platform/kernel/linux-starfive.git
2 years agoref_tracker: add a count of untracked references
Eric Dumazet [Fri, 4 Feb 2022 22:42:36 +0000 (14:42 -0800)]
ref_tracker: add a count of untracked references

We are still chasing a netdev refcount imbalance, and we suspect
we have one rogue dev_put() that is consuming a reference taken
from a dev_hold_track()

To detect this case, allow ref_tracker_alloc() and ref_tracker_free()
to be called with a NULL @trackerp parameter, and use a dedicated
refcount_t just for them.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoref_tracker: implement use-after-free detection
Eric Dumazet [Fri, 4 Feb 2022 22:42:35 +0000 (14:42 -0800)]
ref_tracker: implement use-after-free detection

Whenever ref_tracker_dir_init() is called, mark the struct ref_tracker_dir
as dead.

Test the dead status from ref_tracker_alloc() and ref_tracker_free()

This should detect buggy dev_put()/dev_hold() happening too late
in netdevice dismantle process.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'ipv6-mc_forwarding-changes'
David S. Miller [Sat, 5 Feb 2022 15:20:35 +0000 (15:20 +0000)]
Merge branch 'ipv6-mc_forwarding-changes'

Eric Dumazet says:

====================
ipv6: mc_forwarding changes

First patch removes minor data-races, as mc_forwarding can
be locklessly read in fast path.

Second patch adds a short cut in ip6mr_sk_done()
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoip6mr: ip6mr_sk_done() can exit early in common cases
Eric Dumazet [Fri, 4 Feb 2022 20:15:46 +0000 (12:15 -0800)]
ip6mr: ip6mr_sk_done() can exit early in common cases

In many cases, ip6mr_sk_done() is called while no ipmr socket
has been registered.

This removes 4 rtnl acquisitions per netns dismantle,
with following callers:

igmp6_net_exit(), tcpv6_net_exit(), ndisc_net_exit()

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoipv6: make mc_forwarding atomic
Eric Dumazet [Fri, 4 Feb 2022 20:15:45 +0000 (12:15 -0800)]
ipv6: make mc_forwarding atomic

This fixes minor data-races in ip6_mc_input() and
batadv_mcast_mla_rtr_flags_softif_get_ipv6()

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: realtek: don't default Kconfigs to y
Jakub Kicinski [Fri, 4 Feb 2022 15:59:27 +0000 (07:59 -0800)]
net: dsa: realtek: don't default Kconfigs to y

We generally default the vendor to y and the drivers itself
to n. NET_DSA_REALTEK, however, selects a whole bunch of things,
so it's not a pure "vendor selection" knob. Let's default it all
to n.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: sparx5: remove phylink_config.pcs_poll usage
Russell King (Oracle) [Fri, 4 Feb 2022 11:47:53 +0000 (11:47 +0000)]
net: sparx5: remove phylink_config.pcs_poll usage

Phylink will use PCS polling whenever phylink_config.pcs_poll or the
phylink_pcs poll member is set. As this driver sets both, remove the
former.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: phylink: remove phylink_set_10g_modes()
Russell King (Oracle) [Fri, 4 Feb 2022 11:42:10 +0000 (11:42 +0000)]
net: phylink: remove phylink_set_10g_modes()

phylink_set_10g_modes() is no longer used with the conversion of
drivers to phylink_generic_validate(), so we can remove it.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'gro-minor-opts'
David S. Miller [Sat, 5 Feb 2022 15:13:52 +0000 (15:13 +0000)]
Merge branch 'gro-minor-opts'

Paolo Abeni says:

====================
gro: a couple of minor optimization

This series collects a couple of small optimizations for the GRO engine,
reducing slightly the number of cycles for dev_gro_receive().
The delta is within noise range in tput tests, but with big TCP coming
every cycle saved from the GRO engine will count - I hope ;)

v1 -> v2:
 - a few cleanup suggested from Alexander(s)
 - moved away the more controversial 3rd patch
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: gro: minor optimization for dev_gro_receive()
Paolo Abeni [Fri, 4 Feb 2022 11:28:37 +0000 (12:28 +0100)]
net: gro: minor optimization for dev_gro_receive()

While inspecting some perf report, I noticed that the compiler
emits suboptimal code for the napi CB initialization, fetching
and storing multiple times the memory for flags bitfield.
This is with gcc 10.3.1, but I observed the same with older compiler
versions.

We can help the compiler to do a nicer work clearing several
fields at once using an u32 alias. The generated code is quite
smaller, with the same number of conditional.

Before:
objdump -t net/core/gro.o | grep " F .text"
0000000000000bb0 l     F .text 0000000000000357 dev_gro_receive

After:
0000000000000bb0 l     F .text 000000000000033c dev_gro_receive

v1  -> v2:
 - use struct_group (Alexander and Alex)

RFC -> v1:
 - use __struct_group to delimit the zeroed area (Alexander)

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: gro: avoid re-computing truesize twice on recycle
Paolo Abeni [Fri, 4 Feb 2022 11:28:36 +0000 (12:28 +0100)]
net: gro: avoid re-computing truesize twice on recycle

After commit 5e10da5385d2 ("skbuff: allow 'slow_gro' for skb
carring sock reference") and commit af352460b465 ("net: fix GRO
skb truesize update") the truesize of the skb with stolen head is
properly updated by the GRO engine, we don't need anymore resetting
it at recycle time.

v1 -> v2:
 - clarify the commit message (Alexander)

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: qca8k: check correct variable in qca8k_phy_eth_command()
Dan Carpenter [Fri, 4 Feb 2022 10:03:36 +0000 (13:03 +0300)]
net: dsa: qca8k: check correct variable in qca8k_phy_eth_command()

This is a copy and paste bug.  It was supposed to check "clear_skb"
instead of "write_skb".

Fixes: 2cd548566384 ("net: dsa: qca8k: add support for phy read/write with mgmt Ethernet")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'lan966x-mcast-snooping'
David S. Miller [Sat, 5 Feb 2022 15:00:43 +0000 (15:00 +0000)]
Merge branch 'lan966x-mcast-snooping'

Horatiu Vultur says:

====================
net: lan966x: add support for mcast snooping

Implement the switchdev callback SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED
to allow to enable/disable multicast snooping.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: lan966x: Update mdb when enabling/disabling mcast_snooping
Horatiu Vultur [Fri, 4 Feb 2022 09:14:52 +0000 (10:14 +0100)]
net: lan966x: Update mdb when enabling/disabling mcast_snooping

When the multicast snooping is disabled, the mdb entries should be
removed from the HW, but they still need to be kept in memory for when
the mcast_snooping will be enabled again.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: lan966x: Implement the callback SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED
Horatiu Vultur [Fri, 4 Feb 2022 09:14:51 +0000 (10:14 +0100)]
net: lan966x: Implement the callback SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED

The callback allows to enable/disable multicast snooping.
When the snooping is enabled, all IGMP and MLD frames are redirected to
the CPU, therefore make sure not to set the skb flag 'offload_fwd_mark'.
The HW will not flood multicast ipv4/ipv6 data frames.
When the snooping is disabled, the HW will flood IGMP, MLD and multicast
ipv4/ipv6 frames according to the mcast_flood flag.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: lan966x: Update the PGID used by IPV6 data frames
Horatiu Vultur [Fri, 4 Feb 2022 09:14:50 +0000 (10:14 +0100)]
net: lan966x: Update the PGID used by IPV6 data frames

When enabling the multicast snooping, the forwarding of the IPV6 frames
has it's own forwarding mask.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet/sched: Enable tc skb ext allocation on chain miss only when needed
Paul Blakey [Thu, 3 Feb 2022 08:44:30 +0000 (10:44 +0200)]
net/sched: Enable tc skb ext allocation on chain miss only when needed

Currently tc skb extension is used to send miss info from
tc to ovs datapath module, and driver to tc. For the tc to ovs
miss it is currently always allocated even if it will not
be used by ovs datapath (as it depends on a requested feature).

Export the static key which is used by openvswitch module to
guard this code path as well, so it will be skipped if ovs
datapath doesn't need it. Enable this code path once
ovs datapath needs it.

Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'mptcp-improve-set-flags-command-and-update-self-tests'
Jakub Kicinski [Sat, 5 Feb 2022 04:30:26 +0000 (20:30 -0800)]
Merge branch 'mptcp-improve-set-flags-command-and-update-self-tests'

Mat Martineau says:

====================
mptcp: Improve set-flags command and update self tests

Patches 1-3 allow more flexibility in the combinations of features and
flags allowed with the MPTCP_PM_CMD_SET_FLAGS netlink command, and add
self test case coverage for the new functionality.

Patches 4-6 and 9 refactor the mptcp_join.sh self tests to allow them to
configure all of the test cases using either the pm_nl_ctl utility (part
of the mptcp self tests) or the 'ip mptcp' command (from iproute2). The
default remains to use pm_nl_ctl.

