tcp_ulp_list is traversed using list_for_each_entry_rcu
outside an RCU read-side critical section but under the protection
of tcp_ulp_list_lock.

Hence, add corresponding lockdep expression to silence false-positive
warnings, and harden RCU lists.t
Signed-off-by: Amol Grover <frextrite@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Jiri Pirko says:

====================
mlxsw: Introduce ACL traps

This patchset allows to track packets that are dropped in HW by ACL.

Unlike the existing mlxsw traps, ACL traps are "source traps".
That means the action is not controlled by HPKT register but directly
in ACL TRAP action. When devlink user changes action from drop to trap
and vice versa, it would be needed to go over all instances of ACL TRAP
action and do change. That does not scale. Instead, resolve this
by introducing "dummy" group with "thin" policer. The purpose of
this policer is to drop as many packets as possible. The ones
that pass through are going to be dropped in devlink code - patch #6
takes care of that.

First four patches are preparation for introduction of ACL traps in mlxsw
so it possible to easily change from drop to trap for source traps
as well - by changing group to "dummy" and back.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a test to check functionality of ACL traps.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently the helpers assume pref 1 and handle 101. Make that explicit
and pass the values from callers.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Include test of forbidding to have drop rule on mixed-bound
shared block.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add the trap group used to report ACL drops. Setup the trap IDs for
ingress/egress flow action drop. Register the two packet traps
associated with ACL trap group with devlink during driver
initialization. As these are "source traps", set the disabled
trap group to be the dummy, discarding as many packets in HW
as possible.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

For "source traps" it is not possible to change HPKT action to discard.
But there is still need to disallow packets arriving to CPU as much as
possible. Handle this by introduction of a "dummy group". It has a
"thin" policer, which passes as less packets to CPU as possible. The
rest is going to be discarded there. The "dummy group" is to be used
later on by ACL trap (which is a "source trap").
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Extend the mlxsw_listener struct to contain trap group for disabled
traps too. Rename the original "trap_group" item to "en_trap_group" as
it represents enabled state. Let both groups be the same for MLXSW_RXL
however extend MLXSW_RXL_DIS to register separate groups for enable and
disable.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

For source traps, the "thin policer" is going to be used in order
to reduce the amount of trapped packets to minimum. However, there
will be still small number of packets coming in that need to be dropped
in the driver. Allow to enable/disable rx_listener related to specific
trap in order to prevent unwanted packets to go up the stack.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Introduce a new set of traps:
DISCARD_INGRESS_ACL and DISCARD_EGRESS_ACL
Set the trap_action from NOP to TRAP which causes the packets dropped
by the TRAP action to be trapped under new trap IDs, depending on the
ingress/egress binding point.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The ACL flex action will have to know if it is in ingress or egress,
so it can use correct trap ID. Pass the ingress indication down to it.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Action drop is going to be tracked by two separate traps, one for
ingress and one for egress. Prepare for it and disallow the possibility
to have drop action in blocks which are bound to both ingress and
egress.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Count the number of ingress and egress block bindings. Use the egress
counter in "is_egress_bound" helper. Add couple of helpers to check
ingress and mixed bound.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add packet traps that can report packets that were dropped during ACL
processing.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Rename function mlxsw_core_trap_action_set() to
mlxsw_core_trap_state_set() and pass bool enabled instead of action.
Figure out the action according to the enabled state there.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The listener fields en_action and dis_action now contain the actions to
be used for TRAP and DROP devlink trap actions. Use them directly
instead of the hard-coded values.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Introduce a new macro MLXSW_RXL_DIS that allows to register listeners
as disabled. That allows that from now on, the "action" can be
understood always as "enabled action" and "unreg_action" as "disabled
action". Rename them and treat them accordingly.

Use the new macro for defining drops in spectrum_trap.c.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently it does not really matter if it is set to DISCARD or
SET_FW_DEFAULT because it is set only during unregister of the listener.
The unreg_action is going to be used for disabling the listener too, so
change to SET_FW_DEFAULT and ensure the HW is going to behave correctly.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Leon Romanovsky says:

====================
Clean driver, module and FW versions

Change log:
 v1:
  * Split all FW cleanups patches to separate patches
  * Fixed commit message
  * Deleted odd DRV_RELDATE
  * Added everyone from MAINTAINERS file
 v0: https://lore.kernel.org/netdev/20200220145855.255704-1-leon@kernel.org

This is first patchset to netdev (already sent RDMA [1] and arch/um [2])
in attempt to unify the version management for in-tree kernel code.
The patches follow already accepted ethtool change [3] to set as
a default linux kernel version.

It allows us to remove driver version and present to the users unified
picture of driver version, which is similar to default MODULE_VERSION().

As part of this series, I deleted various creative attempts to mark
absence of FW. There is no need to set "N/A" in ethtool ->fw_version
field and it is enough to do not set it.

1.
The code is compile tested and passes 0-day kbuild.
2.
The proposed changes are based on commit:
  2bb07f4e ("tc-testing: updated tdc tests for basic filter")
3.
WIP branch is [4].

[1] https://lore.kernel.org/linux-rdma/20200220071239.231800-1-leon@kernel.org/
[2] http://lists.infradead.org/pipermail/linux-um/2020-February/002913.html
[3] https://lore.kernel.org/linux-rdma/20200127072028.19123-1-leon@kernel.org/
[4] https://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git/log/?h=ethtool
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Use linux kernel version for ethtool and module versions.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Acked-by: Chris Snook <chris.snook@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Drop constant driver version in favour of global linux kernel.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There is no need to keep module and driver versions in in-tree
kernel code.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There is no need to set "N/A" if FW is not available.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Delete module version in favor of global and unique linux kernel.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Convert AMD drivers to respect universal linux kernel version.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Upstream drivers are managed inside global repository and released all
together, this ensure that driver version is the same as linux kernel,
so update amazon drivers to properly reflect it.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Convert to use default version provided by ethtool.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The acenic driver assigns FW version in driver version field,
as part of cleanup driver version, set FW version properly.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There is no need in custom driver version for in-tree code.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Use standard variant of the driver version.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There is no need in driver version for in-tree kernel code.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

If FW version is not available, it is enough to leave that field as
empty, there is no need to write N/A.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

If FW version is not available, it is enough to leave that field as
empty, there is no need to write N/A.

The driver version is replaced in favor of generally available
in-tree variant.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Delete useless driver version in favor of default ones.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There is no need to mislead users by providing different versions for
driver, ethtool and modules. Delete driver assignments and let use
the default one.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Delete constant driver and module versions in favor of
standard global version which is unique to whole kernel.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The in-kernel code has already unique version, which is based
on Linus's tag, update the bond driver to be consistent with that
version.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The pointer 'client' is being initialized with a value that is never
read, it is being updated later on. The initialization is redundant
and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There is a spelling mistake in a literal string. Fix it.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

generic_xdp_tx and xdp_do_generic_redirect are only used by builtin
code, so remove the EXPORT_SYMBOL_GPL for them.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>