net/mlx5e: Use hint to resolve route when in HW multipath mode

As part of creating the tunnel headers while offloading TC encap rules,
we resolve the route and neighbour in order to get the source /
destination mac.

Since the way we offload multipath route is by having two HW rules,
one per uplink port, doing naive route lookup might get us a "wrong"
routing path which goes through the peer uplink and this will get us
eventually to create a wrong L2 header for the tunnel.

To avoid that, we use a device hint to get the correct route.

Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net/mlx5e: Always query offloaded tc peer rule counter

Under multipath when encap rules are duplicated to HW in the driver,
it's possible for one flow to be currently un-offloaded (e.g. lack of
next-hop route or neigh entry) while the other flow is offloaded. As
such, we move to query the counters of both flows at all times.

Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net/mlx5e: Re-attempt to offload flows on multipath port affinity events

Under multipath it's possible for us to offload the flow only through
the e-switch for which proper route through the uplink exists.
When the port is up and the next-hop route is set again we want to
offload through it as well.

We generate SW event from the FIB event handler when multipath port
affinity changes. The tc offloads code gets this event, goes over the
flows which were marked as of having missing route and attempts to
offload them.

Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net/mlx5: Emit port affinity event for multipath offloads

Under multipath offload scheme, as part of handling fib events, emit
mlx5 port affinity event on the enabled ports which will be handled by
the tc offloads code.

Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net/mlx5e: Allow one failure when offloading tc encap rules under multipath

In a similar manner to uplink/VF LAG, under multipath we add encap peer
rule on the second port as well.

However, unlike the LAG case, we do want to allow failure for adding
one of the rules. This happens due to using a routing hint while doing
the route lookup when one path (next hop device) is down.

Introduce a new flag to indicate that route lookup failed for encap
flow. Note that a flow may still not be offloaded to hw due to missing
neighbour, in that case, the neigh update event will take care of it.

Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net/mlx5e: Don't inherit flow flags on peer flow creation

Currently the peer flow inherits the flags from the original flow
after we've set it. At this time the flags are set according to
the flow state, e.g marked as going to slow path and such.

Even if not getting us to real bugs now, this opens the door to
get us to troubles later. Future proof the code and avoid the
inheritance, use the peer flags as were set on input when we
started adding the original flow.

Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net/mlx5e: Activate HW multipath and handle port affinity based on FIB events

To support multipath offload we are going to track SW multipath route
and related nexthops. To do that we register to FIB notifier and handle
the route and next-hops events and reflect that as port affinity to HW.

When there is a new multipath route entry that all next-hops are the
ports of an HCA we will activate LAG in HW.

Egress wise, we use HW LAG as the means to emulate multipath on current
HW which doesn't support port selection based on xmit hash. In the
presence of multiple VFs which use multiple SQs (send queues) this
yields fairly good distribution.

HA wise, HW LAG buys us the ability for a given RQ (receive queue) to
receive traffic from both ports and for SQs to migrate xmitting over
the active port if their base port fails.

When the route entry is being updated to single path we will update
the HW port affinity to use that port only.

If a next-hop becomes dead we update the HW port affinity to the living
port.

When all next-hops are alive again we reset the affinity to default.

Due to FW/HW limitations, when a route is deleted we are not disabling
the HW LAG since doing so will not allow us to enable it again while
VFs are bounded. Typically this is just a temporary state when a
routing daemon removes dead routes and later adds them back as needed.

This patch only handles events for AF_INET.

Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net/mlx5: Add multipath mode

In order to offload ecmp-on-host scheme where next-hop routes are used,
we will make use of HW LAG. Add accessor function to let upper layers
in the driver to realize if the lag acts in multi-path mode.

Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net/mlx5: Use own workqueue for lag netdev events processing

Instead of using the system workqueue, allocate our own workqueue.
This workqueue will be used to handle more work in the next patch.

This patch doesn't change functionality.

Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net/mlx5: Expose lag operations in header file

The change is a refactoring step towards a multipath use case.

Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net/mlx5: Use unsigned int bit instead of bool as a struct member

This fix checkpatch check
CHECK: Avoid using bool structure members because of possible alignment
issues

Signed-off-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net/mlx5e: Don't make internal use of errno to denote missing neigh

EAGAIN is treated as a specific case when we consider the attachment
successful but wait for neigh event before offloading the flow.
This can result in unwanted behavior when sub calls on the offloading
path will return EAGAIN and we pass this error up.

Instead of attaching to a specific error code return a  boolean value
from the attach encap operation saying if the encap is valid or not.

Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net/mlx5e: Cleanup attach encap function

Remove the tunnel info argument which we can get from the other args.
Also reorder the args to have input args first and output args later.

This patch doesn't change functionality.

Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net/mlx5e: Declare mlx5e_tx_reporter_recover_from_ctx as static

Function mlx5e_tx_reporter_recover_from_ctx is only used within mlx5e tx
reporter, move it to be statically declared in en/reporter_tx.c.

Fixes: de8650a82071 ("net/mlx5e: Add tx reporter support")
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Reported-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

selftests: rtnetlink: use internal netns switch for ip commands

'ip' can switch network namespaces internally and then run a given
command relative to that namespace without the need to fork and exec
another ip instance. Update all references of the form:
    ip netns exec "$testns" ip ...
to
    ip -netns "$testns" ...

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 's390-qeth-next'

Julian Wiedmann says:

====================
s390/qeth: updates 2019-02-28

please apply one more qeth patch series for net-next. This eliminates
some of the quirks in our reset code, and slims down the internal
state machine.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

s390/qeth: drop redundant state checking

Now that qeth always uses dev_close() to shutdown the interface, we can
trust the locking and remove some custom state checks.
qeth_l?_stop_card() is no longer called for a card in UP state, so remove
the checks there too. This basically makes the UP state obsolete, so rip
out the whole thing (except for the sysfs-visible string).

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

s390/qeth: don't special-case HW trap during suspend

It makes no difference whether we
1. manually disarm the HW trap and call the offline code with
   recovery_mode == 1, or
2. call the offline code with recovery_mode == 0, and let it disarm the
   HW trap for us.

So consolidate the two code paths in the suspend callback.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

s390/qeth: remove driver-wide workqueue

The qeth-wide workqueue is now only used by a single caller to schedule
close_dev work. Just put it on a system queue instead.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

s390/qeth: don't defer close_dev work during recovery

The recovery code already runs in a kthread, we don't have to defer the
offlining further.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

s390/qeth: remove a redundant check for card->dev

smatch complains that __qeth_l3_set_offline() first accesses card->dev,
and then later checks whether the pointer is valid.
Since commit d3d1b205e89f ("s390/qeth: allocate netdevice early"), the
pointer is _always_ valid - that patch merely missed to remove this one
check.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

s390/qeth: call dev_close() during recovery

When resetting an interface ("recovery"), qeth currently attempts to
elide the call to dev_close(). We initially only call .ndo_close to
quiesce the data path, and then offline & online the ccwgroup device.
If the reset succeeded, a call to .ndo_open then resumes the data path
along with some internal setup (dev_addr validation, RX modeset) that
dev_open() would have usually triggered.
dev_close() only gets called (via the close_dev worker) if the reset
action fails.

