openwrt/staging/blogic.git
7 years agobpf: Add map_name to bpf_map_info
Martin KaFai Lau [Wed, 27 Sep 2017 21:37:53 +0000 (14:37 -0700)]
bpf: Add map_name to bpf_map_info

This patch allows userspace to specify a name for a map
during BPF_MAP_CREATE.

The map's name can later be exported to user space
via BPF_OBJ_GET_INFO_BY_FD.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Alexei Starovoitov <ast@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: Add name, load_time, uid and map_ids to bpf_prog_info
Martin KaFai Lau [Wed, 27 Sep 2017 21:37:52 +0000 (14:37 -0700)]
bpf: Add name, load_time, uid and map_ids to bpf_prog_info

The patch adds name and load_time to struct bpf_prog_aux.  They
are also exported to bpf_prog_info.

The bpf_prog's name is passed by userspace during BPF_PROG_LOAD.
The kernel only stores the first (BPF_PROG_NAME_LEN - 1) bytes
and the name stored in the kernel is always \0 terminated.

The kernel will reject name that contains characters other than
isalnum() and '_'.  It will also reject name that is not null
terminated.

The existing 'user->uid' of the bpf_prog_aux is also exported to
the bpf_prog_info as created_by_uid.

The existing 'used_maps' of the bpf_prog_aux is exported to
the newly added members 'nr_map_ids' and 'map_ids' of
the bpf_prog_info.  On the input, nr_map_ids tells how
big the userspace's map_ids buffer is.  On the output,
nr_map_ids tells the exact user_map_cnt and it will only
copy up to the userspace's map_ids buffer is allowed.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Alexei Starovoitov <ast@fb.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agotcp: fix under-evaluated ssthresh in TCP Vegas
Hoang Tran [Wed, 27 Sep 2017 16:30:58 +0000 (18:30 +0200)]
tcp: fix under-evaluated ssthresh in TCP Vegas

With the commit 76174004a0f19785 (tcp: do not slow start when cwnd equals
ssthresh), the comparison to the reduced cwnd in tcp_vegas_ssthresh() would
under-evaluate the ssthresh.

Signed-off-by: Hoang Tran <hoang.tran@uclouvain.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: bridge: add per-port group_fwd_mask with less restrictions
Nikolay Aleksandrov [Wed, 27 Sep 2017 13:12:44 +0000 (16:12 +0300)]
net: bridge: add per-port group_fwd_mask with less restrictions

We need to be able to transparently forward most link-local frames via
tunnels (e.g. vxlan, qinq). Currently the bridge's group_fwd_mask has a
mask which restricts the forwarding of STP and LACP, but we need to be able
to forward these over tunnels and control that forwarding on a per-port
basis thus add a new per-port group_fwd_mask option which only disallows
mac pause frames to be forwarded (they're always dropped anyway).
The patch does not change the current default situation - all of the others
are still restricted unless configured for forwarding.
We have successfully tested this patch with LACP and STP forwarding over
VxLAN and qinq tunnels.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'hns3-dcb'
David S. Miller [Thu, 28 Sep 2017 17:35:12 +0000 (10:35 -0700)]
Merge branch 'hns3-dcb'

Yunsheng Lin says:

====================
Add support for DCB feature in hns3 driver

The patchset contains some enhancement related to DCB before
adding support for DCB feature.

This patchset depends on the following patchset:
https://patchwork.ozlabs.org/cover/815646/
https://patchwork.ozlabs.org/cover/816145/

High Level Architecture:

                   [ lldpad ]
                       |
                       |
                       |
                 [ hns3_dcbnl ]
                       |
                       |
                       |
                 [ hclge_dcb ]
                   /      \
                /            \
             /                  \
     [ hclge_main ]        [ hclge_tm ]

Current patch-set support following functionality:
   Use of lldptool to configure the tc schedule mode, tc
   bandwidth(if schedule mode is ETS), prio_tc_map and
   PFC parameter.

V3: Drop mqprio support

V2: Fix for not defining variables in local loop.

V1: Initial Submit.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: Add DCB support when interacting with network stack
Yunsheng Lin [Wed, 27 Sep 2017 01:45:32 +0000 (09:45 +0800)]
net: hns3: Add DCB support when interacting with network stack

When using lldptool to configure DCB parameter, hclge_dcb module
call the client_ops->setup_tc to tell network stack which queue
and priority is using for specific tc.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: Setting for fc_mode and dcb enable flag in TM module
Yunsheng Lin [Wed, 27 Sep 2017 01:45:31 +0000 (09:45 +0800)]
net: hns3: Setting for fc_mode and dcb enable flag in TM module

After the DCB feature is supported, fc_mode and dcb enable flag
must be set according to the DCB parameter.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: Add dcb netlink interface for the support of DCB feature
Yunsheng Lin [Wed, 27 Sep 2017 01:45:30 +0000 (09:45 +0800)]
net: hns3: Add dcb netlink interface for the support of DCB feature

This patch add dcb netlink interface by calling the interface from
hclge_dcb module.

This patch also update Makefile in order to build hns3_dcbnl module.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: Add hclge_dcb module for the support of DCB feature
Yunsheng Lin [Wed, 27 Sep 2017 01:45:29 +0000 (09:45 +0800)]
net: hns3: Add hclge_dcb module for the support of DCB feature

The hclge_dcb module calls the interface from hclge_main/tm
and provide interface for the dcb netlink interface.

This patch also update Makefiles required to build the DCB
supported code in HNS3 Ethernet driver and update the existing
Kconfig file in the hisilicon folder.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: Add some interface for the support of DCB feature
Yunsheng Lin [Wed, 27 Sep 2017 01:45:28 +0000 (09:45 +0800)]
net: hns3: Add some interface for the support of DCB feature

This patch add some interface and export some interface from
hclge_tm and hclgc_main to support the upcoming DCB feature.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: Add tc-based TM support for sriov enabled port
Yunsheng Lin [Wed, 27 Sep 2017 01:45:27 +0000 (09:45 +0800)]
net: hns3: Add tc-based TM support for sriov enabled port

When sriov is enabled and TM is in tc-based mode, vf's TM
parameters is not set in TM initialization process.
This patch add the tc_based TM support for sriov enabled
using the information in vport struct.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: Add support for port shaper setting in TM module
Yunsheng Lin [Wed, 27 Sep 2017 01:45:26 +0000 (09:45 +0800)]
net: hns3: Add support for port shaper setting in TM module

This patch add a tm_port_shaper cmd and set port shaper
to HCLGE_ETHER_MAX_RATE on TM initialization process.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: Add support for PFC setting in TM module
Yunsheng Lin [Wed, 27 Sep 2017 01:45:25 +0000 (09:45 +0800)]
net: hns3: Add support for PFC setting in TM module

This patch add a pfc_pause_en cmd, and use it to configure
PFC option according to fc_mode in hdev->tm_info.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: Add support for dynamically buffer reallocation
Yunsheng Lin [Wed, 27 Sep 2017 01:45:24 +0000 (09:45 +0800)]
net: hns3: Add support for dynamically buffer reallocation

