platform/kernel/linux-rpi.git
5 years agodpaa2-eth: Fix Rx classification status
Ioana Ciocoi Radulescu [Tue, 16 Apr 2019 17:13:28 +0000 (17:13 +0000)]
dpaa2-eth: Fix Rx classification status

Set the Rx flow classification enable flag only if key config
operation is successful.

Fixes 3f9b5c9 ("dpaa2-eth: Configure Rx flow classification key")

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonfp: flower: fix implicit fallthrough warning
John Hurley [Tue, 16 Apr 2019 14:04:23 +0000 (15:04 +0100)]
nfp: flower: fix implicit fallthrough warning

The nfp_flower_copy_pre_actions function introduces a case statement with
an intentional fallthrough. However, this generates a warning if built
with the -Wimplicit-fallthrough flag.

Remove the warning by adding a fall through comment.

Fixes: 1c6952ca587d ("nfp: flower: generate merge flow rule")
Signed-off-by: John Hurley <john.hurley@netronome.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reviewed-by: Jiong Wang <jiong.wang@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: phy: micrel: add Asym Pause workaround
Antoine Tenart [Tue, 16 Apr 2019 10:10:20 +0000 (12:10 +0200)]
net: phy: micrel: add Asym Pause workaround

The Micrel KSZ9031 PHY may fail to establish a link when the Asymmetric
Pause capability is set. This issue is described in a Silicon Errata
(DS80000691D or DS80000692D), which advises to always disable the
capability. This patch implements the workaround by defining a KSZ9031
specific get_feature callback to force the Asymmetric Pause capability
bit to be cleared.

This fixes issues where the link would not come up at boot time, or when
the Asym Pause bit was set later on.

Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.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>
5 years agoMerge branch 'bnx2x-Support-for-timestamping-in-P2P-mode'
David S. Miller [Wed, 17 Apr 2019 04:34:48 +0000 (21:34 -0700)]
Merge branch 'bnx2x-Support-for-timestamping-in-P2P-mode'

Sudarsana Reddy Kalluru says:

====================
bnx2x: Support for timestamping in P2P mode.

The patch series adds driver support for timestamping the ptp packets
in peer-delay (P2P) mode.
 - Patch (1) performs the code cleanup.
 - Patch (2) adds the required implementation.

Please consider applying it 'net-next' tree.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agobnx2x: Add support for detection of P2P event packets.
Sudarsana Reddy Kalluru [Tue, 16 Apr 2019 08:46:13 +0000 (01:46 -0700)]
bnx2x: Add support for detection of P2P event packets.

The patch adds support for detecting the P2P (peer-to-peer) event packets.
This is required for timestamping the PTP packets in peer delay mode.
Unmask the below bits (set to 0) for device to detect the p2p packets.
  NIG_REG_P0/1_LLH_PTP_PARAM_MASK
  NIG_REG_P0/1_TLLH_PTP_PARAM_MASK
    bit 1 - IPv4 DA 1 of 224.0.0.107.
    bit 3 - IPv6 DA 1 of 0xFF02:0:0:0:0:0:0:6B.
    bit 9 - MAC DA 1 of 0x01-80-C2-00-00-0E.
  NIG_REG_P0/1_LLH_PTP_RULE_MASK
  NIG_REG_P0/1_TLLH_PTP_RULE_MASK
    bit 2 - {IPv4 DA 1; UDP DP 0}
    bit 6 - MAC Ethertype 0 of 0x88F7.
    bit 9 - MAC DA 1 of 0x01-80-C2-00-00-0E.

Signed-off-by: Sudarsana Reddy Kalluru <skalluru@marvell.com>
Signed-off-by: Ariel Elior <aelior@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agobnx2x: Replace magic numbers with macro definitions.
Sudarsana Reddy Kalluru [Tue, 16 Apr 2019 08:46:12 +0000 (01:46 -0700)]
bnx2x: Replace magic numbers with macro definitions.

This patch performs code cleanup by defining macros for the ptp-timestamp
filters.

Signed-off-by: Sudarsana Reddy Kalluru <skalluru@marvell.com>
Signed-off-by: Ariel Elior <aelior@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoxen-netfront: mark expected switch fall-through
Gustavo A. R. Silva [Mon, 15 Apr 2019 21:11:41 +0000 (16:11 -0500)]
xen-netfront: mark expected switch fall-through

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

This patch fixes the following warning:

drivers/net/xen-netfront.c: In function ‘netback_changed’:
drivers/net/xen-netfront.c:2038:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
   if (dev->state == XenbusStateClosed)
      ^
drivers/net/xen-netfront.c:2041:2: note: here
  case XenbusStateClosing:
  ^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

Notice that, in this particular case, the code comment is modified
in accordance with what GCC is expecting to find.

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'hsr-next'
David S. Miller [Tue, 16 Apr 2019 00:22:02 +0000 (17:22 -0700)]
Merge branch 'hsr-next'

Murali Karicheri says:

====================
net: hsr: updates from internal tree

This series picks commit from our internal kernel tree.
Patch 1/3 fixes a file name issue introduced in my previous
series.

History:
  v2: fixed patch 3/3 by moving stats update to inside hsr_forward_skb()
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hsr: add tx stats for master interface
Murali Karicheri [Mon, 15 Apr 2019 15:36:03 +0000 (11:36 -0400)]
net: hsr: add tx stats for master interface

Add tx stats to hsr interface. Without this
ifconfig for hsr interface doesn't show tx packet stats.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hsr: fix debugfs path to support multiple interfaces
Murali Karicheri [Mon, 15 Apr 2019 15:36:02 +0000 (11:36 -0400)]
net: hsr: fix debugfs path to support multiple interfaces

Fix the path of hsr debugfs root directory to use the net device
name so that it can work with multiple interfaces. While at it,
also fix some typos.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hsr: fix naming of file and functions
Murali Karicheri [Mon, 15 Apr 2019 15:36:01 +0000 (11:36 -0400)]
net: hsr: fix naming of file and functions

Fix the file name and functions to match with existing implementation.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: phy: switch drivers to use dynamic feature detection
Heiner Kallweit [Fri, 12 Apr 2019 18:47:03 +0000 (20:47 +0200)]
net: phy: switch drivers to use dynamic feature detection

Recently genphy_read_abilities() has been added that dynamically detects
clause 22 PHY abilities. I *think* this detection should work with all
supported PHY's, at least for the ones with basic features sets, i.e.
PHY_BASIC_FEATURES and PHY_GBIT_FEATURES. So let's remove setting these
features explicitly and rely on phylib feature detection.

I don't have access to most of these PHY's, therefore I'd appreciate
regression testing.

v2:
- make the feature constant a comment so that readers know which
  features are supported by the respective PHY

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'nfp-Flower-flow-merging'
David S. Miller [Mon, 15 Apr 2019 22:45:36 +0000 (15:45 -0700)]
Merge branch 'nfp-Flower-flow-merging'

Simon Horman says:

====================
nfp: Flower flow merging

John Hurley says,

These patches deal with 'implicit recirculation' on the NFP. This is a
firmware feature whereby a packet egresses to an 'internal' port meaning
that it will recirculate back to the header extract phase with the
'internal' port now marked as its ingress port. This internal port can
then be matched on by another rule. This process simulates how OvS
datapath outputs to an internal port. The FW traces the packet's
recirculation route and sends a 'merge hint' to the driver telling it
which flows it matched against. The driver can then decide if these flows
can be merged to a single rule and offloaded.

