linux-2.6-microblaze.git
3 years agonet: l3mdev: use obj-$(CONFIG_NET_L3_MASTER_DEV) form in net/Makefile
Masahiro Yamada [Mon, 25 Jan 2021 23:16:58 +0000 (08:16 +0900)]
net: l3mdev: use obj-$(CONFIG_NET_L3_MASTER_DEV) form in net/Makefile

CONFIG_NET_L3_MASTER_DEV is a bool option. Change the ifeq conditional
to the standard obj-$(CONFIG_NET_L3_MASTER_DEV) form.

Use obj-y in net/l3mdev/Makefile because Kbuild visits this Makefile
only when CONFIG_NET_L3_MASTER_DEV=y.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20210125231659.106201-4-masahiroy@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: switchdev: use obj-$(CONFIG_NET_SWITCHDEV) form in net/Makefile
Masahiro Yamada [Mon, 25 Jan 2021 23:16:57 +0000 (08:16 +0900)]
net: switchdev: use obj-$(CONFIG_NET_SWITCHDEV) form in net/Makefile

CONFIG_NET_SWITCHDEV is a bool option. Change the ifeq conditional to
the standard obj-$(CONFIG_NET_SWITCHDEV) form.

Use obj-y in net/switchdev/Makefile because Kbuild visits this Makefile
only when CONFIG_NET_SWITCHDEV=y.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20210125231659.106201-3-masahiroy@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: dcb: use obj-$(CONFIG_DCB) form in net/Makefile
Masahiro Yamada [Mon, 25 Jan 2021 23:16:56 +0000 (08:16 +0900)]
net: dcb: use obj-$(CONFIG_DCB) form in net/Makefile

CONFIG_DCB is a bool option. Change the ifeq conditional to the
standard obj-$(CONFIG_DCB) form.

Use obj-y in net/dcb/Makefile because Kbuild visits this Makefile
only when CONFIG_DCB=y.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20210125231659.106201-2-masahiroy@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: move CONFIG_NET guard to top Makefile
Masahiro Yamada [Mon, 25 Jan 2021 23:16:55 +0000 (08:16 +0900)]
net: move CONFIG_NET guard to top Makefile

When CONFIG_NET is disabled, nothing under the net/ directory is
compiled. Move the CONFIG_NET guard to the top Makefile so the net/
directory is entirely skipped.

When Kbuild visits net/Makefile, CONFIG_NET is obvioulsy 'y' because
CONFIG_NET is a bool option. Clean up net/Makefile.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20210125231659.106201-1-masahiroy@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: sysctl: remove redundant #ifdef CONFIG_NET
Masahiro Yamada [Mon, 25 Jan 2021 23:14:21 +0000 (08:14 +0900)]
net: sysctl: remove redundant #ifdef CONFIG_NET

CONFIG_NET is a bool option, and this file is compiled only when
CONFIG_NET=y.

Remove #ifdef CONFIG_NET, which we know it is always met.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20210125231421.105936-1-masahiroy@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoMerge branch 'mptcp-ipv4-mapped-ipv6-addressing-for-subflows'
Jakub Kicinski [Thu, 28 Jan 2021 00:50:05 +0000 (16:50 -0800)]
Merge branch 'mptcp-ipv4-mapped-ipv6-addressing-for-subflows'

Mat Martineau says:

====================
MPTCP: IPv4-mapped IPv6 addressing for subflows

This patch series from the MPTCP tree adds support for IPv4-mapped IPv6
addressing that was missing when multiple subflows were first
implemented.

Patches 1 and 2 handle the conversion and comparison of the mapped
addresses.

Patch 3 contains a minor refactor in the path manager's handling of
addresses.

Patches 4 and 5 add selftests for the new functionality and adjust the
selftest timeout.
====================

Link: https://lore.kernel.org/r/20210125185904.6997-1-mathew.j.martineau@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoselftests: increase timeout to 10 min
Matthieu Baerts [Mon, 25 Jan 2021 18:59:04 +0000 (10:59 -0800)]
selftests: increase timeout to 10 min

On slow systems with kernel debug settings, we can reach the current
timeout when all tests are executed.

Likely some tests need be improved to remove some 'sleep' and wait
(less) for a specific action. This can also improve stability.

Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoselftests: mptcp: add IPv4-mapped IPv6 testcases
Geliang Tang [Mon, 25 Jan 2021 18:59:03 +0000 (10:59 -0800)]
selftests: mptcp: add IPv4-mapped IPv6 testcases

Here, we make sure we support IPv4-mapped in IPv6 addresses in different
contexts:

- a v4-mapped address is received by the PM and can be used as v4.
- a v4 address is received by the PM and can be used even with a v4
  mapped socket.

We also make sure we don't try to establish subflows between v4 and v6
addresses, e.g. if a real v6 address ends with a valid v4 address.

Co-developed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agomptcp: pm nl: reduce variable scope
Matthieu Baerts [Mon, 25 Jan 2021 18:59:02 +0000 (10:59 -0800)]
mptcp: pm nl: reduce variable scope

To avoid confusions like when working on the previous patch, better to
declare and assign this variable only where it is needed.

Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agomptcp: pm nl: support IPv4 mapped in v6 addresses
Matthieu Baerts [Mon, 25 Jan 2021 18:59:01 +0000 (10:59 -0800)]
mptcp: pm nl: support IPv4 mapped in v6 addresses

On one side, we can allow the creation of subflows between v4 mapped in
v6 and v4 addresses. For that we look for v4mapped addresses between the
local address we want to select and the remote one.

On the other side, we also properly deal with received v4mapped
addresses, either announced ones or set via Netlink.

Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/122
Suggested-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Co-developed-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agomptcp: support MPJoin with IPv4 mapped in v6 sk
Matthieu Baerts [Mon, 25 Jan 2021 18:59:00 +0000 (10:59 -0800)]
mptcp: support MPJoin with IPv4 mapped in v6 sk

With an IPv4 mapped in v6 socket, we were trying to call inet6_bind()
with an IPv4 address resulting in a -EINVAL error because the given
addr_len -- size of the address structure -- was too short.

We now make sure to use address structures for the same family as the
MPTCP socket for both the bind() and the connect(). It means we convert
v4 addresses to v4 mapped in v6 or the opposite if needed.

Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/122
Co-developed-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agor8169: remove not needed call to rtl_wol_enable_rx from rtl_shutdown
Heiner Kallweit [Mon, 25 Jan 2021 16:55:12 +0000 (17:55 +0100)]
r8169: remove not needed call to rtl_wol_enable_rx from rtl_shutdown

rtl_wol_enable_rx() is called via the following call chain if WoL
is enabled:
rtl8169_down()
-> rtl_prepare_power_down()
   -> rtl_wol_enable_rx()
Therefore we don't have to call this function here.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/34ce78e2-596c-e2ac-16aa-c550fa624c22@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agopktgen: fix misuse of BUG_ON() in pktgen_thread_worker()
Di Zhu [Mon, 25 Jan 2021 12:42:29 +0000 (20:42 +0800)]
pktgen: fix misuse of BUG_ON() in pktgen_thread_worker()

pktgen create threads for all online cpus and bond these threads to
relevant cpu repecivtily. when this thread firstly be woken up, it
will compare cpu currently running with the cpu specified at the time
of creation and if the two cpus are not equal, BUG_ON() will take effect
causing panic on the system.
Notice that these threads could be migrated to other cpus before start
running because of the cpu hotplug after these threads have created. so the
BUG_ON() used here seems unreasonable and we can replace it with WARN_ON()
to just printf a warning other than panic the system.

Signed-off-by: Di Zhu <zhudi21@huawei.com>
Link: https://lore.kernel.org/r/20210125124229.19334-1-zhudi21@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: allow user to set metric on default route learned via Router Advertisement
Praveen Chaudhary [Mon, 25 Jan 2021 21:44:30 +0000 (13:44 -0800)]
net: allow user to set metric on default route learned via Router Advertisement

For IPv4, default route is learned via DHCPv4 and user is allowed to change
metric using config etc/network/interfaces. But for IPv6, default route can
be learned via RA, for which, currently a fixed metric value 1024 is used.

Ideally, user should be able to configure metric on default route for IPv6
similar to IPv4. This patch adds sysctl for the same.

Logs:

For IPv4:

Config in etc/network/interfaces:
auto eth0
iface eth0 inet dhcp
    metric 4261413864

IPv4 Kernel Route Table:
$ ip route list
default via 172.21.47.1 dev eth0 metric 4261413864

FRR Table, if a static route is configured:
[In real scenario, it is useful to prefer BGP learned default route over DHCPv4 default route.]
Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, P - PIM, E - EIGRP, N - NHRP,
       T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP,
       > - selected route, * - FIB route

S>* 0.0.0.0/0 [20/0] is directly connected, eth0, 00:00:03
K   0.0.0.0/0 [254/1000] via 172.21.47.1, eth0, 6d08h51m

i.e. User can prefer Default Router learned via Routing Protocol in IPv4.
Similar behavior is not possible for IPv6, without this fix.