Current buffer allocation can only happen at init, when
doing buffer reallocation after init, care must be taken
care of memory which priv_buf points to.
This patch fixes it by using a dynamic allocated temporary
memory. Because we only do buffer reallocation at init or
when setting up the DCB parameter, and priv_buf is only
used at buffer allocation process, so it is ok to use a
dynamic allocated temporary memory.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: hns3: Support for dynamically assigning tx buffer to TC
Yunsheng Lin [Wed, 27 Sep 2017 01:45:23 +0000 (09:45 +0800)]
net: hns3: Support for dynamically assigning tx buffer to TC

This patch add support of dynamically assigning tx buffer to
TC when the TC is enabled.
It will save buffer for rx direction to avoid packet loss.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoarp: make arp_hdr_len() return unsigned int
Alexey Dobriyan [Tue, 26 Sep 2017 20:12:28 +0000 (23:12 +0300)]
arp: make arp_hdr_len() return unsigned int

Negative ARP header length are not a thing.

Constify arguments while I'm at it.

Space savings:

add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-3 (-3)
function                        old     new   delta
arpt_do_table                  1163    1160      -3

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet-next/hinic: Fix a case of Tx Queue is Stopped forever
Aviad Krawczyk [Tue, 26 Sep 2017 18:11:33 +0000 (02:11 +0800)]
net-next/hinic: Fix a case of Tx Queue is Stopped forever

Fix the following scenario:
1. tx_free_poll is running on cpu X
2. xmit function is running on cpu Y and fails to get sq wqe
3. tx_free_poll frees wqes on cpu X and checks the queue is not stopped
4. xmit function stops the queue after failed to get sq wqe
5. The queue is stopped forever

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet-next/hinic: Set Rxq irq to specific cpu for NUMA
Aviad Krawczyk [Tue, 26 Sep 2017 17:57:50 +0000 (01:57 +0800)]
net-next/hinic: Set Rxq irq to specific cpu for NUMA

Set Rxq irq to specific cpu for allocating and receiving the skb from
the same node.

Signed-off-by: Aviad Krawczyk <aviad.krawczyk@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'bpf-verifier-disassembly-improvements'
David S. Miller [Thu, 28 Sep 2017 17:23:19 +0000 (10:23 -0700)]
Merge branch 'bpf-verifier-disassembly-improvements'

Edward Cree says:

====================
bpf/verifier: disassembly improvements

Fix the output of print_bpf_insn() for ALU ops that don't look like
 compound assignment (i.e. BPF_END and BPF_NEG).

Sample output for a short test program:
0: (b4) (u32) r0 = (u32) 0
1: (dc) r0 = be32 r0
2: (84) r0 = (u32) -r0
3: (95) exit
processed 4 insns, stack depth 0
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf/verifier: improve disassembly of BPF_NEG instructions
Edward Cree [Tue, 26 Sep 2017 15:35:29 +0000 (16:35 +0100)]
bpf/verifier: improve disassembly of BPF_NEG instructions

BPF_NEG takes only one operand, unlike the bulk of BPF_ALU[64] which are
 compound-assignments.  So give it its own format in print_bpf_insn().

Signed-off-by: Edward Cree <ecree@solarflare.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf/verifier: improve disassembly of BPF_END instructions
Edward Cree [Tue, 26 Sep 2017 15:35:13 +0000 (16:35 +0100)]
bpf/verifier: improve disassembly of BPF_END instructions

print_bpf_insn() was treating all BPF_ALU[64] the same, but BPF_END has a
 different structure: it has a size in insn->imm (even if it's BPF_X) and
 uses the BPF_SRC (X or K) to indicate which endianness to use.  So it
 needs different code to print it.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agocxgb4: make function ch_flower_stats_cb, fixes warning
Colin Ian King [Tue, 26 Sep 2017 15:14:09 +0000 (16:14 +0100)]
cxgb4: make function ch_flower_stats_cb, fixes warning

The function ch_flower_stats_cb is local to the source and does not need
to be in global scope, so make it static.

Cleans up sparse warnings:
symbol 'ch_flower_stats_cb' was not declared. Should it be static?

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'rtnl-pushdown-prep'
David S. Miller [Thu, 28 Sep 2017 17:20:49 +0000 (10:20 -0700)]
Merge branch 'rtnl-pushdown-prep'

Florian Westphal says:

====================
rtnetlink: preparation patches for further rtnl lock pushdown/removal

Patches split large rtnl_fill_ifinfo into smaller chunks
to better see which parts

1. require rtnl
2. do not require it at all
3. rely on rtnl locking now but could be converted

Changes since v3:

I dropped the 'ifalias' patch, I have a change to decouple ifalias and
rtnl mutex, I will send it once this series has been merged.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agortnetlink: rtnl_have_link_slave_info doesn't need rtnl
Florian Westphal [Tue, 26 Sep 2017 11:58:43 +0000 (13:58 +0200)]
rtnetlink: rtnl_have_link_slave_info doesn't need rtnl

it can be switched to rcu.

Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agortnetlink: add helpers to dump netnsid information
Florian Westphal [Tue, 26 Sep 2017 11:58:42 +0000 (13:58 +0200)]
rtnetlink: add helpers to dump netnsid information

Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agortnetlink: add helpers to dump vf information
Florian Westphal [Tue, 26 Sep 2017 11:58:41 +0000 (13:58 +0200)]
rtnetlink: add helpers to dump vf information

similar to earlier patches, split out more parts of this function to
better see what is happening and where we assume rtnl is locked.

Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agortnetlink: add helper to put master and link ifindexes
Florian Westphal [Tue, 26 Sep 2017 11:58:40 +0000 (13:58 +0200)]
rtnetlink: add helper to put master and link ifindexes

rtnl_fill_ifinfo currently requires caller to hold the rtnl mutex.
Unfortunately the function is quite large which makes it harder to see
which spots require the lock, which spots assume it and which ones could
do without.

Add helpers to factor out the ifindex dumping, one can use rcu to avoid
rtnl dependency.

Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoselftests: rtnetlink.sh: add rudimentary vrf test
Florian Westphal [Tue, 26 Sep 2017 05:40:42 +0000 (07:40 +0200)]
selftests: rtnetlink.sh: add rudimentary vrf test

Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: use idr to allocate u32 filter handles
Cong Wang [Mon, 25 Sep 2017 17:13:51 +0000 (10:13 -0700)]
net_sched: use idr to allocate u32 filter handles

Instead of calling u32_lookup_ht() in a loop to find
a unused handle, just switch to idr API to allocate
new handles. u32 filters are special as the handle
could contain a hash table id and a key id, so we
need two IDR to allocate each of them.

