Add a helper to directly set the IPV6_RECVPKTINFO sockopt from kernel
space without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the IPV6_ADD_PREFERENCES sockopt from kernel
space without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the IPV6_RECVERR sockopt from kernel space
without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the IPV6_V6ONLY sockopt from kernel space
without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the IP_PKTINFO sockopt from kernel
space without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the IP_MTU_DISCOVER sockopt from kernel
space without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Howells <dhowells@redhat.com> [rxrpc bits]
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the IP_RECVERR sockopt from kernel space
without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the IP_FREEBIND sockopt from kernel space
without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the IP_TOS sockopt from kernel space without
going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the TCP_KEEPCNT sockopt from kernel space
without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the TCP_KEEPINTVL sockopt from kernel space
without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the TCP_KEEP_IDLE sockopt from kernel
space without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the TCP_USER_TIMEOUT sockopt from kernel
space without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the TCP_SYNCNT sockopt from kernel space
without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the TCP_QUICKACK sockopt from kernel space
without going through a fake uaccess.  Cleanup the callers to avoid
pointless wrappers now that this is a simple function call.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the TCP_NODELAY sockopt from kernel space
without going through a fake uaccess.  Cleanup the callers to avoid
pointless wrappers now that this is a simple function call.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Acked-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the TCP_CORK sockopt from kernel space
without going through a fake uaccess.  Cleanup the callers to avoid
pointless wrappers now that this is a simple function call.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the SO_REUSEPORT sockopt from kernel space
without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the SO_RCVBUFFORCE sockopt from kernel space
without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the SO_KEEPALIVE sockopt from kernel space
without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly enable timestamps instead of setting the
SO_TIMESTAMP* sockopts from kernel space and going through a fake
uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the SO_BINDTOIFINDEX sockopt from kernel
space without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the SO_SNDTIMEO_NEW sockopt from kernel
space without going through a fake uaccess.  The interface is
simplified to only pass the seconds value, as that is the only
thing needed at the moment.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the SO_PRIORITY sockopt from kernel space
without going through a fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the SO_LINGER sockopt from kernel space
with onoff set to true and a linger time of 0 without going through a
fake uaccess.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a helper to directly set the SO_REUSEADDR sockopt from kernel space
without going through a fake uaccess.

For this the iscsi target now has to formally depend on inet to avoid
a mostly theoretical compile failure.  For actual operation it already
did depend on having ipv4 or ipv6 support.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: David S. Miller <davem@davemloft.net>

Saeed Mahameed says:

====================
mlx5-updates-2020-05-26

Updates highlights:

1) From Vu Pham (8): Support VM traffics failover with bonded VF
representors and e-switch egress/ingress ACLs

This series introduce the support for Virtual Machine running I/O
traffic over direct/fast VF path and failing over to slower
paravirtualized path using the following features:

     __________________________________
    |  VM      _________________        |
    |          |FAILOVER device |       |
    |          |________________|       |
    |                  |                |
    |              ____|_____           |
    |              |         |          |
    |       ______ |___  ____|_______   |
    |       |  VF PT  |  |VIRTIO-NET |  |
    |       | device  |  | device    |  |
    |       |_________|  |___________|  |
    |___________|______________|________|
                |              |
                | HYPERVISOR   |
                |          ____|______
                |         |  macvtap  |
                |         |virtio BE  |
                |         |___________|
                |               |
                |           ____|_____
                |           |host VF  |
                |           |_________|
                |               |
           _____|______    _____|_____
           |  PT VF    |  |  host VF  |
           |representor|  |representor|
           |___________|  |___________|
                \               /
                 \             /
                  \           /
                   \         /                     _________________
                    \_______/                     |                |
                 _______|________                 |    V-SWITCH    |
                |VF representors |________________|      (OVS)     |
                |      bond      |                |________________|
                |________________|                        |
                                                  ________|________
                                                 |    Uplink       |
                                                 |  representor    |
                                                 |_________________|

Summary:
--------
Problem statement:
------------------
Currently in above topology, when netfailover device is configured using
VFs and eswitch VF representors, and when traffic fails over to stand-by
VF which is exposed using macvtap device to guest VM, eswitch fails to
switch the traffic to the stand-by VF representor. This occurs because
there is no knowledge at eswitch level of the stand-by representor
device.

