Resets may occur with or without user interaction. For example, a TX hang
or reconfiguration of parameters will result in a reset. During reset, the
VSI is freed, freeing any statistics structures inside as well. This would
create an issue for the user where a reset happens in the background,
statistics set to zero, and the user checks ring statistics expecting them
to be populated.

To ensure this doesn't happen, accumulate ring statistics over reset.

Define a new ring statistics structure, ice_ring_stats. The new structure
lives in the VSI's parent, preserving ring statistics when VSI is freed.

1. Define a new structure vsi_ring_stats in the PF scope
2. Allocate/free stats only during probe, unload, or change in ring size
3. Replace previous ring statistics functionality with new structure
Signed-off-by: Benjamin Mikailenko <benjamin.mikailenko@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

Resets happen with or without user interaction. For example, incidents
such as TX hang or a reconfiguration of parameters will result in a reset.
During reset, hardware and software statistics were set to zero. This
created an issue for the user where a reset happens in the background,
statistics set to zero, and the user checks statistics expecting them to
be populated.

To ensure this doesn't happen, keep accumulating stats over reset.

1. Remove function calls which reset hardware and netdev statistics.
2. Do not rollover statistics in ice_stat_update40 during reset.
Signed-off-by: Benjamin Mikailenko <benjamin.mikailenko@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

The driver is currently using ICE_LINK_SPEED_* defines that mirror what
ethtool.h defines, with one exception ICE_LINK_SPEED_UNKNOWN.

This issue is fixed by the following changes:

1. replace ICE_LINK_SPEED_UNKNOWN with 0 because SPEED_UNKNOWN in
   ethtool.h is "-1" and that doesn't match the driver's expected behavior
2. transform ICE_LINK_SPEED_*MBPS to SPEED_* using static tables and
   fls()-1 to convert from BIT() to an index in a table.
Suggested-by: Alexander Lobakin <alexandr.lobakin@intel.com>
Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Co-developed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

It was observed that PTP HW semaphore can be held for ~50 ms in worst
case.
SW should wait longer and check more frequently if the HW lock is held.
Signed-off-by: Karol Kolacinski <karol.kolacinski@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

In the case of invalid or corrupted v2 counter update packets,
 efx_tc_rx_version_2() returns EFX_TC_COUNTER_TYPE_MAX.  In this case
 we should not attempt to update generation counts as this will write
 beyond the end of the seen_gen array.
Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Addresses-Coverity-ID: 1527356 ("Memory - illegal accesses")
Fixes: 25730d8b ("sfc: add extra RX channel to receive MAE counter updates on ef100")
Signed-off-by: Edward Cree <ecree.xilinx@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Syzkaller triggered flow dissector warning with the following:

r0 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0802, 0x0)
ioctl$PPPIOCNEWUNIT(r0, 0xc004743e, &(0x7f00000000c0))
ioctl$PPPIOCSACTIVE(r0, 0x40107446, &(0x7f0000000240)={0x2, &(0x7f0000000180)=[{0x20, 0x0, 0x0, 0xfffff034}, {0x6}]})
pwritev(r0, &(0x7f0000000040)=[{&(0x7f0000000140)='\x00!', 0x2}], 0x1, 0x0, 0x0)

[    9.485814] WARNING: CPU: 3 PID: 329 at net/core/flow_dissector.c:1016 __skb_flow_dissect+0x1ee0/0x1fa0
[    9.485929]  skb_get_poff+0x53/0xa0
[    9.485937]  bpf_skb_get_pay_offset+0xe/0x20
[    9.485944]  ? ppp_send_frame+0xc2/0x5b0
[    9.485949]  ? _raw_spin_unlock_irqrestore+0x40/0x60
[    9.485958]  ? __ppp_xmit_process+0x7a/0xe0
[    9.485968]  ? ppp_xmit_process+0x5b/0xb0
[    9.485974]  ? ppp_write+0x12a/0x190
[    9.485981]  ? do_iter_write+0x18e/0x2d0
[    9.485987]  ? __import_iovec+0x30/0x130
[    9.485997]  ? do_pwritev+0x1b6/0x240
[    9.486016]  ? trace_hardirqs_on+0x47/0x50
[    9.486023]  ? __x64_sys_pwritev+0x24/0x30
[    9.486026]  ? do_syscall_64+0x3d/0x80
[    9.486031]  ? entry_SYSCALL_64_after_hwframe+0x63/0xcd

Flow dissector tries to find skb net namespace either via device
or via socket. Neigher is set in ppp_send_frame, so let's manually
use ppp->dev.

