennart reported the following race condition:

\ e1000_watchdog_task
    \ e1000e_has_link
        \ hw->mac.ops.check_for_link() === e1000e_check_for_copper_link
            /* link is up */
            mac->get_link_status = false;

                            /* interrupt */
                            \ e1000_msix_other
                                hw->mac.get_link_status = true;

        link_active = !hw->mac.get_link_status
        /* link_active is false, wrongly */

This problem arises because the single flag get_link_status is used to
signal two different states: link status needs checking and link status is
down.

Avoid the problem by using the return value of .check_for_link to signal
the link status to e1000e_has_link().
Reported-by: NLennart Sorensen <lsorense@csclub.uwaterloo.ca>
Signed-off-by: NBenjamin Poirier <bpoirier@suse.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

All the helpers return -E1000_ERR_PHY.
Signed-off-by: NBenjamin Poirier <bpoirier@suse.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Reading e1000e_check_for_copper_link() shows that get_link_status is set to
false after link has been detected. Therefore, it stays TRUE until then.
Signed-off-by: NBenjamin Poirier <bpoirier@suse.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

In case of error from e1e_rphy(), the loop will exit early and "success"
will be set to true erroneously.
Signed-off-by: NBenjamin Poirier <bpoirier@suse.com>
Tested-by: NAaron Brown <aaron.f.brown@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Signed-off-by: NBernd Edlinger <bernd.edlinger@hotmail.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Vhost-net has a hard limit on the number of zerocopy skbs in flight.
When reached, transmission stalls. Stalls cause latency, as well as
head-of-line blocking of other flows that do not use zerocopy.

Instead of stalling, revert to copy-based transmission.

Tested by sending two udp flows from guest to host, one with payload
of VHOST_GOODCOPY_LEN, the other too small for zerocopy (1B). The
large flow is redirected to a netem instance with 1MBps rate limit
and deep 1000 entry queue.

  modprobe ifb
  ip link set dev ifb0 up
  tc qdisc add dev ifb0 root netem limit 1000 rate 1MBit

  tc qdisc add dev tap0 ingress
  tc filter add dev tap0 parent ffff: protocol ip \
      u32 match ip dport 8000 0xffff \
      action mirred egress redirect dev ifb0

Before the delay, both flows process around 80K pps. With the delay,
before this patch, both process around 400. After this patch, the
large flow is still rate limited, while the small reverts to its
original rate. See also discussion in the first link, below.

Without rate limiting, {1, 10, 100}x TCP_STREAM tests continued to
send at 100% zerocopy.

The limit in vhost_exceeds_maxpend must be carefully chosen. With
vq->num >> 1, the flows remain correlated. This value happens to
correspond to VHOST_MAX_PENDING for vq->num == 256. Allow smaller
fractions and ensure correctness also for much smaller values of
vq->num, by testing the min() of both explicitly. See also the
discussion in the second link below.

Changes
  v1 -> v2
    - replaced min with typed min_t
    - avoid unnecessary whitespace change

Link:http://lkml.kernel.org/r/CAF=yD-+Wk9sc9dXMUq1+x_hh=3ThTXa6BnZkygP3tgVpjbp93g@mail.gmail.com
Link:http://lkml.kernel.org/r/20170819064129.27272-1-den@klaipeden.comSigned-off-by: NWillem de Bruijn <willemb@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add erspan netlink interface for OVS.
Signed-off-by: NWilliam Tu <u9012063@gmail.com>
Cc: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Switch the DO_ONCE() macro from the deprecated jump label API to the new
one.  The new one is more readable, and for DO_ONCE() it also makes the
generated code more icache-friendly: now the one-time initialization
code is placed out-of-line at the jump target, rather than at the inline
fallthrough case.
Acked-by: NHannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: NEric Biggers <ebiggers@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch replaces rcu_deference() with rcu_dereference_bh() in
ipv6_route_seq_next() to avoid the following warning:

[   19.431685] WARNING: suspicious RCU usage
[   19.433451] 4.14.0-rc3-00914-g66f5d6ce #118 Not tainted
[   19.435509] -----------------------------
[   19.437267] net/ipv6/ip6_fib.c:2259 suspicious
rcu_dereference_check() usage!
[   19.440790]
[   19.440790] other info that might help us debug this:
[   19.440790]
[   19.444734]
[   19.444734] rcu_scheduler_active = 2, debug_locks = 1
[   19.447757] 2 locks held by odhcpd/3720:
[   19.449480]  #0:  (&p->lock){+.+.}, at: [<ffffffffb1231f7d>]
seq_read+0x3c/0x333
[   19.452720]  #1:  (rcu_read_lock_bh){....}, at: [<ffffffffb1d2b984>]
ipv6_route_seq_start+0x5/0xfd
[   19.456323]
[   19.456323] stack backtrace:
[   19.458812] CPU: 0 PID: 3720 Comm: odhcpd Not tainted
4.14.0-rc3-00914-g66f5d6ce #118
[   19.462042] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.10.2-1 04/01/2014
[   19.465414] Call Trace:
[   19.466788]  dump_stack+0x86/0xc0
[   19.468358]  lockdep_rcu_suspicious+0xea/0xf3
[   19.470183]  ipv6_route_seq_next+0x71/0x164
[   19.471963]  seq_read+0x244/0x333
[   19.473522]  proc_reg_read+0x48/0x67
[   19.475152]  ? proc_reg_write+0x67/0x67
[   19.476862]  __vfs_read+0x26/0x10b
[   19.478463]  ? __might_fault+0x37/0x84
[   19.480148]  vfs_read+0xba/0x146
[   19.481690]  SyS_read+0x51/0x8e
[   19.483197]  do_int80_syscall_32+0x66/0x15a
[   19.484969]  entry_INT80_compat+0x32/0x50
[   19.486707] RIP: 0023:0xf7f0be8e
[   19.488244] RSP: 002b:00000000ffa75d04 EFLAGS: 00000246 ORIG_RAX:
0000000000000003
[   19.491431] RAX: ffffffffffffffda RBX: 0000000000000009 RCX:
0000000008056068
[   19.493886] RDX: 0000000000001000 RSI: 0000000008056008 RDI:
0000000000001000
[   19.496331] RBP: 00000000000001ff R08: 0000000000000000 R09:
0000000000000000
[   19.498768] R10: 0000000000000000 R11: 0000000000000000 R12:
0000000000000000
[   19.501217] R13: 0000000000000000 R14: 0000000000000000 R15:
0000000000000000

Fixes: 66f5d6ce ("ipv6: replace rwlock with rcu and spinlock in fib6_table")
Reported-by: NXiaolong Ye <xiaolong.ye@intel.com>
Signed-off-by: NWei Wang <weiwan@google.com>
Acked-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Merge powerpc transactional memory fixes from Michael Ellerman:
 "I figured I'd still send you the commits using a bundle to make sure
  it works in case I need to do it again in future"

This fixes transactional memory state restore for powerpc.

* bundle'd patches from Michael Ellerman:
  powerpc/tm: Fix illegal TM state in signal handler
  powerpc/64s: Use emergency stack for kernel TM Bad Thing program checks

Jeff Kirsher says:

====================
40GbE Intel Wired LAN Driver Updates 2017-10-09

This series contains updates to i40e and i40evf only.

Jake fixes missed flag conversion from u64 to u32.  Fixes a deafult ITR
value issue where the driver defaults to an ITR value of half the
expected value (in terms of minimum microseconds between interrupts).  So
fix this by changing the default values to be calculated using the
ITR_REG_TO_USEC() macro which indicates that we are converting from the
register units into microseconds. Updates the drivers to bump the tail in
increments of 8 and double the number of descriptors we will bundle into
one tail bump when receiving.  With the recent kernel support for
enabling XPS and QoS at the same time, we no longer need to worry about
the number of traffic classes when enabling XPS.