It's unclear whether this was initially done due to locking concerns, or
rather to execute the reset transparently. Either way, temporarily
closing the interface without dev_close() is fragile, and means we're
susceptible to various races and unexpected behaviour. For instance:

- Bypassing dev_deactivate_many() means that the qdiscs are not set to
__QDISC_STATE_DEACTIVATED. Consequently any intermittent TX completion
can wake up the txq, resulting in calls to .ndo_start_xmit while the
data path is down. We have custom state checking to detect this case
and drop such packets.

- Because the IFF_UP flag doesn't reflect the interface's actual state
during a reset, we have custom state checking in .ndo_open and
.ndo_close to guard against invalid calls.

- Considering that the reset might take a considerable amount of time
(in particular if an IO fails and we end up waiting for its timeout), we
_do_ want NETDEV_GOING_DOWN and NETDEV_DOWN events so that components
like bonding, team, bridge, macvlan, vlan, ... can take appropriate
action.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

s390/qeth: unconditionally clear MAC_REGISTERED flag

In its attempt to run only the minimal amount of tear down steps,
qeth_l2_stop_card() fails to reset the "is dev_addr registered?" flag
in some rare scenarios. But a future change to the tear down sequence
would cause us to _always_ hit this issue, so patch it up before that
code lands.

Fix it by unconditionally clearing the flag bit. This also allows us to
remove the additional cleanup step in qeth_dev_layer2_store().

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

s390/qeth: enable/disable the HW trap a little earlier

When setting a L2 qeth device online, enable the HW trap as soon as the
control plane is available. This allows us to catch any error that
occurs during the very first commands.

In the same spirit, the offline code should disable the HW trap as the
very first step of its processing.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

s390/qeth: remove RECOVER state

The offline code uses a specific RECOVER state to indicate that the
interface should be brought up when a qeth device is set online again.

Rather than having a specific card-state for this, just put it in an
internal flag bit and set the state to DOWN. When working with the
card's state transitions, this reduces the complexity quite a bit.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/smc: allow pnetid-less configuration

Without hardware pnetid support there must currently be a pnet
table configured to determine the IB device port to be used for SMC
RDMA traffic. This patch enables a setup without pnet table, if
the used handshake interface belongs already to a RoCE port.

Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: sched: pie: avoid slow division in drop probability decay

As per RFC 8033, it is sufficient for the drop probability
decay factor to have a value of (1 - 1/64) instead of 98%.
This avoids the need to do slow division.

Suggested-by: David Laight <David.Laight@aculab.com>
Signed-off-by: Leslie Monis <lesliemonis@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

cxgb4vf: Enter debugging mode if FW is inaccessible

If we are not able to reach firmware, enter debugging mode that will
help us to get adapter logs.

Signed-off-by: Arjun Vynipadath <arjun@chelsio.com>
Signed-off-by: Vishal Kulkarni <vishal@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

cxgb4: Enable outer UDP checksum offload for T6

T6 adapters support outer UDP checksum offload for
encapsulated packets, hence enabling netdev feature flag
NETIF_F_GSO_UDP_TUNNEL_CSUM.

Signed-off-by: Arjun Vynipadath <arjun@chelsio.com>
Signed-off-by: Vishal Kulkarni <vishal@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

cxgb4/cxgb4vf: Fix up netdev->hw_features

GRO is done by cxgb4/cxgb4vf. Hence set NETIF_F_GRO flag for
both cxgb4/cxgb4vf.
Cleaned up VLAN netdev features in cxgb4vf. Also fixed
NETIF_F_HIGHDMA being set unconditionally for vlan netdev
features.

Signed-off-by: Arjun Vynipadath <arjun@chelsio.com>
Signed-off-by: Vishal Kulkarni <vishal@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: sched: act_csum: Fix csum calc for tagged packets

The csum calculation is different for IPv4/6. For VLAN packets,
tc_skb_protocol returns the VLAN protocol rather than the packet's one
(e.g. IPv4/6), so csum is not calculated. Furthermore, VLAN may not be
stripped so csum is not calculated in this case too. Calculate the
csum for those cases.

Fixes: d8b9605d2697 ("net: sched: fix skb->protocol use in case of accelerated vlan path")
Signed-off-by: Eli Britstein <elibr@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: hns: use struct_size() in devm_kzalloc()

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[];
};

instance = devm_kzalloc(dev, sizeof(struct foo) + sizeof(struct boo) * count, GFP_KERNEL);

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

instance = devm_kzalloc(dev, 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>

Merge branch 'net-phy-marvell10g-Clean-get_features-by-using-C45-helpers'

Maxime Chevallier says:

====================
net: phy: marvell10g: Clean .get_features by using C45 helpers

Recent work on C45 helpers by Heiner made the
genphy_c45_pma_read_abilities function generic enough to use as a
default .get_featutes implementation.

This series removes the remaining redundant code in
mv3310_get_features(), and makes the 2110 PHY use
genphy_c45_pma_read_abilities() directly, since it doesn't have the
issue with the wrong abilities being reported.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

net: phy: marvell10g: Use the generic C45 helper to read the 2110 features

Contrary to the 3310, the 2110 PHY correctly reports it's 2.5G/5G
abilities. We can therefore use the genphy_c45_pma_read_abilities helper
to build the list of features.

Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: phy: marvell10g: Let genphy_c45_pma_read_abilities set Aneg bit

The genphy_c45_pma_read_abilities helper now sets the Autoneg ability
in phydev->supported according to what the AN MMD reports.

We therefore don't need to manually do that in mv3310_get_features().

Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Suggested-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: sched: act_tunnel_key: fix metadata handling

Tunnel key action params->tcft_enc_metadata is only set when action is
TCA_TUNNEL_KEY_ACT_SET. However, metadata pointer is incorrectly
dereferenced during tunnel key init and release without verifying that
action is if correct type, which causes NULL pointer dereference. Metadata
tunnel dst_cache is also leaked on action overwrite.

Fix metadata handling:
- Verify that metadata pointer is not NULL before dereferencing it in
  tunnel_key_init error handling code.
- Move dst_cache destroy code into tunnel_key_release_params() function
  that is called in both action overwrite and release cases (fixes resource
  leak) and verifies that actions has correct type before dereferencing
  metadata pointer (fixes NULL pointer dereference).