Cc: Chris Mi <chrism@mellanox.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: use idr to allocate basic filter handles
Cong Wang [Mon, 25 Sep 2017 17:13:50 +0000 (10:13 -0700)]
net_sched: use idr to allocate basic filter handles

Instead of calling basic_get() in a loop to find
a unused handle, just switch to idr API to allocate
new handles.

Cc: Chris Mi <chrism@mellanox.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet_sched: use idr to allocate bpf filter handles
Cong Wang [Mon, 25 Sep 2017 17:13:49 +0000 (10:13 -0700)]
net_sched: use idr to allocate bpf filter handles

Instead of calling cls_bpf_get() in a loop to find
a unused handle, just switch to idr API to allocate
new handles.

Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Chris Mi <chrism@mellanox.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoinetpeer: speed up inetpeer_invalidate_tree()
Eric Dumazet [Mon, 25 Sep 2017 16:14:14 +0000 (09:14 -0700)]
inetpeer: speed up inetpeer_invalidate_tree()

As measured in my prior patch ("sch_netem: faster rb tree removal"),
rbtree_postorder_for_each_entry_safe() is nice looking but much slower
than using rb_next() directly, except when tree is small enough
to fit in CPU caches (then the cost is the same)

From: Eric Dumazet <edumazet@google.com>

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'mlxsw-Add-support-for-offloading-IPv4-multicast-routes'
David S. Miller [Wed, 27 Sep 2017 18:33:28 +0000 (11:33 -0700)]
Merge branch 'mlxsw-Add-support-for-offloading-IPv4-multicast-routes'

Jiri Pirko says:

====================
mlxsw: Add support for offloading IPv4 multicast routes

Yotam says:

This patch-set introduces offloading of the kernel IPv4 multicast router
logic in the Spectrum driver.

The first patch makes the Spectrum driver ignore FIB notifications that are
not of address family IPv4 or IPv6. This is needed in order to prevent
crashes while the next patches introduce the RTNL_FAMILY_IPMR FIB
notifications.

Patches 2-5 update ipmr to use the FIB notification chain for both MFC and
VIF notifications, and patches 8-12 update the Spectrum driver to register
to these notifications and offload the routes.

Similarly to IPv4 and IPv6, any failure will trigger the abort mechanism
which is updated in this patch-set to eject multicast route tables too.

At this stage, the following limitations apply:
 - A multicast MFC route will be offloaded by the driver if all the output
   interfaces are Spectrum router interfaces (RIFs). In any other case
   (which includes pimreg device, tunnel devices and management ports) the
   route will be trapped to the CPU and the packets will be forwarded by
   software.
 - ipmr proxy routes are not supported and will trigger the abort
   mechanism.
 - The MFC TTL values are currently treated as boolean: if the value is
   different than 255, the traffic is forwarded to the interface and if the
   value is 255 it is not forwarded. Dropping packets based on their TTL isn't
   currently supported.

To allow users to have visibility on which of the routes are offloaded and
which are not, patch 6 introduces a per-route offload indication similar to
IPv4 and IPv6 routes which is sent to the user via the RTNetlink interface.

The Spectrum driver multicast router offloading support, which is
introduced in patches 8 and 9, is divided into two parts:
 - The hardware logic which abstracts the Spectrum hardware and provides a
   simple API for the upper levels.
 - The offloading logic which gets the MFC and VIF notifications from the
   kernel and updates the hardware using the hardware logic part.

Finally, the last patch makes the Spectrum router logic not ignore the
multicast FIB notifications and call the corresponding functions in the
multicast router offloading logic.

---
v2->v3:
 - Move the ipmr_rule_default function definition to be inside the already
   existing CONFIG_IP_MROUTE_MULTIPLE_TABLES ifdef block (patch 6)
 - Remove double =0 initialization in spectrum_mr.c (patch 7)
 - Fix route4 allocation size (patch 7)
v1->v2:
 - Add comments for struct fields in mroute.h
 - Take the mrt_lock while dumping VIFs in the fib_notifier dump callback
 - Update the MFC lastuse field too
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum: router: Don't ignore IPMR notifications
Yotam Gigi [Wed, 27 Sep 2017 06:23:22 +0000 (08:23 +0200)]
mlxsw: spectrum: router: Don't ignore IPMR notifications

Make the Spectrum router logic not ignore the RTNL_FAMILY_IPMR FIB
notifications.

Past commits added the IPMR VIF and MFC add/del notifications via the
fib_notifier chain. In addition, a code for handling these notifications in
the Spectrum router logic was added. Make the Spectrum router logic not
ignore these notifications and forward the requests to the Spectrum
multicast router offloading logic.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum: Notify multicast router on RIF MTU changes
Yotam Gigi [Wed, 27 Sep 2017 06:23:21 +0000 (08:23 +0200)]
mlxsw: spectrum: Notify multicast router on RIF MTU changes

Due to the fact that multicast routes hold the minimum MTU of all the
egress RIFs and trap packets that don't meet it, notify the mulitcast
router code on RIF MTU changes.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum_router: Add multicast routes notification handling functionality
Yotam Gigi [Wed, 27 Sep 2017 06:23:20 +0000 (08:23 +0200)]
mlxsw: spectrum_router: Add multicast routes notification handling functionality

Add functionality for calling the multicast routing offloading logic upon
MFC and VIF add and delete notifications. In addition, call the multicast
routing upon RIF addition and deletion events.

As the multicast routing offload logic may sleep, the actual calls are done
in a deferred work. To ensure the MFC object is not freed in that interval,
a reference is held to it. In case of a failure, the abort mechanism is
used, which ejects all the routes from the hardware and triggers the
traffic to flow through the kernel.

Note: At that stage, the FIB notifications are still ignored, and will be
enabled in a further patch.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum: router: Squash the default route table to main
Yotam Gigi [Wed, 27 Sep 2017 06:23:19 +0000 (08:23 +0200)]
mlxsw: spectrum: router: Squash the default route table to main

Currently, the mlxsw Spectrum driver offloads only either the RT_TABLE_MAIN
FIB table or the VRF tables, so the RT_TABLE_LOCAL table is squashed to the
RT_TABLE_MAIN table to allow local routes to be offloaded too.

By default, multicast MFC routes which are not assigned to any user
requested table are put in the RT_TABLE_DEFAULT table.

Due to the fact that offloading multicast MFC routes support in Spectrum
router logic is going to be introduced soon, squash the default table to
MAIN too.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum: Add the multicast routing hardware logic
Yotam Gigi [Wed, 27 Sep 2017 06:23:18 +0000 (08:23 +0200)]
mlxsw: spectrum: Add the multicast routing hardware logic

Implement the multicast routing hardware API introduced in previous patch
for the specific spectrum hardware.