Lihong converts the use of hash_for_each() to hash_for_each_safe() to
safely remove a hash entry.  Adds a check for the return value for
find_first_bit() in the case that it returns the size passed to search.

Alan fixes a bug in which filters are erroneously removed if they are
removed and then added again.  So make sure that when adding a filter, if
we find it already existed in our list, make sure it is not marked to be
removed.

Jayaprakash adds the retrying of PHY reads when the I2C is busy for a
maximum period of 500ms.

Rami fixes code comment typo.

Stefano Brivio simplifies the code by removing the use of a local
return code variable and simply return the results of the read function.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Jeff Kirsher says:

====================
10GbE Intel Wired LAN Driver Updates 2017-10-09

This series contains updates to ixgbe only.

Emil fixes an issue where the semaphore bits could be stuck after a reset
or a crash, by adding the clearing of software resource bits in the
software/firmware synchronization register.  Added error checks when we
attempt to identify and initialize the PHY to prevent a crash.  Fixed a
few issues in the logic of ixgbe_clean_test_rings() which was exposed by
a previous commit that was causing a crash in ethtool diagnostics.

Bhumika Goyal fixes a couple of instances which were overlooked when we
made ixgbe_mac_operations constant.

Shannon Nelson fixes an issue to restore normal operations after the
last MACVLAN offload is removed, otherwise we get stuck in a single queue
operations.

The infamous Jesper Dangaard Brouer adds a counter which counts the
number of times the recycle fails and the real page allocator is invoked.

Alex updates the adaptive ITR algorithm to better support the needs of the
network.  This attempt to make it so that our ITR algorithm will try to
prevent either starving a socket buffer for memory in the case of
transmit, or overrunning an receive socket buffer on receive.  We should
function better with new features like XDP which can handle small packets
at high rates without needing to lock us into NAPI polling mode.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Pull networking fixes from David Miller:

 1) Fix object leak on IPSEC offload failure, from Steffen Klassert.

 2) Fix range checks in ipset address range addition operations, from
    Jozsef Kadlecsik.

 3) Fix pernet ops unregistration order in ipset, from Florian Westphal.

 4) Add missing netlink attribute policy for nl80211 packet pattern
    attrs, from Peng Xu.

 5) Fix PPP device destruction race, from Guillaume Nault.

 6) Write marks get lost when BPF verifier processes R1=R2 register
    assignments, causing incorrect liveness information and less state
    pruning. Fix from Alexei Starovoitov.

 7) Fix blockhole routes so that they are marked dead and therefore not
    cached in sockets, otherwise IPSEC stops working. From Steffen
    Klassert.

 8) Fix broadcast handling of UDP socket early demux, from Paolo Abeni.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (37 commits)
  cdc_ether: flag the u-blox TOBY-L2 and SARA-U2 as wwan
  net: thunderx: mark expected switch fall-throughs in nicvf_main()
  udp: fix bcast packet reception
  netlink: do not set cb_running if dump's start() errs
  ipv4: Fix traffic triggered IPsec connections.
  ipv6: Fix traffic triggered IPsec connections.
  ixgbe: incorrect XDP ring accounting in ethtool tx_frame param
  net: ixgbe: Use new PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag
  Revert commit 1a8b6d76 ("net:add one common config...")
  ixgbe: fix masking of bits read from IXGBE_VXLANCTRL register
  ixgbe: Return error when getting PHY address if PHY access is not supported
  netfilter: xt_bpf: Fix XT_BPF_MODE_FD_PINNED mode of 'xt_bpf_info_v1'
  netfilter: SYNPROXY: skip non-tcp packet in {ipv4, ipv6}_synproxy_hook
  tipc: Unclone message at secondary destination lookup
  tipc: correct initialization of skb list
  gso: fix payload length when gso_size is zero
  mlxsw: spectrum_router: Avoid expensive lookup during route removal
  bpf: fix liveness marking
  doc: Fix typo "8023.ad" in bonding documentation
  ipv6: fix net.ipv6.conf.all.accept_dad behaviour for real
  ...

