linux-2.6-microblaze.git
2 years agonet: dsa: mv88e6xxx: Add support for bridge port locked mode
Hans Schultz [Wed, 23 Feb 2022 10:16:49 +0000 (11:16 +0100)]
net: dsa: mv88e6xxx: Add support for bridge port locked mode

Supporting bridge ports in locked mode using the drop on lock
feature in Marvell mv88e6xxx switchcores is described in the
'88E6096/88E6097/88E6097F Datasheet', sections 4.4.6, 4.4.7 and
5.1.2.1 (Drop on Lock).

This feature is implemented here facilitated by the locked port flag.

Signed-off-by: Hans Schultz <schultz.hans+netdev@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: Include BR_PORT_LOCKED in the list of synced brport flags
Hans Schultz [Wed, 23 Feb 2022 10:16:48 +0000 (11:16 +0100)]
net: dsa: Include BR_PORT_LOCKED in the list of synced brport flags

Ensures that the DSA switch driver gets notified of changes to the
BR_PORT_LOCKED flag as well, for the case when a DSA port joins or
leaves a LAG that is a bridge port.

Signed-off-by: Hans Schultz <schultz.hans+netdev@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: bridge: Add support for offloading of locked port flag
Hans Schultz [Wed, 23 Feb 2022 10:16:47 +0000 (11:16 +0100)]
net: bridge: Add support for offloading of locked port flag

Various switchcores support setting ports in locked mode, so that
clients behind locked ports cannot send traffic through the port
unless a fdb entry is added with the clients MAC address.

Signed-off-by: Hans Schultz <schultz.hans+netdev@gmail.com>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: bridge: Add support for bridge port in locked mode
Hans Schultz [Wed, 23 Feb 2022 10:16:46 +0000 (11:16 +0100)]
net: bridge: Add support for bridge port in locked mode

In a 802.1X scenario, clients connected to a bridge port shall not
be allowed to have traffic forwarded until fully authenticated.
A static fdb entry of the clients MAC address for the bridge port
unlocks the client and allows bidirectional communication.

This scenario is facilitated with setting the bridge port in locked
mode, which is also supported by various switchcore chipsets.

Signed-off-by: Hans Schultz <schultz.hans+netdev@gmail.com>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agodrop_monitor: remove quadratic behavior
Eric Dumazet [Tue, 22 Feb 2022 22:04:50 +0000 (14:04 -0800)]
drop_monitor: remove quadratic behavior

drop_monitor is using an unique list on which all netdevices in
the host have an element, regardless of their netns.

This scales poorly, not only at device unregister time (what I
caught during my netns dismantle stress tests), but also at packet
processing time whenever trace_napi_poll_hit() is called.

If the intent was to avoid adding one pointer in 'struct net_device'
then surely we prefer O(1) behavior.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'mlxsw-next'
David S. Miller [Wed, 23 Feb 2022 12:38:17 +0000 (12:38 +0000)]
Merge branch 'mlxsw-next'

Ido Schimmel says:

====================
mlxsw: Various updates

This patchset contains miscellaneous updates to mlxsw gathered over
time.

Patches #1-#2 fix recent regressions present in net-next.

Patches #3-#11 are small cleanups performed while adding line card
support in mlxsw.

Patch #12 adds the SFF-8024 Identifier Value of OSFP transceiver in
order to be able to dump their EEPROM contents over the ethtool IOCTL
interface.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomlxsw: core: Add support for OSFP transceiver modules
Danielle Ratson [Tue, 22 Feb 2022 17:17:03 +0000 (19:17 +0200)]
mlxsw: core: Add support for OSFP transceiver modules

The driver can already dump the EEPROM contents of QSFP-DD transceiver
modules via its ethtool_ops::get_module_info() and
ethtool_ops::get_module_eeprom() callbacks.

Add support for OSFP transceiver modules by adding their SFF-8024
Identifier Value (0x19).

This is required for future NVIDIA Spectrum-4 based systems that will be
equipped with OSFP transceivers.

Signed-off-by: Danielle Ratson <danieller@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomlxsw: Remove resource query check
Ido Schimmel [Tue, 22 Feb 2022 17:17:02 +0000 (19:17 +0200)]
mlxsw: Remove resource query check

Since SwitchX-2 support was removed in commit b0d80c013b04 ("mlxsw:
Remove Mellanox SwitchX-2 ASIC support"), all the ASICs supported by
mlxsw support the resource query command.

Therefore, remove the resource query check and always query resources
from the device.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomlxsw: core: Unify method of trap support validation
Vadim Pasternak [Tue, 22 Feb 2022 17:17:01 +0000 (19:17 +0200)]
mlxsw: core: Unify method of trap support validation

Currently there are several different features defined in 'mlxsw_driver'
for trap support validation. There is no reason to have dedicated
features for specific traps. Perform validation of all of them by
testing feature 'MLXSW_BUS_F_TXRX'.

Remove trap capability validation from 'core_env.c' which is redundant
after validation has been added to mlxsw_core_trap_register().

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomlxsw: spectrum: Remove SP{1,2,3} defines for FW minor and subminor
Jiri Pirko [Tue, 22 Feb 2022 17:17:00 +0000 (19:17 +0200)]
mlxsw: spectrum: Remove SP{1,2,3} defines for FW minor and subminor

The FW minor and subminor versions are the same for all generations of
Spectrum ASICs. Unify them into a single set of defines.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomlxsw: core: Remove unnecessary asserts
Vadim Pasternak [Tue, 22 Feb 2022 17:16:59 +0000 (19:16 +0200)]
mlxsw: core: Remove unnecessary asserts

Remove unnecessary asserts for module index validation. Leave only one
that is actually necessary in mlxsw_env_pmpe_listener_func() where the
module index is directly read from the firmware event.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomlxsw: reg: Add "mgpir_" prefix to MGPIR fields comments
Vadim Pasternak [Tue, 22 Feb 2022 17:16:58 +0000 (19:16 +0200)]
mlxsw: reg: Add "mgpir_" prefix to MGPIR fields comments

Do the same as for other registers and have "mgpir_" prefix for the
MGPIR fields.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomlxsw: core_thermal: Remove obsolete API for query resource
Vadim Pasternak [Tue, 22 Feb 2022 17:16:57 +0000 (19:16 +0200)]
mlxsw: core_thermal: Remove obsolete API for query resource

Remove obsolete API mlxsw_core_res_query_enabled(), which is only
relevant for end-of-life SwitchX-2 ASICs. Support for these ASICs was
removed in commit b0d80c013b04 ("mlxsw: Remove Mellanox SwitchX-2 ASIC
support").

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomlxsw: core_thermal: Rename labels according to naming convention
Vadim Pasternak [Tue, 22 Feb 2022 17:16:56 +0000 (19:16 +0200)]
mlxsw: core_thermal: Rename labels according to naming convention

Rename labels for error flow handling in order to align with naming
convention used in rest of 'mlxsw' code.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomlxsw: core_hwmon: Fix variable names for hwmon attributes
Vadim Pasternak [Tue, 22 Feb 2022 17:16:55 +0000 (19:16 +0200)]
mlxsw: core_hwmon: Fix variable names for hwmon attributes

Replace all local variables 'mlwsw_hwmon_attr' by 'mlxsw_hwmon_attr'.
All variable prefixes should start with 'mlxsw' according to the naming
convention, so 'mlwsw' is changed to 'mlxsw'.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomlxsw: core_thermal: Avoid creation of virtual hwmon objects by thermal module
Vadim Pasternak [Tue, 22 Feb 2022 17:16:54 +0000 (19:16 +0200)]
mlxsw: core_thermal: Avoid creation of virtual hwmon objects by thermal module

The driver registers with both the hwmon and thermal subsystems.
Therefore, there is no need for the thermal subsystem to automatically
create hwmon entries upon registration of a thermal zone, as this
results in duplicate information.

Avoid creation of virtual hwmon objects by thermal subsystem by
registering a thermal zone with 'no_hwmon' set to 'true'.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomlxsw: spectrum_span: Ignore VLAN entries not used by the bridge in mirroring
Ido Schimmel [Tue, 22 Feb 2022 17:16:53 +0000 (19:16 +0200)]
mlxsw: spectrum_span: Ignore VLAN entries not used by the bridge in mirroring

Only VLAN entries installed on the bridge device itself should be
considered when checking whether a packet with a specific VLAN can be
mirrored via a bridge device. VLAN entries only used to keep context
(i.e., entries with 'BRIDGE_VLAN_INFO_BRENTRY' unset) should be ignored.

Fix this by preventing mirroring when the VLAN entry does not have the
'BRIDGE_VLAN_INFO_BRENTRY' flag set.

Fixes: ddaff5047003 ("mlxsw: spectrum: remove guards against !BRIDGE_VLAN_INFO_BRENTRY")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomlxsw: core: Prevent trap group setting if driver does not support EMAD
Vadim Pasternak [Tue, 22 Feb 2022 17:16:52 +0000 (19:16 +0200)]
mlxsw: core: Prevent trap group setting if driver does not support EMAD

Avoid trap group setting if driver is not capable of EMAD support.
For example, "mlxsw_minimal" driver works over I2C bus, overs which
EMADs cannot be sent.
Validation is performed by testing feature 'MLXSW_BUS_F_TXRX'.

Fixes: 74e0494d35ac ("mlxsw: core: Move basic_trap_groups_set() call out of EMAD init code")
Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomctp: Fix warnings reported by clang-analyzer
Matt Johnston [Tue, 22 Feb 2022 04:29:36 +0000 (12:29 +0800)]
mctp: Fix warnings reported by clang-analyzer

net/mctp/device.c:140:11: warning: Assigned value is garbage or undefined
[clang-analyzer-core.uninitialized.Assign]
        mcb->idx = idx;

- Not a real problem due to how the callback runs, fix the warning.

net/mctp/route.c:458:4: warning: Value stored to 'msk' is never read
[clang-analyzer-deadcode.DeadStores]
        msk = container_of(key->sk, struct mctp_sock, sk);

- 'msk' dead assignment can be removed here.

Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'mctp-incorrect-addr-refs'
David S. Miller [Wed, 23 Feb 2022 12:29:15 +0000 (12:29 +0000)]
Merge branch 'mctp-incorrect-addr-refs'

Matt Johnston says:

====================
mctp: Fix incorrect refs for extended addr

This fixes an incorrect netdev unref and also addresses the race
condition identified by Jakub in v2. Thanks for the review.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomctp: Fix incorrect netdev unref for extended addr
Matt Johnston [Tue, 22 Feb 2022 04:17:39 +0000 (12:17 +0800)]
mctp: Fix incorrect netdev unref for extended addr

In the extended addressing local route output codepath
dev_get_by_index_rcu() doesn't take a dev_hold() so we shouldn't
dev_put().

Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomctp: make __mctp_dev_get() take a refcount hold
Matt Johnston [Tue, 22 Feb 2022 04:17:38 +0000 (12:17 +0800)]
mctp: make __mctp_dev_get() take a refcount hold

Previously there was a race that could allow the mctp_dev refcount
to hit zero:

rcu_read_lock();
mdev = __mctp_dev_get(dev);
// mctp_unregister() happens here, mdev->refs hits zero
mctp_dev_hold(dev);
rcu_read_unlock();

Now we make __mctp_dev_get() take the hold itself. It is safe to test
against the zero refcount because __mctp_dev_get() is called holding
rcu_read_lock and mctp_dev uses kfree_rcu().

Reported-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'dsa-realtek-phy-read-corruption'
David S. Miller [Wed, 23 Feb 2022 12:24:29 +0000 (12:24 +0000)]
Merge branch 'dsa-realtek-phy-read-corruption'

Alvin Šipraga says:

====================
net: dsa: realtek: fix PHY register read corruption

These two patches fix the issue reported by Arınç where PHY register
reads sometimes return garbage data.

v1 -> v2:

- no code changes
- just update the commit message of patch 2 to reflect the conclusion
  of further investigation requested by Vladimir
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: realtek: rtl8365mb: serialize indirect PHY register access
Alvin Šipraga [Mon, 21 Feb 2022 18:46:31 +0000 (19:46 +0100)]
net: dsa: realtek: rtl8365mb: serialize indirect PHY register access

Realtek switches in the rtl8365mb family can access the PHY registers of
the internal PHYs via the switch registers. This method is called
indirect access. At a high level, the indirect PHY register access
method involves reading and writing some special switch registers in a
particular sequence. This works for both SMI and MDIO connected
switches.

Currently the rtl8365mb driver does not take any care to serialize the
aforementioned access to the switch registers. In particular, it is
permitted for other driver code to access other switch registers while
the indirect PHY register access is ongoing. Locking is only done at the
regmap level. This, however, is a bug: concurrent register access, even
to unrelated switch registers, risks corrupting the PHY register value
read back via the indirect access method described above.

Arınç reported that the switch sometimes returns nonsense data when
reading the PHY registers. In particular, a value of 0 causes the
kernel's PHY subsystem to think that the link is down, but since most
reads return correct data, the link then flip-flops between up and down
over a period of time.

The aforementioned bug can be readily observed by:

 1. Enabling ftrace events for regmap and mdio
 2. Polling BSMR PHY register for a connected port;
    it should always read the same (e.g. 0x79ed)
 3. Wait for step 2 to give a different value

Example command for step 2:

    while true; do phytool read swp2/2/0x01; done

On my i.MX8MM, the above steps will yield a bogus value for the BSMR PHY
register within a matter of seconds. The interleaved register access it
then evident in the trace log:

 kworker/3:4-70      [003] .......  1927.139849: regmap_reg_write: ethernet-switch reg=1004 val=bd
     phytool-16816   [002] .......  1927.139979: regmap_reg_read: ethernet-switch reg=1f01 val=0
 kworker/3:4-70      [003] .......  1927.140381: regmap_reg_read: ethernet-switch reg=1005 val=0
     phytool-16816   [002] .......  1927.140468: regmap_reg_read: ethernet-switch reg=1d15 val=a69
 kworker/3:4-70      [003] .......  1927.140864: regmap_reg_read: ethernet-switch reg=1003 val=0
     phytool-16816   [002] .......  1927.140955: regmap_reg_write: ethernet-switch reg=1f02 val=2041
 kworker/3:4-70      [003] .......  1927.141390: regmap_reg_read: ethernet-switch reg=1002 val=0
     phytool-16816   [002] .......  1927.141479: regmap_reg_write: ethernet-switch reg=1f00 val=1
 kworker/3:4-70      [003] .......  1927.142311: regmap_reg_write: ethernet-switch reg=1004 val=be
     phytool-16816   [002] .......  1927.142410: regmap_reg_read: ethernet-switch reg=1f01 val=0
 kworker/3:4-70      [003] .......  1927.142534: regmap_reg_read: ethernet-switch reg=1005 val=0
     phytool-16816   [002] .......  1927.142618: regmap_reg_read: ethernet-switch reg=1f04 val=0
     phytool-16816   [002] .......  1927.142641: mdio_access: SMI-0 read  phy:0x02 reg:0x01 val:0x0000 <- ?!
 kworker/3:4-70      [003] .......  1927.143037: regmap_reg_read: ethernet-switch reg=1001 val=0
 kworker/3:4-70      [003] .......  1927.143133: regmap_reg_read: ethernet-switch reg=1000 val=2d89
 kworker/3:4-70      [003] .......  1927.143213: regmap_reg_write: ethernet-switch reg=1004 val=be
 kworker/3:4-70      [003] .......  1927.143291: regmap_reg_read: ethernet-switch reg=1005 val=0
 kworker/3:4-70      [003] .......  1927.143368: regmap_reg_read: ethernet-switch reg=1003 val=0
 kworker/3:4-70      [003] .......  1927.143443: regmap_reg_read: ethernet-switch reg=1002 val=6

The kworker here is polling MIB counters for stats, as evidenced by the
register 0x1004 that we are writing to (RTL8365MB_MIB_ADDRESS_REG). This
polling is performed every 3 seconds, but is just one example of such
unsynchronized access. In Arınç's case, the driver was not using the
switch IRQ, so the PHY subsystem was itself doing polling analogous to
phytool in the above example.

A test module was created [see second Link] to simulate such spurious
switch register accesses while performing indirect PHY register reads
and writes. Realtek was also consulted to confirm whether this is a
known issue or not. The conclusion of these lines of inquiry is as
follows:

1. Reading of PHY registers via indirect access will be aborted if,
   after executing the read operation (via a write to the
   INDIRECT_ACCESS_CTRL_REG), any register is accessed, other than
   INDIRECT_ACCESS_STATUS_REG.

2. The PHY register indirect read is only complete when
   INDIRECT_ACCESS_STATUS_REG reads zero.

3. The INDIRECT_ACCESS_DATA_REG, which is read to get the result of the
   PHY read, will contain the result of the last successful read
   operation. If there was spurious register access and the indirect
   read was aborted, then this register is not guaranteed to hold
   anything meaningful and the PHY read will silently fail.

4. PHY writes do not appear to be affected by this mechanism.

5. Other similar access routines, such as for MIB counters, although
   similar to the PHY indirect access method, are actually table access.
   Table access is not affected by spurious reads or writes of other
   registers. However, concurrent table access is not allowed. Currently
   this is protected via mib_lock, so there is nothing to fix.

The above statements are corroborated both via the test module and
through consultation with Realtek. In particular, Realtek states that
this is simply a property of the hardware design and is not a hardware
bug.

To fix this problem, one must guard against regmap access while the
PHY indirect register read is executing. Fix this by using the newly
introduced "nolock" regmap in all PHY-related functions, and by aquiring
the regmap mutex at the top level of the PHY register access callbacks.
Although no issue has been observed with PHY register _writes_, this
change also serializes the indirect access method there. This is done
purely as a matter of convenience and for reasons of symmetry.

Fixes: 4af2950c50c8 ("net: dsa: realtek-smi: add rtl8365mb subdriver for RTL8365MB-VC")
Link: https://lore.kernel.org/netdev/CAJq09z5FCgG-+jVT7uxh1a-0CiiFsoKoHYsAWJtiKwv7LXKofQ@mail.gmail.com/
Link: https://lore.kernel.org/netdev/871qzwjmtv.fsf@bang-olufsen.dk/
Reported-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Reported-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: realtek: allow subdrivers to externally lock regmap
Alvin Šipraga [Mon, 21 Feb 2022 18:46:30 +0000 (19:46 +0100)]
net: dsa: realtek: allow subdrivers to externally lock regmap

Currently there is no way for Realtek DSA subdrivers to serialize
consecutive regmap accesses. In preparation for a bugfix relating to
indirect PHY register access - which involves a series of regmap
reads and writes - add a facility for subdrivers to serialize their
regmap access.

Specifically, a mutex is added to the driver private data structure and
the standard regmap is initialized with custom lock/unlock ops which use
this mutex. Then, a "nolock" variant of the regmap is added, which is
functionally equivalent to the existing regmap except that regmap
locking is disabled. Functions that wish to serialize a sequence of
regmap accesses may then lock the newly introduced driver-owned mutex
before using the nolock regmap.

Doing things this way means that subdriver code that doesn't care about
serialized register access - i.e. the vast majority of code - needn't
worry about synchronizing register access with an external lock: it can
just continue to use the original regmap.

Another advantage of this design is that, while regmaps with locking
disabled do not expose a debugfs interface for obvious reasons, there
still exists the original regmap which does expose this interface. This
interface remains safe to use even combined with driver codepaths that
use the nolock regmap, because said codepaths will use the same mutex
to synchronize access.

With respect to disadvantages, it can be argued that having
near-duplicate regmaps is confusing. However, the naming is rather
explicit, and examples will abound.

Finally, while we are at it, rename realtek_smi_mdio_regmap_config to
realtek_smi_regmap_config. This makes it consistent with the naming
realtek_mdio_regmap_config in realtek-mdio.c.

Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: switchdev: avoid infinite recursion from LAG to bridge with port object handler
Vladimir Oltean [Mon, 21 Feb 2022 12:01:30 +0000 (14:01 +0200)]
net: switchdev: avoid infinite recursion from LAG to bridge with port object handler

The logic from switchdev_handle_port_obj_add_foreign() is directly
adapted from switchdev_handle_fdb_event_to_device(), which already
detects events on foreign interfaces and reoffloads them towards the
switchdev neighbors.

However, when we have a simple br0 <-> bond0 <-> swp0 topology and the
switchdev_handle_port_obj_add_foreign() gets called on bond0, we get
stuck into an infinite recursion:

1. bond0 does not pass check_cb(), so we attempt to find switchdev
   neighbor interfaces. For that, we recursively call
   __switchdev_handle_port_obj_add() for bond0's bridge, br0.

2. __switchdev_handle_port_obj_add() recurses through br0's lowers,
   essentially calling __switchdev_handle_port_obj_add() for bond0

3. Go to step 1.

This happens because switchdev_handle_fdb_event_to_device() and
switchdev_handle_port_obj_add_foreign() are not exactly the same.
The FDB event helper special-cases LAG interfaces with its lag_mod_cb(),
so this is why we don't end up in an infinite loop - because it doesn't
attempt to treat LAG interfaces as potentially foreign bridge ports.