Oops with KASAN enabled during tdc tests execution:

[  261.080482] ==================================================================
[  261.088049] BUG: KASAN: null-ptr-deref in dst_cache_destroy+0x21/0xa0
[  261.094613] Read of size 8 at addr 00000000000000b0 by task tc/2976
[  261.102524] CPU: 14 PID: 2976 Comm: tc Not tainted 5.0.0-rc7+ #157
[  261.108844] Hardware name: Supermicro SYS-2028TP-DECR/X10DRT-P, BIOS 2.0b 03/30/2017
[  261.116726] Call Trace:
[  261.119234]  dump_stack+0x9a/0xeb
[  261.122625]  ? dst_cache_destroy+0x21/0xa0
[  261.126818]  ? dst_cache_destroy+0x21/0xa0
[  261.131004]  kasan_report+0x176/0x192
[  261.134752]  ? idr_get_next+0xd0/0x120
[  261.138578]  ? dst_cache_destroy+0x21/0xa0
[  261.142768]  dst_cache_destroy+0x21/0xa0
[  261.146799]  tunnel_key_release+0x3a/0x50 [act_tunnel_key]
[  261.152392]  tcf_action_cleanup+0x2c/0xc0
[  261.156490]  tcf_generic_walker+0x4c2/0x5c0
[  261.160794]  ? tcf_action_dump_1+0x390/0x390
[  261.165163]  ? tunnel_key_walker+0x5/0x1a0 [act_tunnel_key]
[  261.170865]  ? tunnel_key_walker+0xe9/0x1a0 [act_tunnel_key]
[  261.176641]  tca_action_gd+0x600/0xa40
[  261.180482]  ? tca_get_fill.constprop.17+0x200/0x200
[  261.185548]  ? __lock_acquire+0x588/0x1d20
[  261.189741]  ? __lock_acquire+0x588/0x1d20
[  261.193922]  ? mark_held_locks+0x90/0x90
[  261.197944]  ? mark_held_locks+0x90/0x90
[  261.202018]  ? __nla_parse+0xfe/0x190
[  261.205774]  tc_ctl_action+0x218/0x230
[  261.209614]  ? tcf_action_add+0x230/0x230
[  261.213726]  rtnetlink_rcv_msg+0x3a5/0x600
[  261.217910]  ? lock_downgrade+0x2d0/0x2d0
[  261.222006]  ? validate_linkmsg+0x400/0x400
[  261.226278]  ? find_held_lock+0x6d/0xd0
[  261.230200]  ? match_held_lock+0x1b/0x210
[  261.234296]  ? validate_linkmsg+0x400/0x400
[  261.238567]  netlink_rcv_skb+0xc7/0x1f0
[  261.242489]  ? netlink_ack+0x470/0x470
[  261.246319]  ? netlink_deliver_tap+0x1f3/0x5a0
[  261.250874]  netlink_unicast+0x2ae/0x350
[  261.254884]  ? netlink_attachskb+0x340/0x340
[  261.261647]  ? _copy_from_iter_full+0xdd/0x380
[  261.268576]  ? __virt_addr_valid+0xb6/0xf0
[  261.275227]  ? __check_object_size+0x159/0x240
[  261.282184]  netlink_sendmsg+0x4d3/0x630
[  261.288572]  ? netlink_unicast+0x350/0x350
[  261.295132]  ? netlink_unicast+0x350/0x350
[  261.301608]  sock_sendmsg+0x6d/0x80
[  261.307467]  ___sys_sendmsg+0x48e/0x540
[  261.313633]  ? copy_msghdr_from_user+0x210/0x210
[  261.320545]  ? save_stack+0x89/0xb0
[  261.326289]  ? __lock_acquire+0x588/0x1d20
[  261.332605]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  261.340063]  ? mark_held_locks+0x90/0x90
[  261.346162]  ? do_filp_open+0x138/0x1d0
[  261.352108]  ? may_open_dev+0x50/0x50
[  261.357897]  ? match_held_lock+0x1b/0x210
[  261.364016]  ? __fget_light+0xa6/0xe0
[  261.369840]  ? __sys_sendmsg+0xd2/0x150
[  261.375814]  __sys_sendmsg+0xd2/0x150
[  261.381610]  ? __ia32_sys_shutdown+0x30/0x30
[  261.388026]  ? lock_downgrade+0x2d0/0x2d0
[  261.394182]  ? mark_held_locks+0x1c/0x90
[  261.400230]  ? do_syscall_64+0x1e/0x280
[  261.406172]  do_syscall_64+0x78/0x280
[  261.411932]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  261.419103] RIP: 0033:0x7f28e91a8b87
[  261.424791] Code: 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 80 00 00 00 00 8b 05 6a 2b 2c 00 48 63 d2 48 63 ff 85 c0 75 18 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 59 f3 c3 0f 1f 80 00 00 00 00 53 48 89 f3 48
[  261.448226] RSP: 002b:00007ffdc5c4e2d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  261.458183] RAX: ffffffffffffffda RBX: 000000005c73c202 RCX: 00007f28e91a8b87
[  261.467728] RDX: 0000000000000000 RSI: 00007ffdc5c4e340 RDI: 0000000000000003
[  261.477342] RBP: 0000000000000000 R08: 0000000000000001 R09: 000000000000000c
[  261.486970] R10: 000000000000000c R11: 0000000000000246 R12: 0000000000000001
[  261.496599] R13: 000000000067b4e0 R14: 00007ffdc5c5248c R15: 00007ffdc5c52480
[  261.506281] ==================================================================
[  261.516076] Disabling lock debugging due to kernel taint
[  261.523979] BUG: unable to handle kernel NULL pointer dereference at 00000000000000b0
[  261.534413] #PF error: [normal kernel read fault]
[  261.541730] PGD 8000000317400067 P4D 8000000317400067 PUD 316878067 PMD 0
[  261.551294] Oops: 0000 [#1] SMP KASAN PTI
[  261.557985] CPU: 14 PID: 2976 Comm: tc Tainted: G    B             5.0.0-rc7+ #157
[  261.568306] Hardware name: Supermicro SYS-2028TP-DECR/X10DRT-P, BIOS 2.0b 03/30/2017
[  261.578874] RIP: 0010:dst_cache_destroy+0x21/0xa0
[  261.586413] Code: f4 ff ff ff eb f6 0f 1f 00 0f 1f 44 00 00 41 56 41 55 49 c7 c6 60 fe 35 af 41 54 55 49 89 fc 53 bd ff ff ff ff e8 ef 98 73 ff <49> 83 3c 24 00 75 35 eb 6c 4c 63 ed e8 de 98 73 ff 4a 8d 3c ed 40
[  261.611247] RSP: 0018:ffff888316447160 EFLAGS: 00010282
[  261.619564] RAX: 0000000000000000 RBX: ffff88835b3e2f00 RCX: ffffffffad1c5071
[  261.629862] RDX: 0000000000000003 RSI: dffffc0000000000 RDI: 0000000000000297
[  261.640149] RBP: 00000000ffffffff R08: fffffbfff5dd4e89 R09: fffffbfff5dd4e89
[  261.650467] R10: 0000000000000001 R11: fffffbfff5dd4e88 R12: 00000000000000b0
[  261.660785] R13: ffff8883267a10c0 R14: ffffffffaf35fe60 R15: 0000000000000001
[  261.671110] FS:  00007f28ea3e6400(0000) GS:ffff888364200000(0000) knlGS:0000000000000000
