'ub' is malloced in tipc_udp_enable() and should be freed before
leaving from the error handling cases, otherwise it will cause
memory leak.

Fixes: ba5aa84a ("tipc: split UDP nl address parsing")
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If /sbin/bridge-stp is available on the system, bridge tries to execute
it instead of the kernel implementation when starting/stopping STP.

If anything goes wrong with /sbin/bridge-stp, bridge silently falls back
to kernel STP, making hard to debug userspace STP.

This patch adds a br_stp_call_user helper to start/stop userspace STP
and debug errors from the program: abnormal exit status is stored in the
lower byte and normal exit status is stored in higher byte.

Below is a simple example on a kernel with dynamic debug enabled:

    # ln -s /bin/false /sbin/bridge-stp
    # brctl stp br0 on
    br0: failed to start userspace STP (256)
    # dmesg
    br0: /sbin/bridge-stp exited with code 1
    br0: failed to start userspace STP (256)
    br0: using kernel STP
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.

Using the macro makes the code more readable by helping abstract away some
of the Kconfig built-in and module enable details.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.

Using the macro makes the code more readable by helping abstract away some
of the Kconfig built-in and module enable details.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.

Using the macro makes the code more readable by helping abstract away some
of the Kconfig built-in and module enable details.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: NAlexandre TORGUE <alexandre.torgue@st.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.

Using the macro makes the code more readable by helping abstract away some
of the Kconfig built-in and module enable details.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Acked-by: NDaniele Venzano <venza@brownhat.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.

Using the macro makes the code more readable by helping abstract away some
of the Kconfig built-in and module enable details.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Acked-by: NBert Kenward <bkenward@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.

Using the macro makes the code more readable by helping abstract away some
of the Kconfig built-in and module enable details.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.

Using the macro makes the code more readable by helping abstract away some
of the Kconfig built-in and module enable details.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.

Using the macro makes the code more readable by helping abstract away some
of the Kconfig built-in and module enable details.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.

Using the macro makes the code more readable by helping abstract away some
of the Kconfig built-in and module enable details.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.

Using the macro makes the code more readable by helping abstract away some
of the Kconfig built-in and module enable details.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.

Using the macro makes the code more readable by helping abstract away some
of the Kconfig built-in and module enable details.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.

Using the macro makes the code more readable by helping abstract away some
of the Kconfig built-in and module enable details.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.

Using the macro makes the code more readable by helping abstract away some
of the Kconfig built-in and module enable details.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.

Using the macro makes the code more readable by helping abstract away some
of the Kconfig built-in and module enable details.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The IS_ENABLED() macro checks if a Kconfig symbol has been enabled either
built-in or as a module, use that macro instead of open coding the same.

Using the macro makes the code more readable by helping abstract away some
of the Kconfig built-in and module enable details.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Conflicts:
	drivers/net/ethernet/mediatek/mtk_eth_soc.c
	drivers/net/ethernet/qlogic/qed/qed_dcbx.c
	drivers/net/phy/Kconfig

All conflicts were cases of overlapping commits.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Pull networking fixes from David Miller:
 "Mostly small sets of driver fixes scattered all over the place.

   1) Mediatek driver fixes from Sean Wang.  Forward port not written
      correctly during TX map, missed handling of EPROBE_DEFER, and
      mistaken use of put_page() instead of skb_free_frag().

   2) Fix socket double-free in KCM code, from WANG Cong.

   3) QED driver fixes from Sudarsana Reddy Kalluru, including a fix for
      using the dcbx buffers before initializing them.

   4) Mellanox Switch driver fixes from Jiri Pirko, including a fix for
      double fib removals and an error handling fix in
      mlxsw_sp_module_init().

   5) Fix kernel panic when enabling LLDP in i40e driver, from Dave
      Ertman.

   6) Fix padding of TSO packets in thunderx driver, from Sunil Goutham.

   7) TCP's rcv_wup not initialized properly when using fastopen, from
      Neal Cardwell.

   8) Don't use uninitialized flow keys in flow dissector, from Gao
      Feng.

   9) Use after free in l2tp module unload, from Sabrina Dubroca.

  10) Fix interrupt registry ordering issues in smsc911x driver, from
      Jeremy Linton.

  11) Fix crashes in bonding having to do with enslaving and rx_handler,
      from Mahesh Bandewar.

  12) AF_UNIX deadlock fixes from Linus.

  13) In mlx5 driver, don't read skb->xmit_mode after it might have been
      freed from the TX reclaim path.  From Tariq Toukan.

  14) Fix a bug from 2015 in TCP Yeah where the congestion window does
      not increase, from Artem Germanov.

  15) Don't pad frames on receive in NFP driver, from Jakub Kicinski.

  16) Fix chunk fragmenting in SCTP wrt. GSO, from Marcelo Ricardo
      Leitner.

  17) Fix deletion of VRF routes, from Mark Tomlinson.