Cc: Paul Mackerras <paulus@samba.org>
Cc: linux-ppp@vger.kernel.org
Reported-by: syzbot+41cab52ab62ee99ed24a@syzkaller.appspotmail.com
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

kernel test robot reported indentation warnings:

Documentation/networking/devlink/devlink-port.rst:220: WARNING: Unexpected indentation.
Documentation/networking/devlink/devlink-port.rst:222: WARNING: Block quote ends without a blank line; unexpected unindent.

These warnings cause lists (arbitration flow for which the warnings blame to
and 3-step subfunction setup) to be rendered inline instead. Also, for the
former list, automatic list numbering is messed up.

Fix these warnings by adding missing blank line padding.

Link: https://lore.kernel.org/linux-doc/202211200926.kfOPiVti-lkp@intel.com/
Fixes: 242dd643 ("Documentation: Add documentation for new devlink-rate attributes")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Heng Qi says:

====================
Revert "veth: Avoid drop packets when xdp_redirect performs" and its fix

This patch 2e0de636 enables napi of the peer veth automatically when
the veth loads the xdp, but it breaks down as reported by Paolo and John.
So reverting it and its fix, we will rework the patch and make it more
robust based on comments.
====================

Link: https://lore.kernel.org/r/20221122035015.19296-1-hengqi@linux.alibaba.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

This reverts commit 2e0de636.

Based on the issues reported by John and Paolo and their comments,
this patch and the corresponding fix 5e5dc33d are reverted, and
we'll remake it.
Signed-off-by: Heng Qi <hengqi@linux.alibaba.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

This reverts commit 5e5dc33d.

This patch fixes the panic maked by 2e0de636. Now Paolo
and Toke suggest reverting the patch 2e0de636 and making
it stronger, so do this first.
Signed-off-by: Heng Qi <hengqi@linux.alibaba.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Vladimir Oltean says:

====================
Remove dsa_priv.h

After working on the "Autoload DSA tagging driver when dynamically
changing protocol" series:
https://patchwork.kernel.org/project/netdevbpf/cover/20221115011847.2843127-1-vladimir.oltean@nxp.com/

it became clear to me that the situation with DSA headers is a bit
messy, and I put the tagging protocol driver macros in a pretty random
temporary spot in dsa_priv.h.

Now is the time to make the net/dsa/ folder a bit more organized, and to
make tagging protocol driver modules include just headers they're going
to use.

Another thing is the merging and cleanup of dsa.c and dsa2.c. Before,
dsa.c had 589 lines and dsa2.c had 1817 lines. Now, the combined dsa.c
has 1749 lines, the rest went to some other places.

Sorry for the set size, I know the rules, but since this is basically
code movement for the most part, I thought more patches are better.
====================

Link: https://lore.kernel.org/r/20221121135555.1227271-1-vladimir.oltean@nxp.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The last remnants in dsa_priv.h are a netlink-related definition for
which we create a new header, and DSA_MAX_NUM_OFFLOADING_BRIDGES which
is only used from dsa.c, so move it there.

Some inclusions need to be adjusted now that we no longer have headers
included transitively from dsa_priv.h.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

tag_8021q definitions are all over the place. Some are exported to
linux/dsa/8021q.h (visible by DSA core, taggers, switch drivers and
everyone else), and some are in dsa_priv.h.

Move the structures that don't need external visibility into tag_8021q.c,
and the ones which don't need the world or switch drivers to see them
into tag_8021q.h.