The patches deal with the following issues:

- assigning/freeing IDs to/from each of these new internal ports
- offloading rules that match on internal ports
- offloading neighbour table entries whose egress port is internal
- handling fallback traffic with an internal port as ingress
- using merge hints to create 'faster path' flows and tracking stats etc.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonfp: flower: offload merge flows
John Hurley [Mon, 15 Apr 2019 14:56:03 +0000 (16:56 +0200)]
nfp: flower: offload merge flows

A merge flow is formed from 2 sub flows. The match fields of the merge are
the same as the first sub flow that has formed it, with the actions being
a combination of the first and second sub flow. Therefore, a merge flow
should replace sub flow 1 when offloaded.

Offload valid merge flows by using a new 'flow mod' message type to
replace an existing offloaded rule. Track the deletion of sub flows that
are linked to a merge flow and revert offloaded merge rules if required.

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>
5 years agonfp: flower: support stats update for merge flows
John Hurley [Mon, 15 Apr 2019 14:56:02 +0000 (16:56 +0200)]
nfp: flower: support stats update for merge flows

With the merging of 2 sub flows, a new 'merge' flow will be created and
written to FW. The TC layer is unaware that the merge flow exists and will
request stats from the sub flows. Conversely, the FW treats a merge rule
the same as any other rule and sends stats updates to the NFP driver.

Add links between merge flows and their sub flows. Use these links to pass
merge flow stats updates from FW to the underlying sub flows, ensuring TC
stats requests are handled correctly. The updating of sub flow stats is
done on (the less time critcal) TC stats requests rather than on FW stats
update.

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>
5 years agonfp: flower: generate merge flow rule
John Hurley [Mon, 15 Apr 2019 14:56:01 +0000 (16:56 +0200)]
nfp: flower: generate merge flow rule

When combining 2 sub_flows to a single 'merge flow' (assuming the merge is
valid), the merge flow should contain the same match fields as sub_flow 1
with actions derived from a combination of sub_flows 1 and 2. This action
list should have all actions from sub_flow 1 with the exception of the
output action that triggered the 'implicit recirculation' by sending to
an internal port, followed by all actions of sub_flow 2. Any pre-actions
in either sub_flow should feature at the start of the action list.

Add code to generate a new merge flow and populate the match and actions
fields based on the sub_flows. The offloading of the flow is left to
future patches.

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>
5 years agonfp: flower: validate merge hint flows
John Hurley [Mon, 15 Apr 2019 14:56:00 +0000 (16:56 +0200)]
nfp: flower: validate merge hint flows

Two flows can be merged if the second flow (after recirculation) matches
on bits that are either matched on or explicitly set by the first flow.
This means that if a packet hits flow 1 and recirculates then it is
guaranteed to hit flow 2.

Add a 'can_merge' function that determines if 2 sub_flows in a merge hint
can be validly merged to a single flow.

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>
5 years agonfp: flower: handle merge hint messages
John Hurley [Mon, 15 Apr 2019 14:55:59 +0000 (16:55 +0200)]
nfp: flower: handle merge hint messages

If a merge hint is received containing 2 flows that are matched via an
implicit recirculation (sending to and matching on an internal port), fw
reports that the flows (called sub_flows) may be able to be combined to a
single flow.

Add infastructure to accept and process merge hint messages. The actual
merging of the flows is left as a stub call.

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>
5 years agonfp: flower: get flows by host context
John Hurley [Mon, 15 Apr 2019 14:55:58 +0000 (16:55 +0200)]
nfp: flower: get flows by host context

Each flow is given a context ID that the fw uses (along with its cookie)
to identity the flow. The flows stats are updated by the fw via this ID
which is a reference to a pre-allocated array entry.

In preparation for flow merge code, enable the nfp_fl_payload structure to
be accessed via this stats context ID. Rather than increasing the memory
requirements of the pre-allocated array, add a new rhashtable to associate
each active stats context ID with its rule payload.

While adding new code to the compile metadata functions, slightly
restructure the existing function to allow for cleaner, easier to read
error handling.

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>
5 years agonfp: flower: allow tunnels to output to internal port
John Hurley [Mon, 15 Apr 2019 14:55:57 +0000 (16:55 +0200)]
nfp: flower: allow tunnels to output to internal port

The neighbour table in the FW only accepts next hop entries if the egress
port is an nfp repr. Modify this to allow the next hop to be an internal
port. This means that if a packet is to egress to that port, it will
recirculate back into the system with the internal port becoming its
ingress port.

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>
5 years agonfp: flower: support fallback packets from internal ports
John Hurley [Mon, 15 Apr 2019 14:55:56 +0000 (16:55 +0200)]
nfp: flower: support fallback packets from internal ports

FW may receive a packet with its ingress port marked as an internal port.
If a rule does not exist to match on this port, the packet will be sent to
the NFP driver. Modify the flower app to detect packets from such internal
ports and convert the ingress port to the correct kernel space netdev.

At this point, it is assumed that fallback packets from internal ports are
to be sent out said port. Therefore, set the redir_egress bool to true on
detection of these ports.

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>
5 years agonfp: allow fallback packets from non-reprs
John Hurley [Mon, 15 Apr 2019 14:55:55 +0000 (16:55 +0200)]
nfp: allow fallback packets from non-reprs

Currently, it is assumed that fallback packets will be from reprs. Modify
this to allow an app to receive non-repr ports from the fallback channel -
e.g. from an internal port. If such a packet is received, do not update
repr stats.

Change the naming function calls so as not to imply it will always be a
repr netdev returned. Add the option to set a bool value to redirect a
fallback packet out the returned port rather than RXing it. Setting of
this bool in subsequent patches allows the handling of packets falling
back when they are due to egress an internal port.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonfp: flower: allow offloading of matches on 'internal' ports
John Hurley [Mon, 15 Apr 2019 14:55:54 +0000 (16:55 +0200)]
nfp: flower: allow offloading of matches on 'internal' ports

Recent FW modifications allow the offloading of non repr ports. These
ports exist internally on the NFP. So if a rule outputs to an 'internal'
port, then the packet will recirculate back into the system but will now
have this internal port as it's incoming port. These ports are indicated
by a specific type field combined with an 8 bit port id.

Add private app data to assign additional port ids for use in offloads.
Provide functions to lookup or create new ids when a rule attempts to
match on an internal netdev - the only internal netdevs currently
supported are of type openvswitch. Have a netdev notifier to release
port ids on netdev unregister.

OvS offloads rules that match on internal ports as TC egress filters.
Ensure that such rules are accepted by the driver.

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>
5 years agonfp: flower: turn on recirc and merge hint support in firmware
John Hurley [Mon, 15 Apr 2019 14:55:53 +0000 (16:55 +0200)]
nfp: flower: turn on recirc and merge hint support in firmware

Write to a FW symbol to indicate that the driver supports flow merging. If
this symbol does not exist then flow merging and recirculation is not
supported on the FW. If support is available, add a stub to deal with FW
to kernel merge hint messages.

Full flow merging requires the firmware to support of flow mods. If it
does not, then do not attempt to 'turn on' flow merging.