Patches 7 and 8 update the pm_netlink.sh self tests to cover the use of
endpoint ids to set endpoint flags (instead of just addresses).
====================

Link: https://lore.kernel.org/r/20220205000337.187292-1-mathew.j.martineau@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: set ip_mptcp in command line
Geliang Tang [Sat, 5 Feb 2022 00:03:37 +0000 (16:03 -0800)]
selftests: mptcp: set ip_mptcp in command line

This patch added a command line option '-i' for mptcp_join.sh to use
'ip mptcp' commands instead of using 'pm_nl_ctl' commands to deal with
PM netlink.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: add set_flags tests in pm_netlink.sh
Geliang Tang [Sat, 5 Feb 2022 00:03:36 +0000 (16:03 -0800)]
selftests: mptcp: add set_flags tests in pm_netlink.sh

This patch added the setting flags test cases, using both addr-based and
id-based lookups for the setting address.

The output looks like this:

 set flags (backup)                                 [ OK ]
           (nobackup)                               [ OK ]
           (fullmesh)                               [ OK ]
           (nofullmesh)                             [ OK ]
           (backup,fullmesh)                        [ OK ]

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: add the id argument for set_flags
Geliang Tang [Sat, 5 Feb 2022 00:03:35 +0000 (16:03 -0800)]
selftests: mptcp: add the id argument for set_flags

This patch added the id argument for setting the address flags in
pm_nl_ctl.

Usage:

    pm_nl_ctl set id 1 flags backup

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: add wrapper for setting flags
Geliang Tang [Sat, 5 Feb 2022 00:03:34 +0000 (16:03 -0800)]
selftests: mptcp: add wrapper for setting flags

This patch implemented a new function named pm_nl_set_endpoint(), wrapped
the PM netlink commands 'ip mptcp endpoint change flags' and 'pm_nl_ctl
set flags' in it, and used a new argument 'ip_mptcp' to choose which one
to use to set the flags of the PM endpoint.

'ip mptcp' used the ID number argument to find out the address to change
flags, while 'pm_nl_ctl' used the address and port number arguments. So
we need to parse the address ID from the PM dump output as well as the
address and port number.

Used this wrapper in do_transfer() instead of using the pm_nl_ctl command
directly.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: add wrapper for showing addrs
Geliang Tang [Sat, 5 Feb 2022 00:03:33 +0000 (16:03 -0800)]
selftests: mptcp: add wrapper for showing addrs

This patch implemented a new function named pm_nl_show_endpoints(), wrapped
the PM netlink commands 'ip mptcp endpoint show' and 'pm_nl_ctl dump' in
it, used a new argument 'ip_mptcp' to choose which one to use to show all
the PM endpoints.

Used this wrapper in do_transfer() instead of using the pm_nl_ctl commands
directly.

The original 'pos+=5' in the remoing tests only works for the output of
'pm_nl_ctl show':

  id 1 flags subflow 10.0.1.1

It doesn't work for the output of 'ip mptcp endpoint show':

  10.0.1.1 id 1 subflow

So implemented a more flexible approach to get the address ID from the PM
dump output to fit for both commands.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: add ip mptcp wrappers
Geliang Tang [Sat, 5 Feb 2022 00:03:32 +0000 (16:03 -0800)]
selftests: mptcp: add ip mptcp wrappers

This patch added four basic 'ip mptcp' wrappers:

pm_nl_set_limits()
pm_nl_add_endpoint()
pm_nl_del_endpoint()
pm_nl_flush_endpoint().

Wrapped the PM netlink commands 'ip mptcp' and 'pm_nl_ctl' in them, and
used a new argument 'ip_mptcp' to choose which one to use for setting the
PM limits, adding or deleting the PM endpoint.

Used the wrappers in all the selftests in mptcp_join.sh instead of using
the pm_nl_ctl commands directly.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: add backup with port testcase
Geliang Tang [Sat, 5 Feb 2022 00:03:31 +0000 (16:03 -0800)]
selftests: mptcp: add backup with port testcase

This patch added the backup testcase using an address with a port number.

The original backup tests only work for the output of 'pm_nl_ctl dump'
without the port number. It chooses the last item in the dump to parse
the address in it, and in this case, the address is showed at the end
of the item.

But it doesn't work for the dump with the port number, in this case, the
port number is showed at the end of the item, not the address.

So implemented a more flexible approach to get the address and the port
number from the dump to fit for the port number case.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: mptcp: add the port argument for set_flags
Geliang Tang [Sat, 5 Feb 2022 00:03:30 +0000 (16:03 -0800)]
selftests: mptcp: add the port argument for set_flags

This patch added the port argument for setting the address flags in
pm_nl_ctl.

Usage:

    pm_nl_ctl set 10.0.2.1 flags backup port 10100

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agomptcp: allow to use port and non-signal in set_flags
Geliang Tang [Sat, 5 Feb 2022 00:03:29 +0000 (16:03 -0800)]
mptcp: allow to use port and non-signal in set_flags

It's illegal to use both port and non-signal flags for adding address.
But it's legal to use both of them for setting flags, which always uses
non-signal flags, backup or fullmesh.

This patch moves this non-signal flag with port check from
mptcp_pm_parse_addr() to mptcp_nl_cmd_add_addr(). Do the check only when
adding addresses, not setting flags or deleting addresses.

Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge branch 'support-for-the-ioam-insertion-frequency'
Jakub Kicinski [Sat, 5 Feb 2022 04:24:47 +0000 (20:24 -0800)]
Merge branch 'support-for-the-ioam-insertion-frequency'

Justin Iurman says:

====================
Support for the IOAM insertion frequency

The insertion frequency is represented as "k/n", meaning IOAM will be
added to {k} packets over {n} packets, with 0 < k <= n and 1 <= {k,n} <=
1000000. Therefore, it provides the following percentages of insertion
frequency: [0.0001% (min) ... 100% (max)].

Not only this solution allows an operator to apply dynamic frequencies
based on the current traffic load, but it also provides some
flexibility, i.e., by distinguishing similar cases (e.g., "1/2" and
"2/4").

"1/2" = Y N Y N Y N Y N ...
"2/4" = Y Y N N Y Y N N ...
====================

Link: https://lore.kernel.org/r/20220202142554.9691-1-justin.iurman@uliege.be
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoipv6: ioam: Insertion frequency in lwtunnel output
Justin Iurman [Wed, 2 Feb 2022 14:25:54 +0000 (15:25 +0100)]
ipv6: ioam: Insertion frequency in lwtunnel output

Add support for the IOAM insertion frequency inside its lwtunnel output
function. This patch introduces a new (atomic) counter for packets,
based on which the algorithm will decide if IOAM should be added or not.

Default frequency is "1/1" (i.e., applied to all packets) for backward
compatibility. The iproute2 patch is ready and will be submitted as soon
as this one is accepted.

Previous iproute2 command:
ip -6 ro ad fc00::1/128 encap ioam6 [ mode ... ] ...

New iproute2 command:
ip -6 ro ad fc00::1/128 encap ioam6 [ freq k/n ] [ mode ... ] ...

Signed-off-by: Justin Iurman <justin.iurman@uliege.be>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agouapi: ioam: Insertion frequency
Justin Iurman [Wed, 2 Feb 2022 14:25:53 +0000 (15:25 +0100)]
uapi: ioam: Insertion frequency

Add the insertion frequency uapi for IOAM lwtunnels.

Signed-off-by: Justin Iurman <justin.iurman@uliege.be>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: don't include ndisc.h from ipv6.h
Jakub Kicinski [Thu, 3 Feb 2022 23:12:40 +0000 (15:12 -0800)]
net: don't include ndisc.h from ipv6.h

Nothing in ipv6.h needs ndisc.h, drop it.

Link: https://lore.kernel.org/r/20220203043457.2222388-1-kuba@kernel.org
Acked-by: Jeremy Kerr <jk@codeconstruct.com.au>
Acked-by: Stefan Schmidt <stefan@datenfreihafen.org>
Link: https://lore.kernel.org/r/20220203231240.2297588-1-kuba@kernel.org
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge branch 'ipa-RX-replenish'
David S. Miller [Fri, 4 Feb 2022 10:16:09 +0000 (10:16 +0000)]
Merge branch 'ipa-RX-replenish'

Alex Elder says:

====================
net: ipa: improve RX buffer replenishing

This series revises the algorithm used for replenishing receive
buffers on RX endpoints.  Currently there are two atomic variables
that track how many receive buffers can be sent to the hardware.
The new algorithm obviates the need for those, by just assuming we
always want to provide the hardware with buffers until it can hold
no more.

The first patch eliminates an atomic variable that's not required.
The next moves some code into the main replenish function's caller,
making one of the called function's arguments unnecessary.   The
next six refactor things a bit more, adding a new helper function
that allows us to eliminate an additional atomic variable.  And the
final two implement two more minor improvements.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ipa: determine replenish doorbell differently
Alex Elder [Thu, 3 Feb 2022 17:09:27 +0000 (11:09 -0600)]
net: ipa: determine replenish doorbell differently

Rather than tracking the number of receive buffer transactions that
have been submitted without a doorbell, just track the total number
of transactions that have been issued.  Then ring the doorbell when
that number modulo the replenish batch size is 0.