The u-blox TOBY-L2 is a LTE Cat 4 module with HSPA+ and 2G fallback.
This module allows switching to different USB profiles with the
'AT+UUSBCONF' command, and provides a ECM network interface when the
'AT+UUSBCONF=2' profile is selected.

The u-blox SARA-U2 is a HSPA module with 2G fallback. The default USB
configuration includes a ECM network interface.

Both these modules are controlled via AT commands through one of the
TTYs exposed. Connecting these modules may be done just by activating
the desired PDP context with 'AT+CGACT=1,<cid>' and then running DHCP
on the ECM interface.
Signed-off-by: NAleksander Morgado <aleksander@aleksander.es>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fixes: 09f79fd4 ("i40e: avoid NVM acquire deadlock during NVM update")
Signed-off-by: NStefano Brivio <sbrivio@redhat.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch fixes a typo in i40e_vsi_alloc_arrays() documentation.
The first parameter name should be "vsi" instead of "type".
Signed-off-by: NRami Rosen <rami.rosen@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The computed result of I40E_MAX_VSI_QP * I40E_VIRTCHNL_SUPPORTED_QTYPES
is used more than three times in function i40e_config_irq_link_list.
Simply declare a local variable to store it to improve readability.
Signed-off-by: NLihong Yang <lihong.yang@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

- When the I2C is busy, the PHY reads are delayed.  The firmware will
  return EGAIN in these cases with an expectation that the SW will
  trigger the reads again
- This patch retries the operation for a maximum period of 500ms
Signed-off-by: NJayaprakash Shanmugam <jayaprakash.shanmugam@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The find_first_bit function will return the size passed to search
if the first set bit is not found. This patch adds the check in case
that happens as the return value would be used as the index in an array
and that would have caused the out-of-bounds access.

Detected by CoverityScan, CID 1295969 Out-of-bounds access
Signed-off-by: NLihong Yang <lihong.yang@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Recently, the kernel gained support for enabling XPS and QoS at the
same time. Thus, we no longer need to worry about the number of
traffic classes when enabling XPS.
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Double the number of descriptors we'll bundle into one tail bump when
receiving. Empirical testing has shown that we reduce CPU utilization
and don't appear to reduce throughput or packet rate. 32 seems to be the
sweet spot, as it's half the default polling budget, so we'd essentially
reduce from 4 tail writes when polling down to 2. Increasing this up to
64 appears to have negative impacts as it may become possible that we
don't bump the tail each time we get polled, which could cause a long
delay between returning descriptors to the hardware.
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Hardware only fetches descriptors on cachelines of 8, essentially
ignoring the lower 3 bits of the tail register. Thus, it is pointless to
bump tail by an unaligned access as the hardware will ignore some of the
new descriptors we allocated. Thus, it's ideal if we can ensure tail
writes are always aligned to 8.

At first, it seems like we'd already do this, since we allocate
descriptors in batches which are a multiple of 8. Since we'd always
increment by a multiple of 8, it seems like the value should always be
aligned.

However, this ignores allocation failures. If we fail to allocate
a buffer, our tail register will become unaligned. Once it has become
unaligned it will essentially be stuck unaligned until a buffer
allocation happens to fail at the exact amount necessary to re-align it.

We can do better, by simply rounding down the number of buffers we're
about to allocate (cleaned_count) such that "next_to_clean
+ cleaned_count" is rounded to the nearest multiple of 8.

We do this by calculating how far off that value is and subtracting it
from the cleaned_count. This essentially defers allocation of buffers if
they're going to be ignored by hardware anyways, and re-aligns our
next_to_use and tail values after a failure to allocate a descriptor.

This calculation ensures that we always align the tail writes in a way
the hardware expects and don't unnecessarily allocate buffers which
won't be fetched immediately.
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The lrxq thresh value tells hardware to immediately interrupt when there
are fewer than N*64 packets left in the ring.