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>
5 years agoMerge branch 'hns3-next'
David S. Miller [Mon, 15 Apr 2019 20:39:19 +0000 (13:39 -0700)]
Merge branch 'hns3-next'

Huazhong Tan says:

====================
net: hns3: fixes sparse: warning and type error

This patchset fixes a sparse warning and a overflow problem.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: fix for vport->bw_limit overflow problem
Yunsheng Lin [Mon, 15 Apr 2019 13:48:39 +0000 (21:48 +0800)]
net: hns3: fix for vport->bw_limit overflow problem

When setting vport->bw_limit to hdev->tm_info.pg_info[0].bw_limit
in hclge_tm_vport_tc_info_update, vport->bw_limit can be as big as
HCLGE_ETHER_MAX_RATE (100000), which can not fit into u16 (65535).

So this patch fixes it by using u32 for vport->bw_limit.

Fixes: 848440544b41 ("net: hns3: Add support of TX Scheduler & Shaper to HNS3 driver")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: fix sparse: warning when calling hclge_set_vlan_filter_hw()
Jian Shen [Mon, 15 Apr 2019 13:48:38 +0000 (21:48 +0800)]
net: hns3: fix sparse: warning when calling hclge_set_vlan_filter_hw()

The input parameter "proto" in function hclge_set_vlan_filter_hw()
is asked to be __be16, but got u16 when calling it in function
hclge_update_port_base_vlan_cfg().

This patch fixes it by converting it with htons().

Reported-by: kbuild test robot <lkp@intel.com>
Fixes: 21e043cd8124 ("net: hns3: fix set port based VLAN for PF")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'sctp-fully-support-memory-accounting'
David S. Miller [Mon, 15 Apr 2019 20:36:51 +0000 (13:36 -0700)]
Merge branch 'sctp-fully-support-memory-accounting'

Xin Long says:

====================
sctp: fully support memory accounting

sctp memory accounting is added in this patchset by using
these kernel APIs on send side:

  - sk_mem_charge()
  - sk_mem_uncharge()
  - sk_wmem_schedule()
  - sk_under_memory_pressure()
  - sk_mem_reclaim()

and these on receive side:

  - sk_mem_charge()
  - sk_mem_uncharge()
  - sk_rmem_schedule()
  - sk_under_memory_pressure()
  - sk_mem_reclaim()

With sctp memory accounting, we can limit the memory allocation by
either sysctl:

  # sysctl -w net.sctp.sctp_mem="10 20 50"

or cgroup:

  # echo $((8<<14)) > \
    /sys/fs/cgroup/memory/sctp_mem/memory.kmem.tcp.limit_in_bytes

When the socket is under memory pressure, the send side will block
and wait, while the receive side will renege or drop.

v1->v2:
  - add the missing Reported/Tested/Acked/-bys.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosctp: implement memory accounting on rx path
Xin Long [Mon, 15 Apr 2019 09:15:07 +0000 (17:15 +0800)]
sctp: implement memory accounting on rx path

sk_forward_alloc's updating is also done on rx path, but to be consistent
we change to use sk_mem_charge() in sctp_skb_set_owner_r().

In sctp_eat_data(), it's not enough to check sctp_memory_pressure only,
which doesn't work for mem_cgroup_sockets_enabled, so we change to use
sk_under_memory_pressure().

When it's under memory pressure, sk_mem_reclaim() and sk_rmem_schedule()
should be called on both RENEGE or CHUNK DELIVERY path exit the memory
pressure status as soon as possible.

Note that sk_rmem_schedule() is using datalen to make things easy there.

Reported-by: Matteo Croce <mcroce@redhat.com>
Tested-by: Matteo Croce <mcroce@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosctp: implement memory accounting on tx path
Xin Long [Mon, 15 Apr 2019 09:15:06 +0000 (17:15 +0800)]
sctp: implement memory accounting on tx path

Now when sending packets, sk_mem_charge() and sk_mem_uncharge() have been
used to set sk_forward_alloc. We just need to call sk_wmem_schedule() to
check if the allocated should be raised, and call sk_mem_reclaim() to
check if the allocated should be reduced when it's under memory pressure.

If sk_wmem_schedule() returns false, which means no memory is allowed to
allocate, it will block and wait for memory to become available.

Note different from tcp, sctp wait_for_buf happens before allocating any
skb, so memory accounting check is done with the whole msg_len before it
too.

Reported-by: Matteo Croce <mcroce@redhat.com>
Tested-by: Matteo Croce <mcroce@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'mlxsw-Add-neighbour-offload-indication'
David S. Miller [Mon, 15 Apr 2019 20:29:21 +0000 (13:29 -0700)]
Merge branch 'mlxsw-Add-neighbour-offload-indication'

Ido Schimmel says:

====================
mlxsw: Add neighbour offload indication

Neighbour entries are programmed to the device's table so that the
correct destination MAC will be specified in a packet after it was
routed.

Despite being programmed to the device and unlike routes and FDB
entries, neighbour entries are currently not marked as offloaded. This
patchset changes that.

Patch #1 is a preparatory patch to make sure we only mark a neighbour as
offloaded in case it was successfully programmed to the device.

Patch #2 sets the offload indication on neighbours.

Patch #3 adds a test to verify above mentioned functionality.

Patched iproute2 version that prints the offload indication is available
here [1].

[1] https://github.com/idosch/iproute2/tree/idosch-next
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoselftests: mlxsw: Test neighbour offload indication
Ido Schimmel [Sun, 14 Apr 2019 18:57:50 +0000 (18:57 +0000)]
selftests: mlxsw: Test neighbour offload indication

Test that neighbour entries are marked as offloaded.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agomlxsw: spectrum_router: Add neighbour offload indication
Ido Schimmel [Sun, 14 Apr 2019 18:57:49 +0000 (18:57 +0000)]
mlxsw: spectrum_router: Add neighbour offload indication

In a similar fashion to routes and FDB entries, the neighbour table is
reflected to the device.

Set an offload indication on the neighbour in case it was programmed to
the device.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agomlxsw: spectrum_router: Propagate neighbour update errors
Ido Schimmel [Sun, 14 Apr 2019 18:57:47 +0000 (18:57 +0000)]
mlxsw: spectrum_router: Propagate neighbour update errors

Next patch will add offload indication to neighbours, but the indication
should only be altered in case the neighbour was successfully added to /
deleted from the device.

Propagate neighbour update errors, so that they could be taken into
account by the next patch.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
David S. Miller [Mon, 15 Apr 2019 19:07:35 +0000 (12:07 -0700)]
Merge git://git./linux/kernel/git/pablo/nf-next

Pablo Neira Ayuso says:

====================
Netfilter/IPVS updates for net-next

The following patchset contains Netfilter updates for net-next:

1) Remove the broute pseudo hook, implement this from the bridge
   prerouting hook instead. Now broute becomes real table in ebtables,
   from Florian Westphal. This also includes a size reduction patch for the
   bridge control buffer area via squashing boolean into bitfields and
   a selftest.

2) Add OS passive fingerprint version matching, from Fernando Fernandez.

3) Support for gue encapsulation for IPVS, from Jacky Hu.

4) Add support for NAT to the inet family, from Florian Westphal.
   This includes support for masquerade, redirect and nat extensions.

5) Skip interface lookup in flowtable, use device in the dst object.