The effect is roughly the same, but the new count is slightly more
interesting, and this approach will someday allow the replenish
batch size to be tuned at runtime.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ipa: replenish after delivering payload
Alex Elder [Thu, 3 Feb 2022 17:09:26 +0000 (11:09 -0600)]
net: ipa: replenish after delivering payload

Replenishing is now solely driven by whether transactions are
available for a channel, and it doesn't really matter whether
we replenish before or after we deliver received packets to the
network stack.

Replenishing before delivering the payload adds a little latency.
Eliminate that by requesting a replenish after the payload is
delivered.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ipa: kill replenish_backlog
Alex Elder [Thu, 3 Feb 2022 17:09:25 +0000 (11:09 -0600)]
net: ipa: kill replenish_backlog

We no longer use the replenish_backlog atomic variable to decide
when we've got work to do providing receive buffers to hardware.
Basically, we try to keep the hardware as full as possible, all the
time.  We keep supplying buffers until the hardware has no more
space for them.

As a result, we can get rid of the replenish_backlog field and the
atomic operations performed on it.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ipa: introduce gsi_channel_trans_idle()
Alex Elder [Thu, 3 Feb 2022 17:09:24 +0000 (11:09 -0600)]
net: ipa: introduce gsi_channel_trans_idle()

Create a new function that returns true if all transactions for a
channel are available for use.

Use it in ipa_endpoint_replenish_enable() to see whether to start
replenishing, and in ipa_endpoint_replenish() to determine whether
it's necessary after a failure to schedule delayed work to ensure a
future replenish attempt occurs.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ipa: don't use replenish_backlog
Alex Elder [Thu, 3 Feb 2022 17:09:23 +0000 (11:09 -0600)]
net: ipa: don't use replenish_backlog

Rather than determining when to stop replenishing using the
replenish backlog, just stop when we have exhausted all available
transactions.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ipa: allocate transaction in replenish loop
Alex Elder [Thu, 3 Feb 2022 17:09:22 +0000 (11:09 -0600)]
net: ipa: allocate transaction in replenish loop

When replenishing, have ipa_endpoint_replenish() allocate a
transaction, and pass that to ipa_endpoint_replenish_one() to fill.
Then, if that produces no error, commit the transaction within the
replenish loop as well.  In this way we can distinguish between
transaction failures and buffer allocation/mapping failures.

Failure to allocate a transaction simply means the hardware already
has as many receive buffers as it can hold.  In that case we can
break out of the replenish loop because there's nothing more to do.

If we fail to allocate or map pages for the receive buffer, just
try again later.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ipa: decide on doorbell in replenish loop
Alex Elder [Thu, 3 Feb 2022 17:09:21 +0000 (11:09 -0600)]
net: ipa: decide on doorbell in replenish loop

Decide whether the doorbell should be signaled when committing a
replenish transaction in the main replenish loop, rather than in
ipa_endpoint_replenish_one().  This is a step to facilitate the
next patch.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ipa: increment backlog in replenish caller
Alex Elder [Thu, 3 Feb 2022 17:09:20 +0000 (11:09 -0600)]
net: ipa: increment backlog in replenish caller

Three spots call ipa_endpoint_replenish(), and just one of those
requests that the backlog be incremented after completing the
replenish operation.

Instead, have the caller increment the backlog, and get rid of the
add_one argument to ipa_endpoint_replenish().

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ipa: allocate transaction before pages when replenishing
Alex Elder [Thu, 3 Feb 2022 17:09:19 +0000 (11:09 -0600)]
net: ipa: allocate transaction before pages when replenishing

A transaction failure only occurs if no more transactions are
available for an endpoint.  It's a very cheap test.

When replenishing an RX endpoint buffer, there's no point in
allocating pages if transactions are exhausted.  So don't bother
doing so unless the transaction allocation succeeds.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ipa: kill replenish_saved
Alex Elder [Thu, 3 Feb 2022 17:09:18 +0000 (11:09 -0600)]
net: ipa: kill replenish_saved

The replenish_saved field keeps track of the number of times a new
buffer is added to the backlog when replenishing is disabled.  We
don't really use it though, so there's no need for us to track it
separately.  Whether replenishing is enabled or not, we can simply
increment the backlog.

Get rid of replenish_saved, and initialize and increment the backlog
where it would have otherwise been used.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agotls: cap the output scatter list to something reasonable
Jakub Kicinski [Wed, 2 Feb 2022 22:20:31 +0000 (14:20 -0800)]
tls: cap the output scatter list to something reasonable

TLS recvmsg() passes user pages as destination for decrypt.
The decrypt operation is repeated record by record, each
record being 16kB, max. TLS allocates an sg_table and uses
iov_iter_get_pages() to populate it with enough pages to
fit the decrypted record.

Even though we decrypt a single message at a time we size
the sg_table based on the entire length of the iovec.
This leads to unnecessarily large allocations, risking
triggering OOM conditions.

Use iov_iter_truncate() / iov_iter_reexpand() to construct
a "capped" version of iov_iter_npages(). Alternatively we
could parametrize iov_iter_npages() to take the size as
arg instead of using i->count, or do something else..

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: realtek: convert to phylink_generic_validate()
Russell King (Oracle) [Wed, 2 Feb 2022 16:29:25 +0000 (16:29 +0000)]
net: dsa: realtek: convert to phylink_generic_validate()

Populate the supported interfaces and MAC capabilities for the Realtek
rtl8365 DSA switch and remove the old validate implementation to allow
DSA to use phylink_generic_validate() for this switch driver.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next...
David S. Miller [Fri, 4 Feb 2022 10:09:42 +0000 (10:09 +0000)]
Merge branch '40GbE' of git://git./linux/kernel/git/tnguy/next-queue

Tony Nguyen says:

====================
40GbE Intel Wired LAN Driver Updates 2022-02-03

This series contains updates to the i40e client header file and driver.

Mateusz disables HW TC offload by default.

Joe Damato removes a no longer used statistic.

Jakub Kicinski removes an unused enum from the client header file.

Jedrzej changes some admin queue commands to occur under atomic context
and adds new functions for admin queue MAC VLAN filters to avoid a
potential race that could occur due storing results in a structure that
could be overwritten by the next admin queue call.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: lan966x: use .mac_select_pcs() interface
Horatiu Vultur [Wed, 2 Feb 2022 11:49:49 +0000 (12:49 +0100)]
net: lan966x: use .mac_select_pcs() interface

Convert lan966x to use the mac_select_interface instead of
phylink_set_pcs.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/20220202114949.833075-1-horatiu.vultur@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: rtnetlink: Use more sensible tos values
Guillaume Nault [Wed, 2 Feb 2022 15:24:21 +0000 (16:24 +0100)]
selftests: rtnetlink: Use more sensible tos values

Using tos 0x1 with 'ip route get <IPv4 address> ...' doesn't test much
of the tos option handling: 0x1 just sets an ECN bit, which is cleared
by inet_rtm_getroute() before doing the fib lookup. Let's use 0x10
instead, which is actually taken into account in the route lookup (and
is less surprising for the reader).

For consistency, use 0x10 for the IPv6 route lookup too (IPv6 currently
doesn't clear ECN bits, but might do so in the future).

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Link: https://lore.kernel.org/r/d61119e68d01ba7ef3ba50c1345a5123a11de123.1643815297.git.gnault@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoselftests: fib offload: use sensible tos values
Guillaume Nault [Wed, 2 Feb 2022 18:30:28 +0000 (19:30 +0100)]
selftests: fib offload: use sensible tos values

Although both iproute2 and the kernel accept 1 and 2 as tos values for
new routes, those are invalid. These values only set ECN bits, which
are ignored during IPv4 fib lookups. Therefore, no packet can actually
match such routes. This selftest therefore only succeeds because it
doesn't verify that the new routes do actually work in practice (it
just checks if the routes are offloaded or not).