[  261.682447] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  261.691491] CR2: 00000000000000b0 CR3: 00000003178ae004 CR4: 00000000001606e0
[  261.701283] Call Trace:
[  261.706374]  tunnel_key_release+0x3a/0x50 [act_tunnel_key]
[  261.714522]  tcf_action_cleanup+0x2c/0xc0
[  261.721208]  tcf_generic_walker+0x4c2/0x5c0
[  261.728074]  ? tcf_action_dump_1+0x390/0x390
[  261.734996]  ? tunnel_key_walker+0x5/0x1a0 [act_tunnel_key]
[  261.743247]  ? tunnel_key_walker+0xe9/0x1a0 [act_tunnel_key]
[  261.751557]  tca_action_gd+0x600/0xa40
[  261.757991]  ? tca_get_fill.constprop.17+0x200/0x200
[  261.765644]  ? __lock_acquire+0x588/0x1d20
[  261.772461]  ? __lock_acquire+0x588/0x1d20
[  261.779266]  ? mark_held_locks+0x90/0x90
[  261.785880]  ? mark_held_locks+0x90/0x90
[  261.792470]  ? __nla_parse+0xfe/0x190
[  261.798738]  tc_ctl_action+0x218/0x230
[  261.805145]  ? tcf_action_add+0x230/0x230
[  261.811760]  rtnetlink_rcv_msg+0x3a5/0x600
[  261.818564]  ? lock_downgrade+0x2d0/0x2d0
[  261.825433]  ? validate_linkmsg+0x400/0x400
[  261.832256]  ? find_held_lock+0x6d/0xd0
[  261.838624]  ? match_held_lock+0x1b/0x210
[  261.845142]  ? validate_linkmsg+0x400/0x400
[  261.851729]  netlink_rcv_skb+0xc7/0x1f0
[  261.857976]  ? netlink_ack+0x470/0x470
[  261.864132]  ? netlink_deliver_tap+0x1f3/0x5a0
[  261.870969]  netlink_unicast+0x2ae/0x350
[  261.877294]  ? netlink_attachskb+0x340/0x340
[  261.883962]  ? _copy_from_iter_full+0xdd/0x380
[  261.890750]  ? __virt_addr_valid+0xb6/0xf0
[  261.897188]  ? __check_object_size+0x159/0x240
[  261.903928]  netlink_sendmsg+0x4d3/0x630
[  261.910112]  ? netlink_unicast+0x350/0x350
[  261.916410]  ? netlink_unicast+0x350/0x350
[  261.922656]  sock_sendmsg+0x6d/0x80
[  261.928257]  ___sys_sendmsg+0x48e/0x540
[  261.934183]  ? copy_msghdr_from_user+0x210/0x210
[  261.940865]  ? save_stack+0x89/0xb0
[  261.946355]  ? __lock_acquire+0x588/0x1d20
[  261.952358]  ? entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  261.959468]  ? mark_held_locks+0x90/0x90
[  261.965248]  ? do_filp_open+0x138/0x1d0
[  261.970910]  ? may_open_dev+0x50/0x50
[  261.976386]  ? match_held_lock+0x1b/0x210
[  261.982210]  ? __fget_light+0xa6/0xe0
[  261.987648]  ? __sys_sendmsg+0xd2/0x150
[  261.993263]  __sys_sendmsg+0xd2/0x150
[  261.998613]  ? __ia32_sys_shutdown+0x30/0x30
[  262.004555]  ? lock_downgrade+0x2d0/0x2d0
[  262.010236]  ? mark_held_locks+0x1c/0x90
[  262.015758]  ? do_syscall_64+0x1e/0x280
[  262.021234]  do_syscall_64+0x78/0x280
[  262.026500]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  262.033207] RIP: 0033:0x7f28e91a8b87
[  262.038421] Code: 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 80 00 00 00 00 8b 05 6a 2b 2c 00 48 63 d2 48 63 ff 85 c0 75 18 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 59 f3 c3 0f 1f 80 00 00 00 00 53 48 89 f3 48
[  262.060708] RSP: 002b:00007ffdc5c4e2d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  262.070112] RAX: ffffffffffffffda RBX: 000000005c73c202 RCX: 00007f28e91a8b87
[  262.079087] RDX: 0000000000000000 RSI: 00007ffdc5c4e340 RDI: 0000000000000003
[  262.088122] RBP: 0000000000000000 R08: 0000000000000001 R09: 000000000000000c
[  262.097157] R10: 000000000000000c R11: 0000000000000246 R12: 0000000000000001
[  262.106207] R13: 000000000067b4e0 R14: 00007ffdc5c5248c R15: 00007ffdc5c52480
[  262.115271] Modules linked in: act_tunnel_key act_skbmod act_simple act_connmark nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 act_csum libcrc32c act_meta_skbtcindex act_meta_skbprio act_meta_mark act_ife ife act_police act_sample psample act_gact veth nfsv3 nfs_acl nfs lockd grace fscache bridge stp llc intel_rapl sb_edac mlx5_ib x86_pkg_temp_thermal sunrpc intel_powerclamp coretemp ib_uverbs kvm_intel ib_core kvm irqbypass mlx5_core crct10dif_pclmul crc32_pclmul crc32c_intel igb ghash_clmulni_intel intel_cstate mlxfw iTCO_wdt devlink intel_uncore iTCO_vendor_support ipmi_ssif ptp mei_me intel_rapl_perf ioatdma joydev pps_core ses mei i2c_i801 pcspkr enclosure lpc_ich dca wmi ipmi_si ipmi_devintf ipmi_msghandler acpi_pad acpi_power_meter pcc_cpufreq ast i2c_algo_bit drm_kms_helper ttm drm mpt3sas raid_class scsi_transport_sas
[  262.204393] CR2: 00000000000000b0
[  262.210390] ---[ end trace 2e41d786f2c7901a ]---
[  262.226790] RIP: 0010:dst_cache_destroy+0x21/0xa0
[  262.234083] Code: f4 ff ff ff eb f6 0f 1f 00 0f 1f 44 00 00 41 56 41 55 49 c7 c6 60 fe 35 af 41 54 55 49 89 fc 53 bd ff ff ff ff e8 ef 98 73 ff <49> 83 3c 24 00 75 35 eb 6c 4c 63 ed e8 de 98 73 ff 4a 8d 3c ed 40
[  262.258311] RSP: 0018:ffff888316447160 EFLAGS: 00010282
[  262.266304] RAX: 0000000000000000 RBX: ffff88835b3e2f00 RCX: ffffffffad1c5071
[  262.276251] RDX: 0000000000000003 RSI: dffffc0000000000 RDI: 0000000000000297
[  262.286208] RBP: 00000000ffffffff R08: fffffbfff5dd4e89 R09: fffffbfff5dd4e89
[  262.296183] R10: 0000000000000001 R11: fffffbfff5dd4e88 R12: 00000000000000b0
[  262.306157] R13: ffff8883267a10c0 R14: ffffffffaf35fe60 R15: 0000000000000001
[  262.316139] FS:  00007f28ea3e6400(0000) GS:ffff888364200000(0000) knlGS:0000000000000000
[  262.327146] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  262.335815] CR2: 00000000000000b0 CR3: 00000003178ae004 CR4: 00000000001606e0