The problem is solved by looking ahead through the bridge's lowers to
see whether there is any switchdev interface that is foreign to the @dev
we are currently processing. This stops the recursion described above at
step 1: __switchdev_handle_port_obj_add(bond0) will not create another
call to __switchdev_handle_port_obj_add(br0). Going one step upper
should only happen when we're starting from a bridge port that has been
determined to be "foreign" to the switchdev driver that passes the
foreign_dev_check_cb().

Fixes: c4076cdd21f8 ("net: switchdev: introduce switchdev_handle_port_obj_{add,del} for foreign interfaces")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoionic: use vmalloc include
Shannon Nelson [Wed, 23 Feb 2022 01:57:31 +0000 (17:57 -0800)]
ionic: use vmalloc include

The ever-vigilant Linux kernel test robot reminded us that
we need to use the correct include files to be sure that
all the build variations will work correctly.  Adding the
vmalloc.h include takes care of declaring our use of vzalloc()
and vfree().

drivers/net/ethernet/pensando/ionic/ionic_lif.c:396:17: error: implicit
declaration of function 'vfree'; did you mean 'kvfree'?

drivers/net/ethernet/pensando/ionic/ionic_lif.c:531:21: warning:
assignment to 'struct ionic_desc_info *' from 'int' makes pointer from
integer without a cast

Fixes: 116dce0ff047 ("ionic: Use vzalloc for large per-queue related buffers")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Link: https://lore.kernel.org/r/20220223015731.22025-1-snelson@pensando.io
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge branch 'tcp-take-care-of-another-syzbot-issue'
Jakub Kicinski [Wed, 23 Feb 2022 03:44:06 +0000 (19:44 -0800)]
Merge branch 'tcp-take-care-of-another-syzbot-issue'

Eric Dumazet says:

====================
tcp: take care of another syzbot issue

This is a minor issue: It took months for syzbot to find a C repro,
and even with it, I had to spend a lot of time to understand KFENCE
was a prereq. With the default kfence 500ms interval, I had to be
very patient to trigger the kernel warning and perform my analysis.

This series targets net-next tree, because I added a new generic helper
in the first patch, then fixed the issue in the second one.
They can be backported once proven solid.
====================

Link: https://lore.kernel.org/r/20220222032113.4005821-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: preserve skb_end_offset() in skb_unclone_keeptruesize()
Eric Dumazet [Tue, 22 Feb 2022 03:21:13 +0000 (19:21 -0800)]
net: preserve skb_end_offset() in skb_unclone_keeptruesize()

syzbot found another way to trigger the infamous WARN_ON_ONCE(delta < len)
in skb_try_coalesce() [1]

I was able to root cause the issue to kfence.

When kfence is in action, the following assertion is no longer true:

int size = xxxx;
void *ptr1 = kmalloc(size, gfp);
void *ptr2 = kmalloc(size, gfp);

if (ptr1 && ptr2)
ASSERT(ksize(ptr1) == ksize(ptr2));

We attempted to fix these issues in the blamed commits, but forgot
that TCP was possibly shifting data after skb_unclone_keeptruesize()
has been used, notably from tcp_retrans_try_collapse().

So we not only need to keep same skb->truesize value,
we also need to make sure TCP wont fill new tailroom
that pskb_expand_head() was able to get from a
addr = kmalloc(...) followed by ksize(addr)

Split skb_unclone_keeptruesize() into two parts:

1) Inline skb_unclone_keeptruesize() for the common case,
   when skb is not cloned.

2) Out of line __skb_unclone_keeptruesize() for the 'slow path'.

WARNING: CPU: 1 PID: 6490 at net/core/skbuff.c:5295 skb_try_coalesce+0x1235/0x1560 net/core/skbuff.c:5295
Modules linked in:
CPU: 1 PID: 6490 Comm: syz-executor161 Not tainted 5.17.0-rc4-syzkaller-00229-g4f12b742eb2b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:skb_try_coalesce+0x1235/0x1560 net/core/skbuff.c:5295
Code: bf 01 00 00 00 0f b7 c0 89 c6 89 44 24 20 e8 62 24 4e fa 8b 44 24 20 83 e8 01 0f 85 e5 f0 ff ff e9 87 f4 ff ff e8 cb 20 4e fa <0f> 0b e9 06 f9 ff ff e8 af b2 95 fa e9 69 f0 ff ff e8 95 b2 95 fa
RSP: 0018:ffffc900063af268 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 00000000ffffffd5 RCX: 0000000000000000
RDX: ffff88806fc05700 RSI: ffffffff872abd55 RDI: 0000000000000003
RBP: ffff88806e675500 R08: 00000000ffffffd5 R09: 0000000000000000
R10: ffffffff872ab659 R11: 0000000000000000 R12: ffff88806dd554e8
R13: ffff88806dd9bac0 R14: ffff88806dd9a2c0 R15: 0000000000000155
FS:  00007f18014f9700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002000 CR3: 000000006be7a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 tcp_try_coalesce net/ipv4/tcp_input.c:4651 [inline]
 tcp_try_coalesce+0x393/0x920 net/ipv4/tcp_input.c:4630
 tcp_queue_rcv+0x8a/0x6e0 net/ipv4/tcp_input.c:4914
 tcp_data_queue+0x11fd/0x4bb0 net/ipv4/tcp_input.c:5025
 tcp_rcv_established+0x81e/0x1ff0 net/ipv4/tcp_input.c:5947
 tcp_v4_do_rcv+0x65e/0x980 net/ipv4/tcp_ipv4.c:1719
 sk_backlog_rcv include/net/sock.h:1037 [inline]
 __release_sock+0x134/0x3b0 net/core/sock.c:2779
 release_sock+0x54/0x1b0 net/core/sock.c:3311
 sk_wait_data+0x177/0x450 net/core/sock.c:2821
 tcp_recvmsg_locked+0xe28/0x1fd0 net/ipv4/tcp.c:2457
 tcp_recvmsg+0x137/0x610 net/ipv4/tcp.c:2572
 inet_recvmsg+0x11b/0x5e0 net/ipv4/af_inet.c:850
 sock_recvmsg_nosec net/socket.c:948 [inline]
 sock_recvmsg net/socket.c:966 [inline]
 sock_recvmsg net/socket.c:962 [inline]
 ____sys_recvmsg+0x2c4/0x600 net/socket.c:2632
 ___sys_recvmsg+0x127/0x200 net/socket.c:2674
 __sys_recvmsg+0xe2/0x1a0 net/socket.c:2704
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Fixes: c4777efa751d ("net: add and use skb_unclone_keeptruesize() helper")
Fixes: 097b9146c0e2 ("net: fix up truesize of cloned skb in skb_prepare_for_shift()")
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Marco Elver <elver@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: add skb_set_end_offset() helper
Eric Dumazet [Tue, 22 Feb 2022 03:21:12 +0000 (19:21 -0800)]
net: add skb_set_end_offset() helper

We have multiple places where this helper is convenient,
and plan using it in the following patch.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoipv6: tcp: consistently use MAX_TCP_HEADER
Eric Dumazet [Tue, 22 Feb 2022 03:11:15 +0000 (19:11 -0800)]
ipv6: tcp: consistently use MAX_TCP_HEADER

All other skbs allocated for TCP tx are using MAX_TCP_HEADER already.

MAX_HEADER can be too small for some cases (like eBPF based encapsulation),
so this can avoid extra pskb_expand_head() in lower stacks.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20220222031115.4005060-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agotestptp: add option to shift clock by nanoseconds
Maciek Machnikowski [Mon, 21 Feb 2022 20:06:37 +0000 (21:06 +0100)]
testptp: add option to shift clock by nanoseconds

Add option to shift the clock by a specified number of nanoseconds.

The new argument -n will specify the number of nanoseconds to add to the
ptp clock. Since the API doesn't support negative shifts those needs to
be calculated by subtracting full seconds and adding a nanosecond offset.

Signed-off-by: Maciek Machnikowski <maciek@machnikowski.net>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Link: https://lore.kernel.org/r/20220221200637.125595-1-maciek@machnikowski.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agousbnet: gl620a: Replace one-element array with flexible-array member
Gustavo A. R. Silva [Mon, 21 Feb 2022 17:34:15 +0000 (11:34 -0600)]
usbnet: gl620a: Replace one-element array with flexible-array member

There is a regular need in the kernel to provide a way to declare having
a dynamically sized set of trailing elements in a structure. Kernel code
should always use “flexible array members”[1] for these cases. The older
style of one-element or zero-length arrays should no longer be used[2].

This helps with the ongoing efforts to globally enable -Warray-bounds
and get us closer to being able to tighten the FORTIFY_SOURCE routines
on memcpy().

This issue was found with the help of Coccinelle and audited and fixed,
manually.

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays

Link: https://github.com/KSPP/linux/issues/79
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20220221173415.GA1149599@embeddedor
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: phy: phylink: fix DSA mac_select_pcs() introduction
Russell King (Oracle) [Mon, 21 Feb 2022 17:10:52 +0000 (17:10 +0000)]
net: phy: phylink: fix DSA mac_select_pcs() introduction

Vladimir Oltean reports that probing on DSA drivers that aren't yet
populating supported_interfaces now fails. Fix this by allowing
phylink to detect whether DSA actually provides an underlying
mac_select_pcs() implementation.

Reported-by: Vladimir Oltean <olteanv@gmail.com>
Fixes: bde018222c6b ("net: dsa: add support for phylink mac_select_pcs()")
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/E1nMCD6-00A0wC-FG@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: dsa: microchip: ksz9477: reduce polling interval for statistics
Oleksij Rempel [Mon, 21 Feb 2022 08:41:29 +0000 (09:41 +0100)]
net: dsa: microchip: ksz9477: reduce polling interval for statistics

30 seconds is too long interval especially if it used with ip -s l.
Reduce polling interval to 5 sec.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20220221084129.3660124-1-o.rempel@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge branch 's390-net-updates-2022-02-21'
Jakub Kicinski [Wed, 23 Feb 2022 00:09:16 +0000 (16:09 -0800)]
Merge branch 's390-net-updates-2022-02-21'

Alexandra Winter says:

====================
s390/net: updates 2022-02-21

Just cleanup. No functional changes, as currently virt=phys in s390.
====================

Link: https://lore.kernel.org/r/20220221145633.3869621-1-wintera@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agos390/net: sort out physical vs virtual pointers usage
Alexander Gordeev [Mon, 21 Feb 2022 14:56:33 +0000 (15:56 +0100)]
s390/net: sort out physical vs virtual pointers usage

Fix virtual vs physical address confusion (which currently are the same).

Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agos390/iucv: sort out physical vs virtual pointers usage
Alexander Gordeev [Mon, 21 Feb 2022 14:56:32 +0000 (15:56 +0100)]
s390/iucv: sort out physical vs virtual pointers usage

Fix virtual vs physical address confusion (which currently are the same).

Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agogro_cells: avoid using synchronize_rcu() in gro_cells_destroy()
Eric Dumazet [Sun, 20 Feb 2022 04:11:55 +0000 (20:11 -0800)]
gro_cells: avoid using synchronize_rcu() in gro_cells_destroy()

Another thing making netns dismantles potentially very slow is located
in gro_cells_destroy(),
whenever cleanup_net() has to remove a device using gro_cells framework.

RTNL is not held at this stage, so synchronize_net()
is calling synchronize_rcu():

netdev_run_todo()
 ip_tunnel_dev_free()
  gro_cells_destroy()
   synchronize_net()
    synchronize_rcu() // Ouch.

This patch uses call_rcu(), and gave me a 25x performance improvement
in my tests.

cleanup_net() is no longer blocked ~10 ms per synchronize_rcu()
call.

In the case we could not allocate the memory needed to queue the
deferred free, use synchronize_rcu_expedited()

v2: made percpu_free_defer_callback() static

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Link: https://lore.kernel.org/r/20220220041155.607637-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge branch 'net-dsa-b53-non-legacy'
David S. Miller [Tue, 22 Feb 2022 11:03:02 +0000 (11:03 +0000)]
Merge branch 'net-dsa-b53-non-legacy'

Russell King says:

====================
net: dsa: b53: convert to phylink_generic_validate() and mark as non-legacy

This series converts b53 to use phylink_generic_validate() and also
marks this driver as non-legacy.

Patch 1 cleans up an if() condition to be more readable before we
proceed with the conversion.

Patch 2 populates the supported_interfaces and mac_capabilities members
of phylink_config.

Patch 3 drops the use of phylink_helper_basex_speed() which is now not
necessary.

Patch 4 switches the driver to use phylink_generic_validate()

Patch 5 marks the driver as non-legacy.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: b53: mark as non-legacy
Russell King (Oracle) [Tue, 22 Feb 2022 10:16:18 +0000 (10:16 +0000)]
net: dsa: b53: mark as non-legacy

The B53 driver does not make use of the speed, duplex, pause or
advertisement in its phylink_mac_config() implementation, so it can be
marked as a non-legacy driver.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: b53: switch to using phylink_generic_validate()
Russell King (Oracle) [Tue, 22 Feb 2022 10:16:13 +0000 (10:16 +0000)]
net: dsa: b53: switch to using phylink_generic_validate()

Switch the Broadcom b53 driver to using the phylink_generic_validate()
implementation by removing its own .phylink_validate method and
associated code.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: b53: drop use of phylink_helper_basex_speed()
Russell King (Oracle) [Tue, 22 Feb 2022 10:16:07 +0000 (10:16 +0000)]
net: dsa: b53: drop use of phylink_helper_basex_speed()

Now that we have a better method to select SFP interface modes, we
no longer need to use phylink_helper_basex_speed() in a driver's
validation function.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: b53: populate supported_interfaces and mac_capabilities
Russell King (Oracle) [Tue, 22 Feb 2022 10:16:02 +0000 (10:16 +0000)]
net: dsa: b53: populate supported_interfaces and mac_capabilities

Populate the supported interfaces and MAC capabilities for the Broadcom
B53 DSA switches in preparation to using these for the generic
validation functionality.

The interface modes are derived from:
- b53_serdes_phylink_validate()
- SRAB mux configuration

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: b53: clean up if() condition to be more readable
Russell King (Oracle) [Tue, 22 Feb 2022 10:15:57 +0000 (10:15 +0000)]
net: dsa: b53: clean up if() condition to be more readable

I've stared at this if() statement for a while trying to work out if
it really does correspond with the comment above, and it does seem to.
However, let's make it more readable and phrase it in the same way as
the comment.

Also add a FIXME into the comment - we appear to deny Gigabit modes for
802.3z interface modes, but 802.3z interface modes only operate at
gigabit and above.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dm9051: Fix use after free in dm9051_loop_tx()
Dan Carpenter [Mon, 21 Feb 2022 10:54:40 +0000 (13:54 +0300)]
net: dm9051: Fix use after free in dm9051_loop_tx()

This code dereferences "skb" after calling dev_kfree_skb().

Fixes: 2dc95a4d30ed ("net: Add dm9051 driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20220221105440.GA10045@kili
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: hsr: fix hsr build error when lockdep is not enabled
Juhee Kang [Sun, 20 Feb 2022 15:32:50 +0000 (15:32 +0000)]
net: hsr: fix hsr build error when lockdep is not enabled

In hsr, lockdep_is_held() is needed for rcu_dereference_bh_check().
But if lockdep is not enabled, lockdep_is_held() causes a build error:

    ERROR: modpost: "lockdep_is_held" [net/hsr/hsr.ko] undefined!

Thus, this patch solved by adding lockdep_hsr_is_held(). This helper
function calls the lockdep_is_held() when lockdep is enabled, and returns 1
if not defined.

Fixes: e7f27420681f ("net: hsr: fix suspicious RCU usage warning in hsr_node_get_first()")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Juhee Kang <claudiajkang@gmail.com>
Link: https://lore.kernel.org/r/20220220153250.5285-1-claudiajkang@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge branch 'octeontx2-ptp-updates'
David S. Miller [Mon, 21 Feb 2022 13:07:48 +0000 (13:07 +0000)]
Merge branch 'octeontx2-ptp-updates'

Rakesh Babu Saladi says:

====================
RVU AF and NETDEV drivers' PTP updates.

Patch 1: Add suppot such that RVU drivers support new timestamp format.
Patch 2: This patch adds workaround for PTP errata.

Changes made from  v1 to v2
1. CC'd Richard Cochran to review PTP related patches.
2. Removed a patch from the old patch series. Will submit the removed patch
separately.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoocteontx2-af: cn10k: add workaround for ptp errata
Naveen Mamindlapalli [Mon, 21 Feb 2022 06:45:08 +0000 (12:15 +0530)]
octeontx2-af: cn10k: add workaround for ptp errata

This patch adds workaround for PTP errata given below.

1. At the time of 1 sec rollover of nano-second counter,
   the nano-second counter is set to 0. However, it should
   be set to (existing counter_value - 10^9). This leads to
   an accumulating error in the timestamp value with each sec
   rollover.
2. Additionally, the nano-second counter currently is rolling
   over at 'h3B9A_C9FF. It should roll over at 'h3B9A_CA00.

The workaround for issue #1 is to speed up the ptp clock by
adjusting PTP_CLOCK_COMP register to the desired value to
compensate for the nanoseconds lost per each second.

The workaround for issue #2 is to slow down the ptp clock
such that the rollover occurs at ~1sec.

Signed-off-by: Naveen Mamindlapalli <naveenm@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Signed-off-by: Rakesh Babu Saladi <rsaladi2@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoocteontx2-pf: cn10k: add support for new ptp timestamp format
Naveen Mamindlapalli [Mon, 21 Feb 2022 06:45:07 +0000 (12:15 +0530)]
octeontx2-pf: cn10k: add support for new ptp timestamp format

The cn10k hardware ptp timestamp format has been modified primarily
to support 1-step ptp clock. The 64-bit timestamp used by hardware is
split into two 32-bit fields, the upper one holds seconds, the lower
one nanoseconds. A new register (PTP_CLOCK_SEC) has been added that
returns the current seconds value. The nanoseconds register PTP_CLOCK_HI
resets after every second. The cn10k RPM block provides Rx/Tx timestamps
to the NIX block using the new timestamp format. The software can read
the current timestamp in nanoseconds by reading both PTP_CLOCK_SEC &
PTP_CLOCK_HI registers.

This patch provides support for new timestamp format.

Signed-off-by: Naveen Mamindlapalli <naveenm@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Signed-off-by: Rakesh Babu Saladi <rsaladi2@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'bonding-ipv6-NA-NS-monitor'
David S. Miller [Mon, 21 Feb 2022 12:13:45 +0000 (12:13 +0000)]
Merge branch 'bonding-ipv6-NA-NS-monitor'

Hangbin Liu says:

====================
bonding: add IPv6 NS/NA monitor support

This patch add bond IPv6 NS/NA monitor support. A new option
ns_ip6_target is added, which is similar with arp_ip_target.
The IPv6 NS/NA monitor will take effect when there is a valid IPv6
address. Both ARP monitor and NS monitor will working at the same time.

A new extra storage field is added to struct bond_opt_value for IPv6 support.

Function bond_handle_vlan() is split from bond_arp_send() for both
IPv4/IPv6 usage.

To alloc NS message and send out. ndisc_ns_create() and ndisc_send_skb()
are exported.

v1 -> v2:
1. remove sysfs entry[1] and only keep netlink support.

RFC -> v1:
1. define BOND_MAX_ND_TARGETS as BOND_MAX_ARP_TARGETS
2. adjust for reverse xmas tree ordering of local variables
3. remove bond_do_ns_validate()
4. add extra field for bond_opt_value
5. set IS_ENABLED(CONFIG_IPV6) for IPv6 codes

[1] https://lore.kernel.org/netdev/8863.1645071997@famine
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agobonding: add new option ns_ip6_target
Hangbin Liu [Mon, 21 Feb 2022 05:54:57 +0000 (13:54 +0800)]
bonding: add new option ns_ip6_target

This patch add a new bonding option ns_ip6_target, which correspond
to the arp_ip_target. With this we set IPv6 targets and send IPv6 NS
request to determine the health of the link.

For other related options like the validation, we still use
arp_validate, and will change to ns_validate later.

Note: the sysfs configuration support was removed based on
https://lore.kernel.org/netdev/8863.1645071997@famine

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agobonding: add new parameter ns_targets
Hangbin Liu [Mon, 21 Feb 2022 05:54:56 +0000 (13:54 +0800)]
bonding: add new parameter ns_targets

Add a new bonding parameter ns_targets to store IPv6 address.
Add required bond_ns_send/rcv functions first before adding
IPv6 address option setting.

Add two functions bond_send/rcv_validate so we can send/recv
ARP and NS at the same time.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agobonding: add extra field for bond_opt_value
Hangbin Liu [Mon, 21 Feb 2022 05:54:55 +0000 (13:54 +0800)]
bonding: add extra field for bond_opt_value

Adding an extra storage field for bond_opt_value so we can set large
bytes of data for bonding options in future, e.g. IPv6 address.