It makes more sense to use tos values that don't conflict with ECN.
This way, the selftest won't be affected if we later decide to warn or
even reject invalid tos configurations for new routes.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://lore.kernel.org/r/5e43b343720360a1c0e4f5947d9e917b26f30fbf.1643826556.git.gnault@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: minor __dev_alloc_name() optimization
Eric Dumazet [Thu, 3 Feb 2022 06:46:09 +0000 (22:46 -0800)]
net: minor __dev_alloc_name() optimization

__dev_alloc_name() allocates a private zeroed page,
then sets bits in it while iterating through net devices.

It can use __set_bit() to avoid unnecessary locked operations.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20220203064609.3242863-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Jakub Kicinski [Fri, 4 Feb 2022 01:36:16 +0000 (17:36 -0800)]
Merge git://git./linux/kernel/git/netdev/net

No conflicts.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agogcc-plugins/stackleak: Use noinstr in favor of notrace
Kees Cook [Thu, 3 Feb 2022 20:17:54 +0000 (12:17 -0800)]
gcc-plugins/stackleak: Use noinstr in favor of notrace

While the stackleak plugin was already using notrace, objtool is now a
bit more picky.  Update the notrace uses to noinstr.  Silences the
following objtool warnings when building with:

CONFIG_DEBUG_ENTRY=y
CONFIG_STACK_VALIDATION=y
CONFIG_VMLINUX_VALIDATION=y
CONFIG_GCC_PLUGIN_STACKLEAK=y

  vmlinux.o: warning: objtool: do_syscall_64()+0x9: call to stackleak_track_stack() leaves .noinstr.text section
  vmlinux.o: warning: objtool: do_int80_syscall_32()+0x9: call to stackleak_track_stack() leaves .noinstr.text section
  vmlinux.o: warning: objtool: exc_general_protection()+0x22: call to stackleak_track_stack() leaves .noinstr.text section
  vmlinux.o: warning: objtool: fixup_bad_iret()+0x20: call to stackleak_track_stack() leaves .noinstr.text section
  vmlinux.o: warning: objtool: do_machine_check()+0x27: call to stackleak_track_stack() leaves .noinstr.text section
  vmlinux.o: warning: objtool: .text+0x5346e: call to stackleak_erase() leaves .noinstr.text section
  vmlinux.o: warning: objtool: .entry.text+0x143: call to stackleak_erase() leaves .noinstr.text section
  vmlinux.o: warning: objtool: .entry.text+0x10eb: call to stackleak_erase() leaves .noinstr.text section
  vmlinux.o: warning: objtool: .entry.text+0x17f9: call to stackleak_erase() leaves .noinstr.text section

Note that the plugin's addition of calls to stackleak_track_stack() from
noinstr functions is expected to be safe, as it isn't runtime
instrumentation and is self-contained.

Cc: Alexander Popov <alex.popov@linux.com>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMerge tag 'net-5.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Fri, 4 Feb 2022 00:54:18 +0000 (16:54 -0800)]
Merge tag 'net-5.17-rc3' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Including fixes from bpf, netfilter, and ieee802154.

  Current release - regressions:

   - Partially revert "net/smc: Add netlink net namespace support", fix
     uABI breakage

   - netfilter:
      - nft_ct: fix use after free when attaching zone template
      - nft_byteorder: track register operations

  Previous releases - regressions:

   - ipheth: fix EOVERFLOW in ipheth_rcvbulk_callback

   - phy: qca8081: fix speeds lower than 2.5Gb/s

   - sched: fix use-after-free in tc_new_tfilter()

  Previous releases - always broken:

   - tcp: fix mem under-charging with zerocopy sendmsg()

   - tcp: add missing tcp_skb_can_collapse() test in
     tcp_shift_skb_data()

   - neigh: do not trigger immediate probes on NUD_FAILED from
     neigh_managed_work, avoid a deadlock

   - bpf: use VM_MAP instead of VM_ALLOC for ringbuf, avoid KASAN
     false-positives

   - netfilter: nft_reject_bridge: fix for missing reply from prerouting

   - smc: forward wakeup to smc socket waitqueue after fallback

   - ieee802154:
      - return meaningful error codes from the netlink helpers
      - mcr20a: fix lifs/sifs periods
      - at86rf230, ca8210: stop leaking skbs on error paths

   - macsec: add missing un-offload call for NETDEV_UNREGISTER of parent

   - ax25: add refcount in ax25_dev to avoid UAF bugs

   - eth: mlx5e:
      - fix SFP module EEPROM query
      - fix broken SKB allocation in HW-GRO
      - IPsec offload: fix tunnel mode crypto for non-TCP/UDP flows

   - eth: amd-xgbe:
      - fix skb data length underflow
      - ensure reset of the tx_timer_active flag, avoid Tx timeouts

   - eth: stmmac: fix runtime pm use in stmmac_dvr_remove()

   - eth: e1000e: handshake with CSME starts from Alder Lake platforms"

* tag 'net-5.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (69 commits)
  ax25: fix reference count leaks of ax25_dev
  net: stmmac: ensure PTP time register reads are consistent
  net: ipa: request IPA register values be retained
  dt-bindings: net: qcom,ipa: add optional qcom,qmp property
  tools/resolve_btfids: Do not print any commands when building silently
  bpf: Use VM_MAP instead of VM_ALLOC for ringbuf
  net, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work
  tcp: add missing tcp_skb_can_collapse() test in tcp_shift_skb_data()
  net: sparx5: do not refer to skb after passing it on
  Partially revert "net/smc: Add netlink net namespace support"
  net/mlx5e: Avoid field-overflowing memcpy()
  net/mlx5e: Use struct_group() for memcpy() region
  net/mlx5e: Avoid implicit modify hdr for decap drop rule
  net/mlx5e: IPsec: Fix tunnel mode crypto offload for non TCP/UDP traffic
  net/mlx5e: IPsec: Fix crypto offload for non TCP/UDP encapsulated traffic
  net/mlx5e: Don't treat small ceil values as unlimited in HTB offload
  net/mlx5: E-Switch, Fix uninitialized variable modact
  net/mlx5e: Fix handling of wrong devices during bond netevent
  net/mlx5e: Fix broken SKB allocation in HW-GRO
  net/mlx5e: Fix wrong calculation of header index in HW_GRO
  ...

2 years agoMerge tag 'selinux-pr-20220203' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 4 Feb 2022 00:44:12 +0000 (16:44 -0800)]
Merge tag 'selinux-pr-20220203' of git://git./linux/kernel/git/pcmoore/selinux

Pull selinux fix from Paul Moore:
 "One small SELinux patch to ensure that a policy structure field is
  properly reset after freeing so that we don't inadvertently do a
  double-free on certain error conditions"

* tag 'selinux-pr-20220203' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
  selinux: fix double free of cond_list on error paths

2 years agoMerge tag 'linux-kselftest-fixes-5.17-rc3' of git://git.kernel.org/pub/scm/linux...
Linus Torvalds [Fri, 4 Feb 2022 00:36:26 +0000 (16:36 -0800)]
Merge tag 'linux-kselftest-fixes-5.17-rc3' of git://git./linux/kernel/git/shuah/linux-kselftest

Pull Kselftest fixes from Shuah Khan:
 "Important fixes to several tests and documentation clarification on
  running mainline kselftest on stable releases. A few notable fixes:

   - fix kselftest run hang due to child processes that haven't been
     terminated. Fix signals all child processes

   - fix false pass/fail results from vdso_test_abi, openat2, mincore

   - build failures when using -j (multiple jobs) option

   - exec test build failure due to incorrect build rule for a run-time
     created "pipe"

   - zram test fixes related to interaction with zram-generator to make
     sure zram test to coordinate deleted with zram-generator

   - zram test compression ratio calculation fix and skipping
     max_comp_streams.

   - increasing rtc test timeout

   - cpufreq test to write test results to stdout which will necessary
     on automated test systems"

* tag 'linux-kselftest-fixes-5.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  kselftest: Fix vdso_test_abi return status
  selftests: skip mincore.check_file_mmap when fs lacks needed support
  selftests: openat2: Skip testcases that fail with EOPNOTSUPP
  selftests: openat2: Add missing dependency in Makefile
  selftests: openat2: Print also errno in failure messages
  selftests: futex: Use variable MAKE instead of make
  selftests/exec: Remove pipe from TEST_GEN_FILES
  selftests/zram: Adapt the situation that /dev/zram0 is being used
  selftests/zram01.sh: Fix compression ratio calculation
  selftests/zram: Skip max_comp_streams interface on newer kernel
  docs/kselftest: clarify running mainline tests on stables
  kselftest: signal all child processes
  selftests: cpufreq: Write test output to stdout as well
  selftests: rtc: Increase test timeout so that all tests run

2 years agoax25: fix reference count leaks of ax25_dev
Duoming Zhou [Thu, 3 Feb 2022 15:08:11 +0000 (23:08 +0800)]
ax25: fix reference count leaks of ax25_dev

The previous commit d01ffb9eee4a ("ax25: add refcount in ax25_dev
to avoid UAF bugs") introduces refcount into ax25_dev, but there
are reference leak paths in ax25_ctl_ioctl(), ax25_fwd_ioctl(),
ax25_rt_add(), ax25_rt_del() and ax25_rt_opt().

This patch uses ax25_dev_put() and adjusts the position of
ax25_addr_ax25dev() to fix reference cout leaks of ax25_dev.

Fixes: d01ffb9eee4a ("ax25: add refcount in ax25_dev to avoid UAF bugs")
Signed-off-by: Duoming Zhou <duoming@zju.edu.cn>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20220203150811.42256-1-duoming@zju.edu.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: stmmac: ensure PTP time register reads are consistent
Yannick Vignon [Thu, 3 Feb 2022 16:00:25 +0000 (17:00 +0100)]
net: stmmac: ensure PTP time register reads are consistent

Even if protected from preemption and interrupts, a small time window
remains when the 2 register reads could return inconsistent values,
each time the "seconds" register changes. This could lead to an about
1-second error in the reported time.

Add logic to ensure the "seconds" and "nanoseconds" values are consistent.