6) Add jiffies64_to_msecs() and use it, from Li RongQing.

7) Remove unused parameter in nf_tables_set_desc_parse(), from Colin Ian King.

8) Statify several functions, patches from YueHaibing and Florian Westphal.

9) Add an optimized version of nf_inet_addr_cmp(), from Li RongQing.

10) Merge route extension to core, also from Florian.

11) Use IS_ENABLED(CONFIG_NF_NAT) instead of NF_NAT_NEEDED, from Florian.

12) Merge ip/ip6 masquerade extensions, from Florian. This includes
    netdevice notifier unification.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agobridge: only include nf_queue.h if needed
Stephen Rothwell [Sat, 13 Apr 2019 04:03:36 +0000 (14:03 +1000)]
bridge: only include nf_queue.h if needed

After merging the netfilter-next tree, today's linux-next build (powerpc
ppc44x_defconfig) failed like this:

In file included from net/bridge/br_input.c:19:
include/net/netfilter/nf_queue.h:16:23: error: field 'state' has incomplete type
  struct nf_hook_state state;
                       ^~~~~

Fixes: 971502d77faa ("bridge: netfilter: unroll NF_HOOK helper in bridge input path")
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
5 years agor8169: change irq handler to always trigger NAPI polling
Heiner Kallweit [Sun, 14 Apr 2019 09:48:39 +0000 (11:48 +0200)]
r8169: change irq handler to always trigger NAPI polling

This check isn't really needed and we can simplify the code and save
some CPU cycles by removing it. Only in case of an error none of these
bits are set, and calling the NAPI callback doesn't hurt in this case.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'r8169-phy-func-ptr-arrays'
David S. Miller [Sun, 14 Apr 2019 20:50:05 +0000 (13:50 -0700)]
Merge branch 'r8169-phy-func-ptr-arrays'

Heiner Kallweit says:

====================
r8169: create function pointer arrays for PHY and chip hw init functions

Using function pointer arrays makes the code easier to read and better
maintainable. AFAIK function pointer arrays cause some performance
drawback due to Spectre mitigation, but we're not in a hot path.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agor8169: create function pointer array for chip hw init functions
Heiner Kallweit [Sun, 14 Apr 2019 08:32:07 +0000 (10:32 +0200)]
r8169: create function pointer array for chip hw init functions

Using a function pointer array makes this easier to read and better
maintainable.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agor8169: create function pointer array for PHY init functions
Heiner Kallweit [Sun, 14 Apr 2019 08:30:24 +0000 (10:30 +0200)]
r8169: create function pointer array for PHY init functions

Using a function pointer array makes this easier to read and better
maintainable. AFAIK function pointer arrays cause some performance
drawback due to Spectre mitigation, but we're not in a hot path here.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'hns3-next'
David S. Miller [Sun, 14 Apr 2019 20:47:35 +0000 (13:47 -0700)]
Merge branch 'hns3-next'

Huazhong Tan says:

====================
code optimizations & bugfixes for HNS3 driver

This patch-set includes code optimizations and bugfixes for the HNS3
ethernet controller driver.

[patch 1/12 - 4/12] optimizes the VLAN freature and adds support for port
based VLAN, fixes some related bugs about the current implementation.

[patch 5/12 - 12/12] includes some other code optimizations for the HNS3
ethernet controller driver.

Change log:
V1->V2: modifies some patches' commint log and code.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: code optimization for command queue' spin lock
Peng Li [Sun, 14 Apr 2019 01:47:46 +0000 (09:47 +0800)]
net: hns3: code optimization for command queue' spin lock

This patch removes some redundant BH disable when initializing
and uninitializing command queue.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: free the pending skb when clean RX ring
Peng Li [Sun, 14 Apr 2019 01:47:45 +0000 (09:47 +0800)]
net: hns3: free the pending skb when clean RX ring

If there is pending skb in RX flow when close the port, and the
pending buffer is not cleaned, the new packet will be added to
the pending skb when the port opens again, and the first new
packet has error data.

This patch cleans the pending skb when clean RX ring.

Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: do not initialize MDIO bus when PHY is inexistent
Jian Shen [Sun, 14 Apr 2019 01:47:44 +0000 (09:47 +0800)]
net: hns3: do not initialize MDIO bus when PHY is inexistent

For some cases, PHY may not be connected to MDIO bus, then
the driver will initialize fail since MDIO bus initialization
fails.

This patch fixes it by skipping the MDIO bus initialization
when PHY is inexistent.

Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: set dividual reset level for all RAS and MSI-X errors
Weihang Li [Sun, 14 Apr 2019 01:47:43 +0000 (09:47 +0800)]
net: hns3: set dividual reset level for all RAS and MSI-X errors

According to hardware description, reset level that should be
triggered are not consistent in a module. For example, in SSU
common errors, the first two bits has no need to do reset,
but the other bits need global reset.

This patch sets separate reset level for all RAS and MSI-X
interrupts by adding a reset_lvel field in struct hclge_hw_error,
and fixes some incorrect reset level.

Signed-off-by: Weihang Li <liweihang@hisilicon.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: divide shared buffer between TC
Yunsheng Lin [Sun, 14 Apr 2019 01:47:42 +0000 (09:47 +0800)]
net: hns3: divide shared buffer between TC

Currently hardware may have not enough buffer to receive packet
when it has used more than two MPS(maximum packet size) of
buffer, but there are still a lot of shared buffer left unused
when TC num is small.

This patch divides shared buffer to be used between TC when
the port supports DCB, and adjusts the waterline and threshold
according to user manual for the port that does not support
DCB.

This patch also change hclge_get_tc_num's return type to u32
to avoid signed-unsigned mix with divide.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: always assume no drop TC for performance reason
Yunsheng Lin [Sun, 14 Apr 2019 01:47:41 +0000 (09:47 +0800)]
net: hns3: always assume no drop TC for performance reason

Currently RX shared buffer' threshold size for speific TC is
set to smaller value when the TC's PFC is not enabled, which may
cause performance problem because hardware may not have enough
hardware buffer when PFC is not enabled.

This patch sets the same threshold size for all TC no matter if
the specific TC's PFC is enabled.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: add hns3_gro_complete for HW GRO process
Yunsheng Lin [Sun, 14 Apr 2019 01:47:40 +0000 (09:47 +0800)]
net: hns3: add hns3_gro_complete for HW GRO process

When a GRO packet is received by driver, the cwr field in the
struct tcphdr needs to be checked to decide whether to set the
SKB_GSO_TCP_ECN for skb_shinfo(skb)->gso_type.

So this patch adds hns3_gro_complete to do that, and adds the
hns3_handle_bdinfo to handle the hns3_gro_complete and
hns3_rx_checksum.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: minor refactor for hns3_rx_checksum
Yunsheng Lin [Sun, 14 Apr 2019 01:47:39 +0000 (09:47 +0800)]
net: hns3: minor refactor for hns3_rx_checksum

Change the parameters of hns3_rx_checksum to be more specific to
what is used internally, rather than passing in a pointer to the
whole hns3_desc. Reduces duplicate code and bring this function
inline with the approach used in hns3_set_gro_param.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: fix set port based VLAN issue for VF
Jian Shen [Sun, 14 Apr 2019 01:47:38 +0000 (09:47 +0800)]
net: hns3: fix set port based VLAN issue for VF

In original codes, ndo_set_vf_vlan() in hns3 driver was implemented
wrong. It adds or removes VLAN into VLAN filter for VF, but VF is
unaware of it.