We also have the tag_8021q.h inclusion from switch.c, which is basically
the entire reason why tag_8021q.c was built into DSA in commit
8b6e638b ("net: dsa: build tag_8021q.c as part of DSA core").
I still don't know how to better deal with that, so leave it alone.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

There are some definitions in dsa_priv.h which are only used from
slave.c. So move them to slave.c.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The previous change moved the code into the larger file (dsa2.c) to
minimize the delta. Rename that now to dsa.c, and create dsa.h, where
all related definitions from dsa_priv.h go.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

There is no longer a meaningful distinction between what goes into
dsa2.c and what goes into dsa.c. Merge the 2 into a single file.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Reduce bloat in dsa_priv.h by moving the cross-chip notifier data
structures to switch.h.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

There isn't an intuitive place for these 2 cross-chip notifier functions
according to the function-to-file classification based on names
(dsa_switch_*() goes to switch.c), but I consider these to be part of
the cross-chip notifier handling, therefore part of switch.c. Move them
there to reduce bloat in dsa2.c (the place where all code with no better
place to go goes).
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Reduce code bloat in dsa_priv.h by moving the prototypes exported by
switch.h into their own header file.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

It would be nice if tagging protocol drivers could include just the
header they need, since they are (mostly) data path and isolated from
most of the other DSA core code does.

Create a tag.c and a tag.h file which are meant to support tagging
protocol drivers.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Minimize the use of the bloated dsa_priv.h by moving the prototypes
exported by slave.c to their own header file.

This is just approximate to get the code structure right. There are some
interdependencies with static inline code left in dsa_priv.h, so leave
slave.h included from there for now.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Minimize the use of the bloated dsa_priv.h by moving the prototypes
exported by master.c to their own header file.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Minimize the use of the bloated dsa_priv.h by moving the prototypes
exported by port.c to their own header file.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The code that needed further refactoring into dedicated functions in
dsa2.c was left aside. Move it now to devlink.c, and make dsa2.c stop
including net/devlink.h.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Simplify dsa_switch_teardown() to remove the NULL checking for
ds->devlink.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

dsa.c and dsa2.c are bloated with too much off-topic code. Identify all
code related to devlink and move it to a new devlink.c file.

Steer clear of the dsa_priv.h dumping ground antipattern and create a
dedicated devlink.h for it, which will be included only by the C files
which need it. Usage of dsa_priv.h will be minimized in later patches.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

There is no reason that I can see why the no-op tagging protocol should
be registered manually, so make it a module and make all drivers which
have any sort of reference to DSA_TAG_PROTO_NONE select it.

Note that I don't know if ksz_get_tag_protocol() really needs this,
or if it's just the logic which is poorly written. All switches seem to
have their own tagging protocol, and DSA_TAG_PROTO_NONE is just a
fallback that never gets used.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

dsa.o and dsa2.o are linked into the same dsa_core.o, there is no reason
to export this symbol when its only caller is local.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Reporter health_state is set twice to error in devlink_health_report().
Remove second time as it is redundant.
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Eran Ben Elisha <eranbe@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/1668933412-5498-1-git-send-email-moshe@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The cited commit caused the following build break when CONFIG_IPV6 was
disabled

net/ipv4/tcp_input.c: In function ‘tcp_syn_flood_action’:
include/net/sock.h:387:37: error: ‘const struct sock_common’ has no member named ‘skc_v6_rcv_saddr’; did you mean ‘skc_rcv_saddr’?

Fix by using inet6_rcv_saddr() macro which handles this situation
nicely.

Fixes: d9282e48 ("tcp: Add listening address to SYN flood message")
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
CC: Matthieu Baerts <matthieu.baerts@tessares.net>
CC: Jamie Bainbridge <jamie.bainbridge@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20221122184158.170798-1-saeed@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Merge branch 'i2c/client_device_id_helper-immutable' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull in a dependency for an API cleanup:
https://lore.kernel.org/all/20221118224540.619276-1-uwe@kleine-koenig.org/Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Colin Foster says:

====================
cleanup ocelot_stats exposure

The ocelot_stats structures became redundant across all users. Replace
this redundancy with a static const struct. After doing this, several
definitions inside include/soc/mscc/ocelot.h no longer needed to be
shared. Patch 2 removes them.