Fixes: 92ba6888510c ("stmmac: add the support for PTP hw clock driver")
Signed-off-by: Yannick Vignon <yannick.vignon@nxp.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/20220203160025.750632-1-yannick.vignon@oss.nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Jakub Kicinski [Thu, 3 Feb 2022 21:42:38 +0000 (13:42 -0800)]
Merge https://git./linux/kernel/git/bpf/bpf

Daniel Borkmann says:

====================
pull-request: bpf 2022-02-03

We've added 6 non-merge commits during the last 10 day(s) which contain
a total of 7 files changed, 11 insertions(+), 236 deletions(-).

The main changes are:

1) Fix BPF ringbuf to allocate its area with VM_MAP instead of VM_ALLOC
   flag which otherwise trips over KASAN, from Hou Tao.

2) Fix unresolved symbol warning in resolve_btfids due to LSM callback
   rename, from Alexei Starovoitov.

3) Fix a possible race in inc_misses_counter() when IRQ would trigger
   during counter update, from He Fengqing.

4) Fix tooling infra for cross-building with clang upon probing whether
   gcc provides the standard libraries, from Jean-Philippe Brucker.

5) Fix silent mode build for resolve_btfids, from Nathan Chancellor.

6) Drop unneeded and outdated lirc.h header copy from tooling infra as
   BPF does not require it anymore, from Sean Young.

* https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
  tools/resolve_btfids: Do not print any commands when building silently
  bpf: Use VM_MAP instead of VM_ALLOC for ringbuf
  tools: Ignore errors from `which' when searching a GCC toolchain
  tools headers UAPI: remove stale lirc.h
  bpf: Fix possible race in inc_misses_counter
  bpf: Fix renaming task_getsecid_subj->current_getsecid_subj.
====================

Link: https://lore.kernel.org/r/20220203155815.25689-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoi40e: Fix race condition while adding/deleting MAC/VLAN filters
Jedrzej Jagielski [Fri, 14 Jan 2022 13:19:31 +0000 (13:19 +0000)]
i40e: Fix race condition while adding/deleting MAC/VLAN filters

There was a race condition in access to hw->aq.asq_last_status
while adding and deleting  MAC/VLAN filters causing
incorrect error status to be printed as ERROR OK instead of
the correct error.

Change calls to i40e_aq_add_macvlan in i40e_aqc_add_filters
and i40e_aq_remove_macvlan in i40e_aqc_del_filters
to  _v2 versions that return Admin Queue status on the stack
to avoid race conditions in access to hw->aq.asq_last_status.

Signed-off-by: Sylwester Dziedziuch <sylwesterx.dziedziuch@intel.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoi40e: Add new version of i40e_aq_add_macvlan function
Jedrzej Jagielski [Fri, 14 Jan 2022 13:19:30 +0000 (13:19 +0000)]
i40e: Add new version of i40e_aq_add_macvlan function

ASQ send command functions are returning only i40e status codes
yet some calling functions also need Admin Queue status
that is stored in hw->aq.asq_last_status. Since hw object
is stored on a heap it introduces a possibility for
a race condition in access to hw if calling function is not
fast enough to read hw->aq.asq_last_status before next
send ASQ command is executed.

Add new _v2 version of i40e_aq_add_macvlan that is using
new _v2 versions of ASQ send command functions and returns
the Admin Queue status on the stack.

Signed-off-by: Sylwester Dziedziuch <sylwesterx.dziedziuch@intel.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoi40e: Add new versions of send ASQ command functions
Jedrzej Jagielski [Fri, 14 Jan 2022 13:19:29 +0000 (13:19 +0000)]
i40e: Add new versions of send ASQ command functions

ASQ send command functions are returning only i40e status codes
yet some calling functions also need Admin Queue status
that is stored in hw->aq.asq_last_status. Since hw object
is stored on a heap it introduces a possibility for
a race condition in access to hw if calling function is not
fast enough to read hw->aq.asq_last_status before next
send ASQ command is executed.

Add new versions of send ASQ command functions that return
Admin Queue status on the stack to avoid race conditions
in access to hw->aq.asq_last_status.
Add new _v2 version of i40e_aq_remove_macvlan that is using
new _v2 versions of ASQ send command functions and returns
the Admin Queue status on the stack.

Signed-off-by: Sylwester Dziedziuch <sylwesterx.dziedziuch@intel.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoi40e: Add sending commands in atomic context
Jedrzej Jagielski [Fri, 14 Jan 2022 13:19:28 +0000 (13:19 +0000)]
i40e: Add sending commands in atomic context

Change functions:
- i40e_aq_add_macvlan
- i40e_aq_remove_macvlan
- i40e_aq_delete_element
- i40e_aq_add_vsi
- i40e_aq_update_vsi_params
to explicitly use i40e_asq_send_command_atomic(..., true)
instead of i40e_asq_send_command, as they use mutexes and do some
work in an atomic context.
Without this change setting vlan via netdev will fail with
call trace cased by bug "BUG: scheduling while atomic".

Signed-off-by: Witold Fijalkowski <witoldx.fijalkowski@intel.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoi40e: remove enum i40e_client_state
Jakub Kicinski [Wed, 26 Jan 2022 18:55:44 +0000 (10:55 -0800)]
i40e: remove enum i40e_client_state

It's not used.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoi40e: Remove unused RX realloc stat
Joe Damato [Wed, 5 Jan 2022 15:49:13 +0000 (07:49 -0800)]
i40e: Remove unused RX realloc stat

After commit 1a557afc4dd5 ("i40e: Refactor receive routine"),
rx_stats.realloc_count is no longer being incremented, so remove it.

The debugfs string was left, but hardcoded to 0. This is intended to
prevent breaking any existing code / scripts that are parsing debugfs
for i40e.

Signed-off-by: Joe Damato <jdamato@fastly.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoi40e: Disable hw-tc-offload feature on driver load
Mateusz Palczewski [Thu, 16 Dec 2021 12:31:13 +0000 (13:31 +0100)]
i40e: Disable hw-tc-offload feature on driver load

After loading driver hw-tc-offload is enabled by default.
Change the behaviour of driver to disable hw-tc-offload by default as
this is the expected state. Additionally since this impacts ntuple
feature state change the way of checking NETIF_F_HW_TC flag.

Signed-off-by: Norbert Zulinski <norbertx.zulinski@intel.com>
Signed-off-by: Przemyslaw Patynowski <przemyslawx.patynowski@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoprintk: Fix incorrect __user type in proc_dointvec_minmax_sysadmin()
Mickaël Salaün [Thu, 3 Feb 2022 14:50:29 +0000 (15:50 +0100)]
printk: Fix incorrect __user type in proc_dointvec_minmax_sysadmin()

The move of proc_dointvec_minmax_sysadmin() from kernel/sysctl.c to
kernel/printk/sysctl.c introduced an incorrect __user attribute to the
buffer argument.  I spotted this change in [1] as well as the kernel
test robot.  Revert this change to please sparse:

  kernel/printk/sysctl.c:20:51: warning: incorrect type in argument 3 (different address spaces)
  kernel/printk/sysctl.c:20:51:    expected void *
  kernel/printk/sysctl.c:20:51:    got void [noderef] __user *buffer

Fixes: faaa357a55e0 ("printk: move printk sysctl to printk/sysctl.c")
Link: https://lore.kernel.org/r/20220104155024.48023-2-mic@digikod.net
Reported-by: kernel test robot <lkp@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Xiaoming Ni <nixiaoming@huawei.com>
Signed-off-by: Mickaël Salaün <mic@linux.microsoft.com>
Link: https://lore.kernel.org/r/20220203145029.272640-1-mic@digikod.net
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoRevert "module, async: async_synchronize_full() on module init iff async is used"
Igor Pylypiv [Thu, 27 Jan 2022 23:39:53 +0000 (15:39 -0800)]
Revert "module, async: async_synchronize_full() on module init iff async is used"

This reverts commit 774a1221e862b343388347bac9b318767336b20b.

We need to finish all async code before the module init sequence is
done.  In the reverted commit the PF_USED_ASYNC flag was added to mark a
thread that called async_schedule().  Then the PF_USED_ASYNC flag was
used to determine whether or not async_synchronize_full() needs to be
invoked.  This works when modprobe thread is calling async_schedule(),
but it does not work if module dispatches init code to a worker thread
which then calls async_schedule().

For example, PCI driver probing is invoked from a worker thread based on
a node where device is attached:

if (cpu < nr_cpu_ids)
error = work_on_cpu(cpu, local_pci_probe, &ddi);
else
error = local_pci_probe(&ddi);

We end up in a situation where a worker thread gets the PF_USED_ASYNC
flag set instead of the modprobe thread.  As a result,
async_synchronize_full() is not invoked and modprobe completes without
waiting for the async code to finish.

The issue was discovered while loading the pm80xx driver:
(scsi_mod.scan=async)

modprobe pm80xx                      worker
...
  do_init_module()
  ...
    pci_call_probe()
      work_on_cpu(local_pci_probe)
                                     local_pci_probe()
                                       pm8001_pci_probe()
                                         scsi_scan_host()
                                           async_schedule()
                                           worker->flags |= PF_USED_ASYNC;
                                     ...
      < return from worker >
  ...
  if (current->flags & PF_USED_ASYNC) <--- false
   async_synchronize_full();

Commit 21c3c5d28007 ("block: don't request module during elevator init")
fixed the deadlock issue which the reverted commit 774a1221e862
("module, async: async_synchronize_full() on module init iff async is
used") tried to fix.

