SCTP will try to access original IP headers on sctp_recvmsg in order to
copy the addresses used. There are also other places that do similar access
to IP or even SCTP headers. But after 90017acc ("sctp: Add GSO
support") they aren't always there because they are only present in the
header skb.

SCTP handles the queueing of incoming data by cloning the incoming skb
and limiting to only the relevant payload. This clone has its cb updated
to something different and it's then queued on socket rx queue. Thus we
need to fix this in two moments.

For rx path, not related to socket queue yet, this patch uses a
partially copied sctp_input_cb to such GSO frags. This restores the
ability to access the headers for this part of the code.

Regarding the socket rx queue, it removes iif member from sctp_event and
also add a chunk pointer on it.

With these changes we're always able to reach the headers again.

The biggest change here is that now the sctp_chunk struct and the
original skb are only freed after the application consumed the buffer.
Note however that the original payload was already like this due to the
skb cloning.

For iif, SCTP's IPv4 code doesn't use it, so no change is necessary.
IPv6 now can fetch it directly from original's IPv6 CB as the original
skb is still accessible.

In the future we probably can simplify sctp_v*_skb_iif() stuff, as
sctp_v4_skb_iif() was called but it's return value not used, and now
it's not even called, but such cleanup is out of scope for this change.

Fixes: 90017acc ("sctp: Add GSO support")
Signed-off-by: NMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The next patch needs 8 bytes in there. sctp_ulpevent has a hole due to
bad alignment; msg_flags is using 4 bytes while it actually uses only 2, so
we shrink it, and iif member (4 bytes) which can be easily fetched from
another place once the next patch is there, so we remove it and thus
creating space for 8 bytes.
Signed-off-by: NMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

We process input path in other files too and having access to it is
nice, so move it to a header where it's shared.
Signed-off-by: NMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

There is a error message within devm_ioremap_resource
already, so remove the dev_err call to avoid redundant
error message.
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

There is a error message within devm_ioremap_resource
already, so remove the dev_err call to avoid redundant
error message.
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Comments from Frank Kellerman on last doc update:
- extra whitespace in front of a neigh show command
- convert the brief link example to 'vrf red'
Signed-off-by: NDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next

Johan Hedberg says:

====================
pull request: bluetooth-next 2016-07-13

Here's our main bluetooth-next pull request for the 4.8 kernel:

 - Fixes and cleanups in 802.15.4 and 6LoWPAN code
 - Fix out of bounds issue in btmrvl driver
 - Fixes to Bluetooth socket recvmsg return values
 - Use crypto_cipher_encrypt_one() instead of crypto_skcipher
 - Cleanup of Bluetooth connection sysfs interface
 - New Authentication failure reson code for Disconnected mgmt event
 - New USB IDs for Atheros, Qualcomm and Intel Bluetooth controllers

Please let me know if there are any issues pulling. Thanks.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Update vrf documentation for changes made to 4.4 - 4.8 kernels
and iproute2 support for vrf keyword.
Signed-off-by: NDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Increment the mgmt revision due to the recently added new
reason code for the Disconnected event.
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

If link is disconnected due to Authentication Failure (PIN or Key
Missing status) userspace will be notified about this with proper error
code. Many LE profiles define "PIN or Key Missing" status as indication
of remote lost bond so this allows userspace to take action on this.

@ Device Connected: 88:63:DF:88:0E:83 (1) flags 0x0000
        02 01 1a 05 03 0a 18 0d 18 0b 09 48 65 61 72 74  ...........Heart
        20 52 61 74 65                                    Rate
> HCI Event: Command Status (0x0f) plen 4
      LE Read Remote Used Features (0x08|0x0016) ncmd 1
        Status: Success (0x00)
> ACL Data RX: Handle 3585 flags 0x02 dlen 11
      ATT: Read By Group Type Request (0x10) len 6
        Handle range: 0x0001-0xffff
        Attribute group type: Primary Service (0x2800)
> HCI Event: LE Meta Event (0x3e) plen 12
      LE Read Remote Used Features (0x04)
        Status: Success (0x00)
        Handle: 3585
        Features: 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00
          LE Encryption
< HCI Command: LE Start Encryption (0x08|0x0019) plen 28
        Handle: 3585
        Random number: 0x0000000000000000
        Encrypted diversifier: 0x0000
        Long term key: 26201cd479a0921b6f949f0b1fa8dc82
> HCI Event: Command Status (0x0f) plen 4
      LE Start Encryption (0x08|0x0019) ncmd 1
        Status: Success (0x00)
> HCI Event: Encryption Change (0x08) plen 4
        Status: PIN or Key Missing (0x06)
        Handle: 3585
        Encryption: Disabled (0x00)
< HCI Command: Disconnect (0x01|0x0006) plen 3
        Handle: 3585
        Reason: Authentication Failure (0x05)
> HCI Event: Command Status (0x0f) plen 4
      Disconnect (0x01|0x0006) ncmd 1
        Status: Success (0x00)
> HCI Event: Disconnect Complete (0x05) plen 4
        Status: Success (0x00)
        Handle: 3585
        Reason: Connection Terminated By Local Host (0x16)
@ Device Disconnected: 88:63:DF:88:0E:83 (1) reason 4