After fix [for IPv6]:
sudo sysctl -w net.ipv6.conf.eth0.net.ipv6.conf.eth0.ra_defrtr_metric=1996489705

IP monitor: [When IPv6 RA is received]
default via fe80::xx16:xxxx:feb3:ce8e dev eth0 proto ra metric 1996489705  pref high

Kernel IPv6 routing table
$ ip -6 route list
default via fe80::be16:65ff:feb3:ce8e dev eth0 proto ra metric 1996489705 expires 21sec hoplimit 64 pref high

FRR Table, if a static route is configured:
[In real scenario, it is useful to prefer BGP learned default route over IPv6 RA default route.]
Codes: K - kernel route, C - connected, S - static, R - RIPng,
       O - OSPFv3, I - IS-IS, B - BGP, N - NHRP, T - Table,
       v - VNC, V - VNC-Direct, A - Babel, D - SHARP,
       > - selected route, * - FIB route

S>* ::/0 [20/0] is directly connected, eth0, 00:00:06
K   ::/0 [119/1001] via fe80::xx16:xxxx:feb3:ce8e, eth0, 6d07h43m

If the metric is changed later, the effect will be seen only when next IPv6
RA is received, because the default route must be fully controlled by RA msg.
Below metric is changed from 1996489705 to 1996489704.

$ sudo sysctl -w net.ipv6.conf.eth0.ra_defrtr_metric=1996489704
net.ipv6.conf.eth0.ra_defrtr_metric = 1996489704

IP monitor:
[On next IPv6 RA msg, Kernel deletes prev route and installs new route with updated metric]

Deleted default via fe80::xx16:xxxx:feb3:ce8e dev eth0 proto ra metric 1996489705 expires 3sec hoplimit 64 pref high
default via fe80::xx16:xxxx:feb3:ce8e dev eth0 proto ra metric 1996489704 pref high

Signed-off-by: Praveen Chaudhary <pchaudhary@linkedin.com>
Signed-off-by: Zhenggen Xu <zxu@linkedin.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20210125214430.24079-1-pchaudhary@linkedin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoMerge branch 'net-usbnet-convert-to-new-tasklet-api'
Jakub Kicinski [Wed, 27 Jan 2021 02:04:28 +0000 (18:04 -0800)]
Merge branch 'net-usbnet-convert-to-new-tasklet-api'

Emil Renner Berthing says:

====================
net: usbnet: convert to new tasklet API

This converts the usbnet driver to use the new tasklet API introduced in
commit 12cc923f1ccc ("tasklet: Introduce new initialization API")

It is split into two commits for ease of reviewing.
====================

Link: https://lore.kernel.org/r/20210123173221.5855-1-esmil@mailme.dk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: usbnet: use new tasklet API
Emil Renner Berthing [Sat, 23 Jan 2021 17:32:21 +0000 (18:32 +0100)]
net: usbnet: use new tasklet API

This converts the driver to use the new tasklet API introduced in
commit 12cc923f1ccc ("tasklet: Introduce new initialization API")

Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: usbnet: initialize tasklet using tasklet_init
Emil Renner Berthing [Sat, 23 Jan 2021 17:32:20 +0000 (18:32 +0100)]
net: usbnet: initialize tasklet using tasklet_init

Initialize tasklet using tasklet_init() rather than open-coding it.

Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoMerge branch 'net-dsa-mv88e6xxx-remove-some-6250-specific-methods'
Jakub Kicinski [Wed, 27 Jan 2021 01:58:30 +0000 (17:58 -0800)]
Merge branch 'net-dsa-mv88e6xxx-remove-some-6250-specific-methods'

Rasmus Villemoes says:

====================
net: dsa: mv88e6xxx: remove some 6250-specific methods

v2:
 - resend now that the bug-fix patch (87fe04367d84, "net: dsa:
   mv88e6xxx: also read STU state in mv88e6250_g1_vtu_getnext") is in
   net and also merged to net-next.
 - include various tags in patch 1.
 - add second similar patch for loadpurge.
====================

Link: https://lore.kernel.org/r/20210125150449.115032-1-rasmus.villemoes@prevas.dk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: dsa: mv88e6xxx: use mv88e6185_g1_vtu_loadpurge() for the 6250
Rasmus Villemoes [Mon, 25 Jan 2021 15:04:49 +0000 (16:04 +0100)]
net: dsa: mv88e6xxx: use mv88e6185_g1_vtu_loadpurge() for the 6250

Apart from the mask used to get the high bits of the fid,
mv88e6185_g1_vtu_loadpurge() and mv88e6250_g1_vtu_loadpurge() are
identical. Since the entry->fid passed in should never exceed the
number of databases, we can simply use the former as-is as replacement
for the latter.