Fixes: 41411e2fd6b8 ("net/sched: act_tunnel_key: Add dst_cache support")
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers: net: phy: mdio-mux: Add support for Generic Mux controls

Add support for Generic Mux controls, when Mdio mux node is a consumer
of mux produced by some other device.

Signed-off-by: Pankaj Bansal <pankaj.bansal@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

dt-bindings: net: Add bindings for mdio mux consumers

When we use the bindings defined in Documentation/devicetree/bindings/mux
to define mdio mux in producer and consumer terms, it results in two
devices. one is mux producer and other is mux consumer.

Add the bindings needed for Mdio mux consumer devices.

Signed-off-by: Pankaj Bansal <pankaj.bansal@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

route: Add multipath_hash in flowi_common to make user-define hash

Current fib_multipath_hash_policy can make hash based on the L3 or
L4. But it only work on the outer IP. So a specific tunnel always
has the same hash value. But a specific tunnel may contain so many
inner connections.

This patch provide a generic multipath_hash in floi_common. It can
make a user-define hash which can mix with L3 or L4 hash.

Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'net-Remove-switchdev_ops'

Florian Fainelli says:

====================
net: Remove switchdev_ops

This patch series completes the removal of the switchdev_ops by
converting switchdev_port_attr_set() to use either the blocking
(process) or non-blocking (atomic) notifier since we typically need to
deal with both depending on where in the bridge code we get called from.

This was tested with the forwarding selftests and DSA hardware.

Ido, hopefully this captures your comments done on v1, if not, can you
illustrate with some pseudo-code what you had in mind if that's okay?

Changes in v3:

- added Reviewed-by tags from Ido where relevant
- added missing notifier_to_errno() in net/bridge/br_switchdev.c when
  calling the atomic notifier for PRE_BRIDGE_FLAGS
- kept mlxsw_sp_switchdev_init() in mlxsw/

Changes in v2:

- do not check for SWITCHDEV_F_DEFER when calling the blocking notifier
  and instead directly call the atomic notifier from the single location
  where this is required
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

net: Remove switchdev_ops

Now that we have converted all possible callers to using a switchdev
notifier for attributes we do not have a need for implementing
switchdev_ops anymore, and this can be removed from all drivers the
net_device structure.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: switchdev: Replace port attr set SDO with a notification

Drop switchdev_ops.switchdev_port_attr_set. Drop the uses of this field
from all clients, which were migrated to use switchdev notification in
the previous patches.

Add a new function switchdev_port_attr_notify() that sends the switchdev
notifications SWITCHDEV_PORT_ATTR_SET and calls the blocking (process)
notifier chain.

We have one odd case within net/bridge/br_switchdev.c with the
SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS attribute identifier that
requires executing from atomic context, we deal with that one
specifically.

Drop __switchdev_port_attr_set() and update switchdev_port_attr_set()
likewise.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

staging: fsl-dpaa2: ethsw: Handle SWITCHDEV_PORT_ATTR_SET

Following patches will change the way we communicate setting a port's
attribute and use a blocking notifier to perform those tasks.

Prepare ethsw to support receiving notifier events targeting
SWITCHDEV_PORT_ATTR_SET and simply translate that into the existing
swdev_port_attr_set() call.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: mscc: ocelot: Handle SWITCHDEV_PORT_ATTR_SET

Following patches will change the way we communicate setting a port's
attribute and use notifiers to perform those tasks.

Ocelot does not currently have an atomic notifier registered for
switchdev events, so we need to register one in order to deal with
atomic context SWITCHDEV_PORT_ATTR_SET events.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

mlxsw: spectrum_switchdev: Handle SWITCHDEV_PORT_ATTR_SET

Following patches will change the way we communicate setting a port's
attribute and use a notifier to perform those tasks.

Prepare mlxsw to support receiving notifier events targeting
SWITCHDEV_PORT_ATTR_SET and utilize the switchdev_handle_port_attr_set()
to handle stacking of devices.

Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: Handle SWITCHDEV_PORT_ATTR_SET

Following patches will change the way we communicate setting a port's
attribute and use notifiers towards that goal.

Prepare DSA to support receiving notifier events targeting
SWITCHDEV_PORT_ATTR_SET from both atomic and process context and use a
small helper to translate the event notifier into something that
dsa_slave_port_attr_set() can process.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

rocker: Handle SWITCHDEV_PORT_ATTR_SET

Following patches will change the way we communicate setting a port's
attribute and use notifiers towards that goal.

Prepare rocker to support receiving notifier events targeting
SWITCHDEV_PORT_ATTR_SET from both atomic and process context and use a
small helper to translate the event notifier into something that
rocker_port_attr_set() can process.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

switchdev: Add SWITCHDEV_PORT_ATTR_SET

In preparation for allowing switchdev enabled drivers to veto specific
attribute settings from within the context of the caller, introduce a
new switchdev notifier type for port attributes.

Suggested-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Revert "net: sched: fw: don't set arg->stop in fw_walk() when empty"

This reverts commit 31a998487641 ("net: sched: fw: don't set arg->stop in
fw_walk() when empty")

Cls API function tcf_proto_is_empty() was changed in commit
6676d5e416ee ("net: sched: set dedicated tcf_walker flag when tp is empty")
to no longer depend on arg->stop to determine that classifier instance is
empty. Instead, it adds dedicated arg->nonempty field, which makes the fix
in fw classifier no longer necessary.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ethtool: Use explicit designated initializers for .cmd

Initialize the .cmd member by using a designated struct
initializer. This fixes warning of missing field initializers,
and makes code a little easier to read.

Signed-off-by: Li RongQing <lirongqing@baidu.com>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: sched: pie: fix 64-bit division

Use div_u64() to resolve build failures on 32-bit platforms.

Fixes: 3f7ae5f3dc52 ("net: sched: pie: add more cases to auto-tune alpha and beta")
Signed-off-by: Leslie Monis <lesliemonis@gmail.com>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: Use RCU_POINTER_INITIALIZER() to init static variable

This pointer is RCU protected, so proper primitives should be used.