Define a new call bond_opt_initextra(). Also change the checking order of
__bond_opt_init() and check values first.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoBonding: split bond_handle_vlan from bond_arp_send
Hangbin Liu [Mon, 21 Feb 2022 05:54:54 +0000 (13:54 +0800)]
Bonding: split bond_handle_vlan from bond_arp_send

Function bond_handle_vlan() is split from bond_arp_send() for later
IPv6 usage.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoipv6: separate ndisc_ns_create() from ndisc_send_ns()
Hangbin Liu [Mon, 21 Feb 2022 05:54:53 +0000 (13:54 +0800)]
ipv6: separate ndisc_ns_create() from ndisc_send_ns()

This patch separate NS message allocation steps from ndisc_send_ns(),
so it could be used in other places, like bonding, to allocate and
send IPv6 NS message.

Also export ndisc_send_skb() and ndisc_ns_create() for later bonding usage.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoravb: Use GFP_KERNEL instead of GFP_ATOMIC when possible
Christophe JAILLET [Sun, 20 Feb 2022 07:27:15 +0000 (08:27 +0100)]
ravb: Use GFP_KERNEL instead of GFP_ATOMIC when possible

'max_rx_len' can be up to GBETH_RX_BUFF_MAX (i.e. 8192) (see
'gbeth_hw_info').
The default value of 'num_rx_ring' can be BE_RX_RING_SIZE (i.e. 1024).

So this loop can allocate 8 Mo of memory.

Previous memory allocations in this function already use GFP_KERNEL, so
use __netdev_alloc_skb() and an explicit GFP_KERNEL instead of a
implicit GFP_ATOMIC.

This gives more opportunities of successful allocation.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: qualcomm: rmnet: Use skb_put_zero() to simplify code
Christophe JAILLET [Sun, 20 Feb 2022 06:36:59 +0000 (07:36 +0100)]
net: qualcomm: rmnet: Use skb_put_zero() to simplify code

Use skb_put_zero() instead of hand-writing it. This saves a few lines of
code and is more readable.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'ipv4-invalidate-broadcast-neigh-upon-address-addition'
David S. Miller [Mon, 21 Feb 2022 11:44:30 +0000 (11:44 +0000)]
Merge branch 'ipv4-invalidate-broadcast-neigh-upon-address-addition'

Ido Schimmel says:

====================
ipv4: Invalidate neighbour for broadcast address upon address addition

Patch #1 solves a recently reported issue [1]. See detailed description
in the changelog.

Patch #2 adds a matching test case.

Targeting at net-next since as far as I can tell this use case never
worked.

There are no regressions in fib_tests.sh with this change:

 # ./fib_tests.sh
 ...
 Tests passed: 186
 Tests failed:   0

[1] https://lore.kernel.org/netdev/55a04a8f-56f3-f73c-2aea-2195923f09d1@huawei.com/
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoselftests: fib_test: Add a test case for IPv4 broadcast neighbours
Ido Schimmel [Sat, 19 Feb 2022 15:45:20 +0000 (17:45 +0200)]
selftests: fib_test: Add a test case for IPv4 broadcast neighbours

Test that resolved neighbours for IPv4 broadcast addresses are
unaffected by the configuration of matching broadcast routes, whereas
unresolved neighbours are invalidated.

Without previous patch:

 # ./fib_tests.sh -t ipv4_bcast_neigh

 IPv4 broadcast neighbour tests
     TEST: Resolved neighbour for broadcast address                      [ OK ]
     TEST: Resolved neighbour for network broadcast address              [ OK ]
     TEST: Unresolved neighbour for broadcast address                    [FAIL]
     TEST: Unresolved neighbour for network broadcast address            [FAIL]

 Tests passed:   2
 Tests failed:   2

With previous patch:

 # ./fib_tests.sh -t ipv4_bcast_neigh

 IPv4 broadcast neighbour tests
     TEST: Resolved neighbour for broadcast address                      [ OK ]
     TEST: Resolved neighbour for network broadcast address              [ OK ]
     TEST: Unresolved neighbour for broadcast address                    [ OK ]
     TEST: Unresolved neighbour for network broadcast address            [ OK ]

 Tests passed:   4
 Tests failed:   0

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoipv4: Invalidate neighbour for broadcast address upon address addition
Ido Schimmel [Sat, 19 Feb 2022 15:45:19 +0000 (17:45 +0200)]
ipv4: Invalidate neighbour for broadcast address upon address addition

In case user space sends a packet destined to a broadcast address when a
matching broadcast route is not configured, the kernel will create a
unicast neighbour entry that will never be resolved [1].

When the broadcast route is configured, the unicast neighbour entry will
not be invalidated and continue to linger, resulting in packets being
dropped.

Solve this by invalidating unresolved neighbour entries for broadcast
addresses after routes for these addresses are internally configured by
the kernel. This allows the kernel to create a broadcast neighbour entry
following the next route lookup.

Another possible solution that is more generic but also more complex is
to have the ARP code register a listener to the FIB notification chain
and invalidate matching neighbour entries upon the addition of broadcast
routes.

It is also possible to wave off the issue as a user space problem, but
it seems a bit excessive to expect user space to be that intimately
familiar with the inner workings of the FIB/neighbour kernel code.

[1] https://lore.kernel.org/netdev/55a04a8f-56f3-f73c-2aea-2195923f09d1@huawei.com/

Reported-by: Wang Hai <wanghai38@huawei.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Tested-by: Wang Hai <wanghai38@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: core: Use csum_replace_by_diff() and csum_sub() instead of opencoding
Christophe Leroy [Fri, 18 Feb 2022 08:03:48 +0000 (09:03 +0100)]
net: core: Use csum_replace_by_diff() and csum_sub() instead of opencoding

Open coded calculation can be avoided and replaced by the
equivalent csum_replace_by_diff() and csum_sub().

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'tcp_drop_reason'
David S. Miller [Sun, 20 Feb 2022 13:55:31 +0000 (13:55 +0000)]
Merge branch 'tcp_drop_reason'

Menglong Dong says:

====================
net: add skb drop reasons to TCP packet receive

In the commit c504e5c2f964 ("net: skb: introduce kfree_skb_reason()"),
we added the support of reporting the reasons of skb drops to kfree_skb
tracepoint. And in this series patches, reasons for skb drops are added
to TCP layer (both TCPv4 and TCPv6 are considered).
Following functions are processed:

tcp_v4_rcv()
tcp_v6_rcv()
tcp_v4_inbound_md5_hash()
tcp_v6_inbound_md5_hash()
tcp_add_backlog()
tcp_v4_do_rcv()
tcp_v6_do_rcv()
tcp_rcv_established()
tcp_data_queue()
tcp_data_queue_ofo()

The functions we handled are mostly for packet ingress, as skb drops
hardly happens in the egress path of TCP layer. However, it's a little
complex for TCP state processing, as I find that it's hard to report skb
drop reasons to where it is freed. For example, when skb is dropped in
tcp_rcv_state_process(), the reason can be caused by the call of
tcp_v4_conn_request(), and it's hard to return a drop reason from
tcp_v4_conn_request(). So such cases are skipped  for this moment.

Following new drop reasons are introduced (what they mean can be see
in the document for them):

/* SKB_DROP_REASON_TCP_MD5* corresponding to LINUX_MIB_TCPMD5* */
SKB_DROP_REASON_TCP_MD5NOTFOUND
SKB_DROP_REASON_TCP_MD5UNEXPECTED
SKB_DROP_REASON_TCP_MD5FAILURE
SKB_DROP_REASON_SOCKET_BACKLOG
SKB_DROP_REASON_TCP_FLAGS
SKB_DROP_REASON_TCP_ZEROWINDOW
SKB_DROP_REASON_TCP_OLD_DATA
SKB_DROP_REASON_TCP_OVERWINDOW
/* corresponding to LINUX_MIB_TCPOFOMERGE */
SKB_DROP_REASON_TCP_OFOMERGE

Here is a example to get TCP packet drop reasons from ftrace:

$ echo 1 > /sys/kernel/debug/tracing/events/skb/kfree_skb/enable
$ cat /sys/kernel/debug/tracing/trace
$ <idle>-0       [036] ..s1.   647.428165: kfree_skb: skbaddr=000000004d037db6 protocol=2048 location=0000000074cd1243 reason: NO_SOCKET
$ <idle>-0       [020] ..s2.   639.676674: kfree_skb: skbaddr=00000000bcbfa42d protocol=2048 location=00000000bfe89d35 reason: PROTO_MEM

From the reason 'PROTO_MEM' we can know that the skb is dropped because
the memory configured in net.ipv4.tcp_mem is up to the limition.

Changes since v2:
- remove the 'inline' of tcp_drop() in the 1th patch, as Jakub
  suggested

Changes since v1:
- enrich the document for this series patches in the cover letter,
  as Eric suggested
- fix compile warning report by Jakub in the 6th patch
- let NO_SOCKET trump the XFRM failure in the 2th and 3th patches
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: tcp: use tcp_drop_reason() for tcp_data_queue_ofo()
Menglong Dong [Sun, 20 Feb 2022 07:06:37 +0000 (15:06 +0800)]
net: tcp: use tcp_drop_reason() for tcp_data_queue_ofo()

Replace tcp_drop() used in tcp_data_queue_ofo with tcp_drop_reason().
Following drop reasons are introduced:

SKB_DROP_REASON_TCP_OFOMERGE

Reviewed-by: Mengen Sun <mengensun@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: tcp: use tcp_drop_reason() for tcp_data_queue()
Menglong Dong [Sun, 20 Feb 2022 07:06:36 +0000 (15:06 +0800)]
net: tcp: use tcp_drop_reason() for tcp_data_queue()

Replace tcp_drop() used in tcp_data_queue() with tcp_drop_reason().
Following drop reasons are introduced:

SKB_DROP_REASON_TCP_ZEROWINDOW
SKB_DROP_REASON_TCP_OLD_DATA
SKB_DROP_REASON_TCP_OVERWINDOW

SKB_DROP_REASON_TCP_OLD_DATA is used for the case that end_seq of skb
less than the left edges of receive window. (Maybe there is a better
name?)

Reviewed-by: Mengen Sun <mengensun@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: tcp: use tcp_drop_reason() for tcp_rcv_established()
Menglong Dong [Sun, 20 Feb 2022 07:06:35 +0000 (15:06 +0800)]
net: tcp: use tcp_drop_reason() for tcp_rcv_established()

Replace tcp_drop() used in tcp_rcv_established() with tcp_drop_reason().
Following drop reasons are added:

SKB_DROP_REASON_TCP_FLAGS

Reviewed-by: Mengen Sun <mengensun@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: tcp: use kfree_skb_reason() for tcp_v{4,6}_do_rcv()
Menglong Dong [Sun, 20 Feb 2022 07:06:34 +0000 (15:06 +0800)]
net: tcp: use kfree_skb_reason() for tcp_v{4,6}_do_rcv()

Replace kfree_skb() used in tcp_v4_do_rcv() and tcp_v6_do_rcv() with
kfree_skb_reason().