The spectrum hardware multicast routes are written using the RMFT2 register
and point to an ACL flexible action set. The actions used for multicast
routes are:
 - Counter action, which allows counting bytes and packets on multicast
   routes.
 - Multicast route action, which provide RPF check and do the actual packet
   duplication to a list of RIFs.
 - Trap action, in the case the route action specified by the called is
   trap.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum: Add the multicast routing offloading logic
Yotam Gigi [Wed, 27 Sep 2017 06:23:17 +0000 (08:23 +0200)]
mlxsw: spectrum: Add the multicast routing offloading logic

Add the multicast router offloading logic, which is in charge of handling
the VIF and MFC notifications and translating it to the hardware logic API.

The offloading logic has to overcome several obstacles in order to safely
comply with the kernel multicast router user API:
 - It must keep track of the mapping between VIFs to netdevices. The user
   can add an MFC cache entry pointing to a VIF, delete the VIF and add
   re-add it with a different netdevice. The offloading logic has to handle
   this in order to be compatible with the kernel logic.
 - It must keep track of the mapping between netdevices to spectrum RIFs,
   as the current hardware implementation assume having a RIF for every
   port in a multicast router.
 - It must handle routes pointing to pimreg device to be trapped to the
   kernel, as the packet should be delivered to userspace.
 - It must handle routes pointing tunnel VIFs. The current implementation
   does not support multicast forwarding to tunnels, thus routes that point
   to a tunnel should be trapped to the kernel.
 - It must be aware of proxy multicast routes, which include both (*,*)
   routes and duplicate routes. Currently proxy routes are not offloaded
   and trigger the abort mechanism: removal of all routes from hardware and
   triggering the traffic to go through the kernel.

The multicast routing offloading logic also updates the counters of the
offloaded MFC routes in a periodic work.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: mroute: Check if rule is a default rule
Yotam Gigi [Wed, 27 Sep 2017 06:23:16 +0000 (08:23 +0200)]
net: mroute: Check if rule is a default rule

When the ipmr starts, it adds one default FIB rule that matches all packets
and sends them to the DEFAULT (multicast) FIB table. A more complex rule
can be added by user to specify that for a specific interface, a packet
should be look up at either an arbitrary table or according to the l3mdev
of the interface.

For drivers willing to offload the ipmr logic into a hardware but don't
want to offload all the FIB rules functionality, provide a function that
can indicate whether the FIB rule is the default multicast rule, thus only
one routing table is needed.

This way, a driver can register to the FIB notification chain, get
notifications about FIB rules added and trigger some kind of an internal
abort mechanism when a non default rule is added by the user.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ipmr: Add MFC offload indication
Yotam Gigi [Wed, 27 Sep 2017 06:23:15 +0000 (08:23 +0200)]
net: ipmr: Add MFC offload indication

Allow drivers, registered to the fib notification chain indicate whether a
multicast MFC route is offloaded or not, similarly to unicast routes. The
indication of whether a route is offloaded is done using the mfc_flags
field on an mfc_cache struct, and the information is sent to the userspace
via the RTNetlink interface only.

Currently, MFC routes are either offloaded or not, thus there is no need to
add per-VIF offload indication.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoipmr: Send FIB notifications on MFC and VIF entries
Yotam Gigi [Wed, 27 Sep 2017 06:23:14 +0000 (08:23 +0200)]
ipmr: Send FIB notifications on MFC and VIF entries

Use the newly introduced notification chain to send events upon VIF and MFC
addition and deletion. The MFC notifications are sent only on resolved MFC
entries, as unresolved cannot be offloaded.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoipmr: Add FIB notification access functions
Yotam Gigi [Wed, 27 Sep 2017 06:23:13 +0000 (08:23 +0200)]
ipmr: Add FIB notification access functions

Make the ipmr module register as a FIB notifier. To do that, implement both
the ipmr_seq_read and ipmr_dump ops.

The ipmr_seq_read op returns a sequence counter that is incremented on
every notification related operation done by the ipmr. To implement that,
add a sequence counter in the netns_ipv4 struct and increment it whenever a
new MFC route or VIF are added or deleted. The sequence operations are
protected by the RTNL lock.

The ipmr_dump iterates the list of MFC routes and the list of VIF entries
and sends notifications about them. The entries dump is done under RCU
where the VIF dump uses the mrt_lock too, as the vif->dev field can change
under RCU.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoipmr: Add reference count to MFC entries
Yotam Gigi [Wed, 27 Sep 2017 06:23:12 +0000 (08:23 +0200)]
ipmr: Add reference count to MFC entries

Next commits will introduce MFC notifications through the atomic
fib_notification chain, thus allowing modules to be aware of MFC entries.

Due to the fact that modules may need to hold a reference to an MFC entry,
add reference count to MFC entries to prevent them from being freed while
these modules use them.

The reference counting is done only on resolved MFC entries currently.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agofib: notifier: Add VIF add and delete event types
Yotam Gigi [Wed, 27 Sep 2017 06:23:11 +0000 (08:23 +0200)]
fib: notifier: Add VIF add and delete event types

In order for an interface to forward packets according to the kernel
multicast routing table, it must be configured with a VIF index according
to the mroute user API. The VIF index is then used to refer to that
interface in the mroute user API, for example, to set the iif and oifs of
an MFC entry.

In order to allow drivers to be aware and offload multicast routes, they
have to be aware of the VIF add and delete notifications.

Due to the fact that a specific VIF can be deleted and re-added pointing to
another netdevice, and the MFC routes that point to it will forward the
matching packets to the new netdevice, a driver willing to offload MFC
cache entries must be aware of the VIF add and delete events in addition to
MFC routes notifications.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'nfp-flower-vxlan-tunnel-offload'
David S. Miller [Wed, 27 Sep 2017 04:27:36 +0000 (21:27 -0700)]
Merge branch 'nfp-flower-vxlan-tunnel-offload'

Simon Horman says:

====================
nfp: flower vxlan tunnel offload

John says:

This patch set allows offloading of TC flower match and set tunnel fields
to the NFP. The initial focus is on VXLAN traffic. Due to the current
state of the NFP firmware, only VXLAN traffic on well known port 4789 is
handled. The match and action fields must explicity set this value to be
supported. Tunnel end point information is also offloaded to the NFP for
both encapsulation and decapsulation. The NFP expects 3 separate data sets
to be supplied.

For decapsulation, 2 separate lists exist; a list of MAC addresses
referenced by an index comprised of the port number, and a list of IP
addresses. These IP addresses are not connected to a MAC or port. The MAC
addresses can be written as a block or one at a time (because they have an
index, previous values can be overwritten) while the IP addresses are
always written as a list of all the available IPs. Because the MAC address
used as a tunnel end point may be associated with a physical port or may
be a virtual netdev like an OVS bridge, we do not know which addresses
should be offloaded. For this reason, all MAC addresses of active netdevs
are offloaded to the NFP. A notifier checks for changes to any currently
offloaded MACs or any new netdevs that may occur. For IP addresses, the
tunnel end point used in the rules is known as the destination IP address
must be specified in the flower classifier rule. When a new IP address
appears in a rule, the IP address is offloaded. The IP is removed from the
offloaded list when all rules matching on that IP are deleted.