Since commit 0fdff3ec6d87 ("async, kmod: warn on synchronous
request_module() from async workers") synchronous module loading from
async is not allowed.

Given that the original deadlock issue is fixed and it is no longer
allowed to call synchronous request_module() from async we can remove
PF_USED_ASYNC flag to make module init consistently invoke
async_synchronize_full() unless async module probe is requested.

Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
Reviewed-by: Changyuan Lyu <changyuanl@google.com>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMerge branch 'for-5.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
Linus Torvalds [Thu, 3 Feb 2022 16:15:13 +0000 (08:15 -0800)]
Merge branch 'for-5.17-fixes' of git://git./linux/kernel/git/tj/cgroup

Pull cgroup fixes from Tejun Heo:

 - Eric's fix for a long standing cgroup1 permission issue where it only
   checks for uid 0 instead of CAP which inadvertently allows
   unprivileged userns roots to modify release_agent userhelper

 - Fixes for the fallout from Waiman's recent cpuset work

* 'for-5.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup/cpuset: Fix "suspicious RCU usage" lockdep warning
  cgroup-v1: Require capabilities to set release_agent
  cpuset: Fix the bug that subpart_cpus updated wrongly in update_cpumask()
  cgroup/cpuset: Make child cpusets restrict parents on v1 hierarchy

2 years agoMerge branch 'net-ipa-enable-register-retention'
Jakub Kicinski [Thu, 3 Feb 2022 16:04:15 +0000 (08:04 -0800)]
Merge branch 'net-ipa-enable-register-retention'

Alex Elder says:

====================
net: ipa: enable register retention

With runtime power management in place, we sometimes need to issue
a command to enable retention of IPA register values before power
collapse.  This requires a new Device Tree property, whose presence
will also be used to signal that the command is required.
====================

Link: https://lore.kernel.org/r/20220201150205.468403-1-elder@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: ipa: request IPA register values be retained
Alex Elder [Tue, 1 Feb 2022 15:02:05 +0000 (09:02 -0600)]
net: ipa: request IPA register values be retained

In some cases, the IPA hardware needs to request the always-on
subsystem (AOSS) to coordinate with the IPA microcontroller to
retain IPA register values at power collapse.  This is done by
issuing a QMP request to the AOSS microcontroller.  A similar
request ondoes that request.

We must get and hold the "QMP" handle early, because we might get
back EPROBE_DEFER for that.  But the actual request should be sent
while we know the IPA clock is active, and when we know the
microcontroller is operational.

Fixes: 1aac309d3207 ("net: ipa: use autosuspend")
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agodt-bindings: net: qcom,ipa: add optional qcom,qmp property
Alex Elder [Tue, 1 Feb 2022 15:02:04 +0000 (09:02 -0600)]
dt-bindings: net: qcom,ipa: add optional qcom,qmp property

For some systems, the IPA driver must make a request to ensure that
its registers are retained across power collapse of the IPA hardware.
On such systems, we'll use the existence of the "qcom,qmp" property
as a signal that this request is required.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agocgroup/cpuset: Fix "suspicious RCU usage" lockdep warning
Waiman Long [Thu, 3 Feb 2022 03:31:03 +0000 (22:31 -0500)]
cgroup/cpuset: Fix "suspicious RCU usage" lockdep warning

It was found that a "suspicious RCU usage" lockdep warning was issued
with the rcu_read_lock() call in update_sibling_cpumasks().  It is
because the update_cpumasks_hier() function may sleep. So we have
to release the RCU lock, call update_cpumasks_hier() and reacquire
it afterward.

Also add a percpu_rwsem_assert_held() in update_sibling_cpumasks()
instead of stating that in the comment.

Fixes: 4716909cc5c5 ("cpuset: Track cpusets that use parent's effective_cpus")
Signed-off-by: Waiman Long <longman@redhat.com>
Tested-by: Phil Auld <pauld@redhat.com>
Reviewed-by: Phil Auld <pauld@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2 years agotools/resolve_btfids: Do not print any commands when building silently
Nathan Chancellor [Tue, 1 Feb 2022 21:25:04 +0000 (14:25 -0700)]
tools/resolve_btfids: Do not print any commands when building silently

When building with 'make -s', there is some output from resolve_btfids:

$ make -sj"$(nproc)" oldconfig prepare
  MKDIR     .../tools/bpf/resolve_btfids/libbpf/
  MKDIR     .../tools/bpf/resolve_btfids//libsubcmd
  LINK     resolve_btfids

Silent mode means that no information should be emitted about what is
currently being done. Use the $(silent) variable from Makefile.include
to avoid defining the msg macro so that there is no information printed.

Fixes: fbbb68de80a4 ("bpf: Add resolve_btfids tool to resolve BTF IDs in ELF object")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220201212503.731732-1-nathan@kernel.org
2 years agoRevert "mm/gup: small refactoring: simplify try_grab_page()"
John Hubbard [Wed, 2 Feb 2022 03:23:17 +0000 (19:23 -0800)]
Revert "mm/gup: small refactoring: simplify try_grab_page()"

This reverts commit 54d516b1d62ff8f17cee2da06e5e4706a0d00b8a

That commit did a refactoring that effectively combined fast and slow
gup paths (again).  And that was again incorrect, for two reasons:

 a) Fast gup and slow gup get reference counts on pages in different
    ways and with different goals: see Linus' writeup in commit
    cd1adf1b63a1 ("Revert "mm/gup: remove try_get_page(), call
    try_get_compound_head() directly""), and

 b) try_grab_compound_head() also has a specific check for
    "FOLL_LONGTERM && !is_pinned(page)", that assumes that the caller
    can fall back to slow gup. This resulted in new failures, as
    recently report by Will McVicker [1].

But (a) has problems too, even though they may not have been reported
yet.  So just revert this.

Link: https://lore.kernel.org/r/20220131203504.3458775-1-willmcvicker@google.com
Fixes: 54d516b1d62f ("mm/gup: small refactoring: simplify try_grab_page()")
Reported-and-tested-by: Will McVicker <willmcvicker@google.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Minchan Kim <minchan@google.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: stable@vger.kernel.org # 5.15
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2 years agoMerge tag 'mips-fixes-5.17_2' of git://git.kernel.org/pub/scm/linux/kernel/git/mips...
Linus Torvalds [Thu, 3 Feb 2022 14:45:34 +0000 (06:45 -0800)]
Merge tag 'mips-fixes-5.17_2' of git://git./linux/kernel/git/mips/linux

Pull MIPS fixes from Thomas Bogendoerfer:

 - fix missed change for PTR->PTR_WD conversion

 - kernel-doc fixes

* tag 'mips-fixes-5.17_2' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: KVM: fix vz.c kernel-doc notation
  MIPS: octeon: Fix missed PTR->PTR_WD conversion

2 years agoMerge branch 'dsa-mv88e6xxx-phylink_generic_validate'
David S. Miller [Thu, 3 Feb 2022 14:10:35 +0000 (14:10 +0000)]
Merge branch 'dsa-mv88e6xxx-phylink_generic_validate'

Russell King says:

====================
net: dsa: mv88e6xxx: convert to phylink_generic_validate()

The overall objective of this series is to convert the mv88e6xxx DSA
driver to use phylink_generic_validate().

Patch 1 adds a new helper mv88e6352_g2_scratch_port_has_serdes() which
indicates whether an 88e6352 port has a serdes associated with it. This
is necessary as ports 4 and 5 will normally be in automedia mode, where
the CMODE field in the port status register will change e.g. between 15
(internal PHY) and 9 (1000base-X) depending on whether the serdes has
link.

The existing code caches the cmode field, and depending whether the
serdes has link at probe time, determines whether we allow things such
as the serdes statistics to be accessed. This means if the link isn't
up at probe time, the serdes is essentially unavailable.

Patch 1 addresses this by reading the pin configuration to find out
whether the serdes is attached to port 4 or port 5.

Patch 2 is a joint effort between myself and Marek Behún, adding the
supported interfaces and MAC capabilities to all mv88e6xxx supported
switch devices. This is slightly more restrictive than the original
code as we didn't used to care too much about the interface mode, but
with this we do - which is why we must know if there's a serdes
associated now.

Patch 3 switches mv88e6xxx to use the generic validation by removing
the initialisation of the phylink_validate pointer in the dsa_ops
struct.

Patch 4 updates the statistics code to use the new helper in patch 1,
so the serdes statistics are available even if the link was down at
driver probe time.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: mv88e6xxx: improve 88e6352 serdes statistics detection
Russell King (Oracle) [Thu, 3 Feb 2022 13:30:52 +0000 (13:30 +0000)]
net: dsa: mv88e6xxx: improve 88e6352 serdes statistics detection

The decision whether to report serdes statistics currently depends on
the cached C_Mode value for the port, read at probe time or updated by
configuration. However, port 4 can be in "automedia" mode when it is
used as a serdes port, meaning it switches between the internal PHY and
the serdes, changing the read-only C_Mode value depending on which
first gains link. Consequently, the C_Mode value read at probe does not
accurately reflect whether the port has the serdes associated with it.