Signed-off-by: Zhang Yu <zhangyu31@baidu.com>
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'tcp-cleanups'

Eric Dumazet says:

====================
tcp: cleanups for linux-5.1

This small patch series cleanups few things, and add a small
timewait optimization for hosts not using md5.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

tcp: remove tcp_queue argument from tso_fragment()

tso_fragment() is only called for packets still in write queue.

Remove the tcp_queue parameter to make this more obvious,
even if the comment clearly states this.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tcp: use tcp_md5_needed for timewait sockets

This might speedup tcp_twsk_destructor() a bit,
avoiding a cache line miss.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tcp: convert tcp_md5_needed to static_branch API

We prefer static_branch_unlikely() over static_key_false() these days.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tcp: get rid of __tcp_add_write_queue_tail()

This helper is only used from tcp_add_write_queue_tail(), and does
not make the code more readable.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tcp: get rid of tcp_check_send_head()

This helper is used only once, and its name is no longer relevant.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tc-testing: gitignore, ignore local tdc config file

Comment in tdc_config.py recommends putting customizations in
tdc_config_local.py file that wasn't included in gitignore. Add the local
config file to gitignore.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: sched: fix typo in walker_check_empty()

Function walker_check_empty() incorrectly verifies that tp pointer is not
NULL, instead of actual filter pointer. Fix conditional to check the right
pointer. Adjust filter pointer naming accordingly to other cls API
functions.

Fixes: 6676d5e416ee ("net: sched: set dedicated tcf_walker flag when tp is empty")
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reported-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: sched: pie: fix mistake in reference link

Fix the incorrect reference link to RFC 8033

Signed-off-by: Leslie Monis <lesliemonis@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

mlxsw: spectrum: remove set but not used variable 'autoneg_status'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/ethernet/mellanox/mlxsw/spectrum.c: In function 'mlxsw_sp_port_get_link_ksettings':
drivers/net/ethernet/mellanox/mlxsw/spectrum.c:3062:5: warning:
 variable 'autoneg_status' set but not used [-Wunused-but-set-variable]

It's not used since commit 475b33cb66c9 ("mlxsw: spectrum: Remove unsupported
eth_proto_lp_advertise field in PTYS")

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'vxlan-create-and-changelink-extack-support'

Roopa Prabhu says:

====================
vxlan: create and changelink extack support

This series adds extack support to changelink paths.
In the process re-factors flag sets to a separate helper.
Also adds some changelink testcases to rtnetlink.sh

(This series was initially part of another series that
tried to support changelink for more attributes.
But after some feedback from sabrina, i have dropped the
'support changelink for more attributes' part because some
of them cannot be supported today or may require additional
use-case handling code. These can be done separately
as and when we see the need for it.)
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

tools: selftests: rtnetlink: add testcases for vxlan flag sets

This patch extends rtnetlink.sh to cover some vxlan flag
netlink attribute sets.

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

vxlan: add extack support for create and changelink

This patch adds extack coverage in vxlan link
create and changelink paths. Introduces a new helper
vxlan_nl2flags to consolidate flag attribute validation.

thanks to Johannes Berg for some tips to construct the
generic vxlan flag extack strings.

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'devlink-make-ethtool-compat-reliable'

Jakub Kicinski says:

====================
devlink: make ethtool compat reliable

This is a follow up to the series which added device flash
updates via devlink. I went with the approach of adding a
new NDO in the end. It seems to end up looking cleaner.

First patch removes the option to build devlink as a module.
Users can still decide to not build it, but the module option
ends up not being worth the maintenance cost.

Next two patches add a NDO which can be used to ask the driver
to return a devlink instance associated with a given netdev,
instead of iterating over devlink ports. Drivers which implement
this NDO must take into account the potential impact on the
visibility of the devlink instance.

With the new NDO in place we can remove NFP ethtool flash update
code.

Fifth patch makes sure we hold a reference to dev while
callbacks are active.

Last but not least the NULL-check of devlink->ops is moved
to instance allocation time.

Last but not least missing checks for devlink->ops are added.
There is currently no driver registering devlink without ops,
so can just fix this in -next.

v2 (Michal): add netdev_to_devlink() in patch 3.
v3 (Florian):
 - add missing checks for devlink->ops;
 - move locking/holding into devlink_compat_ functions.
v4 (Jiri):
 - hold devlink_mutex around callbacks (patch 2);
 - require non-NULL ops (patch 6).
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

devlink: require non-NULL ops for devlink instances

Commit 76726ccb7f46 ("devlink: add flash update command") and
commit 2d8dc5bbf4e7 ("devlink: Add support for reload")
access devlink ops without NULL-checking. There is, however, no
driver which would pass in NULL ops, so let's just make that
a requirement. Remove the now unnecessary NULL-checking.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

devlink: hold a reference to the netdevice around ethtool compat

When ethtool is calling into devlink compat code make sure we have
a reference on the netdevice on which the operation was invoked.

v3: move the hold/lock logic into devlink_compat_* functions (Florian)

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

nfp: remove ethtool flashing fallback

Now that devlink fallback will be called reliably, we can remove
the ethtool flashing code.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

nfp: add .ndo_get_devlink

Support getting devlink instance from a new NDO.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

devlink: create a special NDO for getting the devlink instance

Instead of iterating over all devlink ports add a NDO which
will return the devlink instance from the driver.

v2: add the netdev_to_devlink() helper (Michal)
v3: check that devlink has ops (Florian)
v4: hold devlink_mutex (Jiri)

Suggested-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: devlink: turn devlink into a built-in

Being able to build devlink as a module causes growing pains.
First all drivers had to add a meta dependency to make sure
they are not built in when devlink is built as a module.  Now
we are struggling to invoke ethtool compat code reliably.

Make devlink code built-in, users can still not build it at
all but the dynamically loadable module option is removed.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: remove unused struct inet_frag_queue.fragments field

Now that all users of struct inet_frag_queue have been converted
to use 'rb_fragments', remove the unused 'fragments' field.

Build with `make allyesconfig` succeeded. ip_defrag selftest passed.

Signed-off-by: Peter Oskolkov <posk@google.com>
Acked-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: wan: z85230: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles

dev_consume_skb_irq() should be called in z8530_tx_done() when skb
xmit done. It makes drop profiles(dropwatch, perf) more friendly.

Signed-off-by: Yang Wei <yang.wei9@zte.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: wan: cosa: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles

dev_consume_skb_irq() should be called in cosa_net_tx_done() when skb
xmit done. It makes drop profiles(dropwatch, perf) more friendly.

Signed-off-by: Yang Wei <yang.wei9@zte.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: wan: sbni: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles

dev_consume_skb_irq() should be called in send_complete() when skb
xmit done. It makes drop profiles(dropwatch, perf) more friendly.