Counter intuitively, empirical testing has shown that decreasing this
value from 2 to 1, and thus changing from an immediate interrupt at
fewer than 128 descriptors down to 64 descriptors causes a small
increase in the maximum total packets per second we can receive. This
increase occurs even when we're polling with interrupts masked, as the
hardware must still handle interrupts internally even if we've disabled
them in software.

Also reduce the value for any VFs we allocate.
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

In the past we changed driver behavior to not clear the PBA when
re-enabling interrupts. This change was motivated by the flawed belief
that clearing the PBA would cause a lost interrupt if a receive
interrupt occurred while interrupts were disabled.

According to empirical testing this isn't the case. Additionally, the
data sheet specifically says that we should set the CLEARPBA bit when
re-enabling interrupts in a polling setup.

This reverts commit 40d72a50 ("i40e/i40evf: don't lose interrupts")
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

The ITR register expects to be programmed in units of 2 microseconds.
Because of this, all of the drivers I40E_ITR_* constants are in terms of
this 2 microsecond register.

Unfortunately, the rx_itr_default value is expected to be programmed in
microseconds.

Effectively the driver defaults to an ITR value of half the expected
value (in terms of minimum microseconds between interrupts).

Fix this by changing the default values to be calculated using
ITR_REG_TO_USEC macro which indicates that we're converting from the
register units into microseconds.
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Due to the asynchronous nature in which mac filters are added and
deleted, there exists a bug in which filters are erroneously removed if
removed then added again quickly.

The events are as such:
    - filter marked for removal
    - same filter is re-added before watchdog that cleans up filters
    - we skip re-adding the filter because we have it already in the
list
    - watchdog filter cleanup kicks off and filter is removed

So when we were re-adding the same filter, it didn't actually get added
because it already existed in the list, but was marked for removal and
had yet to actually be removed.

This patch fixes the issue by making sure that when adding a filter, if
we find it already existing in our list, make sure it is not marked to
be removed.
Signed-off-by: NAlan Brady <alan.brady@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

This patch replaces hash_for_each function with hash_for_each_safe
when calling  __i40e_del_filter. The hash_for_each_safe function is
the right one to use when iterating over a hash table to safely remove
a hash entry. Otherwise, incorrect values may be read from freed memory.

Detected by CoverityScan, CID 1402048 Read from pointer after free
Signed-off-by: NLihong Yang <lihong.yang@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Since we don't yet have more than 32 flags, we'll use a u32 for both the
hw_features and flag field. Should we gain more flags in the future, we
may need to convert to a u64 or separate flags out into two fields.

This was overlooked in the previous commit 2781de2134c4 ("i40e/i40evf:
organize and re-number feature flags"), where the feature flag was not
converted form u64 to u32.
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Reviewed-by: NMitch Williams <mitch.a.williams@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

Pull NFS client bugfixes from Trond Myklebust:
 "Hightlights include:

  stable fixes:
   - nfs/filelayout: fix oops when freeing filelayout segment
   - NFS: Fix uninitialized rpc_wait_queue

  bugfixes:
   - NFSv4/pnfs: Fix an infinite layoutget loop
   - nfs: RPC_MAX_AUTH_SIZE is in bytes"

* tag 'nfs-for-4.14-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFSv4/pnfs: Fix an infinite layoutget loop
  nfs/filelayout: fix oops when freeing filelayout segment
  sunrpc: remove redundant initialization of sock
  NFS: Fix uninitialized rpc_wait_queue
  NFS: Cleanup error handling in nfs_idmap_request_key()
  nfs: RPC_MAX_AUTH_SIZE is in bytes

Eric Dumazet says:

====================
ipv6: addrlabel: avoid dirtying ip6addrlbl_entry

The refcount on ip6addrlbl_entry is only used to make sure ip6addrlbl_entry
does not disappear while ip6addrlbl_get() is allocating an skb.