In "net: dsa: mv88e6xxx: add mv88e6352_g2_scratch_port_has_serdes()",
we added a way to read the hardware configuration to determine which
port has the serdes associated with it. Use this to determine which
port reports the serdes statistics.

Reviewed-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: mv88e6xxx: convert to phylink_generic_validate()
Russell King (Oracle) [Thu, 3 Feb 2022 13:30:47 +0000 (13:30 +0000)]
net: dsa: mv88e6xxx: convert to phylink_generic_validate()

Now that the mv88e6xxx chip drivers are supplying the supported
interfaces and MAC capabilities, switch the driver to use the generic
phylink validation implementation by removing our own validation
implementations. This causes DSA to call phylink_generic_validate()
on our behalf.

Reviewed-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: mv88e6xxx: populate supported_interfaces and mac_capabilities
Russell King (Oracle) [Thu, 3 Feb 2022 13:30:42 +0000 (13:30 +0000)]
net: dsa: mv88e6xxx: populate supported_interfaces and mac_capabilities

Populate the supported interfaces and MAC capabilities for the
Marvell MV88E6xxx DSA switches in preparation to using these for the
validation functionality.

Patch co-authored by Marek.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Marek Behún <kabel@kernel.org> [ fixed 6341 and 6393x ]
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: mv88e6xxx: add mv88e6352_g2_scratch_port_has_serdes()
Russell King (Oracle) [Thu, 3 Feb 2022 13:30:36 +0000 (13:30 +0000)]
net: dsa: mv88e6xxx: add mv88e6352_g2_scratch_port_has_serdes()

Read the hardware configuration to determine which port is attached
to the serdes.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'dsa-mv88e6xxx-port-isolation'
David S. Miller [Thu, 3 Feb 2022 14:05:57 +0000 (14:05 +0000)]
Merge branch 'dsa-mv88e6xxx-port-isolation'

Tobias Waldekranz says:

====================
net: dsa: mv88e6xxx: Improve standalone port isolation

The ideal isolation between standalone ports satisfies two properties:
1. Packets from one standalone port must not be forwarded to any other
   port.
2. Packets from a standalone port must be sent to the CPU port.

mv88e6xxx solves (1) by isolating standalone ports using the PVT. Up
to this point though, (2) has not guaranteed; as the ATU is still
consulted, there is a chance that incoming packets never reach the CPU
if its DA has previously been used as the SA of an earlier packet (see
1/5 for more details). This is typically not a problem, except for one
very useful setup in which switch ports are looped in order to run the
bridge kselftests in tools/testing/selftests/net/forwarding. This
series attempts to solve (2).

Ideally, we could simply use the "ForceMap" bit of more modern chips
(Agate and newer) to classify all incoming packets as MGMT. This is
not available on older silicon that is still widely used (Opal Plus
chips like the 6097 for example).

Instead, this series takes a two pronged approach:

1/5: Always clear MapDA on standalone ports to make sure that no ATU
     entry can lead packets astray. This solves (2) for single-chip
     systems.

2/5: Trivial prep work for 4/5.
3/5: Trivial prep work for 4/5.

4/5: On multi-chip systems though, this is not enough. On the incoming
     chip, the packet will be forced out towards the CPU thanks to
     1/5, but on any intermediate chips the ATU is still consulted. We
     override this behavior by marking the reserved standalone VID (0)
     as a policy VID, the DSA ports' VID policy is set to TRAP. This
     will cause the packet to be reclassified as MGMT on the first
     intermediate chip, after which it's a straight shot towards the
     CPU.

Finally, we allow more tests to be run on mv88e6xxx:

5/5: The bridge_vlan{,un}aware suites sets an ageing_time of 10s on
     the bridge it creates, but mv88e6xxx has a minimum supported time
     of 15s. Allow this time to be overridden in forwarding.config.

With this series in place, mv88e6xxx passes the following kselftest
suites:

- bridge_port_isolation.sh
- bridge_sticky_fdb.sh
- bridge_vlan_aware.sh
- bridge_vlan_unaware.sh

v1 -> v2:
  - Wording/spelling (Vladimir)
  - Use standard iterator in dsa_switch_upstream_port (Vladimir)
  - Limit enabling of VTU port policy to downstream DSA ports (Vladimir)
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoselftests: net: bridge: Parameterize ageing timeout
Tobias Waldekranz [Thu, 3 Feb 2022 10:16:57 +0000 (11:16 +0100)]
selftests: net: bridge: Parameterize ageing timeout

Allow the ageing timeout that is set on bridges to be customized from
forwarding.config. This allows the tests to be run on hardware which
does not support a 10s timeout (e.g. mv88e6xxx).

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: mv88e6xxx: Improve multichip isolation of standalone ports
Tobias Waldekranz [Thu, 3 Feb 2022 10:16:56 +0000 (11:16 +0100)]
net: dsa: mv88e6xxx: Improve multichip isolation of standalone ports

Given that standalone ports are now configured to bypass the ATU and
forward all frames towards the upstream port, extend the ATU bypass to
multichip systems.

Load VID 0 (standalone) into the VTU with the policy bit set. Since
VID 4095 (bridged) is already loaded, we now know that all VIDs in use
are always available in all VTUs. Therefore, we can safely enable
802.1Q on DSA ports.

Setting the DSA ports' VTU policy to TRAP means that all incoming
frames on VID 0 will be classified as MGMT - as a result, the ATU is
bypassed on all subsequent switches.

With this isolation in place, we are able to support configurations
that are simultaneously very quirky and very useful. Quirky because it
involves looping cables between local switchports like in this
example:

   CPU
    |     .------.
.---0---. | .----0----.
|  sw0  | | |   sw1   |
'-1-2-3-' | '-1-2-3-4-'
  $ @ '---'   $ @ % %

We have three physically looped pairs ($, @, and %).

This is very useful because it allows us to run the kernel's
kselftests for the bridge on mv88e6xxx hardware.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: mv88e6xxx: Enable port policy support on 6097
Tobias Waldekranz [Thu, 3 Feb 2022 10:16:55 +0000 (11:16 +0100)]
net: dsa: mv88e6xxx: Enable port policy support on 6097

This chip has support for the same per-port policy actions found in
later versions of LinkStreet devices.

Fixes: f3a2cd326e44 ("net: dsa: mv88e6xxx: introduce .port_set_policy")
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: mv88e6xxx: Support policy entries in the VTU
Tobias Waldekranz [Thu, 3 Feb 2022 10:16:54 +0000 (11:16 +0100)]
net: dsa: mv88e6xxx: Support policy entries in the VTU

A VTU entry with policy enabled is used in combination with a port's
VTU policy setting to override normal switching behavior for frames
assigned to the entry's VID.

A typical example is to Treat all frames in a particular VLAN as
control traffic, and trap them to the CPU. In which case the relevant
user port's VTU policy would be set to TRAP.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: mv88e6xxx: Improve isolation of standalone ports
Tobias Waldekranz [Thu, 3 Feb 2022 10:16:53 +0000 (11:16 +0100)]
net: dsa: mv88e6xxx: Improve isolation of standalone ports

Clear MapDA on standalone ports to bypass any ATU lookup that might
point the packet in the wrong direction. This means that all packets
are flooded using the PVT config. So make sure that standalone ports
are only allowed to communicate with the local upstream port.

Here is a scenario in which this is needed:

   CPU
    |     .----.
.---0---. | .--0--.
|  sw0  | | | sw1 |
'-1-2-3-' | '-1-2-'
      '---'

- sw0p1 and sw1p1 are bridged
- sw0p2 and sw1p2 are in standalone mode
- Learning must be enabled on sw0p3 in order for hardware forwarding
  to work properly between bridged ports

1. A packet with SA :aa comes in on sw1p2
   1a. Egresses sw1p0
   1b. Ingresses sw0p3, ATU adds an entry for :aa towards port 3
   1c. Egresses sw0p0

2. A packet with DA :aa comes in on sw0p2
   2a. If an ATU lookup is done at this point, the packet will be
       incorrectly forwarded towards sw0p3. With this change in place,
       the ATU is bypassed and the packet is forwarded in accordance
       with the PVT, which only contains the CPU port.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'ptp-virtual-clock-improvements'
David S. Miller [Thu, 3 Feb 2022 14:00:58 +0000 (14:00 +0000)]
Merge branch 'ptp-virtual-clock-improvements'

Miroslav Lichvar says:

====================
Virtual PTP clock improvements and fix

v2:
- dropped patch changing initial time of virtual clocks

The first patch fixes an oops when unloading a driver with PTP clock and
enabled virtual clocks.

The other patches add missing features to make synchronization with
virtual clocks work as well as with the physical clock.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoptp: add getcrosststamp() to virtual clocks.
Miroslav Lichvar [Wed, 2 Feb 2022 09:33:58 +0000 (10:33 +0100)]
ptp: add getcrosststamp() to virtual clocks.