@ Device Connected: C4:43:8F:A3:4D:83 (0) flags 0x0000
        08 09 4e 65 78 75 73 20 35                       ..Nexus 5
> HCI Event: Command Status (0x0f) plen 4
      Authentication Requested (0x01|0x0011) ncmd 1
        Status: Success (0x00)
> HCI Event: Link Key Request (0x17) plen 6
        Address: C4:43:8F:A3:4D:83 (LG Electronics)
< HCI Command: Link Key Request Reply (0x01|0x000b) plen 22
        Address: C4:43:8F:A3:4D:83 (LG Electronics)
        Link key: 080812e4aa97a863d11826f71f65a933
> HCI Event: Command Complete (0x0e) plen 10
      Link Key Request Reply (0x01|0x000b) ncmd 1
        Status: Success (0x00)
        Address: C4:43:8F:A3:4D:83 (LG Electronics)
> HCI Event: Auth Complete (0x06) plen 3
        Status: PIN or Key Missing (0x06)
        Handle: 75
@ Authentication Failed: C4:43:8F:A3:4D:83 (0) status 0x05
< HCI Command: Disconnect (0x01|0x0006) plen 3
        Handle: 75
        Reason: Remote User Terminated Connection (0x13)
> HCI Event: Command Status (0x0f) plen 4
      Disconnect (0x01|0x0006) ncmd 1
        Status: Success (0x00)
> HCI Event: Disconnect Complete (0x05) plen 4
        Status: Success (0x00)
        Handle: 75
        Reason: Connection Terminated By Local Host (0x16)
@ Device Disconnected: C4:43:8F:A3:4D:83 (0) reason 4
Signed-off-by: NSzymon Janc <szymon.janc@codecoup.pl>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

Trace EMAD messages going down to HW and up from HW. Devlink needs to be
registered before EMAD init so the trace function can be called
with valid devlink handle.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
v1->v2:
- Use trace_devlink_hwmsg directly
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Define a tracepoint and allow user to trace messages going to and from
hardware associated with devlink instance.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Acked-by: NSteven Rostedt <rostedt@goodmis.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fixes the following sparse warning:

net/dsa/dsa2.c:680:6: warning:
 symbol '_dsa_unregister_switch' was not declared. Should it be static?
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fix missing clk_disable_unprepare() call before return
from dwceqos_probe() in the error handling case of invalid
fixed-link.
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Fixes the following sparse warnings:

drivers/net/ethernet/mediatek/mtk_eth_soc.c:79:5: warning:
 symbol '_mtk_mdio_write' was not declared. Should it be static?
drivers/net/ethernet/mediatek/mtk_eth_soc.c:98:5: warning:
 symbol '_mtk_mdio_read' was not declared. Should it be static?
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

security initialized after alloc workqueue, so we should exit security
before destroy workqueue in the error handing.

Fixes: 648af7fc ("rxrpc: Absorb the rxkad security module")
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

PTR_ERR should access the value just tested by IS_ERR, otherwise
the wrong error code will be returned.
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This script helps to create bonding network devices based on synthetic NIC
(the virtual network adapter usually provided by Hyper-V) and the matching
VF NIC (SRIOV virtual function). So the synthetic NIC and VF NIC can
function as one network device, and fail over to the synthetic NIC if VF is
down.

Mayjor distros (RHEL, Ubuntu, SLES) supported by Hyper-V are supported by
this script.
Signed-off-by: NHaiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: NK. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

isr function issues SPI read command to mrf to obtain INTSTAT.
SPI transfer is 2 bytes, but value of 2nd byte is not defined.
This had the effect that only the first ISR worked as intended. The
second ISR read incorrect INTSTAT values. Observed on Raspberry PI B+.
Signed-off-by: NWalter Mack <wmack@componentsw.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The Makefile controlling compilation of this file is obj-y,
meaning that it currently is never being built as a module.

Since MODULE_ALIAS is a no-op for non-modular code, we can simply
remove the MODULE_ALIAS_NETPROTO variant used here.