For encapsulation, a next hop table is updated on the NFP that contains
the source/dest IPs, MACs and egress port. These are written individually
when requested. If the NFP tries to encapsulate a packet but does not know
the next hop, then is sends a request to the host. The host carries out a
route lookup and populates the given entry on the NFP table. A notifier
also exists to check for any links changing or going down in the kernel
next hop table. If an offloaded next hop entry is removed from the kernel
then it is also removed on the NFP.

The NFP periodically sends a message to the host telling it which tunnel
ports have packets egressing the system. The host uses this information to
update the used value in the neighbour entry. This means that, rather than
expire when it times out, the kernel will send an ARP to check if the link
is still live. From an NFP perspective, this means that valid entries will
not be removed from its next hop table.
====================

Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonfp: flower vxlan neighbour keep-alive
John Hurley [Mon, 25 Sep 2017 10:23:41 +0000 (12:23 +0200)]
nfp: flower vxlan neighbour keep-alive

Periodically receive messages containing the destination IPs of tunnels
that have recently forwarded traffic. Update the neighbour entries 'used'
value for these IPs next hop.

This prevents the neighbour entry from expiring on timeout but rather
signals an ARP to verify the connection. From an NFP perspective, packets
will not fall back mid-flow unless the link is verified to be down.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonfp: flower vxlan neighbour offload
John Hurley [Mon, 25 Sep 2017 10:23:40 +0000 (12:23 +0200)]
nfp: flower vxlan neighbour offload

Receive a request when the NFP does not know the next hop for a packet
that is to be encapsulated in a VXLAN tunnel. Do a route lookup, determine
the next hop entry and update neighbour table on NFP. Monitor the kernel
neighbour table for link changes and update NFP with relevant information.
Overwrite routes with zero values on the NFP when they expire.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonfp: offload vxlan IPv4 endpoints of flower rules
John Hurley [Mon, 25 Sep 2017 10:23:39 +0000 (12:23 +0200)]
nfp: offload vxlan IPv4 endpoints of flower rules

Maintain a list of IPv4 addresses used as the tunnel destination IP match
fields in currently active flower rules. Offload the entire list of
NFP_FL_IPV4_ADDRS_MAX (even if some are unused) when new IPs are added or
removed. The NFP should only be aware of tunnel end points that are
currently used by rules on the device

Signed-off-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonfp: offload flower vxlan endpoint MAC addresses
John Hurley [Mon, 25 Sep 2017 10:23:38 +0000 (12:23 +0200)]
nfp: offload flower vxlan endpoint MAC addresses

Generate a list of MAC addresses of netdevs that could be used as VXLAN
tunnel end points. Give offloaded MACs an index for storage on the NFP in
the ranges:
0x100-0x1ff physical port representors
0x200-0x2ff VF port representors
0x300-0x3ff other offloads (e.g. vxlan netdevs, ovs bridges)

Assign phys and vf indexes based on unique 8 bit values in the port num.
Maintain list of other netdevs to ensure same netdev is not offloaded
twice and each gets a unique ID without exhausting the entries. Because
the IDs are unique but constant for a netdev, any changes are implemented
by overwriting the index on NFP.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonfp: compile flower vxlan tunnel set actions
John Hurley [Mon, 25 Sep 2017 10:23:37 +0000 (12:23 +0200)]
nfp: compile flower vxlan tunnel set actions

Compile set tunnel actions for tc flower. Only support VXLAN and ensure a
tunnel destination port of 4789 is used.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonfp: compile flower vxlan tunnel metadata match fields
John Hurley [Mon, 25 Sep 2017 10:23:36 +0000 (12:23 +0200)]
nfp: compile flower vxlan tunnel metadata match fields

Compile ovs-tc flower vxlan metadata match fields for offloading. Only
support offload of tunnel data when the VXLAN port specifically matches
well known port 4789.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonfp: add helper to get flower cmsg length
John Hurley [Mon, 25 Sep 2017 10:23:35 +0000 (12:23 +0200)]
nfp: add helper to get flower cmsg length

Add a helper function that returns the length of the cmsg data when given
the cmsg skb

Signed-off-by: John Hurley <john.hurley@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'mlxsw-pass-gact'
David S. Miller [Wed, 27 Sep 2017 03:26:45 +0000 (20:26 -0700)]
Merge branch 'mlxsw-pass-gact'

Jiri Pirko says:

====================
mlxsw: Introduce support for "pass" gact action offloading

Very simple patchset adds ability for user to insert filters with "pass"
gact action and offload it. That allows scenarios like this:

$ tc filter add dev enp3s0np19 ingress protocol ip pref 10 flower skip_sw dst_ip 192.168.101.0/24 action drop
$ tc filter add dev enp3s0np19 ingress protocol ip pref 9 flower skip_sw dst_ip 192.168.101.1 action pass
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum_flower: Offload "ok" termination action
Jiri Pirko [Mon, 25 Sep 2017 08:58:22 +0000 (10:58 +0200)]
mlxsw: spectrum_flower: Offload "ok" termination action

If action is "gact_ok", offload it to HW.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: sched: introduce helper to identify gact pass action
Jiri Pirko [Mon, 25 Sep 2017 08:58:21 +0000 (10:58 +0200)]
net: sched: introduce helper to identify gact pass action

Introduce a helper called is_tcf_gact_pass which could be used to
tell if the action is gact pass or not.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum_acl: Propagate errors from mlxsw_afa_block_jump/continue
Jiri Pirko [Mon, 25 Sep 2017 08:58:20 +0000 (10:58 +0200)]
mlxsw: spectrum_acl: Propagate errors from mlxsw_afa_block_jump/continue

Propagate error instead of doing WARN_ON right away.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'net-dsa-use-generic-slave-phydev'
David S. Miller [Wed, 27 Sep 2017 03:06:35 +0000 (20:06 -0700)]
Merge branch 'net-dsa-use-generic-slave-phydev'

Vivien Didelot says:

====================
net: dsa: use generic slave phydev

DSA currently stores a phy_device pointer in each slave private
structure. This requires to implement our own ethtool ksettings
accessors and such.