This patch fixes it. When VF loads up, it firstly queries the port
based VLAN state from PF. When user change port based VLAN state
from PF, PF firstly checks whether the VF is alive. If the VF is
alive, then PF notifies the VF the modification; otherwise PF
configure the port based VLAN state directly.

Fixes: 46a3df9f9718 ("net: hns3: Add HNS3 Acceleration Engine & Compatibility Layer Support")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: fix set port based VLAN for PF
Jian Shen [Sun, 14 Apr 2019 01:47:37 +0000 (09:47 +0800)]
net: hns3: fix set port based VLAN for PF

In original codes, ndo_set_vf_vlan() in hns3 driver was implemented
wrong. It adds or removes VLAN into VLAN filter for VF, but VF is
unaware of it.

Indeed, ndo_set_vf_vlan() is expected to enable or disable port based
VLAN (hardware inserts a specified VLAN tag to all TX packets for a
specified VF) . When enable port based VLAN, we use port based VLAN id
as VLAN filter entry. When disable port based VLAN, we use VLAN id of
VLAN device.

This patch fixes it for PF, enable/disable port based VLAN when calls
ndo_set_vf_vlan().

Fixes: 46a3df9f9718 ("net: hns3: Add HNS3 Acceleration Engine & Compatibility Layer Support")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: fix VLAN offload handle for VLAN inserted by port
Jian Shen [Sun, 14 Apr 2019 01:47:36 +0000 (09:47 +0800)]
net: hns3: fix VLAN offload handle for VLAN inserted by port

Currently, in TX direction, driver implements the TX VLAN offload
by checking the VLAN header in skb, and filling it into TX descriptor.
Usually it works well, but if enable inserting VLAN header based on
port, it may conflict when out_tag field of TX descriptor is already
used, and cause RAS error.

In RX direction, hardware supports stripping max two VLAN headers.
For vlan_tci in skb can only store one VLAN tag, when RX VLAN offload
enabled, driver tells hardware to strip one VLAN header from RX
packet; when RX VLAN offload disabled, driver tells hardware not to
strip VLAN header from RX packet. Now if port based insert VLAN
enabled, all RX packets will have the port based VLAN header. This
header is useless for stack, driver needs to ask hardware to strip
it. Unfortunately, hardware can't drop this VLAN header, and always
fill it into RX descriptor, so driver has to identify and drop it.

Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: hns3: modify VLAN initialization to be compatible with port based VLAN
Jian Shen [Sun, 14 Apr 2019 01:47:35 +0000 (09:47 +0800)]
net: hns3: modify VLAN initialization to be compatible with port based VLAN

Our hardware supports inserting a specified VLAN header for each
function when sending packets. User can enable it with command
"ip link set <devname> vf  <vfid> vlan <vlan id>".
For this VLAN header is inserted by hardware, not from stack,
hardware also needs to strip it from received packets before
sending to stack.  In this case, driver needs to tell
hardware which VLAN to insert or strip.

The current VLAN initialization doesn't allow inserting
VLAN header by hardware, this patch modifies it, in order be
compatible with VLAN inserted base on port.

Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Huazhong Tan <tanhuazhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'net-phy-shrink-PHY-settings-array-and-add-200Gbps-support'
David S. Miller [Sun, 14 Apr 2019 20:37:06 +0000 (13:37 -0700)]
Merge branch 'net-phy-shrink-PHY-settings-array-and-add-200Gbps-support'

Heiner Kallweit says:

====================
net: phy: shrink PHY settings array and add 200Gbps support

The definition of array settings[] is quite lengthy meanwhile. Add a
macro to shrink the definition.

When doing this I saw that the new 200Gbps modes and few 100Gbps/50Gbps
modes aren't supported in phylib yet. So add this.

To avoid ethtool and phylib mode definitions getting out of sync, add
a build bug to check for this.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agophy: warn if phylib and ethtool PHY mode definitions are out of sync
Heiner Kallweit [Sat, 13 Apr 2019 18:53:43 +0000 (20:53 +0200)]
phy: warn if phylib and ethtool PHY mode definitions are out of sync

If new PHY modes are added people may miss to update all relevant places
in the kernel. Therefore add a build bug check for new modes in enum
ethtool_link_mode_bit_indices that haven't been added to phylib yet.

Suggested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: phy: add support for new modes in phylib
Heiner Kallweit [Sat, 13 Apr 2019 18:50:24 +0000 (20:50 +0200)]
net: phy: add support for new modes in phylib

Recently new modes have been added to ethtool.h, but the related
extension to phylib hasn't been done yet. So add support for these
modes.

v2:
- add missing 100Gbps and 50Gbps modes

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: phy: shrink PHY settings array
Heiner Kallweit [Sat, 13 Apr 2019 18:48:55 +0000 (20:48 +0200)]
net: phy: shrink PHY settings array

The definition of array settings[] is quite lengthy meanwhile. Add a
macro to shrink the definition.

v2:
- Fix an indentation issue

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'rhashtable-bit-locking-m68k'
David S. Miller [Sat, 13 Apr 2019 00:34:46 +0000 (17:34 -0700)]
Merge branch 'rhashtable-bit-locking-m68k'

NeilBrown says:

====================
Fix rhashtable bit-locking for m68k

As reported by Guenter Roeck, the new rhashtable bit-locking
doesn't work on m68k as it only requires 2-byte alignment, so BIT(1)
is addresses is not unused.

We current use BIT(0) to identify a NULLS marker, but that is only
needed in ->next pointers.  The bucket head does not need a NULLS
marker, so the lsb there can be used for locking.

the first 4 patches make some small improvements and re-arrange some
code.  The final patch converts to using only BIT(0) for these two
different special purposes.

I had previously suggested dropping the series until I fix it.  Given
that this was fairly easy, I retract that I think it best simply to
add these patches to fix the code.
====================

Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agorhashtable: use BIT(0) for locking.
NeilBrown [Fri, 12 Apr 2019 01:52:08 +0000 (11:52 +1000)]
rhashtable: use BIT(0) for locking.

As reported by Guenter Roeck, the new bit-locking using
BIT(1) doesn't work on the m68k architecture.  m68k only requires
2-byte alignment for words and longwords, so there is only one
unused bit in pointers to structs - We current use two, one for the
NULLS marker at the end of the linked list, and one for the bit-lock
in the head of the list.

The two uses don't need to conflict as we never need the head of the
list to be a NULLS marker - the marker is only needed to check if an
object has moved to a different table, and the bucket head cannot
move.  The NULLS marker is only needed in a ->next pointer.

As we already have different types for the bucket head pointer (struct
rhash_lock_head) and the ->next pointers (struct rhash_head), it is
fairly easy to treat the lsb differently in each.

So: Initialize buckets heads to NULL, and use the lsb for locking.
When loading the pointer from the bucket head, if it is NULL (ignoring
the lock big), report as being the expected NULLS marker.
When storing a value into a bucket head, if it is a NULLS marker,
store NULL instead.

And convert all places that used bit 1 for locking, to use bit 0.