Suggested-by: Tobias Waldekranz <tobias@waldekranz.com>
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: dsa: mv88e6xxx: use mv88e6185_g1_vtu_getnext() for the 6250
Rasmus Villemoes [Mon, 25 Jan 2021 15:04:48 +0000 (16:04 +0100)]
net: dsa: mv88e6xxx: use mv88e6185_g1_vtu_getnext() for the 6250

mv88e6250_g1_vtu_getnext is almost identical to
mv88e6185_g1_vtu_getnext, except for the 6250 only having 64 databases
instead of 256. We can reduce code duplication by simply masking off
the extra two garbage bits when assembling the fid from VTU op [3:0]
and [11:8].

Reviewed-by: Tobias Waldekranz <tobias@waldekranz.com>
Tested-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoselftests: add IPv4 unicast extensions tests
Seth David Schoen [Tue, 26 Jan 2021 04:08:34 +0000 (20:08 -0800)]
selftests: add IPv4 unicast extensions tests

Add selftests for kernel behavior with regard to various classes of
unallocated/reserved IPv4 addresses, checking whether or not these
addresses can be assigned as unicast addresses on links and used in
routing.

Expect the current kernel behavior at the time of this patch. That is:

* 0/8 and 240/4 may be used as unicast, with the exceptions of 0.0.0.0
  and 255.255.255.255;
* the lowest address in a subnet may only be used as a broadcast address;
* 127/8 may not be used as unicast (the route_localnet option, which is
  disabled by default, still leaves it treated slightly specially);
* 224/4 may not be used as unicast.

Signed-off-by: Seth David Schoen <schoen@loyalty.org>
Suggested-by: John Gilmore <gnu@toad.com>
Acked-by: Dave Taht <dave.taht@gmail.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20210126040834.GR24989@frotz.zork.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobonding: add TLS dependency
Arnd Bergmann [Mon, 25 Jan 2021 11:31:59 +0000 (12:31 +0100)]
bonding: add TLS dependency

When TLS is a module, the built-in bonding driver may cause a
link error:

x86_64-linux-ld: drivers/net/bonding/bond_main.o: in function `bond_start_xmit':
bond_main.c:(.text+0xc451): undefined reference to `tls_validate_xmit_skb'

Add a dependency to avoid the problem.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20210125113209.2248522-1-arnd@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobnxt_en: Convert to use netif_level() helpers.
Michael Chan [Tue, 26 Jan 2021 06:20:24 +0000 (01:20 -0500)]
bnxt_en: Convert to use netif_level() helpers.

Use the various netif_level() helpers to simplify the C code.  This was
suggested by Joe Perches.

Cc: Joe Perches <joe@perches.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/1611642024-3166-1-git-send-email-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agousbnet: fix the indentation of one code snippet
Dongliang Mu [Sat, 23 Jan 2021 05:11:02 +0000 (13:11 +0800)]
usbnet: fix the indentation of one code snippet

Every line of code should start with tab (8 characters)

Signed-off-by: Dongliang Mu <mudongliangabcd@gmail.com>
Link: https://lore.kernel.org/r/20210123051102.1091541-1-mudongliangabcd@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: bridge: multicast: fix br_multicast_eht_set_entry_lookup indentation
Nikolay Aleksandrov [Mon, 25 Jan 2021 08:20:40 +0000 (10:20 +0200)]
net: bridge: multicast: fix br_multicast_eht_set_entry_lookup indentation

Fix the messed up indentation in br_multicast_eht_set_entry_lookup().