Signed-off-by: Yang Wei <yang.wei9@zte.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: wan: ixp4xx_hss: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles

dev_consume_skb_irq() should be called in hss_hdlc_txdone_irq() when
skb xmit done. It makes drop profiles(dropwatch, perf) more friendly.

Signed-off-by: Yang Wei <yang.wei9@zte.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: wan: wanxl: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles

dev_consume_skb_irq() should be called in wanxl_tx_intr() when skb
xmit done. It makes drop profiles(dropwatch, perf) more friendly.

Signed-off-by: Yang Wei <yang.wei9@zte.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: lmc: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles

dev_consume_skb_irq() should be called in lmc_interrupt() when skb
xmit done. It makes drop profiles(dropwatch, perf) more friendly.

Delete a redundant comment line in lmc_interrupt().

Signed-off-by: Yang Wei <yang.wei9@zte.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'pie-next'

Leslie Monis says:

====================
net: sched: pie: align PIE implementation with RFC 8033

The current implementation of the PIE queuing discipline is according to the
IETF draft [http://tools.ietf.org/html/draft-pan-aqm-pie-00] and the paper
[PIE: A Lightweight Control Scheme to Address the Bufferbloat Problem].
However, a lot of necessary modifications and enhancements have been proposed
in RFC 8033, which have not yet been incorporated in the source code of Linux.
This patch series helps in achieving the same.

Performance tests carried out using Flent [https://flent.org/]

Changes from v2 to v3:
  - Used div_u64() instead of direct division after explicit type casting as
    recommended by David

Changes from v1 to v2:
  - Excluded the patch setting PIE dynamically active/inactive as the test
    results were unsatisfactory
  - Fixed a scaling issue when adding more auto-tuning cases which caused
    local variables to underflow
  - Changed the long if/else chain to a loop as suggested by Stephen
  - Changed the position of the accu_prob variable in the pie_vars
    structure as recommended by Stephen
====================

Acked-by: Dave Taht <dave.taht@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: sched: pie: update references

RFC 8033 replaces the IETF draft for PIE

Signed-off-by: Mohit P. Tahiliani <tahiliani@nitk.edu.in>
Signed-off-by: Dhaval Khandla <dhavaljkhandla26@gmail.com>
Signed-off-by: Hrishikesh Hiraskar <hrishihiraskar@gmail.com>
Signed-off-by: Manish Kumar B <bmanish15597@gmail.com>
Signed-off-by: Sachin D. Patil <sdp.sachin@gmail.com>
Signed-off-by: Leslie Monis <lesliemonis@gmail.com>
Acked-by: Dave Taht <dave.taht@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: sched: pie: add derandomization mechanism

Random dropping of packets to achieve latency control may
introduce outlier situations where packets are dropped too
close to each other or too far from each other. This can
cause the real drop percentage to temporarily deviate from
the intended drop probability. In certain scenarios, such
as a small number of simultaneous TCP flows, these
deviations can cause significant deviations in link
utilization and queuing latency.

RFC 8033 suggests using a derandomization mechanism to avoid
these deviations.

Signed-off-by: Mohit P. Tahiliani <tahiliani@nitk.edu.in>
Signed-off-by: Dhaval Khandla <dhavaljkhandla26@gmail.com>
Signed-off-by: Hrishikesh Hiraskar <hrishihiraskar@gmail.com>
Signed-off-by: Manish Kumar B <bmanish15597@gmail.com>
Signed-off-by: Sachin D. Patil <sdp.sachin@gmail.com>
Signed-off-by: Leslie Monis <lesliemonis@gmail.com>
Acked-by: Dave Taht <dave.taht@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: sched: pie: add more cases to auto-tune alpha and beta

The current implementation scales the local alpha and beta
variables in the calculate_probability function by the same
amount for all values of drop probability below 1%.

RFC 8033 suggests using additional cases for auto-tuning
alpha and beta when the drop probability is less than 1%.

In order to add more auto-tuning cases, MAX_PROB must be
scaled by u64 instead of u32 to prevent underflow when
scaling the local alpha and beta variables in the
calculate_probability function.

Signed-off-by: Mohit P. Tahiliani <tahiliani@nitk.edu.in>
Signed-off-by: Dhaval Khandla <dhavaljkhandla26@gmail.com>
Signed-off-by: Hrishikesh Hiraskar <hrishihiraskar@gmail.com>
Signed-off-by: Manish Kumar B <bmanish15597@gmail.com>
Signed-off-by: Sachin D. Patil <sdp.sachin@gmail.com>
Signed-off-by: Leslie Monis <lesliemonis@gmail.com>
Acked-by: Dave Taht <dave.taht@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: sched: pie: change initial value of pie_vars->burst_time

RFC 8033 suggests an initial value of 150 milliseconds for
the maximum time allowed for a burst of packets.

Signed-off-by: Mohit P. Tahiliani <tahiliani@nitk.edu.in>
Signed-off-by: Dhaval Khandla <dhavaljkhandla26@gmail.com>
Signed-off-by: Hrishikesh Hiraskar <hrishihiraskar@gmail.com>
Signed-off-by: Manish Kumar B <bmanish15597@gmail.com>
Signed-off-by: Sachin D. Patil <sdp.sachin@gmail.com>
Signed-off-by: Leslie Monis <lesliemonis@gmail.com>
Acked-by: Dave Taht <dave.taht@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: sched: pie: change default value of pie_params->tupdate

RFC 8033 suggests a default value of 15 milliseconds for the
update interval.

Signed-off-by: Mohit P. Tahiliani <tahiliani@nitk.edu.in>
Signed-off-by: Dhaval Khandla <dhavaljkhandla26@gmail.com>
Signed-off-by: Hrishikesh Hiraskar <hrishihiraskar@gmail.com>
Signed-off-by: Manish Kumar B <bmanish15597@gmail.com>
Signed-off-by: Sachin D. Patil <sdp.sachin@gmail.com>
Signed-off-by: Leslie Monis <lesliemonis@gmail.com>
Acked-by: Dave Taht <dave.taht@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: sched: pie: change default value of pie_params->target

RFC 8033 suggests a default value of 15 milliseconds for the
target queue delay.

Signed-off-by: Mohit P. Tahiliani <tahiliani@nitk.edu.in>
Signed-off-by: Dhaval Khandla <dhavaljkhandla26@gmail.com>
Signed-off-by: Hrishikesh Hiraskar <hrishihiraskar@gmail.com>
Signed-off-by: Manish Kumar B <bmanish15597@gmail.com>
Signed-off-by: Sachin D. Patil <sdp.sachin@gmail.com>
Signed-off-by: Leslie Monis <lesliemonis@gmail.com>
Acked-by: Dave Taht <dave.taht@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: sched: pie: change value of QUEUE_THRESHOLD

RFC 8033 recommends a value of 16384 bytes for the queue
threshold.