Fixes: 8f0db018006a ("rhashtable: use bit_spin_locks to protect hash bucket.")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agorhashtable: replace rht_ptr_locked() with rht_assign_locked()
NeilBrown [Fri, 12 Apr 2019 01:52:08 +0000 (11:52 +1000)]
rhashtable: replace rht_ptr_locked() with rht_assign_locked()

The only times rht_ptr_locked() is used, it is to store a new
value in a bucket-head.  This is the only time it makes sense
to use it too.  So replace it by a function which does the
whole task:  Sets the lock bit and assigns to a bucket head.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agorhashtable: move dereference inside rht_ptr()
NeilBrown [Fri, 12 Apr 2019 01:52:08 +0000 (11:52 +1000)]
rhashtable: move dereference inside rht_ptr()

Rather than dereferencing a pointer to a bucket and then passing the
result to rht_ptr(), we now pass in the pointer and do the dereference
in rht_ptr().

This requires that we pass in the tbl and hash as well to support RCU
checks, and means that the various rht_for_each functions can expect a
pointer that can be dereferenced without further care.

There are two places where we dereference a bucket pointer
where there is no testable protection - in each case we know
that we much have exclusive access without having taken a lock.
The previous code used rht_dereference() to pretend that holding
the mutex provided protects, but holding the mutex never provides
protection for accessing buckets.

So instead introduce rht_ptr_exclusive() that can be used when
there is known to be exclusive access without holding any locks.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agorhashtable: reorder some inline functions and macros.
NeilBrown [Fri, 12 Apr 2019 01:52:08 +0000 (11:52 +1000)]
rhashtable: reorder some inline functions and macros.

This patch only moves some code around, it doesn't
change the code at all.
A subsequent patch will benefit from this as it needs
to add calls to functions which are now defined before the
call-site, but weren't before.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agorhashtable: fix some __rcu annotation errors
NeilBrown [Fri, 12 Apr 2019 01:52:07 +0000 (11:52 +1000)]
rhashtable: fix some __rcu annotation errors

With these annotations, the rhashtable now gets no
warnings when compiled with "C=1" for sparse checking.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agorhashtable: use struct_size() in kvzalloc()
Gustavo A. R. Silva [Thu, 11 Apr 2019 23:43:06 +0000 (18:43 -0500)]
rhashtable: use struct_size() in kvzalloc()

One of the more common cases of allocation size calculations is finding
the size of a structure that has a zero-sized array at the end, along with
memory for some number of elements for that array.  For example:

struct foo {
    int stuff;
    struct boo entry[];
};

size = sizeof(struct foo) + count * sizeof(struct boo);
instance = kvzalloc(size, GFP_KERNEL);

Instead of leaving these open-coded and prone to type mistakes, we can
now use the new struct_size() helper:

instance = kvzalloc(struct_size(instance, entry, count), GFP_KERNEL);

This code was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'nfp-update-to-control-structures'
David S. Miller [Sat, 13 Apr 2019 00:29:15 +0000 (17:29 -0700)]
Merge branch 'nfp-update-to-control-structures'

Jakub Kicinski says:

====================
nfp: update to control structures

This series prepares NFP control structures for crypto offloads.
So far we mostly dealt with configuration requests under rtnl lock.
This will no longer be the case with crypto.  Additionally we will
try to reuse the BPF control message format, so we move common code
out of BPF.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonfp: split out common control message handling code
Jakub Kicinski [Fri, 12 Apr 2019 03:27:07 +0000 (20:27 -0700)]
nfp: split out common control message handling code

BPF's control message handler seems like a good base to built
on for request-reply control messages.  Split it out to allow
for reuse.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonfp: move vNIC reset before netdev init
Jakub Kicinski [Fri, 12 Apr 2019 03:27:06 +0000 (20:27 -0700)]
nfp: move vNIC reset before netdev init

During probe we clear vNIC configuration in case the device
wasn't closed cleanly by previous driver.  Move that code
before netdev init, so netdev init can already try to apply
its config parameters.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonfp: add a mutex lock for the vNIC ctrl BAR
Jakub Kicinski [Fri, 12 Apr 2019 03:27:05 +0000 (20:27 -0700)]
nfp: add a mutex lock for the vNIC ctrl BAR

Soon we will try to write to the vNIC mailbox without RTNL held.
Add a new mutex to protect access to specific parts of the PCI
control BAR.

Move the mailbox size checking to the mailbox lock() helper, where
it can be more effective (happen prior to potential overwrite of
other data).

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonfp: opportunistically poll for reconfig result
Dirk van der Merwe [Fri, 12 Apr 2019 03:27:04 +0000 (20:27 -0700)]
nfp: opportunistically poll for reconfig result

If the reconfig was a quick update, we could have results available from
firmware within 200us.

Signed-off-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoipv6: Remove flowi6_oif compare from __ip6_route_redirect
David Ahern [Fri, 12 Apr 2019 17:31:14 +0000 (10:31 -0700)]
ipv6: Remove flowi6_oif compare from __ip6_route_redirect

In the review of 0b34eb004347 ("ipv6: Refactor __ip6_route_redirect"),
Martin noted that the flowi6_oif compare is moved to the new helper and
should be removed from __ip6_route_redirect. Fix the oversight.

Fixes: 0b34eb004347 ("ipv6: Refactor __ip6_route_redirect")
Reported-by: Martin Lau <kafai@fb.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'netdevsim-Mostly-cleanup-in-sdev-bpf-iface-area'
David S. Miller [Fri, 12 Apr 2019 23:49:54 +0000 (16:49 -0700)]
Merge branch 'netdevsim-Mostly-cleanup-in-sdev-bpf-iface-area'

Jiri Pirko says:

====================
netdevsim: Mostly cleanup in sdev/bpf iface area

This patches does mainly internal netdevsim code shuffle. Nothing
serious, just small changes to help readability and preparations for
future work.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonetdevsim: move sdev-specific init/uninit code into separate functions
Jiri Pirko [Fri, 12 Apr 2019 12:49:29 +0000 (14:49 +0200)]
netdevsim: move sdev-specific init/uninit code into separate functions

In order to improve readability and prepare for future code changes,
move sdev specific init/uninit code into separate functions.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonetdevsim: make bpf_offload_dev_create() per-sdev instead of first ns
Jiri Pirko [Fri, 12 Apr 2019 12:49:28 +0000 (14:49 +0200)]
netdevsim: make bpf_offload_dev_create() per-sdev instead of first ns

offload dev is stored in sdev struct. However, first netdevsim instance
is used as a priv. Change this to be sdev to as it is shared among
multiple netdevsim instances.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonetdevsim: move sdev specific bpf debugfs files to sdev dir
Jiri Pirko [Fri, 12 Apr 2019 12:49:27 +0000 (14:49 +0200)]
netdevsim: move sdev specific bpf debugfs files to sdev dir

Some netdevsim bpf debugfs files are per-sdev, yet they are defined per
netdevsim instance. Move them under sdev directory.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonetdevsim: move shared dev creation and destruction into separate file
Jiri Pirko [Fri, 12 Apr 2019 12:49:26 +0000 (14:49 +0200)]
netdevsim: move shared dev creation and destruction into separate file

To make code easier to read, move shared dev bits into a separate file.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoDocumentation: net: dsa: transition to the rst format
Ioana Ciornei [Fri, 12 Apr 2019 11:55:18 +0000 (14:55 +0300)]
Documentation: net: dsa: transition to the rst format

This patch also performs some minor adjustments such as numbering for
the receive path sequence, conversion of keywords to inline literals and
adding an index page so it looks better in the output of 'make htmldocs'.