Reviewed-by: Mengen Sun <mengensun@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: tcp: add skb drop reasons to tcp_add_backlog()
Menglong Dong [Sun, 20 Feb 2022 07:06:33 +0000 (15:06 +0800)]
net: tcp: add skb drop reasons to tcp_add_backlog()

Pass the address of drop_reason to tcp_add_backlog() to store the
reasons for skb drops when fails. Following drop reasons are
introduced:

SKB_DROP_REASON_SOCKET_BACKLOG

Reviewed-by: Mengen Sun <mengensun@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: tcp: add skb drop reasons to tcp_v{4,6}_inbound_md5_hash()
Menglong Dong [Sun, 20 Feb 2022 07:06:32 +0000 (15:06 +0800)]
net: tcp: add skb drop reasons to tcp_v{4,6}_inbound_md5_hash()

Pass the address of drop reason to tcp_v4_inbound_md5_hash() and
tcp_v6_inbound_md5_hash() to store the reasons for skb drops when this
function fails. Therefore, the drop reason can be passed to
kfree_skb_reason() when the skb needs to be freed.

Following drop reasons are added:

SKB_DROP_REASON_TCP_MD5NOTFOUND
SKB_DROP_REASON_TCP_MD5UNEXPECTED
SKB_DROP_REASON_TCP_MD5FAILURE

SKB_DROP_REASON_TCP_MD5* above correspond to LINUX_MIB_TCPMD5*

Reviewed-by: Mengen Sun <mengensun@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: tcp: use kfree_skb_reason() for tcp_v6_rcv()
Menglong Dong [Sun, 20 Feb 2022 07:06:31 +0000 (15:06 +0800)]
net: tcp: use kfree_skb_reason() for tcp_v6_rcv()

Replace kfree_skb() used in tcp_v6_rcv() with kfree_skb_reason().

Reviewed-by: Mengen Sun <mengensun@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: tcp: add skb drop reasons to tcp_v4_rcv()
Menglong Dong [Sun, 20 Feb 2022 07:06:30 +0000 (15:06 +0800)]
net: tcp: add skb drop reasons to tcp_v4_rcv()

Use kfree_skb_reason() for some path in tcp_v4_rcv() that missed before,
including:

SKB_DROP_REASON_SOCKET_FILTER
SKB_DROP_REASON_XFRM_POLICY

Reviewed-by: Mengen Sun <mengensun@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: tcp: introduce tcp_drop_reason()
Menglong Dong [Sun, 20 Feb 2022 07:06:29 +0000 (15:06 +0800)]
net: tcp: introduce tcp_drop_reason()

For TCP protocol, tcp_drop() is used to free the skb when it needs
to be dropped. To make use of kfree_skb_reason() and pass the drop
reason to it, introduce the function tcp_drop_reason(). Meanwhile,
make tcp_drop() an inline call to tcp_drop_reason().

Reviewed-by: Mengen Sun <mengensun@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: prestera: acl: fix 'client_map' buff overflow
Volodymyr Mytnyk [Fri, 18 Feb 2022 12:29:11 +0000 (14:29 +0200)]
net: prestera: acl: fix 'client_map' buff overflow

smatch warnings:
drivers/net/ethernet/marvell/prestera/prestera_acl.c:103
prestera_acl_chain_to_client() error: buffer overflow
'client_map' 3 <= 3

prestera_acl_chain_to_client(u32 chain_index, ...)
        ...
u32 client_map[] = {
PRESTERA_HW_COUNTER_CLIENT_LOOKUP_0,
PRESTERA_HW_COUNTER_CLIENT_LOOKUP_1,
PRESTERA_HW_COUNTER_CLIENT_LOOKUP_2
};
if (chain_index > ARRAY_SIZE(client_map))
...

Fixes: fa5d824ce5dd ("net: prestera: acl: add multi-chain support offload")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Volodymyr Mytnyk <vmytnyk@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: microchip: add ksz8563 to ksz9477 I2C driver
Ahmad Fatoum [Fri, 18 Feb 2022 13:15:40 +0000 (14:15 +0100)]
net: dsa: microchip: add ksz8563 to ksz9477 I2C driver

The KSZ9477 SPI driver already has support for the KSZ8563. The same switch
chip can also be managed via i2c and we have an KSZ9477 I2C driver, but
that one lacks the relevant compatible entry. Add it.

DT bindings already describe this compatible.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet/smc: unlock on error paths in __smc_setsockopt()
Dan Carpenter [Fri, 18 Feb 2022 15:32:59 +0000 (18:32 +0300)]
net/smc: unlock on error paths in __smc_setsockopt()

These two error paths need to release_sock(sk) before returning.

Fixes: a6a6fe27bab4 ("net/smc: Dynamic control handshake limitation by socket options")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: D. Wythe <alibuda@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: microchip: ksz9477: export HW stats over stats64 interface
Oleksij Rempel [Sat, 19 Feb 2022 08:26:30 +0000 (09:26 +0100)]
net: dsa: microchip: ksz9477: export HW stats over stats64 interface

Provide access to HW offloaded packets over stats64 interface.
The rx/tx_bytes values needed some fixing since HW is accounting size of
the Ethernet frame together with FCS.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'phylink-remove-pcs_poll'
David S. Miller [Sat, 19 Feb 2022 16:41:50 +0000 (16:41 +0000)]
Merge branch 'phylink-remove-pcs_poll'

Russell King says:

====================
net: phylink: remove pcs_poll

This small series removes the now unused pcs_poll members from DSA and
phylink. "git grep pcs_poll drivers/net/ net/" on net-next confirms that
the only places that reference this are in DSA core code and phylink
code:

drivers/net/phy/phylink.c:              if (pl->config->pcs_poll || pcs->poll)
drivers/net/phy/phylink.c:              poll |= pl->config->pcs_poll;
net/dsa/port.c: dp->pl_config.pcs_poll = ds->pcs_poll;
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: phylink: remove phylink_config's pcs_poll
Russell King (Oracle) [Sat, 19 Feb 2022 11:47:22 +0000 (11:47 +0000)]
net: phylink: remove phylink_config's pcs_poll

phylink_config's pcs_poll is no longer used, let's get rid of it.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: remove pcs_poll
Russell King (Oracle) [Sat, 19 Feb 2022 11:47:17 +0000 (11:47 +0000)]
net: dsa: remove pcs_poll

With drivers converted over to using phylink PCS, there is no need for
the struct dsa_switch member "pcs_poll" to exist anymore - there is a
flag in the struct phylink_pcs which indicates whether this PCS needs
to be polled which supersedes this.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: hsr: fix suspicious RCU usage warning in hsr_node_get_first()
Juhee Kang [Sat, 19 Feb 2022 15:29:59 +0000 (15:29 +0000)]
net: hsr: fix suspicious RCU usage warning in hsr_node_get_first()

When hsr_create_self_node() calls hsr_node_get_first(), the suspicious
RCU usage warning is occurred. The reason why this warning is raised is
the callers of hsr_node_get_first() use rcu_read_lock_bh() and
other different synchronization mechanisms. Thus, this patch solved by
replacing rcu_dereference() with rcu_dereference_bh_check().

The kernel test robot reports:
    [   50.083470][ T3596] =============================
    [   50.088648][ T3596] WARNING: suspicious RCU usage
    [   50.093785][ T3596] 5.17.0-rc3-next-20220208-syzkaller #0 Not tainted
    [   50.100669][ T3596] -----------------------------
    [   50.105513][ T3596] net/hsr/hsr_framereg.c:34 suspicious rcu_dereference_check() usage!
    [   50.113799][ T3596]
    [   50.113799][ T3596] other info that might help us debug this:
    [   50.113799][ T3596]
    [   50.124257][ T3596]
    [   50.124257][ T3596] rcu_scheduler_active = 2, debug_locks = 1
    [   50.132368][ T3596] 2 locks held by syz-executor.0/3596:
    [   50.137863][ T3596]  #0: ffffffff8d3357e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3be/0xb80
    [   50.147470][ T3596]  #1: ffff88807ec9d5f0 (&hsr->list_lock){+...}-{2:2}, at: hsr_create_self_node+0x225/0x650
    [   50.157623][ T3596]
    [   50.157623][ T3596] stack backtrace:
    [   50.163510][ T3596] CPU: 1 PID: 3596 Comm: syz-executor.0 Not tainted 5.17.0-rc3-next-20220208-syzkaller #0
    [   50.173381][ T3596] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
    [   50.183623][ T3596] Call Trace:
    [   50.186904][ T3596]  <TASK>
    [   50.189844][ T3596]  dump_stack_lvl+0xcd/0x134
    [   50.194640][ T3596]  hsr_node_get_first+0x9b/0xb0
    [   50.199499][ T3596]  hsr_create_self_node+0x22d/0x650
    [   50.204688][ T3596]  hsr_dev_finalize+0x2c1/0x7d0
    [   50.209669][ T3596]  hsr_newlink+0x315/0x730
    [   50.214113][ T3596]  ? hsr_dellink+0x130/0x130
    [   50.218789][ T3596]  ? rtnl_create_link+0x7e8/0xc00
    [   50.223803][ T3596]  ? hsr_dellink+0x130/0x130
    [   50.228397][ T3596]  __rtnl_newlink+0x107c/0x1760
    [   50.233249][ T3596]  ? rtnl_setlink+0x3c0/0x3c0
    [   50.238043][ T3596]  ? is_bpf_text_address+0x77/0x170
    [   50.243362][ T3596]  ? lock_downgrade+0x6e0/0x6e0
    [   50.248219][ T3596]  ? unwind_next_frame+0xee1/0x1ce0
    [   50.253605][ T3596]  ? entry_SYSCALL_64_after_hwframe+0x44/0xae
    [   50.259669][ T3596]  ? __sanitizer_cov_trace_cmp4+0x1c/0x70
    [   50.265423][ T3596]  ? is_bpf_text_address+0x99/0x170
    [   50.270819][ T3596]  ? kernel_text_address+0x39/0x80
    [   50.275950][ T3596]  ? __kernel_text_address+0x9/0x30
    [   50.281336][ T3596]  ? unwind_get_return_address+0x51/0x90
    [   50.286975][ T3596]  ? create_prof_cpu_mask+0x20/0x20
    [   50.292178][ T3596]  ? arch_stack_walk+0x93/0xe0
    [   50.297172][ T3596]  ? kmem_cache_alloc_trace+0x42/0x2c0
    [   50.302637][ T3596]  ? rcu_read_lock_sched_held+0x3a/0x70
    [   50.308194][ T3596]  rtnl_newlink+0x64/0xa0
    [   50.312524][ T3596]  ? __rtnl_newlink+0x1760/0x1760
    [   50.317545][ T3596]  rtnetlink_rcv_msg+0x413/0xb80
    [   50.322631][ T3596]  ? rtnl_newlink+0xa0/0xa0
    [   50.327159][ T3596]  netlink_rcv_skb+0x153/0x420
    [   50.331931][ T3596]  ? rtnl_newlink+0xa0/0xa0
    [   50.336436][ T3596]  ? netlink_ack+0xa80/0xa80
    [   50.341095][ T3596]  ? netlink_deliver_tap+0x1a2/0xc40
    [   50.346532][ T3596]  ? netlink_deliver_tap+0x1b1/0xc40
    [   50.351839][ T3596]  netlink_unicast+0x539/0x7e0
    [   50.356633][ T3596]  ? netlink_attachskb+0x880/0x880
    [   50.361750][ T3596]  ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70
    [   50.368003][ T3596]  ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70
    [   50.374707][ T3596]  ? __phys_addr_symbol+0x2c/0x70
    [   50.379753][ T3596]  ? __sanitizer_cov_trace_cmp8+0x1d/0x70
    [   50.385568][ T3596]  ? __check_object_size+0x16c/0x4f0
    [   50.390859][ T3596]  netlink_sendmsg+0x904/0xe00
    [   50.395715][ T3596]  ? netlink_unicast+0x7e0/0x7e0
    [   50.400722][ T3596]  ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70
    [   50.407003][ T3596]  ? netlink_unicast+0x7e0/0x7e0
    [   50.412119][ T3596]  sock_sendmsg+0xcf/0x120
    [   50.416548][ T3596]  __sys_sendto+0x21c/0x320
    [   50.421052][ T3596]  ? __ia32_sys_getpeername+0xb0/0xb0
    [   50.426427][ T3596]  ? lockdep_hardirqs_on_prepare+0x400/0x400
    [   50.432721][ T3596]  ? __context_tracking_exit+0xb8/0xe0
    [   50.438188][ T3596]  ? lock_downgrade+0x6e0/0x6e0
    [   50.443041][ T3596]  ? lock_downgrade+0x6e0/0x6e0
    [   50.447902][ T3596]  __x64_sys_sendto+0xdd/0x1b0
    [   50.452759][ T3596]  ? lockdep_hardirqs_on+0x79/0x100
    [   50.457964][ T3596]  ? syscall_enter_from_user_mode+0x21/0x70
    [   50.464150][ T3596]  do_syscall_64+0x35/0xb0
    [   50.468565][ T3596]  entry_SYSCALL_64_after_hwframe+0x44/0xae
    [   50.474452][ T3596] RIP: 0033:0x7f3148504e1c
    [   50.479052][ T3596] Code: fa fa ff ff 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 20 fb ff ff 48 8b
    [   50.498926][ T3596] RSP: 002b:00007ffeab5f2ab0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
    [   50.507342][ T3596] RAX: ffffffffffffffda RBX: 00007f314959d320 RCX: 00007f3148504e1c
    [   50.515393][ T3596] RDX: 0000000000000048 RSI: 00007f314959d370 RDI: 0000000000000003
    [   50.523444][ T3596] RBP: 0000000000000000 R08: 00007ffeab5f2b04 R09: 000000000000000c
    [   50.531492][ T3596] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
    [   50.539455][ T3596] R13: 00007f314959d370 R14: 0000000000000003 R15: 0000000000000000