We replace module.h with kmod.h since the file does make use of
request_module() in order to load other modules from here.

We don't have to worry about init.h coming in via the removed
module.h since the file explicitly includes init.h already.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: netdev@vger.kernel.org
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In case of error, the function devm_ioremap_resource() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should be
replaced with IS_ERR().
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

T: Bus=01 Lev=01 Prnt=01 Port=07 Cnt=05 Dev#= 5 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=13d3 ProdID=3490 Rev=00.01
C: #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
I: If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb

BugLink: https://bugs.launchpad.net/bugs/1600623Signed-off-by: NDmitry Tunin <hanipouspilot@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Cc: stable@vger.kernel.org

   drivers/net/dsa/b53/b53_srab.c: In function 'b53_srab_probe':
>> drivers/net/dsa/b53/b53_srab.c:388:20: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
      pdata->chip_id = (u32)of_id->data;
                       ^
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The Kconfig currently controlling compilation of this code is:

init/Kconfig:config BPF_SYSCALL
init/Kconfig:   bool "Enable bpf() system call"

...meaning that it currently is not being built as a module by anyone.

Lets remove the couple traces of modular infrastructure use, so that
when reading the driver there is no doubt it is builtin-only.

Note that MODULE_ALIAS is a no-op for non-modular code.

We replace module.h with init.h since the file does use __init.

Cc: Alexei Starovoitov <ast@kernel.org>
Cc: netdev@vger.kernel.org
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: NDaniel Borkmann <daniel@iogearbox.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

idx can be returned as -ENOSPC, so we should check for this first
before using it as an index into nn->vxlan_usecnt[] to avoid an
out of bounds array offset read.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Acked-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Enable lan91x adapters in some ARM machines and models
when booted with an ACPI kernel.
Signed-off-by: NJeremy Linton <jeremy.linton@arm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Some comments weren't updated to reflect the renaming of ndo's and the
change of arguments.
Signed-off-by: NSabrina Dubroca <sd@queasysnail.net>
Acked-by: NAlexander Duyck <aduyck@mirantis.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As requested by Scott, removing him.
Signed-off-by: NScott Feldman <sfeldma@gmail.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Using a combination if #if conditionals and goto labels to unwind
tunnel4_init seems unwieldy. This patch takes a simpler approach of
directly unregistering previously registered protocols when an error
occurs.

This fixes a number of problems with the current implementation
including the potential presence of labels when they are unused
and the potential absence of unregister code when it is needed.

Fixes: 8afe97e5 ("tunnels: support MPLS over IPv4 tunnels")
Signed-off-by: NSimon Horman <simon.horman@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Xin Long says:

====================
sctp: implement rfc7496 in sctp

This patchset implements "Additional Policies for the Partially Reliable
Stream Control Transmission Protocol Extension" described on RFC7496.

The Partially Reliable SCTP (PR-SCTP) extension defined in [RFC3758]
provides a generic method for senders to abandon user messages. The
decision to abandon a user message is sender side only, and the exact
condition is called a "PR-SCTP policy". This patchset implements 3
policies:

 1. Timed Reliability:  This allows the sender to specify a timeout for
    a user message after which the SCTP stack abandons the user message.

 2. Limited Retransmission Policy:  Allows limitation of the number of
    retransmissions.

 3. Priority Policy:  Allows removal of lower-priority messages if space
    for higher-priority messages is needed in the send buffer.

Patch 1-3 add some sockopts in sctp to set/get pr_sctp policy status.
Patch 4-6 implement these 3 policies one by one.
====================
Acked-by: NMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

prsctp PRIO policy is a policy to abandon lower priority chunks when
asoc doesn't have enough snd buffer, so that the current chunk with
higher priority can be queued successfully.

Similar to TTL/RTX policy, we will set the priority of the chunk to
prsctp_param with sinfo->sinfo_timetolive in sctp_set_prsctp_policy().
So if PRIO policy is enabled, msg->expire_at won't work.

asoc->sent_cnt_removable will record how many chunks can be checked to
remove. If priority policy is enabled, when the chunk is queued into
the out_queue, we will increase sent_cnt_removable. When the chunk is
moved to abandon_queue or dequeue and free, we will decrease
sent_cnt_removable.

In sctp_sendmsg, we will check if there is enough snd buffer for current
msg and if sent_cnt_removable is not 0. Then try to abandon chunks in
sctp_prune_prsctp when sendmsg from the retransmit/transmited queue, and
free chunks from out_queue in right order until the abandon+free size >
msg_len - sctp_wfree. For the abandon size, we have to wait until it
sends FORWARD TSN, receives the sack and the chunks are really freed.
Signed-off-by: NXin Long <lucien.xin@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

prsctp RTX policy is a policy to abandon chunks when they are
retransmitted beyond the max count.