Signed-off-by: Ioana Ciornei <ciorneiioana@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: veth: use generic helper to report timestamping info
Julian Wiedmann [Fri, 12 Apr 2019 11:06:15 +0000 (13:06 +0200)]
net: veth: use generic helper to report timestamping info

For reporting the common set of SW timestamping capabilities, use
ethtool_op_get_ts_info() instead of re-implementing it.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: loopback: use generic helper to report timestamping info
Julian Wiedmann [Fri, 12 Apr 2019 11:06:14 +0000 (13:06 +0200)]
net: loopback: use generic helper to report timestamping info

For reporting the common set of SW timestamping capabilities, use
ethtool_op_get_ts_info() instead of re-implementing it.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: dummy: use generic helper to report timestamping info
Julian Wiedmann [Fri, 12 Apr 2019 11:06:13 +0000 (13:06 +0200)]
net: dummy: use generic helper to report timestamping info

For reporting the common set of SW timestamping capabilities, use
ethtool_op_get_ts_info() instead of re-implementing it.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'smc-next'
David S. Miller [Fri, 12 Apr 2019 17:50:56 +0000 (10:50 -0700)]
Merge branch 'smc-next'

Ursula Braun says:

====================
net/smc: patches 2019-04-12

here are patches for SMC:
* patch 1 improves behavior of non-blocking connect
* patches 2, 3, 5, 7, and 8 improve connecting return codes
* patches 4 and 6 are a cleanups without functional change
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet/smc: improve smc_conn_create reason codes
Karsten Graul [Fri, 12 Apr 2019 10:57:30 +0000 (12:57 +0200)]
net/smc: improve smc_conn_create reason codes

Rework smc_conn_create() to always return a valid DECLINE reason code.
This removes the need to translate the return codes on 4 different
places and allows to easily add more detailed return codes by changing
smc_conn_create() only.

Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet/smc: improve smc_listen_work reason codes
Karsten Graul [Fri, 12 Apr 2019 10:57:29 +0000 (12:57 +0200)]
net/smc: improve smc_listen_work reason codes

Rework smc_listen_work() to provide improved reason codes when an
SMC connection is declined. This allows better debugging on user side.
This also adds 3 more detailed reason codes in smc_clc.h to indicate
what type of device was not found (ism or rdma or both), or if ism
cannot talk to the peer.

Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet/smc: code cleanup smc_listen_work
Karsten Graul [Fri, 12 Apr 2019 10:57:28 +0000 (12:57 +0200)]
net/smc: code cleanup smc_listen_work

In smc_listen_work() the variables rc and reason_code are defined which
have the same meaning. Eliminate reason_code in favor of the shorter
name rc. No functional changes.
Rename the functions smc_check_ism() and smc_check_rdma() into
smc_find_ism_device() and smc_find_rdma_device() to make there purpose
more clear. No functional changes.

Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet/smc: cleanup of get vlan id
Karsten Graul [Fri, 12 Apr 2019 10:57:27 +0000 (12:57 +0200)]
net/smc: cleanup of get vlan id

The vlan_id of the underlying CLC socket was retrieved two times
during processing of the listen handshaking. Change this to get the
vlan id one time in connect and in listen processing, and reuse the id.
And add a new CLC DECLINE return code for the case when the retrieval
of the vlan id failed.

Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet/smc: consolidate function parameters
Karsten Graul [Fri, 12 Apr 2019 10:57:26 +0000 (12:57 +0200)]
net/smc: consolidate function parameters

During initialization of an SMC socket a lot of function parameters need
to get passed down the function call path. Consolidate the parameters
in a helper struct so there are less enough parameters to get all passed
by register.

Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet/smc: check for ip prefix and subnet
Karsten Graul [Fri, 12 Apr 2019 10:57:25 +0000 (12:57 +0200)]
net/smc: check for ip prefix and subnet

The check for a matching ip prefix and subnet was only done for SMC-R
in smc_listen_rdma_check() but not when an SMC-D connection was
possible. Rename the function into smc_listen_prfx_check() and move its
call to a place where it is called for both SMC variants.
And add a new CLC DECLINE reason for the case when the IP prefix or
subnet check fails so the reason for the failing SMC connection can be
found out more easily.

Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet/smc: fallback to TCP after connect problems
Karsten Graul [Fri, 12 Apr 2019 10:57:24 +0000 (12:57 +0200)]
net/smc: fallback to TCP after connect problems

Correct the CLC decline reason codes for internal problems to not have
the sign bit set, negative reason codes are interpreted as not eligible
for TCP fallback.

Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet/smc: nonblocking connect rework
Ursula Braun [Fri, 12 Apr 2019 10:57:23 +0000 (12:57 +0200)]
net/smc: nonblocking connect rework

For nonblocking sockets move the kernel_connect() from the connect
worker into the initial smc_connect part to return kernel_connect()
errors other than -EINPROGRESS to user space.

Reviewed-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoxen-netback: add reference from xenvif to backend_info to facilitate coredump analysis
Dongli Zhang [Fri, 12 Apr 2019 06:53:24 +0000 (14:53 +0800)]
xen-netback: add reference from xenvif to backend_info to facilitate coredump analysis

During coredump analysis, it is not easy to obtain the address of
backend_info in xen-netback.

So far there are two ways to obtain backend_info:

1. Do what xenbus_device_find() does for vmcore to find the xenbus_device
and then derive it from dev_get_drvdata().

2. Extract backend_info from callstack of xenwatch (e.g., netback_remove()
or frontend_changed()).

This patch adds a reference from xenvif to backend_info so that it would be
much more easier to obtain backend_info during coredump analysis.

Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge branch 'sctp-skb-list'
David S. Miller [Fri, 12 Apr 2019 04:33:37 +0000 (21:33 -0700)]
Merge branch 'sctp-skb-list'

David Miller says:

====================
SCTP: Event skb list overhaul.

This patch series eliminates the explicit reference to the skb list
implementation via skb->prev dereferences.

The approach used is to pass a non-empty skb list around instead of an
event skb object which may or may not be on a list.

I'd like to thank Marcelo Leitner, Xin Long, and Neil Horman for
reviewing previous versions of this series.

Testing would be very much appreciated, in addition to the review of
course.

v4 --> v5: Rebase to net-next

v3 --> v4: Fix the logic in patch #4 so that we don't miss cases
           where we should add event to the on-stack temp list.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosctp: Pass sk_buff_head explicitly to sctp_ulpq_tail_event().
David Miller [Thu, 11 Apr 2019 22:02:07 +0000 (15:02 -0700)]
sctp: Pass sk_buff_head explicitly to sctp_ulpq_tail_event().

Now the SKB list implementation assumption can be removed.

And now that we know that the list head is always non-NULL
we can remove the code blocks dealing with that as well.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosctp: Make sctp_enqueue_event tak an skb list.
David Miller [Thu, 11 Apr 2019 22:02:04 +0000 (15:02 -0700)]
sctp: Make sctp_enqueue_event tak an skb list.

Pass this, instead of an event.  Then everything trickles down and we
always have events a non-empty list.

