Only boolean operations supports offloading, so check the type of the
operation and return an error for other types.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Split the code specific to dumping bitwise boolean operations out into a
separate function.  A similar function will be added later for shift
operations.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Split the code specific to evaluating bitwise boolean operations out
into a separate function.  Similar functions will be added later for
shift operations.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Split the code specific to initializing bitwise boolean operations out
into a separate function.  A similar function will be added later for
shift operations.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Add a new bitwise netlink attribute, NFTA_BITWISE_OP, which is set to a
value of a new enum, nft_bitwise_ops.  It describes the type of
operation an expression contains.  Currently, it only has one value:
NFT_BITWISE_BOOL.  More values will be added later to implement shifts.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

When dumping a bitwise expression, if any of the puts fails, we use goto
to jump to a label.  However, no clean-up is required and the only
statement at the label is a return.  Drop the goto's and return
immediately instead.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

In later patches, we will be adding more checks.  In order to be
consistent and prevent complaints from checkpatch.pl, replace the
existing comparisons with NULL with logical NOT operators.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Indentation fixes for the parameters of a few nft functions.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Split nf_flow_table_offload_setup() in two functions to make it more
maintainable.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Consolidate code to configure the flow_cls_offload structure into one
helper function.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

no need, just use a simple boolean to indicate we want to reap all
entries.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

If nf_flow_offload_add() fails to add the flow to hardware, then the
NF_FLOW_HW_REFRESH flag bit is set and the flow remains in the flowtable
software path.

If flowtable hardware offload is enabled, this patch enqueues a new
request to offload this flow to hardware.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

This function checks for the NF_FLOWTABLE_HW_OFFLOAD flag, meaning that
the flowtable hardware offload is enabled.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Originally, all flow flag bits were set on only from the workqueue. With
the introduction of the flow teardown state and hardware offload this is
no longer true. Let's be safe and use atomic bitwise operation to
operation with flow flags.

Fixes: 59c466dd ("netfilter: nf_flow_table: add a new flow state for tearing down offloading")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

The dying bit removes the conntrack entry if the netdev that owns this
flow is going down. Instead, use the teardown mechanism to push back the
flow to conntrack to let the classic software path decide what to do
with it.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Add helper function to allocate and initialize flow offload work and use
it to consolidate existing code.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Set on FLOW_DISSECTOR_KEY_META meta key using flow tuple ingress interface.

Fixes: c29f74e0 ("netfilter: nf_flow_table: hardware offload support")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Do not fetch statistics if flow has expired since it might not in
hardware anymore. After this update, remove the FLOW_OFFLOAD_HW_DYING
check from nf_flow_offload_stats() since this flag is never set on.

Fixes: c29f74e0 ("netfilter: nf_flow_table: hardware offload support")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: wenxu <wenxu@ucloud.cn>

The comment documenting how bitwise expressions work includes a table
which summarizes the mask and xor arguments combined to express the
supported boolean operations.  However, the row for OR:

 mask    xor
 0       x

is incorrect.

  dreg = (sreg & 0) ^ x

is not equivalent to:

  dreg = sreg | x

What the code actually does is:

  dreg = (sreg & ~x) ^ x

Update the documentation to match.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

Remove duplicated include.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Review of the recently added documentation file for the qed driver
noticed a couple of typos. Fix them now.
Noticed-by: Michal Kalderon <mkalderon@marvell.com>
Fixes: 0f261c3c ("devlink: add a driver-specific file for the qed driver")
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

use sk_bound_dev_if for route lookup as already done
in most of the other ip_route_output_ports() calls.