Signed-off-by: Mohit P. Tahiliani <tahiliani@nitk.edu.in>
Signed-off-by: Dhaval Khandla <dhavaljkhandla26@gmail.com>
Signed-off-by: Hrishikesh Hiraskar <hrishihiraskar@gmail.com>
Signed-off-by: Manish Kumar B <bmanish15597@gmail.com>
Signed-off-by: Sachin D. Patil <sdp.sachin@gmail.com>
Signed-off-by: Leslie Monis <lesliemonis@gmail.com>
Acked-by: Dave Taht <dave.taht@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

mlxsw: spectrum: acl: Use struct_size() in kzalloc()

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 = kzalloc(size, GFP_KERNEL)

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

instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL)

Notice that, in this case, variable alloc_size is not necessary, hence
it is removed.

This code was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch 'aquantia-hwmon'

Heiner Kallweit says:

====================
net: phy: aquantia: add hwmon support

This series adds HWMON support for the temperature sensor and the
related alarms on the 107/108/109 chips.

v2:
- remove struct aqr_priv
- rename header file to aquantia.h
v3:
- add conditional compiling of aquantia_hwmon.c
- improve converting sensor register values to/from long
- add helper aqr_hwmon_test_bit
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

net: phy: aquantia: add hwmon support

This adds HWMON support for the temperature sensor and the related
alarms on the 107/108/109 chips. This patch is based on work from
Nikita and Andrew. I added:
- support for changing alarm thresholds via sysfs
- move HWMON code to a separate source file to improve maintainability
- smaller changes like using IS_REACHABLE instead of ifdef
  (avoids problems if PHY driver is built in and HWMON is a module)

v2:
- remove struct aqr_priv
- rename header file to aquantia.h
v3:
- add conditional compiling of aquantia_hwmon.c
- improve converting sensor register values to/from long
- add helper aqr_hwmon_test_bit

Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: phy: aquantia: rename aquantia.c to aquantia_main.c

Rename aquantia.c to aquantia_main.c to be prepared for adding new
functionality to separate source code files.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch '100GbE' of git://git./linux/kernel/git/jkirsher/next-queue

Jeff Kirsher says:

====================
100GbE Intel Wired LAN Driver Updates 2019-02-22

This series contains updates to the ice driver only.

Bruce adds the __always_unused attribute to a parameter to avoid
compiler warnings when using -Wunused-parameter.  Fixed unnecessary
type-casting and the use of sizeof().  Fix the allocation of structs
that have become memory hogs, so allocate them in heaps and fix all the
associated references.  Fixed the "possible" numeric overflow issues
that were caught with static analysis.

Maciej fixes the maximum MTU calculation by taking into account double
VLAN tagging amd ensure that the operations are done in the correct
order.

Victor fixes the supported node calculation, where we were not taking
into account if there is space to add the new VSI or intermediate node
above that layer, then it is not required to continue the calculation.
Added a check for a leaf node presence for a given VSI, which is needed
before removing a VSI.

Jake fixes an issue where the VSI list is shared, so simply removing a
VSI from the list will cause issues for the other users who reference
the list.  Since we also free the memory, this could lead to
segmentation faults.

Brett fixes an issue where driver unload could cause a system reboot
when intel_iommu=on parameter is set.  The issue is that we are not
clearing the CAUSE_ENA bit for the appropriate control queues register
when freeing the miscellaneous interrupt vector.

Mitch is so kind, he prevented spamming the VF with link messages when
the link status really has not changed.  Updates the driver to use the
absolute vector ID and not the per-PF vector ID for the VF MSIx vector
allocation.

Lukasz fixes the ethtool pause parameter for the ice driver, which was
originally based off the link status but is now based off the PHY
configuration.  This is to resolve an issue where pause parameters could
be set while link was down.

Jesse updates the string that reports statistics so the string does not
get modified at runtime and cause reports of string truncation.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

net: sched: don't release block->lock when dumping chains

Function tc_dump_chain() obtains and releases block->lock on each iteration
of its inner loop that dumps all chains on block. Outputting chain template
info is fast operation so locking/unlocking mutex multiple times is an
overhead when lock is highly contested. Modify tc_dump_chain() to only
obtain block->lock once and dump all chains without releasing it.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Suggested-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: sched: set dedicated tcf_walker flag when tp is empty

Using tcf_walker->stop flag to determine when tcf_walker->fn() was called
at least once is unreliable. Some classifiers set 'stop' flag on error
before calling walker callback, other classifiers used to call it with NULL
filter pointer when empty. In order to prevent further regressions, extend
tcf_walker structure with dedicated 'nonempty' flag. Set this flag in
tcf_walker->fn() implementation that is used to check if classifier has
filters configured.

Fixes: 8b64678e0af8 ("net: sched: refactor tp insert/delete for concurrent execution")
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Suggested-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: mv88e6xxx: Fix phylink_validate for Topaz family

The Topaz family should have different phylink_validate method from the
Peridot, since on Topaz the port supporting 2500BaseX mode is port 5,
not 9 and 10.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: mv88e6xxx: Default CMODE to 1000BaseX only on 6390X

Commit 787799a9d555 sets the SERDES interfaces of 6390 and 6390X to
1000BaseX, but this is only needed on 6390X, since there are SERDES
interfaces which can be used on lower ports on 6390.

This commit fixes this by returning to previous behaviour on 6390.
(Previous behaviour means that CMODE is not set at all if requested mode
is NA).

This is needed on Turris MOX, where the 88e6190 is connected to CPU in
2500BaseX mode.

Fixes: 787799a9d555 ("net: dsa: mv88e6xxx: Default ports 9/10 6390X CMODE to 1000BaseX")
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tcp: clean up SOCK_DEBUG()

Per discussion with Daniel[1] and Eric[2], these SOCK_DEBUG() calles in
TCP are not needed now.
We'd better clean up it.

[1] https://patchwork.ozlabs.org/patch/1035573/
[2] https://patchwork.ozlabs.org/patch/1040533/

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tcp: remove unused parameter of tcp_sacktag_bsearch()

parameter state in the tcp_sacktag_bsearch() is not used.
So, it can be removed.

Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ice: fix overlong string, update stats output

A test started warning on a string truncation. This led to an unfortunate
realization that we are likely not accounting for the stats length
correctly before this patch, so fix the issue by putting "port." in front
of all the PF stats, instead of magically prepending it at runtime.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

ice: Fix for FC get rx/tx pause params

Ethtool reported pause params based on the currently negotiated
link settings instead of current PHY config. User was not able
to turn off pause params because ethtool was incorrectly reporting
parameters as off when link was down even though PHY was configured
to support pause frames. Now pause params are taken from PHY config
instead of link status.

Signed-off-by: Lukasz Czapnik <lukasz.czapnik@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>