  18) Fix device refcount leak when DAD fails in ipv6, from Wei Yongjun"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (101 commits)
  net/mlx4_en: Fix panic on xmit while port is down
  net/mlx4_en: Fixes for DCBX
  net/mlx4_en: Fix the return value of mlx4_en_dcbnl_set_state()
  net/mlx4_en: Fix the return value of mlx4_en_dcbnl_set_all()
  net: ethernet: renesas: sh_eth: add POST registers for rz
  drivers: net: phy: mdio-xgene: Add hardware dependency
  dwc_eth_qos: do not register semi-initialized device
  sctp: identify chunks that need to be fragmented at IP level
  mlxsw: spectrum: Set port type before setting its address
  mlxsw: spectrum_router: Fix error path in mlxsw_sp_router_init
  nfp: don't pad frames on receive
  nfp: drop support for old firmware ABIs
  nfp: remove linux/version.h includes
  tcp: cwnd does not increase in TCP YeAH
  net/mlx5e: Fix parsing of vlan packets when updating lro header
  net/mlx5e: Fix global PFC counters replication
  net/mlx5e: Prevent casting overflow
  net/mlx5e: Move an_disable_cap bit to a new position
  net/mlx5e: Fix xmit_more counter race issue
  tcp: fastopen: avoid negative sk_forward_alloc
  ...

Tariq Toukan says:

====================
mlx4 fixes

This patchset contains several bug fixes from the team to the
mlx4 Eth driver.

Series generated against net commit:
c2f57fb9 "drivers: net: phy: mdio-xgene: Add hardware dependency"

v2:
* excluded some cleanup patches.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When port is down, tx drop counter update is not needed.
Updating the counter in this case can cause a kernel
panic as when the port is down, ring can be NULL.

Fixes: 63a664b7 ("net/mlx4_en: fix tx_dropped bug")
Signed-off-by: NMoshe Shemesh <moshe@mellanox.com>
Signed-off-by: NTariq Toukan <tariqt@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch adds a capability check before enabling DCBX.
In addition, it re-organizes the relevant data structures,
and fixes a typo in a define.

Fixes: af7d5185 ("net/mlx4_en: Add DCB PFC support through CEE netlink commands")
Signed-off-by: NTariq Toukan <tariqt@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

mlx4_en_dcbnl_set_state() returns u8, the return value from
mlx4_en_setup_tc() could be negative in case of failure, so fix that.

Fixes: af7d5185 ("net/mlx4_en: Add DCB PFC support through CEE netlink commands")
Signed-off-by: NKamal Heib <kamalh@mellanox.com>
Signed-off-by: NTariq Toukan <tariqt@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

mlx4_en_dcbnl_set_all() returns u8, so return value can't be negative in
case of failure.

Fixes: af7d5185 ("net/mlx4_en: Add DCB PFC support through CEE netlink commands")
Signed-off-by: NKamal Heib <kamalh@mellanox.com>
Signed-off-by: NRana Shahout <ranas@mellanox.com>
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NTariq Toukan <tariqt@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

While migrating the bcm_sf2 driver to use b53_common, we left a small
piece untouched where we kept our local copy of the per-port
port_vlan_ctl bitmask value. This value is now maintained by b53_device
so we need to use it instead of our local (and now stale) copy of it.

Fixes: f458995b ("net: dsa: bcm_sf2: Utilize core B53 driver when possible")
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Commit aa719874 ("nvme: fabrics drivers don't need the nvme-pci
driver") removed the dependency on BLK_DEV_NVME, but the cdoe does
depend on the block layer (which used to be an implicit dependency
through BLK_DEV_NVME).

Otherwise you get various errors from the kbuild test robot random
config testing when that happens to hit a configuration with BLOCK
device support disabled.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Jay Freyensee <james_p_freyensee@linux.intel.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Pull IIO fixes from Greg KH:
 "Here are a few small IIO fixes for 4.8-rc6.

  Nothing major, full details are in the shortlog, all of these have
  been in linux-next with no reported issues"

* tag 'staging-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  iio:core: fix IIO_VAL_FRACTIONAL sign handling
  iio: ensure ret is initialized to zero before entering do loop
  iio: accel: kxsd9: Fix scaling bug
  iio: accel: bmc150: reset chip at init time
  iio: fix pressure data output unit in hid-sensor-attributes
  tools:iio:iio_generic_buffer: fix trigger-less mode

Pull USB fixes from Greg KH:
 "Here are some small USB gadget, phy, and xhci fixes for 4.8-rc6.

  All of these resolve minor issues that have been reported, and all
  have been in linux-next with no reported issues"

* tag 'usb-4.8-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: chipidea: udc: fix NULL ptr dereference in isr_setup_status_phase
  xhci: fix null pointer dereference in stop command timeout function
  usb: dwc3: pci: fix build warning on !PM_SLEEP
  usb: gadget: prevent potenial null pointer dereference on skb->len
  usb: renesas_usbhs: fix clearing the {BRDY,BEMP}STS condition
  usb: phy: phy-generic: Check clk_prepare_enable() error
  usb: gadget: udc: renesas-usb3: clear VBOUT bit in DRD_CON
  Revert "usb: dwc3: gadget: always decrement by 1"

David Ahern says:

====================
net: Convert vrf to tx hook

The motivation for this series is that ICMP Unreachable - Fragmentation
Needed packets are not handled properly for VRFs. Specifically, the
FIB lookup in __ip_rt_update_pmtu fails so no nexthop exception is
created with the reduced MTU. As a result connections stall if packets
larger than the smallest MTU in the path are generated.