Fixes: 4acc45db7115 ("net: hsr: use hlist_head instead of list_head for mac addresses")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Reported-and-tested-by: syzbot+f0eb4f3876de066b128c@syzkaller.appspotmail.com
Signed-off-by: Juhee Kang <claudiajkang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoatm: nicstar: Use kcalloc() to simplify code
Christophe JAILLET [Fri, 18 Feb 2022 17:46:51 +0000 (18:46 +0100)]
atm: nicstar: Use kcalloc() to simplify code

Use kcalloc() instead of kmalloc_array() and a loop to set all the values
of the array to NULL.

While at it, remove a duplicated assignment to 'scq->num_entries'.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'dpaa2-eth-one-step-register'
David S. Miller [Sat, 19 Feb 2022 16:27:17 +0000 (16:27 +0000)]
Merge branch 'dpaa2-eth-one-step-register'

Radu Bulie says:

====================
Provide direct access to 1588 one step register

DPAA2 MAC supports 1588 one step timestamping.
If this option is enabled then for each transmitted PTP event packet,
the 1588 SINGLE_STEP register is accessed to modify the following fields:

-offset of the correction field inside the PTP packet
-UDP checksum update bit,  in case the PTP event packet has
 UDP encapsulation

These values can change any time, because there may be multiple
PTP clients connected, that receive various 1588 frame types:
- L2 only frame
- UDP / Ipv4
- UDP / Ipv6
- other

The current implementation uses dpni_set_single_step_cfg to update the
SINLGE_STEP register.
Using an MC command  on the Tx datapath for each transmitted 1588 message
introduces high delays, leading to low throughput and consequently to a
small number of supported PTP clients. Besides these, the nanosecond
correction field from the PTP packet will contain the high delay from the
driver which together with the originTimestamp will render timestamp
values that are unacceptable in a GM clock implementation.

This patch series replaces the dpni_set_single_step_cfg function call from
the Tx datapath for 1588 messages (when one step timestamping is enabled)
with a callback that either implements direct access to the SINGLE_STEP
register, eliminating the overhead caused by the MC command that will need
to be dispatched by the MC firmware through the MC command portal
interface or falls back to the dpni_set_single_step_cfg in case the MC
version does not have support for returning the single step register
base address.

In other words all the delay introduced by dpni_set_single_step_cfg
function will be eliminated (if MC version has support for returning the
base address of the single step register), improving the egress driver
performance for PTP packets when single step timestamping is enabled.

The first patch adds a new attribute that contains the base address of
the SINGLE_STEP register. It will be used to directly update the register
on the Tx datapath.

The second patch updates the driver such that the SINGLE_STEP
register is either accessed directly if MC version >= 10.32 or is
accessed through dpni_set_single_step_cfg command when 1588 messages
are transmitted.

Changes in v2:
 - move global function pointer into the driver's private structure in 2/2
 - move repetitive code outside the body of the callback functions  in 2/2
 - update function dpaa2_ptp_onestep_reg_update_method  and remove goto
   statement from non error path in 2/2

Changes in v3:
 - remove static storage class specifier from within the structure in 2/2
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agodpaa2-eth: Update SINGLE_STEP register access
Radu Bulie [Fri, 18 Feb 2022 20:22:01 +0000 (22:22 +0200)]
dpaa2-eth: Update SINGLE_STEP register access

DPAA2 MAC supports 1588 one step timestamping.
If this option is enabled then for each transmitted PTP event packet,
the 1588 SINGLE_STEP register is accessed to modify the following fields:

-offset of the correction field inside the PTP packet
-UDP checksum update bit,  in case the PTP event packet has
 UDP encapsulation

These values can change any time, because there may be multiple
PTP clients connected, that receive various 1588 frame types:
- L2 only frame
- UDP / Ipv4
- UDP / Ipv6
- other

The current implementation uses dpni_set_single_step_cfg to update the
SINLGE_STEP register.
Using an MC command  on the Tx datapath for each transmitted 1588 message
introduces high delays, leading to low throughput and consequently to a
small number of supported PTP clients. Besides these, the nanosecond
correction field from the PTP packet will contain the high delay from the
driver which together with the originTimestamp will render timestamp
values that are unacceptable in a GM clock implementation.

This patch updates the Tx datapath for 1588 messages when single step
timestamp is enabled and provides direct access to SINGLE_STEP register,
eliminating the  overhead caused by the dpni_set_single_step_cfg
MC command. MC version >= 10.32 implements this functionality.
If the MC version does not have support for returning the
single step register base address, the driver will use
dpni_set_single_step_cfg command for updates operations.

All the delay introduced by dpni_set_single_step_cfg
function will be eliminated (if MC version has support for returning the
base address of the single step register), improving the egress driver
performance for PTP packets when single step timestamping is enabled.

Before these changes the maximum throughput for 1588 messages with
single step hardware timestamp enabled was around 2000pps.
After the updates the throughput increased up to 32.82 Mbps / 46631.02 pps.

Signed-off-by: Radu Bulie <radu-andrei.bulie@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agodpaa2-eth: Update dpni_get_single_step_cfg command
Radu Bulie [Fri, 18 Feb 2022 20:22:00 +0000 (22:22 +0200)]
dpaa2-eth: Update dpni_get_single_step_cfg command

dpni_get_single_step_cfg is an MC firmware command used for
retrieving the contents of SINGLE_STEP 1588 register available
in a DPMAC.

This patch adds a new version of this command that returns as an extra
argument the physical base address of the aforementioned register.
The address will be used to directly modify the contents of the
SINGLE_STEP register instead of invoking the MC command
dpni_set_single_step_cgf. The former approach introduced huge delays on
the TX datapath when one step PTP events were transmitted. This led to low
throughput and high latencies observed in the PTP correction field.

Signed-off-by: Radu Bulie <radu-andrei.bulie@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: get rid of rtnl_lock_unregistering()
Eric Dumazet [Fri, 18 Feb 2022 17:58:56 +0000 (09:58 -0800)]
net: get rid of rtnl_lock_unregistering()

After recent patches, and in particular commits
 faab39f63c1f ("net: allow out-of-order netdev unregistration") and
 e5f80fcf869a ("ipv6: give an IPv6 dev to blackhole_netdev")
we no longer need the barrier implemented in rtnl_lock_unregistering().

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: prestera: flower: fix destroy tmpl in chain
Volodymyr Mytnyk [Fri, 18 Feb 2022 09:39:49 +0000 (11:39 +0200)]
net: prestera: flower: fix destroy tmpl in chain

Fix flower destroy template callback to release template
only for specific tc chain instead of all chain tempaltes.

The issue was intruduced by previous commit that introduced
multi-chain support.

Fixes: fa5d824ce5dd ("net: prestera: acl: add multi-chain support offload")
Signed-off-by: Volodymyr Mytnyk <vmytnyk@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agobridge: switch br_net_exit to batch mode
Eric Dumazet [Fri, 18 Feb 2022 07:01:50 +0000 (23:01 -0800)]
bridge: switch br_net_exit to batch mode

cleanup_net() is competing with other rtnl users.

Instead of calling br_net_exit() for each netns,
call br_net_exit_batch() once.

This gives cleanup_net() ability to group more devices
and call unregister_netdevice_many() only once for all bridge devices.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Roopa Prabhu <roopa@nvidia.com>
Cc: Nikolay Aleksandrov <razor@blackwall.org>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'mctp-i2c'
David S. Miller [Sat, 19 Feb 2022 16:18:50 +0000 (16:18 +0000)]
Merge branch 'mctp-i2c'

Matt Johnston says:

====================
MCTP I2C driver

This patch series adds a netdev driver providing MCTP transport over
I2C.