Then we needs a list creating stub to place into .enqueue_event for sctp_stream_interleave_1.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosctp: Use helper for sctp_ulpq_tail_event() when hooked up to ->enqueue_event
David Miller [Thu, 11 Apr 2019 22:02:01 +0000 (15:02 -0700)]
sctp: Use helper for sctp_ulpq_tail_event() when hooked up to ->enqueue_event

This way we can make sure events sent this way to
sctp_ulpq_tail_event() are on a list as well.  Now all such code paths
are fully covered.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosctp: Always pass skbs on a list to sctp_ulpq_tail_event().
David Miller [Thu, 11 Apr 2019 22:01:57 +0000 (15:01 -0700)]
sctp: Always pass skbs on a list to sctp_ulpq_tail_event().

This way we can simplify the logic and remove assumptions
about the implementation of skb lists.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agosctp: Remove superfluous test in sctp_ulpq_reasm_drain().
David Miller [Thu, 11 Apr 2019 22:01:53 +0000 (15:01 -0700)]
sctp: Remove superfluous test in sctp_ulpq_reasm_drain().

Inside the loop, we always start with event non-NULL.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agonet: sched: flower: fix filter net reference counting
Vlad Buslov [Thu, 11 Apr 2019 21:54:19 +0000 (00:54 +0300)]
net: sched: flower: fix filter net reference counting

Fix net reference counting in fl_change() and remove redundant call to
tcf_exts_get_net() from __fl_delete(). __fl_put() already tries to get net
before releasing exts and deallocating a filter, so this code caused flower
classifier to obtain net twice per filter that is being deleted.

Implementation of __fl_delete() called tcf_exts_get_net() to pass its
result as 'async' flag to fl_mask_put(). However, 'async' flag is redundant
and only complicates fl_mask_put() implementation. This functionality seems
to be copied from filter cleanup code, where it was added by Cong with
following explanation:

    This patchset tries to fix the race between call_rcu() and
    cleanup_net() again. Without holding the netns refcnt the
    tc_action_net_exit() in netns workqueue could be called before
    filter destroy works in tc filter workqueue. This patchset
    moves the netns refcnt from tc actions to tcf_exts, without
    breaking per-netns tc actions.

This doesn't apply to flower mask, which doesn't call any tc action code
during cleanup. Simplify fl_mask_put() by removing the flag parameter and
always use tcf_queue_work() to free mask objects.

Fixes: 061775583e35 ("net: sched: flower: introduce reference counting for filters")
Fixes: 1f17f7742eeb ("net: sched: flower: insert filter to ht before offloading it to hw")
Fixes: 05cd271fd61a ("cls_flower: Support multiple masks per priority")
Reported-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoselftests: Add debugging options to pmtu.sh
David Ahern [Thu, 11 Apr 2019 18:51:50 +0000 (11:51 -0700)]
selftests: Add debugging options to pmtu.sh

pmtu.sh script runs a number of tests and dumps a summary of pass/fail.
If a test fails, it is near impossible to debug why. For example:

    TEST: ipv6: PMTU exceptions                       [FAIL]

There are a lot of commands run behind the scenes for this test. Which
one is failing?

Add a VERBOSE option to show commands that are run and any output from
those commands. Add a PAUSE_ON_FAIL option to halt the script if a test
fails allowing users to poke around with the setup in the failed state.

In the process, rename tracing to TRACING and move declaration to top
with the new variables.

Signed-off-by: David Ahern <dsahern@gmail.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
David S. Miller [Fri, 12 Apr 2019 00:00:05 +0000 (17:00 -0700)]
Merge git://git./linux/kernel/git/bpf/bpf-next

Daniel Borkmann says:

====================
pull-request: bpf-next 2019-04-12

The following pull-request contains BPF updates for your *net-next* tree.

The main changes are:

1) Improve BPF verifier scalability for large programs through two
   optimizations: i) remove verifier states that are not useful in pruning,
   ii) stop walking parentage chain once first LIVE_READ is seen. Combined
   gives approx 20x speedup. Increase limits for accepting large programs
   under root, and add various stress tests, from Alexei.

2) Implement global data support in BPF. This enables static global variables
   for .data, .rodata and .bss sections to be properly handled which allows
   for more natural program development. This also opens up the possibility
   to optimize program workflow by compiling ELFs only once and later only
   rewriting section data before reload, from Daniel and with test cases and
   libbpf refactoring from Joe.

3) Add config option to generate BTF type info for vmlinux as part of the
   kernel build process. DWARF debug info is converted via pahole to BTF.
   Latter relies on libbpf and makes use of BTF deduplication algorithm which
   results in 100x savings compared to DWARF data. Resulting .BTF section is
   typically about 2MB in size, from Andrii.

4) Add BPF verifier support for stack access with variable offset from
   helpers and add various test cases along with it, from Andrey.

5) Extend bpf_skb_adjust_room() growth BPF helper to mark inner MAC header
   so that L2 encapsulation can be used for tc tunnels, from Alan.

6) Add support for input __sk_buff context in BPF_PROG_TEST_RUN so that
   users can define a subset of allowed __sk_buff fields that get fed into
   the test program, from Stanislav.

7) Add bpf fs multi-dimensional array tests for BTF test suite and fix up
   various UBSAN warnings in bpftool, from Yonghong.

8) Generate a pkg-config file for libbpf, from Luca.

9) Dump program's BTF id in bpftool, from Prashant.

10) libbpf fix to use smaller BPF log buffer size for AF_XDP's XDP
    program, from Magnus.

11) kallsyms related fixes for the case when symbols are not present in
    BPF selftests and samples, from Daniel
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
5 years agobridge: broute: make broute a real ebtables table
Florian Westphal [Thu, 11 Apr 2019 14:36:42 +0000 (16:36 +0200)]
bridge: broute: make broute a real ebtables table

This makes broute a normal ebtables table, hooking at PREROUTING.
The broute hook is removed.

It uses skb->cb to signal to bridge rx handler that the skb should be
routed instead of being bridged.

This change is backwards compatible with ebtables as no userspace visible
parts are changed.

This means we can also remove the !ops test in ebt_register_table,
it was only there for broute table sake.

Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
5 years agobridge: netfilter: unroll NF_HOOK helper in bridge input path
Florian Westphal [Thu, 11 Apr 2019 14:36:41 +0000 (16:36 +0200)]
bridge: netfilter: unroll NF_HOOK helper in bridge input path

Replace NF_HOOK() based invocation of the netfilter hooks with a private
copy of nf_hook_slow().

This copy has one difference: it can return the rx handler value expected
by the stack, i.e. RX_HANDLER_CONSUMED or RX_HANDLER_PASS.

This is needed by the next patch to invoke the ebtables
"broute" table via the standard netfilter hooks rather than the custom
"br_should_route_hook" indirection that is used now.

When the skb is to be "brouted", we must return RX_HANDLER_PASS from the
bridge rx input handler, but there is no way to indicate this via
NF_HOOK(), unless perhaps by some hack such as exposing bridge_cb in the
netfilter core or a percpu flag.

  text    data     bss     dec   filename
  3369      56       0    3425   net/bridge/br_input.o.before
  3458      40       0    3498   net/bridge/br_input.o.after

This allows removal of the "br_should_route_hook" in the next patch.

Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>