While investigating that problem I also noticed that the MSS for all
connections in a VRF is based on the VRF device's MTU and not the
route the packets ultimately go through. VRF currently uses a dst
to direct packets to the device. The first FIB lookup returns this dst
and then the lookup in the VRF driver gets the actual output route. A
side effect of this design is that the VRF dst is cached on sockets
and then used for calculations like the MSS.

This series fixes this problem by removing the hook in the FIB lookups
that returns the dst pointing to the VRF device to the VRF and always
doing the actual FIB lookup. This allows the real dst to be used
throughout the stack (for example the MSS). Packets are diverted to
the VRF device on Tx using an l3mdev hook in the output path similar to
to what is done for Rx. The end result is a simpler implementation for
VRF with fewer intrusions into the network stack and symmetrical packet
handling for Rx and Tx paths.

Comparison of netperf performance for a build without l3mdev (best case
performance), the old vrf driver and the VRF driver from this series.
Data are collected using VMs with virtio + vhost. The netperf client
runs in the VM and netserver runs in the host. 1-byte RR tests are done
as these packets exaggerate the performance hit due to the extra lookups
done for l3mdev and VRF.

Command: netperf -cC -H ${ip} -l 60 -t {TCP,UDP}_RR [-J red]

                      TCP_RR              UDP_RR
                   IPv4     IPv6       IPv4     IPv6
no l3mdev        29,996   30,601     31,638   24,336
vrf old          27,417   27,626     29,159   24,801
vrf new          28,036   28,372     30,110   24,857
l3mdev, no vrf   29,534   30,465     30,670   24,346

 * Transactions per second as reported by netperf
 * netperf modified to take a bind-to-device argument -- the -J red option

1. 'no l3mdev'      == NET_L3_MASTER_DEV is unset so code is compiled out
2. 'vrf old'        == data for existing implementation
3. 'vrf new'        == data with this series
4. 'l3mdev, no vrf' == NET_L3_MASTER_DEV is enabled but traffic is not
                       going through a VRF

About the series
- patch 1 adds the flow update (changing oif or iif to L3 master device
  and setting the flag to skip the oif check) to ipv4 and ipv6 paths just
  before hitting the rules. This catches all code paths in a single spot.

- patch 2 adds the Tx hook to push the packet to the l3mdev if relevant

- patch 3 adds some checks so the vrf device can act as a vrf-local
  loopback. These changes were not needed before since the vrf dst was
  returned from the lookup.

- patches 4 and 5 flip the ipv4 and ipv6 stacks to the tx hook leaving
  the route lookup to be the real one. The dst flip happens at the
  beginning of the L3 output path so the VRFs can have device based
  features such as netfilter, tc and tcpdump.

- patches 6-11 remove no longer needed l3mdev code

v2
- properly handle IPv6 link scope addresses

- keep the device xmit path and associated dst which is switched in by
  the l3_out hook. packets still need to go through the xmit path in
  case the user puts a qdisc on the vrf device and to allow tc rules.
  version 1 short circuited the tx handling and only covered netfilter
  and tcpdump.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

No longer used
Signed-off-by: NDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

No longer used
Signed-off-by: NDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

No longer used
Signed-off-by: NDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

No longer needed
Signed-off-by: NDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

No longer needed
Signed-off-by: NDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

A previous patch added l3mdev flow update making these hooks
redundant. Remove them.
Signed-off-by: NDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Flip the IPv6 output path to use the l3mdev tx out hook. The VRF dst
is not returned on the first FIB lookup. Instead, the dst on the
skb is switched at the beginning of the IPv6 output processing to
send the packet to the VRF driver on xmit.

Link scope addresses (linklocal and multicast) need special handling:
specifically the oif the flow struct can not be changed because we
want the lookup tied to the enslaved interface. ie., the source address
and the returned route MUST point to the interface scope passed in.
Convert the existing vrf_get_rt6_dst to handle only link scope addresses.
Signed-off-by: NDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Flip the IPv4 output path to use the l3mdev tx out hook. The VRF dst
is not returned on the first FIB lookup. Instead, the dst on the
skb is switched at the beginning of the IPv4 output processing to
send the packet to the VRF driver on xmit.
Signed-off-by: NDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Allow an L3 master device to act as the loopback for that L3 domain.
For IPv4 the device can also have the address 127.0.0.1.
Signed-off-by: NDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch adds the infrastructure to the output path to pass an skb
to an l3mdev device if it has a hook registered. This is the Tx parallel
to l3mdev_ip{6}_rcv in the receive path and is the basis for removing
the existing hook that returns the vrf dst on the fib lookup.
Signed-off-by: NDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>