This patchset removes the private phy_device in favor of the one
provided in the net_device structure, and thus allows us to use the
generic phy_ethtool_* functions.
====================

Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dsa: use phy_ethtool_nway_reset
Vivien Didelot [Tue, 26 Sep 2017 21:15:35 +0000 (17:15 -0400)]
net: dsa: use phy_ethtool_nway_reset

Use phy_ethtool_nway_reset now that dsa_slave_nway_reset does exactly
the same.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dsa: use phy_ethtool_set_link_ksettings
Vivien Didelot [Tue, 26 Sep 2017 21:15:34 +0000 (17:15 -0400)]
net: dsa: use phy_ethtool_set_link_ksettings

Use phy_ethtool_set_link_ksettings now that dsa_slave_set_link_ksettings
does exactly the same.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dsa: use phy_ethtool_get_link_ksettings
Vivien Didelot [Tue, 26 Sep 2017 21:15:33 +0000 (17:15 -0400)]
net: dsa: use phy_ethtool_get_link_ksettings

Use phy_ethtool_get_link_ksettings now that dsa_slave_get_link_ksettings
does exactly the same.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dsa: use slave device phydev
Vivien Didelot [Tue, 26 Sep 2017 21:15:32 +0000 (17:15 -0400)]
net: dsa: use slave device phydev

There is no need to store a phy_device in dsa_slave_priv since
net_device already provides one. Simply s/p->phy/dev->phydev/.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: dsa: return -ENODEV is there is no slave PHY
Vivien Didelot [Tue, 26 Sep 2017 21:15:31 +0000 (17:15 -0400)]
net: dsa: return -ENODEV is there is no slave PHY

Instead of returning -EOPNOTSUPP when a slave device has no PHY,
directly return -ENODEV as ethtool and phylib do.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'mlxsw-Add-router-adjacency-dpipe-table'
David S. Miller [Wed, 27 Sep 2017 03:04:36 +0000 (20:04 -0700)]
Merge branch 'mlxsw-Add-router-adjacency-dpipe-table'

Jiri Pirko says:

====================
mlxsw: Add router adjacency dpipe table

Arkadi says:

This patchset adds router adjacency dpipe table support. This will provide
the ability to observe the hardware offloaded IPv4/6 nexthops.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum_dpipe: Add support for controlling nexthop counters
Arkadi Sharshevsky [Mon, 25 Sep 2017 08:32:30 +0000 (10:32 +0200)]
mlxsw: spectrum_dpipe: Add support for controlling nexthop counters

Add support for controlling nexthop counters via dpipe.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum_dpipe: Add support for adjacency table dump
Arkadi Sharshevsky [Mon, 25 Sep 2017 08:32:29 +0000 (10:32 +0200)]
mlxsw: spectrum_dpipe: Add support for adjacency table dump

Add support for adjacency table dump.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum: Add support for setting counters on nexthops
Arkadi Sharshevsky [Mon, 25 Sep 2017 08:32:28 +0000 (10:32 +0200)]
mlxsw: spectrum: Add support for setting counters on nexthops

Add support for setting counters on nexthops based on dpipe's adjacency
table counter status. This patch also adds the ability for getting the
counter value, which will be used by the dpipe adjacency table dump
implementation in the next patches.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: reg: Add support for counters on RATR
Arkadi Sharshevsky [Mon, 25 Sep 2017 08:32:27 +0000 (10:32 +0200)]
mlxsw: reg: Add support for counters on RATR

In order to add the ability for setting counters on nexthops the RATR
register should be extended.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum_dpipe: Add initial support for the router adjacency table
Arkadi Sharshevsky [Mon, 25 Sep 2017 08:32:26 +0000 (10:32 +0200)]
mlxsw: spectrum_dpipe: Add initial support for the router adjacency table

Add initial support for router adjacency table. The table does lookup
based on the nexthop-group index and the local nexthop offset. After
locating the nexthop entry it sets the destination MAC address and the
egress RIF.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum_router: Add helpers for nexthop access
Arkadi Sharshevsky [Mon, 25 Sep 2017 08:32:25 +0000 (10:32 +0200)]
mlxsw: spectrum_router: Add helpers for nexthop access

This is done as a preparation before introducing the ability to dump the
adjacency table via dpipe, and to count the table size. The current table
implementation avoids tunnel entries, thus a helper for checking if
the nexthop group contains tunnel entries is also provided. The mlxsw's
nexthop representative struct stays private to the router module.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum_router: Use helper to check for last neighbor
Arkadi Sharshevsky [Mon, 25 Sep 2017 08:32:24 +0000 (10:32 +0200)]
mlxsw: spectrum_router: Use helper to check for last neighbor

Use list_is_last helper to check for last neighbor.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum_router: Keep nexthops in a linked list
Arkadi Sharshevsky [Mon, 25 Sep 2017 08:32:23 +0000 (10:32 +0200)]
mlxsw: spectrum_router: Keep nexthops in a linked list

Keep nexthops in a linked list for easy access.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: Add fields for mlxsw's meta header for adjacency table
Arkadi Sharshevsky [Mon, 25 Sep 2017 08:32:22 +0000 (10:32 +0200)]
mlxsw: Add fields for mlxsw's meta header for adjacency table

This patch adds field for mlxsw's meta header which will be used to
describe the match/action behavior of the adjacency table.

The fields are:
1. Adj_index - The global index of the nexthop group in the adjacency
   table.

2. Adj_hash_index - Local index offset which is based on packets hash
   mod the nexthop group size.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agomlxsw: spectrum_dpipe: Fix indentation in header description
Arkadi Sharshevsky [Mon, 25 Sep 2017 08:32:21 +0000 (10:32 +0200)]
mlxsw: spectrum_dpipe: Fix indentation in header description

Fix indentation in mlxsw_meta header's description.

Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'bpf-metadata-direct-access'
David S. Miller [Tue, 26 Sep 2017 20:36:45 +0000 (13:36 -0700)]
Merge branch 'bpf-metadata-direct-access'

Daniel Borkmann says:

====================
BPF metadata for direct access

This work enables generic transfer of metadata from XDP into skb,
meaning the packet has a flexible and programmable room for meta
data, which can later be used by BPF to set various skb members
when passing up the stack. For details, please see second patch.
Support has been implemented and tested with two drivers, and
should be straight forward to add to other drivers as well which
properly support head adjustment already.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf, ixgbe: add meta data support
Daniel Borkmann [Mon, 25 Sep 2017 00:25:55 +0000 (02:25 +0200)]
bpf, ixgbe: add meta data support

Implement support for transferring XDP meta data into skb for
ixgbe driver; before calling into the program, xdp.data_meta points
to xdp.data, where on program return with pass verdict, we call
into skb_metadata_set().

We implement this for the default ixgbe_build_skb() variant. For the
ixgbe_construct_skb() that is used when legacy-rx buffer mananagement
mode is turned on via ethtool, I found that XDP gets 0 headroom, so
neither xdp_adjust_head() nor xdp_adjust_meta() can be used with this.
Just add a comment with explanation for this operating mode.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf, nfp: add meta data support
Daniel Borkmann [Mon, 25 Sep 2017 00:25:54 +0000 (02:25 +0200)]
bpf, nfp: add meta data support

Implement support for transferring XDP meta data into skb for
nfp driver; before calling into the program, xdp.data_meta points
to xdp.data, where on program return with pass verdict, we call
into skb_metadata_set().