Solution:
---------
Using standard bonding driver, a bond netdevice is created over VF
representor device which is used for offloading tc rules.
Two VF representors are bonded together, one for the passthrough VF
device and another one for the stand-by VF device.
With this solution, mlx5 driver listens to the failover events
occuring at the bond device level to failover traffic to either of
the active VF representor of the bond.

a. VM with netfailover device of VF pass-thru (PT) device and virtio-net
   paravirtualized device with same MAC-address to handle failover
   traffics at VM level.

b. Host bond is active-standby mode, with the lower devices being the VM
   VF PT representor, and the representor of the 2nd VF to handle
   failover traffics at Hypervisor/V-Switch OVS level.
   - During the steady state (fast datapath): set the bond active
     device to be the VM PT VF representor.
   - During failover: apply bond failover to the second VF representor
     device which connects to the VM non-accelerated path.

c. E-Switch ingress/egress ACL tables to support failover traffics at
   E-Switch level
   I. E-Switch egress ACL with forward-to-vport rule:
     - By default, eswitch vport egress acl forward packets to its
       counterpart NIC vport.
     - During port failover, the egress acl forward-to-vport rule will
       be added to e-switch vport of passive/in-active slave VF
representor
       to forward packets to other e-switch vport ie. the active slave
       representor's e-switch vport to handle egress "failover"
traffics.
     - Using lower change netdev event to detect a representor is a
       lower
       dev (slave) of bond and becomes active, adding egress acl
       forward-to-vport rule of all other slave netdevs to forward to
this
       representor's vport.
     - Using upper change netdev event to detect a representor unslaving
       from bond device to delete its vport's egress acl forward-to-vport
       rule.

   II. E-Switch ingress ACL metadata reg_c for match
     - Bonded representors' vorts sharing tc block have the same
       root ingress acl table and a unique metadata for match.
     - Traffics from both representors's vports will be tagged with same
       unique metadata reg_c.
     - Using upper change netdev event to detect a representor
       enslaving/unslaving from bond device to setup shared root ingress
       acl and unique metadata.

2) From Alex Vesker (2): Slpit RX and TX lock for parallel rule insertion in
software steering

3) Eli Britstein (2): Optimize performance for IPv4/IPv6 ethertype use the HW
ip_version register rather than parsing eth frames for ethertype.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Make tcp_ld_RTO_revert() helper available to IPv6, and
implement RFC 6069 :

Quoting this RFC :

3. Connectivity Disruption Indication

   For Internet Protocol version 6 (IPv6) [RFC2460], the counterpart of
   the ICMP destination unreachable message of code 0 (net unreachable)
   and of code 1 (host unreachable) is the ICMPv6 destination
   unreachable message of code 0 (no route to destination) [RFC4443].
   As with IPv4, a router should generate an ICMPv6 destination
   unreachable message of code 0 in response to a packet that cannot be
   delivered to its destination address because it lacks a matching
   entry in its routing table.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

SJA1105, being AVB/TSN switches, provide hardware assist for the
Credit-Based Shaper as described in the IEEE 8021Q-2018 document.

First generation has 10 shapers, freely assignable to any of the 4
external ports and 8 traffic classes, and second generation has 16
shapers.

The Credit-Based Shaper tables are accessed through the dynamic
reconfiguration interface, so we have to restore them manually after a
switch reset. The tables are backed up by the static config only on
P/Q/R/S, and we don't want to add custom code only for that family,
since the procedure that is in place now works for both.