I think I've addressed all the points raised in v5. It now has
mctp_i2c_unregister() to run things in the correct order, waiting for
the worker thread and I2C rx to complete.

Cheers,
Matt

--

v6:
 - Changed netdev register/unregister/free to avoid races. Ensure that
   netif functions are not used by irq handler/threads after unregister.
 - Fix incoming I2C hwaddr that was previously incorrect (left
   shifted 1 bit)
 - Add a check that byte_count wire header matches the length received
 - Renamed I2C driver to mctp-i2c-interface
 - Removed __func__ from print messages, added missing newlines
 - Removed sysfs mctp_current_mux file which was used for debug
 - Renamed curr_lock to sel_lock
 - Tidied comment formatting
 - Fix newline in Kconfig
v5:
 - Fix incorrect format string
v4:
 - Switch to __i2c_transfer() rather than __i2c_smbus_xfer(), drop 255 byte
   smbus patches
 - Use wait_event_idle() for the sleeping TX thread
 - Use dev_addr_set()
v3:
 - Added Reviewed-bys for npcm7xx
 - Resend with net-next open
v2:
 - Simpler Kconfig condition for i2c-mux dependency, from Randy Dunlap
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomctp i2c: MCTP I2C binding driver
Matt Johnston [Fri, 18 Feb 2022 05:51:06 +0000 (13:51 +0800)]
mctp i2c: MCTP I2C binding driver

Provides MCTP network transport over an I2C bus, as specified in
DMTF DSP0237. All messages between nodes are sent as SMBus Block Writes.

Each I2C bus to be used for MCTP is flagged in devicetree by a
'mctp-controller' property on the bus node. Each flagged bus gets a
mctpi2cX net device created based on the bus number. A
'mctp-i2c-controller' I2C client needs to be added under the adapter. In
an I2C mux situation the mctp-i2c-controller node must be attached only
to the root I2C bus. The I2C client will handle incoming I2C slave block
write data for subordinate busses as well as its own bus.

In configurations without devicetree a driver instance can be attached
to a bus using the I2C slave new_device mechanism.

The MCTP core will hold/release the MCTP I2C device while responses
are pending (a 6 second timeout or once a socket is closed, response
received etc). While held the MCTP I2C driver will lock the I2C bus so
that the correct I2C mux remains selected while responses are received.

(Ideally we would just lock the mux to keep the current bus selected for
the response rather than a full I2C bus lock, but that isn't exposed in
the I2C mux API)

Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Reviewed-by: Wolfram Sang <wsa@kernel.org> # I2C transport parts
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agodt-bindings: net: New binding mctp-i2c-controller
Matt Johnston [Fri, 18 Feb 2022 05:51:05 +0000 (13:51 +0800)]
dt-bindings: net: New binding mctp-i2c-controller

Used to define a local endpoint to communicate with MCTP peripherals
attached to an I2C bus. This I2C endpoint can communicate with remote
MCTP devices on the I2C bus.

In the example I2C topology below (matching the second yaml example) we
have MCTP devices on busses i2c1 and i2c6. MCTP-supporting busses are
indicated by the 'mctp-controller' DT property on an I2C bus node.

A mctp-i2c-controller I2C client DT node is placed at the top of the
mux topology, since only the root I2C adapter will support I2C slave
functionality.
                                               .-------.
                                               |eeprom |
    .------------.     .------.               /'-------'
    | adapter    |     | mux  --@0,i2c5------'
    | i2c1       ----.*|      --@1,i2c6--.--.
    |............|    \'------'           \  \  .........
    | mctp-i2c-  |     \                   \  \ .mctpB  .
    | controller |      \                   \  '.0x30   .
    |            |       \  .........        \  '.......'
    | 0x50       |        \ .mctpA  .         \ .........
    '------------'         '.0x1d   .          '.mctpC  .
                            '.......'          '.0x31   .
                                                '.......'
(mctpX boxes above are remote MCTP devices not included in the DT at
present, they can be hotplugged/probed at runtime. A DT binding for
specific fixed MCTP devices could be added later if required)

Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ip6mr: add support for passing full packet on wrong mif
Mobashshera Rasool [Thu, 17 Feb 2022 07:46:40 +0000 (07:46 +0000)]
net: ip6mr: add support for passing full packet on wrong mif

This patch adds support for MRT6MSG_WRMIFWHOLE which is used to pass
full packet and real vif id when the incoming interface is wrong.
While the RP and FHR are setting up state we need to be sending the
registers encapsulated with all the data inside otherwise we lose it.
The RP then decapsulates it and forwards it to the interested parties.
Currently with WRONGMIF we can only be sending empty register packets
and will lose that data.
This behaviour can be enabled by using MRT_PIM with
val == MRT6MSG_WRMIFWHOLE. This doesn't prevent MRT6MSG_WRONGMIF from
happening, it happens in addition to it, also it is controlled by the same
throttling parameters as WRONGMIF (i.e. 1 packet per 3 seconds currently).
Both messages are generated to keep backwards compatibily and avoid
breaking someone who was enabling MRT_PIM with val == 4, since any
positive val is accepted and treated the same.

Signed-off-by: Mobashshera Rasool <mobash.rasool.linux@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoi40e: remove dead stores on XSK hotpath
Alexander Lobakin [Fri, 18 Feb 2022 21:50:33 +0000 (13:50 -0800)]
i40e: remove dead stores on XSK hotpath

The 'if (ntu == rx_ring->count)' block in i40e_alloc_rx_buffers_zc()
was previously residing in the loop, but after introducing the
batched interface it is used only to wrap-around the NTU descriptor,
thus no more need to assign 'xdp'.

'cleaned_count' in i40e_clean_rx_irq_zc() was previously being
incremented in the loop, but after commit f12738b6ec06
("i40e: remove unnecessary cleaned_count updates") it gets
assigned only once after it, so the initialization can be dropped.

Fixes: 6aab0bb0c5cd ("i40e: Use the xsk batched rx allocation interface")
Fixes: f12738b6ec06 ("i40e: remove unnecessary cleaned_count updates")
Signed-off-by: Alexander Lobakin <alexandr.lobakin@intel.com>
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Tested-by: George Kuruvinakunnel <george.kuruvinakunnel@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'add-checks-for-incoming-packet-addresses'
Jakub Kicinski [Sat, 19 Feb 2022 05:24:32 +0000 (21:24 -0800)]
Merge branch 'add-checks-for-incoming-packet-addresses'

Jeremy Kerr says:

====================
Add checks for incoming packet addresses

This series adds a couple of checks for valid addresses on incoming MCTP
packets. We introduce a couple of helpers in 1/2, and use them in the
ingress path in 2/2.
====================

Link: https://lore.kernel.org/r/20220218042554.564787-1-jk@codeconstruct.com.au
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agomctp: add address validity checking for packet receive
Jeremy Kerr [Fri, 18 Feb 2022 04:25:54 +0000 (12:25 +0800)]
mctp: add address validity checking for packet receive

This change adds some basic sanity checks for the source and dest
headers of packets on initial receive.

Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agomctp: replace mctp_address_ok with more fine-grained helpers
Jeremy Kerr [Fri, 18 Feb 2022 04:25:53 +0000 (12:25 +0800)]
mctp: replace mctp_address_ok with more fine-grained helpers

Currently, we have mctp_address_ok(), which checks if an EID is in the
"valid" range of 8-254 inclusive. However, 0 and 255 may also be valid
addresses, depending on context. 0 is the NULL EID, which may be set
when physical addressing is used. 255 is valid as a destination address
for broadcasts.

This change renames mctp_address_ok to mctp_address_unicast, and adds
similar helpers for broadcast and null EIDs, which will be used in an
upcoming commit.

Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: Add new protocol attribute to IP addresses
Jacques de Laval [Thu, 17 Feb 2022 15:02:02 +0000 (16:02 +0100)]
net: Add new protocol attribute to IP addresses

This patch adds a new protocol attribute to IPv4 and IPv6 addresses.
Inspiration was taken from the protocol attribute of routes. User space
applications like iproute2 can set/get the protocol with the Netlink API.

The attribute is stored as an 8-bit unsigned integer.

The protocol attribute is set by kernel for these categories:

- IPv4 and IPv6 loopback addresses
- IPv6 addresses generated from router announcements
- IPv6 link local addresses

User space may pass custom protocols, not defined by the kernel.

Grouping addresses on their origin is useful in scenarios where you want
to distinguish between addresses based on who added them, e.g. kernel
vs. user space.

Tagging addresses with a string label is an existing feature that could be
used as a solution. Unfortunately the max length of a label is
15 characters, and for compatibility reasons the label must be prefixed
with the name of the device followed by a colon. Since device names also
have a max length of 15 characters, only -1 characters is guaranteed to be
available for any origin tag, which is not that much.

A reference implementation of user space setting and getting protocols
is available for iproute2:

https://github.com/westermo/iproute2/commit/9a6ea18bd79f47f293e5edc7780f315ea42ff540

Signed-off-by: Jacques de Laval <Jacques.De.Laval@westermo.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20220217150202.80802-1-Jacques.De.Laval@westermo.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge branch 'ionic-driver-updates'
Jakub Kicinski [Sat, 19 Feb 2022 04:37:17 +0000 (20:37 -0800)]
Merge branch 'ionic-driver-updates'

Shannon Nelson says:

====================
ionic: driver updates

These are a couple of checkpatch cleanup patches, a bug fix,
and something to alleviate memory pressure in tight places.
====================

Link: https://lore.kernel.org/r/20220217220252.52293-1-snelson@pensando.io
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoionic: clean up comments and whitespace
Shannon Nelson [Thu, 17 Feb 2022 22:02:52 +0000 (14:02 -0800)]
ionic: clean up comments and whitespace

Fix up some checkpatch complaints that have crept in:
doubled words words, mispellled words, doubled lines.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoionic: prefer strscpy over strlcpy
Shannon Nelson [Thu, 17 Feb 2022 22:02:51 +0000 (14:02 -0800)]
ionic: prefer strscpy over strlcpy

Replace strlcpy with strscpy to clean up a checkpatch complaint.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoionic: Use vzalloc for large per-queue related buffers
Brett Creeley [Thu, 17 Feb 2022 22:02:50 +0000 (14:02 -0800)]
ionic: Use vzalloc for large per-queue related buffers

Use vzalloc for per-queue info structs that don't need any
DMA mapping to help relieve memory pressure found when used
in our limited SOC environment.

Signed-off-by: Brett Creeley <brett@pensando.io>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>