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: improve selftests and add tests for meta pointer
Daniel Borkmann [Mon, 25 Sep 2017 00:25:53 +0000 (02:25 +0200)]
bpf: improve selftests and add tests for meta pointer

Add various test_verifier selftests, and a simple xdp/tc functional
test that is being attached to veths. Also let new versions of clang
use the recently added -mcpu=probe support [1] for the BPF target,
so that it can probe the underlying kernel for BPF insn set extensions.
We could also just set this options always, where older versions just
ignore it and give a note to the user that the -mcpu value is not
supported, but given emitting the note cannot be turned off from clang
side lets not confuse users running selftests with it, thus fallback
to the default generic one when we see that clang doesn't support it.
Also allow CPU option to be overridden in the Makefile from command
line.

  [1] https://github.com/llvm-mirror/llvm/commit/d7276a40d87b89aed89978dec6457a5b8b3a0db5

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: update bpf.h uapi header for tools
Daniel Borkmann [Mon, 25 Sep 2017 00:25:52 +0000 (02:25 +0200)]
bpf: update bpf.h uapi header for tools

Looks like a couple of updates missed to get carried into tools/include/uapi/,
so copy the bpf.h header as usual to pull in latest updates.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: add meta pointer for direct access
Daniel Borkmann [Mon, 25 Sep 2017 00:25:51 +0000 (02:25 +0200)]
bpf: add meta pointer for direct access

This work enables generic transfer of metadata from XDP into skb. The
basic idea is that we can make use of the fact that the resulting skb
must be linear and already comes with a larger headroom for supporting
bpf_xdp_adjust_head(), which mangles xdp->data. Here, we base our work
on a similar principle and introduce a small helper bpf_xdp_adjust_meta()
for adjusting a new pointer called xdp->data_meta. Thus, the packet has
a flexible and programmable room for meta data, followed by the actual
packet data. struct xdp_buff is therefore laid out that we first point
to data_hard_start, then data_meta directly prepended to data followed
by data_end marking the end of packet. bpf_xdp_adjust_head() takes into
account whether we have meta data already prepended and if so, memmove()s
this along with the given offset provided there's enough room.

xdp->data_meta is optional and programs are not required to use it. The
rationale is that when we process the packet in XDP (e.g. as DoS filter),
we can push further meta data along with it for the XDP_PASS case, and
give the guarantee that a clsact ingress BPF program on the same device
can pick this up for further post-processing. Since we work with skb
there, we can also set skb->mark, skb->priority or other skb meta data
out of BPF, thus having this scratch space generic and programmable
allows for more flexibility than defining a direct 1:1 transfer of
potentially new XDP members into skb (it's also more efficient as we
don't need to initialize/handle each of such new members). The facility
also works together with GRO aggregation. The scratch space at the head
of the packet can be multiple of 4 byte up to 32 byte large. Drivers not
yet supporting xdp->data_meta can simply be set up with xdp->data_meta
as xdp->data + 1 as bpf_xdp_adjust_meta() will detect this and bail out,
such that the subsequent match against xdp->data for later access is
guaranteed to fail.

The verifier treats xdp->data_meta/xdp->data the same way as we treat
xdp->data/xdp->data_end pointer comparisons. The requirement for doing
the compare against xdp->data is that it hasn't been modified from it's
original address we got from ctx access. It may have a range marking
already from prior successful xdp->data/xdp->data_end pointer comparisons
though.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobpf: rename bpf_compute_data_end into bpf_compute_data_pointers
Daniel Borkmann [Mon, 25 Sep 2017 00:25:50 +0000 (02:25 +0200)]
bpf: rename bpf_compute_data_end into bpf_compute_data_pointers

Just do the rename into bpf_compute_data_pointers() as we'll add
one more pointer here to recompute.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: bcm63xx_enet: Use setup_timer and mod_timer
Himanshu Jha [Sun, 24 Sep 2017 12:11:24 +0000 (17:41 +0530)]
net: bcm63xx_enet: Use setup_timer and mod_timer

Use setup_timer and mod_timer API instead of structure assignments.

This is done using Coccinelle and semantic patch used
for this as follows:

@@
expression x,y,z,a,b;
@@

-init_timer (&x);
+setup_timer (&x, y, z);
+mod_timer (&a, b);
-x.function = y;
-x.data = z;
-x.expires = b;
-add_timer(&a);

Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoMerge branch 'qed-iWARP-fixes-and-enhancements'
David S. Miller [Tue, 26 Sep 2017 18:22:03 +0000 (11:22 -0700)]
Merge branch 'qed-iWARP-fixes-and-enhancements'

Michal Kalderon says:

====================
qed: iWARP fixes and enhancements

This patch series includes several fixes and enhancements
related to iWARP.

Patch #1 is actually the last of the initial iWARP submission.
It has been delayed until now as I wanted to make sure that qedr
supports iWARP prior to enabling iWARP device detection.

iWARP changes in RDMA tree have been accepted and targeted at
kernel 4.15, therefore, all iWARP fixes for this cycle are
submitted to net-next.

Changes from v1->v2
  - Added "Fixes:" tag to commit message of patch #3
====================

Signed-off by: Michal.Kalderon@cavium.com
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoqed: iWARP - Add check for errors on a SYN packet
Michal Kalderon [Sun, 24 Sep 2017 09:09:45 +0000 (12:09 +0300)]
qed: iWARP - Add check for errors on a SYN packet

A SYN packet which arrives with errors from FW should be dropped.
This required adding an additional field to the ll2
rx completion data.

Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoqed: Fix maximum number of CQs for iWARP
Michal Kalderon [Sun, 24 Sep 2017 09:09:44 +0000 (12:09 +0300)]
qed: Fix maximum number of CQs for iWARP

The maximum number of CQs supported is bound to the number
of connections supported, which differs between RoCE and iWARP.

This fixes a crash that occurred in iWARP when running 1000 sessions
using perftest.

Fixes: 67b40dccc45 ("qed: Implement iWARP initialization, teardown and qp operations")
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoqed: Add iWARP out of order support
Michal Kalderon [Sun, 24 Sep 2017 09:09:43 +0000 (12:09 +0300)]
qed: Add iWARP out of order support

iWARP requires OOO support which is already provided by the ll2
interface (until now was used only for iSCSI offload).
The changes mostly include opening a ll2 dedicated connection for
OOO and notifiying the FW about the handle id.

Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoqed: Add iWARP enablement support
Michal Kalderon [Sun, 24 Sep 2017 09:09:42 +0000 (12:09 +0300)]
qed: Add iWARP enablement support

This patch is the last of the initial iWARP patch series. It
adds the possiblity to actually detect iWARP from the device and enable
it in the critical locations which basically make iWARP available.

It wasn't submitted until now as iWARP hadn't been accepted into
the rdma tree.

Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoldmvsw: Remove redundant unlikely()
Tobias Klauser [Tue, 26 Sep 2017 13:14:15 +0000 (15:14 +0200)]
ldmvsw: Remove redundant unlikely()

IS_ERR() already implies unlikely(), so it can be omitted.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet/mlx5: Remove redundant unlikely()
Tobias Klauser [Tue, 26 Sep 2017 13:13:23 +0000 (15:13 +0200)]
net/mlx5: Remove redundant unlikely()

IS_ERR() already implies unlikely(), so it can be omitted.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agobnxt_en: Remove redundant unlikely()
Tobias Klauser [Tue, 26 Sep 2017 13:12:26 +0000 (15:12 +0200)]
bnxt_en: Remove redundant unlikely()

IS_ERR() already implies unlikely(), so it can be omitted.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agokcm: Remove redundant unlikely()
Tobias Klauser [Tue, 26 Sep 2017 09:22:58 +0000 (11:22 +0200)]
kcm: Remove redundant unlikely()

IS_ERR() already implies unlikely(), so it can be omitted.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoipv6: Remove redundant unlikely()
Tobias Klauser [Tue, 26 Sep 2017 09:22:31 +0000 (11:22 +0200)]
ipv6: Remove redundant unlikely()

IS_ERR() already implies unlikely(), so it can be omitted.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agodatagram: Remove redundant unlikely()
Tobias Klauser [Tue, 26 Sep 2017 09:21:42 +0000 (11:21 +0200)]
datagram: Remove redundant unlikely()

IS_ERR() already implies unlikely(), so it can be omitted.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: ena: Remove redundant unlikely()
Tobias Klauser [Tue, 26 Sep 2017 09:04:23 +0000 (11:04 +0200)]
net: ena: Remove redundant unlikely()

IS_ERR() already implies unlikely(), so it can be omitted.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoneigh: make strucrt neigh_table::entry_size unsigned int
Alexey Dobriyan [Sat, 23 Sep 2017 20:03:04 +0000 (23:03 +0300)]
neigh: make strucrt neigh_table::entry_size unsigned int

Key length can't be negative.

Leave comparisons against nla_len() signed just in case truncated attribute
can sneak in there.

Space savings:

add/remove: 0/0 grow/shrink: 0/7 up/down: 0/-7 (-7)
function                                     old     new   delta
pneigh_delete                                273     272      -1
mlx5e_rep_netevent_event                    1415    1414      -1
mlx5e_create_encap_header_ipv6              1194    1193      -1
mlx5e_create_encap_header_ipv4              1071    1070      -1
cxgb4_l2t_get                               1104    1103      -1
__pneigh_lookup                               69      68      -1
__neigh_create                              2452    2451      -1

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agoneigh: make struct neigh_table::entry_size unsigned int
Alexey Dobriyan [Sat, 23 Sep 2017 20:01:06 +0000 (23:01 +0300)]
neigh: make struct neigh_table::entry_size unsigned int

Neigh entry size can't be negative.

Space savings:

add/remove: 0/0 grow/shrink: 0/5 up/down: 0/-7 (-7)
function                                     old     new   delta
lowpan_neigh_construct                        25      24      -1
clip_seq_sub_iter                            152     151      -1
clip_ioctl                                  1475    1474      -1
clip_constructor                              93      92      -1
__neigh_create                              2455    2452      -3

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agonet: speed up skb_rbtree_purge()
Eric Dumazet [Sat, 23 Sep 2017 19:39:12 +0000 (12:39 -0700)]
net: speed up skb_rbtree_purge()

As measured in my prior patch ("sch_netem: faster rb tree removal"),
rbtree_postorder_for_each_entry_safe() is nice looking but much slower
than using rb_next() directly, except when tree is small enough
to fit in CPU caches (then the cost is the same)

Also note that there is not even an increase of text size :
$ size net/core/skbuff.o.before net/core/skbuff.o
   text    data     bss     dec     hex filename
  40711    1298       0   42009    a419 net/core/skbuff.o.before
  40711    1298       0   42009    a419 net/core/skbuff.o

From: Eric Dumazet <edumazet@google.com>

Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agosch_netem: faster rb tree removal
Eric Dumazet [Sat, 23 Sep 2017 18:07:28 +0000 (11:07 -0700)]
sch_netem: faster rb tree removal

While running TCP tests involving netem storing millions of packets,
I had the idea to speed up tfifo_reset() and did experiments.

I tried the rbtree_postorder_for_each_entry_safe() method that is
used in skb_rbtree_purge() but discovered it was slower than the
current tfifo_reset() method.

I measured time taken to release skbs with three occupation levels :
10^4, 10^5 and 10^6 skbs with three methods :

1) (current 'naive' method)

while ((p = rb_first(&q->t_root))) {
struct sk_buff *skb = netem_rb_to_skb(p);

rb_erase(p, &q->t_root);
rtnl_kfree_skbs(skb, skb);
}

2) Use rb_next() instead of rb_first() in the loop :

p = rb_first(&q->t_root);
while (p) {
struct sk_buff *skb = netem_rb_to_skb(p);

p = rb_next(p);
rb_erase(&skb->rbnode, &q->t_root);
rtnl_kfree_skbs(skb, skb);
}

3) "optimized" method using rbtree_postorder_for_each_entry_safe()

struct sk_buff *skb, *next;

rbtree_postorder_for_each_entry_safe(skb, next,
     &q->t_root, rbnode) {
               rtnl_kfree_skbs(skb, skb);
}
q->t_root = RB_ROOT;

Results :

method_1:while (rb_first()) rb_erase() 10000 skbs in 690378 ns (69 ns per skb)
method_2:rb_first; while (p) { p = rb_next(p); ...}  10000 skbs in 541846 ns (54 ns per skb)
method_3:rbtree_postorder_for_each_entry_safe() 10000 skbs in 868307 ns (86 ns per skb)

method_1:while (rb_first()) rb_erase() 99996 skbs in 7804021 ns (78 ns per skb)
method_2:rb_first; while (p) { p = rb_next(p); ...}  100000 skbs in 5942456 ns (59 ns per skb)
method_3:rbtree_postorder_for_each_entry_safe() 100000 skbs in 11584940 ns (115 ns per skb)

method_1:while (rb_first()) rb_erase() 1000000 skbs in 108577838 ns (108 ns per skb)
method_2:rb_first; while (p) { p = rb_next(p); ...}  1000000 skbs in 82619635 ns (82 ns per skb)
method_3:rbtree_postorder_for_each_entry_safe() 1000000 skbs in 127328743 ns (127 ns per skb)

Method 2) is simply faster, probably because it maintains a smaller
working size set.

Note that this is the method we use in tcp_ofo_queue() already.

I will also change skb_rbtree_purge() in a second patch.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agotun: delete original tun_get() and rename __tun_get() to tun_get()
yuan linyu [Sat, 23 Sep 2017 14:36:52 +0000 (22:36 +0800)]
tun: delete original tun_get() and rename __tun_get() to tun_get()

it seems no need to keep tun_get() and __tun_get() at same time.

Signed-off-by: yuan linyu <Linyu.Yuan@alcatel-sbell.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 years agocxgb4: do DCB state reset in couple of places
Ganesh Goudar [Sat, 23 Sep 2017 10:37:28 +0000 (16:07 +0530)]
cxgb4: do DCB state reset in couple of places

reset the driver's DCB state in couple of places
where it was missing.

Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>