This patch uses sent_count to count how many times one chunk has
been sent, and prsctp_param is the max rtx count, which is from
sinfo->sinfo_timetolive in sctp_set_prsctp_policy(). So similar
to TTL policy, if RTX policy is enabled, msg->expire_at won't
work.

Then in sctp_chunk_abandoned, this patch checks if chunk->sent_count
is bigger than chunk->prsctp_param to abandon this chunk.
Signed-off-by: NXin Long <lucien.xin@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

prsctp TTL policy is a policy to abandon chunks when they expire
at the specific time in local stack. It's similar with expires_at
in struct sctp_datamsg.

This patch uses sinfo->sinfo_timetolive to set the specific time for
TTL policy. sinfo->sinfo_timetolive is also used for msg->expires_at.
So if prsctp_enable or TTL policy is not enabled, msg->expires_at
still works as before.
Signed-off-by: NXin Long <lucien.xin@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch adds SCTP_PR_ASSOC_STATUS to sctp sockopt, which is used
to dump the prsctp statistics info from the asoc. The prsctp statistics
includes abandoned_sent/unsent from the asoc. abandoned_sent is the
count of the packets we drop packets from retransmit/transmited queue,
and abandoned_unsent is the count of the packets we drop from out_queue
according to the policy.

Note: another option for prsctp statistics dump described in rfc is
SCTP_PR_STREAM_STATUS, which is used to dump the prsctp statistics
info from each stream. But by now, linux doesn't yet have per stream
statistics info, it needs rfc6525 to be implemented. As the prsctp
statistics for each stream has to be based on per stream statistics,
we will delay it until rfc6525 is done in linux.
Signed-off-by: NXin Long <lucien.xin@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch adds SCTP_DEFAULT_PRINFO to sctp sockopt. It is used
to set/get sctp Partially Reliable Policies' default params,
which includes 3 policies (ttl, rtx, prio) and their values.

Still, if we set policy params in sndinfo, we will use the params
of sndinfo against chunks, instead of the default params.

In this patch, we will use 5-8bit of sp/asoc->default_flags
to store prsctp policies, and reuse asoc->default_timetolive
to store their values. It means if we enable and set prsctp
policy, prior ttl timeout in sctp will not work any more.
Signed-off-by: NXin Long <lucien.xin@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

According to section 4.5 of rfc7496, prsctp_enable should be per asoc.
We will add prsctp_enable to both asoc and ep, and replace the places
where it used net.sctp->prsctp_enable with asoc->prsctp_enable.

ep->prsctp_enable will be initialized with net.sctp->prsctp_enable, and
asoc->prsctp_enable will be initialized with ep->prsctp_enable. We can
also modify it's value through sockopt SCTP_PR_SUPPORTED.
Signed-off-by: NXin Long <lucien.xin@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

LPM can be enabled via a DDC write command at specific DDC ID.
As any other DDC value, this is up to the DDC config file to
include (or not) the low power mode configuration.
Signed-off-by: NLoic Poulain <loic.poulain@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This reverts commit 4386f566 ("net: ethernet: bcmgenet: use
phy_ethtool_{get|set}_link_ksettings")

This patch is wrong, the function phy_ethtool_{get|set}_link_ksettings
don't check if the device is running, but the driver bcmgenet need this
check.

The function {get|set}_settings need to access the mdio bus, and this
bus may only be used when the device is running. Otherwise, the clock
is disable and a mdio access will fail.
Signed-off-by: NPhilippe Reynes <tremyfr@gmail.com>
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Florian Fainelli says:

====================
net: dsa: b53: Add Broadcom NSP switch support

This patch series updates the B53 driver to support Broadcom's Northstar Plus
Soc integrated switch.

Unlike the version of the core present in BCM5301x/Northstar, we cannot read the
full chip id of the switch, so we need to get the information about our switch
id from Device Tree.

Other than that, this is a regular Broadcom Ethernet switch which is register
compatible for all practical purposes with the existing switch driver.

Since DSA requires a working CPU Ethernet MAC driver this depends on Jon
Mason's AMAC/BGMAC driver changes to support NSP. Board specific changes depend
on patches present in Broadcom's ARM SoC branches and will be posted in a short
while.
====================
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Update the SRAB, core driver and binding document to support the
BCM585xx/586xx/88312 integrated switch (Northstar Plus SoCs family).
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>