We can instead allocate skb first, then use RCU, so that we no longer need
to refcount these structures.
====================
Acked-by: NMartin KaFai Lau <kafai@fb.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

After previous patch ("ipv6: addrlabel: rework ip6addrlbl_get()")
we can remove the refcount from struct ip6addrlbl_entry,
since it is no longer elevated in p6addrlbl_get()
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If we allocate skb before the lookup, we can use RCU
without the need of ip6addrlbl_hold()

This means that the following patch can get rid of refcounting.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Cc: Sunil Goutham <sgoutham@cavium.com>
Cc: Robert Richter <rric@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: netdev@vger.kernel.org
Signed-off-by: NGustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Pablo Neira Ayuso says:

====================
Netfilter/IPVS fixes for net

The following patchset contains Netfilter/IPVS fixes for your net tree,
they are:

1) Fix packet drops due to incorrect ECN handling in IPVS, from Vadim
   Fedorenko.

2) Fix splat with mark restoration in xt_socket with non-full-sock,
   patch from Subash Abhinov Kasiviswanathan.

3) ipset bogusly bails out when adding IPv4 range containing more than
   2^31 addresses, from Jozsef Kadlecsik.

4) Incorrect pernet unregistration order in ipset, from Florian Westphal.

5) Races between dump and swap in ipset results in BUG_ON splats, from
   Ross Lagerwall.

6) Fix chain renames in nf_tables, from JingPiao Chen.

7) Fix race in pernet codepath with ebtables table registration, from
   Artem Savkov.

8) Memory leak in error path in set name allocation in nf_tables, patch
   from Arvind Yadav.

9) Don't dump chain counters if they are not available, this fixes a
   crash when listing the ruleset.

10) Fix out of bound memory read in strlcpy() in x_tables compat code,
    from Eric Dumazet.

11) Make sure we only process TCP packets in SYNPROXY hooks, patch from
    Lin Zhang.

12) Cannot load rules incrementally anymore after xt_bpf with pinned
    objects, added in revision 1. From Shmulik Ladkani.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2017-10-09

This series contains updates to ixgbe and arch/Kconfig.

Mark fixes a case where PHY register access is not supported and we were
returning a PHY address, when we should have been returning -EOPNOTSUPP.

Sabrina Dubroca fixes the use of a logical "and" when it should have been
the bitwise "and" operator.

Ding Tianhong reverts the commit that added the Kconfig bool option
ARCH_WANT_RELAX_ORDER, since there is now a new flag
PCI_DEV_FLAGS_NO_RELAXED_ORDERING that has been added to indicate that
Relaxed Ordering Attributes should not be used for Transaction Layer
Packets.  Then follows up with making the needed changes to ixgbe to
use the new PCI_DEV_FLAGS_NO_RELAXED_ORDERING flag.

John Fastabend fixes an issue in the ring accounting when the transmit
ring parameters are changed via ethtool when an XDP program is attached.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Tariq Toukan says:

====================
Fix mlx4 static checker warnings

This patchset contains fixes for static checker warnings
in the mlx4 Core and Eth drivers.

Patch 1 fixes an actual bug discovered by the checker.
Patches 2 and 3 fix the warnings without functional changes.

Series generated against net-next commit:
c49c777f qed: Delete redundant check on dcb_app priority
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In TX data-path, we intentionally do not byte-swap, as documented
in code and in the cited commit log.
This fixes sparse warning:
en_tx.c:720:23: warning: incorrect type in argument 1 (different base types)
en_tx.c:720:23:    expected unsigned int [unsigned] [usertype] <noident>
en_tx.c:720:23:    got restricted __be32 [usertype] doorbell_qpn

Fixes: 492f5add ("net/mlx4_en: Doorbell is byteswapped in Little Endian archs")
Signed-off-by: NTariq Toukan <tariqt@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fix the following SPARSE warning, in MLX4_GET() macro:
drivers/net/ethernet/mellanox/mlx4/fw.c:233:9: warning: cast to restricted __be64

Fixes: 17d5ceb6 ("net/mlx4_core: Fix unaligned accesses")
Signed-off-by: NTariq Toukan <tariqt@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>