Checkpatch throws an error for a complicated macro not in parentheses. I
understand the reason for OCELOT_COMMON_STATS was to allow expansion, but
interestingly this patch set is essentially reverting the ability for
expansion. I'm keeping the macro in this set, but am open to remove it,
since it doesn't _actually_ provide any immediate benefits anymore.
====================

Link: https://lore.kernel.org/r/20221119231406.3167852-1-colin.foster@in-advantage.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

Ocelot uses regmap_bulk_read() operations to efficiently read stats
registers. Currently the implementation relies on the stats layout to be
ordered to be most efficient.

Issue a warning if any future implementations happen to break this pattern.
Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
Co-developed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Since commit 4d1d157f ("net: mscc: ocelot: share the common stat
definitions between all drivers") there is no longer a need to share the
stats structures to the world. Relocate these definitions to inside
ocelot_stats.c instead of a global include header.
Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Ever since commit 4d1d157f ("net: mscc: ocelot: share the common stat
definitions between all drivers") the stats_layout entry in ocelot and
felix drivers have become redundant. Remove the unnecessary code.
Suggested-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

The selftests/net does not have proper cross-compilation support, and
does not properly state libbpf as a dependency. Mimic/copy the BPF
build from selftests/bpf, which has the nice side-effect that libbpf
is built as well.
Signed-off-by: Björn Töpel <bjorn@rivosinc.com>
Reviewed-by: Anders Roxell <anders.roxell@linaro.org>
Link: https://lore.kernel.org/r/20221119171841.2014936-1-bjorn@kernel.orgSigned-off-by: Paolo Abeni <pabeni@redhat.com>

The latest version of grep claims the egrep is now obsolete so the build
now contains warnings that look like:
	egrep: warning: egrep is obsolescent; using grep -E
fix this up by moving the related file to use "grep -E" instead.

  sed -i "s/egrep/grep -E/g" `grep egrep -rwl samples/pktgen`

Here are the steps to install the latest grep:

  wget http://ftp.gnu.org/gnu/grep/grep-3.8.tar.gz
  tar xf grep-3.8.tar.gz
  cd grep-3.8 && ./configure && make
  sudo make install
  export PATH=/usr/local/bin:$PATH
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Link: https://lore.kernel.org/r/1668826504-32162-1-git-send-email-yangtiezhu@loongson.cnSigned-off-by: Paolo Abeni <pabeni@redhat.com>

1. If a profile does not support DMAC extraction then avoid installing NPC
flow rules for unicast. Similarly, if LXMB(L2 and L3) extraction is not
supported by the profile then avoid installing broadcast and multicast
rules.
2. Allow MCAM entry insertion for promiscuous mode.
3. For the profiles where DMAC is not extracted in MKEX key default
unicast entry installed by AF is not valid. Hence do not use action
from the AF installed default unicast entry for such cases.
4. Adjacent packet header fields in a packet like IP header source
and destination addresses or UDP/TCP header source port and destination
can be extracted together in MKEX profile. Therefore MKEX profile can be
configured to in two ways:
	a. Total of 4 bytes from start of UDP header(src port
	   + destination port)
	or
	b. Two bytes from start and two bytes from offset 2
Signed-off-by: Suman Ghosh <sumang@marvell.com>
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Link: https://lore.kernel.org/r/20221118053329.2288486-1-sumang@marvell.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

Clear the RGMII_LINK bit upon detecting link down to be consistent with
setting the bit upon link up. We also move the clearing of the
out-of-band disable to the runtime initialization rather than for each
link up/down transition.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20221118213754.1383364-1-f.fainelli@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Smatch complains that "err" can be uninitialized on these paths.  Also
it's just nicer to "return 0;" instead of "return err;"

Fixes: 3a344f99 ("net: microchip: sparx5: Add support for TC flower ARP dissector")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Link: https://lore.kernel.org/r/Y3eg9Ml/LmLR3L3C@kiliSigned-off-by: Jakub Kicinski <kuba@kernel.org>