Tested with the following commands:

data_rate_kbps=67000
port_transmit_rate_kbps=1000000
idleslope=$data_rate_kbps
sendslope=$(($idleslope - $port_transmit_rate_kbps))
locredit=$((-0x80000000))
hicredit=$((0x7fffffff))
tc qdisc add dev swp2 root handle 1: mqprio hw 0 num_tc 8 \
        map 0 1 2 3 4 5 6 7 \
        queues 1@0 1@1 1@2 1@3 1@4 1@5 1@6 1@7
tc qdisc replace dev swp2 parent 1:1 cbs \
        idleslope $idleslope \
        sendslope $sendslope \
        hicredit $hicredit \
        locredit $locredit \
        offload 1
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add Nik's torture tests as a new set to stress the replace and cleanup
paths.

Torture test created by Nikolay Aleksandrov and then I adapted to
selftest and added IPv6 version.
Signed-off-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Change the locking flow to support RX and TX locks, splitting
the single lock to two will allow inserting rules in parallel
for RX and TX parts of the FDB.

Locking the dr_domain will be done by locking the RX domain
and the TX domain locks, this is mostly used for control operations
on the dr_domain. When inserting rules for RX or TX the single
nic_doamin RX or TX lock will be used. Splitting the lock is safe since
RX and TX domains are logically separated from each other, shared
objects such the send-ring and memory pool are protected by locks.
Signed-off-by: Alex Vesker <valex@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Adding this lock will allow writing steering entries without
locking the dr_domain and allow parallel insertion.
Signed-off-by: Alex Vesker <valex@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

The HW is optimized for IPv4/IPv6. For such cases, pending capability,
avoid matching on ethertype, and use ip_version field instead.
Signed-off-by: Eli Britstein <elibr@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Set ethertype match in a helper function as a pre-step towards
optimizing it.
Signed-off-by: Eli Britstein <elibr@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Add mutex destroy calls to balance with mutex_init() done in the init
path.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Use change upper event to detect slave representor from
enslaving/unslaving to/from lag device.

On enslaving event, call mlx5_enslave_rep() API to create, add
this slave representor shadow entry to the slaves list of
bond_metadata structure representing master lag device and use
its metadata to setup ingress acl metadata header.

On unslaving event, resetting the vport of unslaved representor
to use its default ingress/egress acls and rx rules with its
default_metadata.

The last slave will free the shared bond_metadata and its
unique metadata.
Signed-off-by: Vu Pham <vuhuong@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Bonded slave representors' vports must share a unique metadata
for match.

On enslaving event of slave representor to lag device, allocate
new unique "bond_metadata" for match if this is the first slave.
The subsequent enslaved representors will share the same unique
"bond_metadata".

On unslaving event of slave representor, reset the slave
representor's vport to use its own default metadata.

Replace ingress acl and rx rules of the slave representors' vports
using new vport->bond_metadata.
Signed-off-by: Vu Pham <vuhuong@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Introduce infrastructure to create unique metadata for match
for vport without depending on vport_num. Vport uses its
default metadata for match in standalone configuration but
will share a different unique "bond_metadata" for match with
other vports in bond configuration.

Using ida to generate unique metadata for match for vports
in default and bond configurations.

Introduce APIs to generate, free metadata for match.
Introduce APIs to set vport's bond_metadata and replace its
ingress acl rules with bond_metatada.
Signed-off-by: Vu Pham <vuhuong@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

Adding bond_metadata and its slave entries to represent a lag device
and its slaves VF representors. Bond_metadata structure includes a
unique metadata shared by slaves VF respresentors, and a list of slaves
representors slave entries.

On enslaving event, create a bond_metadata structure representing
the upper lag device of this slave representor if it has not been
created yet. Create and add entry for the slave representor to the
slaves list.

On unslaving event, free the slave entry of the slave representor.
On the last unslave event, free the bond_metadata structure and its
resources.

Introduce APIs to create and remove bond_metadata and its resources,
enslave and unslave VF representor slave entries.
Signed-off-by: Vu Pham <vuhuong@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

When a bond device is created over one or more non uplink representors,
and when a flow rule is offloaded to such bond device, offload a rule
to the active lower device.

Assuming that this is active-backup lag, the rules should be offloaded
to the active lower device which is the representor of the direct
path (not the failover).
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Vu Pham <vuhuong@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>