Since most PPPoA providers use 10.0.0.138 as default gateway IP
this will allow connections to multiple PPTP providers with the
same IP address over different interfaces.
Signed-off-by: Ulrich Weber <ulrich.weber@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Simon Wunderlich says:

====================
This feature/cleanup patchset includes the following patches:

 - bump version strings, by Simon Wunderlich

 - fix typo and kerneldocs, by Sven Eckelmann

 - use WiFi txbitrate for B.A.T.M.A.N. V as fallback, by René Treffer

 - silence some endian sparse warnings by adding annotations,
   by Sven Eckelmann

 - Update copyright years to 2020, by Sven Eckelmann

 - Disable deprecated sysfs configuration by default, by Sven Eckelmann
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Nikolay Aleksandrov says:

====================
net: bridge: add vlan notifications and rtm support

This patch-set is a prerequisite for adding per-vlan options support
because we need to be able to send vlan-only notifications and do larger
vlan netlink dumps. Per-vlan options are needed as we move the control
more to vlans and would like to add per-vlan state (needed for per-vlan
STP and EVPN), per-vlan multicast options and control, and I'm sure
there would be many more per-vlan options coming.
Now we create/delete/dump vlans with the device AF_SPEC attribute which is
fine since we support vlan ranges or use a compact bridge_vlan_info
structure, but that cannot really be extended to support per-vlan options
well. The biggest issue is dumping them - we tried using the af_spec with
a new vlan option attribute but that led to insufficient message size
quickly, also another minor problem with that is we have to dump all vlans
always when notifying which, with options present, can be huge if they have
different options set, so we decided to add new rtm message types
specifically for vlans and register handlers for them and a new bridge vlan
notification nl group for vlan-only notifications.
The new RTM NEW/DEL/GETVLAN types introduced match the current af spec
bridge functionality and in fact use the same helpers.
The new nl format is:
 [BRIDGE_VLANDB_ENTRY]
    [BRIDGE_VLANDB_ENTRY_INFO] - bridge_vlan_info (either 1 vlan or
                                                   range start)
    [BRIDGE_VLANDB_ENTRY_RANGE] - range end

This allows to encapsulate a range in a single attribute and also to
create vlans and immediately set options on all of them with a single
attribute. The GETVLAN dump can span multiple messages and dump all the
necessary information. The vlan-only notifications are sent on
NEW/DELVLAN events or when vlan options change (currently only flags),
we try hard to compress the vlans into ranges in the notifications as
well. When the per-vlan options are added we'll add helpers to check for
option equality between neighbor vlans and will keep compressing them
when possible.

Note patch 02 is not really required, it's just a nice addition to have
human-readable error messages from the different vlan checks.

iproute2 changes and selftests will be sent with the next set which adds
the first per-vlan option - per-vlan state similar to the port state.

v2: changed patch 03 and patch 04 to use nlmsg_parse() in order to
    strictly validate the msg and make sure there are no remaining bytes
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Now that we can notify, send a notification on add/del or change of flags.
Notifications are also compressed when possible to reduce their number
and relieve user-space of extra processing, due to that we have to
manually notify after each add/del in order to avoid double
notifications. We try hard to notify only about the vlans which actually
changed, thus a single command can result in multiple notifications
about disjoint ranges if there were vlans which didn't change inside.
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a new rtnetlink group for bridge vlan notifications - RTNLGRP_BRVLAN
and add support for sending vlan notifications (both single and ranges).
No functional changes intended, the notification support will be used by
later patches.
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a new vlandb nl attribute - BRIDGE_VLANDB_ENTRY_RANGE which causes
RTM_NEWVLAN/DELVAN to act on a range. Dumps now automatically compress
similar vlans into ranges. This will be also used when per-vlan options
are introduced and vlans' options match, they will be put into a single
range which is encapsulated in one netlink attribute. We need to run
similar checks as br_process_vlan_info() does because these ranges will
be used for options setting and they'll be able to skip
br_process_vlan_info().
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Adding RTM_DELVLAN support similar to RTM_NEWVLAN is simple, just need to
map DELVLAN to DELLINK and register the handler.
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add initial RTM_NEWVLAN support which can only create vlans, operating
similar to the current br_afspec(). We will use it later to also change
per-vlan options. Old-style (flag-based) vlan ranges are not allowed
when using RTM messages, we will introduce vlan ranges later via a new
nested attribute which would allow us to have all the information about a
range encapsulated into a single nl attribute.
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds vlan rtm definitions:
 - NEWVLAN: to be used for creating vlans, setting options and
   notifications
 - DELVLAN: to be used for deleting vlans
 - GETVLAN: used for dumping vlan information

Dumping vlans which can span multiple messages is added now with basic
information (vid and flags). We use nlmsg_parse() to validate the header
length in order to be able to extend the message with filtering
attributes later.
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add extack messages on vlan processing errors. We need to move the flags
missing check after the "last" check since we may have "last" set but
lack a range end flag in the next entry.
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add helpers to check if a vlan id or range are valid. The range helper
must be called when range start or end are detected.
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Ido Schimmel says:

====================
net: Add route offload indication

This patch set adds offload indication to IPv4 and IPv6 routes. So far
offload indication was only available for the nexthop via
'RTNH_F_OFFLOAD', which is problematic as a nexthop is usually shared
between multiple routes.