If the physical clock supports cross timestamping (it has the
getcrosststamp() function), provide a wrapper in the virtual clock to
enable cross timestamping.

This adds support for the PTP_SYS_OFFSET_PRECISE ioctl.

Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Cc: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoptp: add gettimex64() to virtual clocks.
Miroslav Lichvar [Wed, 2 Feb 2022 09:33:57 +0000 (10:33 +0100)]
ptp: add gettimex64() to virtual clocks.

If the physical clock has the gettimex64() function, provide a
gettimex64() wrapper in the virtual clock to enable more accurate
and stable synchronization.

This adds support for the PTP_SYS_OFFSET_EXTENDED ioctl.

Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Cc: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoptp: increase maximum adjustment of virtual clocks.
Miroslav Lichvar [Wed, 2 Feb 2022 09:33:56 +0000 (10:33 +0100)]
ptp: increase maximum adjustment of virtual clocks.

Increase the maximum frequency offset of virtual clocks to 50% to enable
faster slewing corrections.

This value cannot be represented as scaled ppm when long has 32 bits,
but that is already the case for other drivers, even those that provide
the adjfine() function, i.e. 32-bit applications are expected to check
for the limit.

Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Cc: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoptp: unregister virtual clocks when unregistering physical clock.
Miroslav Lichvar [Wed, 2 Feb 2022 09:33:55 +0000 (10:33 +0100)]
ptp: unregister virtual clocks when unregistering physical clock.

When unregistering a physical clock which has some virtual clocks,
unregister the virtual clocks with it.

This fixes the following oops, which can be triggered by unloading
a driver providing a PTP clock when it has enabled virtual clocks:

BUG: unable to handle page fault for address: ffffffffc04fc4d8
Oops: 0000 [#1] PREEMPT SMP NOPTI
RIP: 0010:ptp_vclock_read+0x31/0xb0
Call Trace:
 timecounter_read+0xf/0x50
 ptp_vclock_refresh+0x2c/0x50
 ? ptp_clock_release+0x40/0x40
 ptp_aux_kworker+0x17/0x30
 kthread_worker_fn+0x9b/0x240
 ? kthread_should_park+0x30/0x30
 kthread+0xe2/0x110
 ? kthread_complete_and_exit+0x20/0x20
 ret_from_fork+0x22/0x30

Fixes: 73f37068d540 ("ptp: support ptp physical/virtual clocks conversion")
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Cc: Yangbo Lu <yangbo.lu@nxp.com>
Cc: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agopage_pool: Refactor page_pool to enable fragmenting after allocation
Alexander Duyck [Mon, 31 Jan 2022 16:40:01 +0000 (08:40 -0800)]
page_pool: Refactor page_pool to enable fragmenting after allocation

This change is meant to permit a driver to perform "fragmenting" of the
page from within the driver instead of the current model which requires
pre-partitioning the page. The main motivation behind this is to support
use cases where the page will be split up by the driver after DMA instead
of before.

With this change it becomes possible to start using page pool to replace
some of the existing use cases where multiple references were being used
for a single page, but the number needed was unknown as the size could be
dynamic.

For example, with this code it would be possible to do something like
the following to handle allocation:
  page = page_pool_alloc_pages();
  if (!page)
    return NULL;
  page_pool_fragment_page(page, DRIVER_PAGECNT_BIAS_MAX);
  rx_buf->page = page;
  rx_buf->pagecnt_bias = DRIVER_PAGECNT_BIAS_MAX;

Then we would process a received buffer by handling it with:
  rx_buf->pagecnt_bias--;

Once the page has been fully consumed we could then flush the remaining
instances with:
  if (page_pool_defrag_page(page, rx_buf->pagecnt_bias))
    continue;
  page_pool_put_defragged_page(pool, page -1, !!budget);

The general idea is that we want to have the ability to allocate a page
with excess fragment count and then trim off the unneeded fragments.

Signed-off-by: Alexander Duyck <alexanderduyck@fb.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'dsa-phylink_generic_validate'
David S. Miller [Thu, 3 Feb 2022 11:47:07 +0000 (11:47 +0000)]
Merge branch 'dsa-phylink_generic_validate'

Russell King says:

====================
Trivial DSA conversions to phylink_generic_validate()

This series converts five DSA drivers to use phylink_generic_validate().
No feedback or testing reports were received from the CFT posting.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: xrs700x: convert to phylink_generic_validate()
Russell King (Oracle) [Wed, 2 Feb 2022 10:24:28 +0000 (10:24 +0000)]
net: dsa: xrs700x: convert to phylink_generic_validate()

Populate the supported interfaces and MAC capabilities for the xrs700x
family of DSA switches and remove the old validate implementation to
allow DSA to use phylink_generic_validate() for this switch driver.

According to commit ee00b24f32eb ("net: dsa: add Arrow SpeedChips
XRS700x driver") the switch supports one RMII port and up to three
RGMII ports. This commit assumes that port 0 is the RMII port and the
remainder are RGMII.

This commit also results in the Autoneg bit being set in the ethtool
link modes, which wasn't in the original; if this switch supports
RGMII to a 10/100/1G PHY, then surely we want to allow Autoneg on the
PHY.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: qca8k: convert to phylink_generic_validate()
Russell King (Oracle) [Wed, 2 Feb 2022 10:24:23 +0000 (10:24 +0000)]
net: dsa: qca8k: convert to phylink_generic_validate()

Populate the supported interfaces and MAC capabilities for the QCA8K
DSA switch and remove the old validate implementation to allow DSA to
use phylink_generic_validate() for this switch driver.

In making this change, we bring consistency to the ethtool linkmodes
that phylink's validate step produces, thereby following the expected
behaviour as the phylink documentation has explained. Specifically, the
ethtool 1000baseX_Full capability is now permitted for all interface
modes, as it is a property of the PHY driver whether 1000baseX fiber
connections can be supported.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: ksz8795: convert to phylink_generic_validate()
Russell King (Oracle) [Wed, 2 Feb 2022 10:24:18 +0000 (10:24 +0000)]
net: dsa: ksz8795: convert to phylink_generic_validate()

Populate the supported interfaces and MAC capabilities for the
Microchip KSZ8795 DSA switch and remove the old validate implementation
to allow DSA to use phylink_generic_validate() for this switch 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: bcm_sf2: convert to phylink_generic_validate()
Russell King (Oracle) [Wed, 2 Feb 2022 10:24:13 +0000 (10:24 +0000)]
net: dsa: bcm_sf2: convert to phylink_generic_validate()

Populate the supported interfaces and MAC capabilities for the bcm_sf2
DSA switch and remove the old validate implementation to allow DSA to
use phylink_generic_validate() for this switch driver.

The exclusion of Gigabit linkmodes for MII and Reverse MII links is
handled within phylink_generic_validate() in phylink, so there is no
need to make them conditional on the interface mode in the driver.

Thanks to Florian Fainelli for suggesting how to populate the supported
interfaces.

Link: https://lore.kernel.org/r/3b3fed98-0c82-99e9-dc72-09fe01c2bcf3@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: dsa: ar9331: convert to phylink_generic_validate()
Russell King (Oracle) [Wed, 2 Feb 2022 10:24:08 +0000 (10:24 +0000)]
net: dsa: ar9331: convert to phylink_generic_validate()

Populate the supported interfaces and MAC capabilities for the AR9331
DSA switch and remove the old validate implementation to allow DSA to
use phylink_generic_validate() for this switch driver.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'mptcp-next'
David S. Miller [Thu, 3 Feb 2022 11:44:08 +0000 (11:44 +0000)]
Merge branch 'mptcp-next'

Mat Martineau says:

====================
mptcp: Miscellaneous changes for 5.18

Patch 1 has some minor cleanup in mptcp_write_options().

Patch 2 moves a rarely-needed branch to optimize mptcp_write_options().

Patch 3 adds a comment explaining which combinations of MPTCP option
headers are expected.

Patch 4 adds a pr_debug() for the MPTCP_RST option.

Patches 5-7 allow setting MPTCP_PM_ADDR_FLAG_FULLMESH with the "set
flags" netlink command. This allows changing the behavior of existing
path manager endpoints. The flag was previously only set at endpoint
creation time. Associated selftests also updated.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoselftests: mptcp: add fullmesh setting tests
Geliang Tang [Thu, 3 Feb 2022 01:03:43 +0000 (17:03 -0800)]
selftests: mptcp: add fullmesh setting tests

This patch added the fullmesh setting and clearing selftests in
mptcp_join.sh.

Now we can set both backup and fullmesh flags, so avoid using the
words 'backup' and 'bkup'.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoselftests: mptcp: set fullmesh flag in pm_nl_ctl
Geliang Tang [Thu, 3 Feb 2022 01:03:42 +0000 (17:03 -0800)]
selftests: mptcp: set fullmesh flag in pm_nl_ctl

This patch added the fullmesh flag setting and clearing support in
pm_nl_ctl:

 # pm_nl_ctl set ip flags fullmesh
 # pm_nl_ctl set ip flags nofullmesh

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliang.tang@suse.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>