Based on feedback from Roopa and David on the RFC [1], the indication is
split to 'offload' and 'trap'. This is done because not all the routes
present in hardware actually offload traffic from the kernel. For
example, host routes merely trap packets to the kernel. The two flags
are dumped to user space via the 'rtm_flags' field in the ancillary
header of the rtnetlink message.

In addition, the patch set uses the new flags in order to test the FIB
offload API by adding a dummy FIB offload implementation to netdevsim.
The new tests are added to a shared library and can be therefore shared
between different drivers.

Patches #1-#3 add offload indication to IPv4 routes.
Patches #4 adds offload indication to IPv6 routes.
Patches #5-#6 add support for the offload indication in mlxsw.
Patch #7 adds dummy FIB offload implementation in netdevsim.
Patches #8-#10 add selftests.

v2 (feedback from David Ahern):
* Patch #2: Name last argument of fib_dump_info()
* Patch #2: Move 'struct fib_rt_info' to include/net/ip_fib.h so that it
  could later be passed to fib_alias_hw_flags_set()
* Patch #3: Make use of 'struct fib_rt_info' in fib_alias_hw_flags_set()
* Patch #6: Convert to new fib_alias_hw_flags_set() interface
* Patch #7: Convert to new fib_alias_hw_flags_set() interface

[1] https://patchwork.ozlabs.org/cover/1170530/
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

The test reuses the common FIB offload tests in order to make sure that
mlxsw correctly implements FIB offload.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Test various aspects of the FIB offload API on top of the netdevsim
implementation. Both good and bad flows are tested.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Implement a set of common helpers and tests for FIB offload that can be
used by multiple drivers to check their FIB offload implementations.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Implement dummy IPv4 and IPv6 FIB "offload" in the driver by storing
currently "programmed" routes in a hash table. Each route in the hash
table is marked with "trap" indication. The indication is cleared when
the route is replaced or when the netdevsim instance is deleted.

This will later allow us to test the route offload API on top of
netdevsim.

v2:
* Convert to new fib_alias_hw_flags_set() interface
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Previous patches added support for two hardware flags for IPv4 and IPv6
routes: 'RTM_F_OFFLOAD' and 'RTM_F_TRAP'. Both indicate the presence of
the route in hardware. The first indicates that traffic is actually
offloaded from the kernel, whereas the second indicates that packets
hitting such routes are trapped to the kernel for processing (e.g., host
routes).

Use these two flags in mlxsw. The flags are modified in two places.
Firstly, whenever a route is updated in the device's table. This
includes the addition, deletion or update of a route. For example, when
a host route is promoted to perform NVE decapsulation, its action in the
device is updated, the 'RTM_F_OFFLOAD' flag set and the 'RTM_F_TRAP'
flag cleared.

Secondly, when a route is replaced and overwritten by another route, its
flags are cleared.

v2:
* Convert to new fib_alias_hw_flags_set() interface
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The driver currently uses the 'RTNH_F_OFFLOAD' flag for both routes and
nexthops, which is cumbersome and unnecessary now that we have separate
flag for the route itself.

Separate the offload indication for nexthops from routes and call it
whenever the offload state within the nexthop group changes.

Note that IPv6 (unlike IPv4) does not share the same nexthop group
between different routes, whereas mlxsw does. Therefore, whenever the
offload indication within an IPv6 nexthop group changes, all the linked
routes need to be updated.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In a similar fashion to previous patch, add "offload" and "trap"
indication to IPv6 routes.

This is done by using two unused bits in 'struct fib6_info' to hold
these indications. Capable drivers are expected to set these when
processing the various in-kernel route notifications.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>