Fixes: baa74d39ca39 ("net: bridge: multicast: add EHT source set handling functions")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Link: https://lore.kernel.org/r/20210125082040.13022-1-razor@blackwall.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonfc: fix typo
wengjianfeng [Sat, 23 Jan 2021 08:25:50 +0000 (16:25 +0800)]
nfc: fix typo

change 'regster' to 'register'

Signed-off-by: wengjianfeng <wengjianfeng@yulong.com>
Acked-by: Mark Greer <mgreer@animalcreek.com>
Link: https://lore.kernel.org/r/20210123082550.3748-1-samirweng1979@163.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonfc: fdp: fix typo issue
wengjianfeng [Sat, 23 Jan 2021 07:48:35 +0000 (15:48 +0800)]
nfc: fdp: fix typo issue

change 'paquet' to 'packet'

Signed-off-by: wengjianfeng <wengjianfeng@yulong.com>
Link: https://lore.kernel.org/r/20210123074835.9448-1-samirweng1979@163.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoMerge branch 'bnxt_en-error-recovery-improvements'
Jakub Kicinski [Tue, 26 Jan 2021 03:20:06 +0000 (19:20 -0800)]
Merge branch 'bnxt_en-error-recovery-improvements'

Michael Chan says:

====================
bnxt_en: Error recovery improvements.

This series contains a number of improvements in the area of error
recovery.  Most error recovery scenarios are tightly coordinated with
the firmware.  A number of patches add retry logic to establish
connection with the firmware if there are indications that the
firmware is still alive and will likely transition back to the
normal state.  Some patches speed up the recovery process and make
it more reliable.  There are some cleanup patches as well.
====================

Link: https://lore.kernel.org/r/1611558501-11022-1-git-send-email-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobnxt_en: Do not process completion entries after fatal condition detected.
Michael Chan [Mon, 25 Jan 2021 07:08:21 +0000 (02:08 -0500)]
bnxt_en: Do not process completion entries after fatal condition detected.

Once the firmware fatal condition is detected, we should cease
comminication with the firmware and hardware quickly even if there
are many completion entries in the completion rings.  This will
speed up the recovery process and prevent further I/Os that may
cause further exceptions.

Do not proceed in the NAPI poll function if fatal condition is
detected.  Call napi_complete() and return without arming interrupts.
Cleanup of all rings and reset are imminent.

Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Reviewed-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobnxt_en: Consolidate firmware reset event logging.
Michael Chan [Mon, 25 Jan 2021 07:08:20 +0000 (02:08 -0500)]
bnxt_en: Consolidate firmware reset event logging.

Combine the three netdev_warn() calls into a single call, printed at
the NETIF_MSG_HW log level.

Reviewed-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobnxt_en: Improve firmware fatal error shutdown sequence.
Michael Chan [Mon, 25 Jan 2021 07:08:19 +0000 (02:08 -0500)]
bnxt_en: Improve firmware fatal error shutdown sequence.

In the event of a fatal firmware error, firmware will notify the host
and then it will proceed to do core reset when it sees that all functions
have disabled Bus Master.  To prevent Master Aborts and other hard
errors, we need to quiesce all activities in addition to disabling Bus
Master before the chip goes into core reset.

Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Reviewed-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobnxt_en: Modify bnxt_disable_int_sync() to be called more than once.
Michael Chan [Mon, 25 Jan 2021 07:08:18 +0000 (02:08 -0500)]
bnxt_en: Modify bnxt_disable_int_sync() to be called more than once.

In the event of a fatal firmware error, we want to disable IRQ early
in the recovery sequence.  This change will allow it to be called
safely again as part of the normal shutdown sequence.

Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Reviewed-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobnxt_en: Add a new BNXT_STATE_NAPI_DISABLED flag to keep track of NAPI state.
Michael Chan [Mon, 25 Jan 2021 07:08:17 +0000 (02:08 -0500)]
bnxt_en: Add a new BNXT_STATE_NAPI_DISABLED flag to keep track of NAPI state.

Up until now, we don't need to keep track of this state because NAPI
is always enabled once and disabled once during bring up and shutdown.
For better error recovery in subsequent patches, we want to quiesce
the device earlier during fatal error conditions.  The normal shutdown
sequence will disable NAPI again and the flag will prevent disabling
NAPI twice.

Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Reviewed-by: Andy Gospodarek <gospo@broadcom.com>
Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Reviewed-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobnxt_en: Add bnxt_fw_reset_timeout() helper.
Michael Chan [Mon, 25 Jan 2021 07:08:16 +0000 (02:08 -0500)]
bnxt_en: Add bnxt_fw_reset_timeout() helper.

This code to check if we have reached the maximum wait time after
firmware reset is used multiple times.  Add a helper function to
do this.

Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobnxt_en: Retry open if firmware is in reset.
Vasundhara Volam [Mon, 25 Jan 2021 07:08:15 +0000 (02:08 -0500)]
bnxt_en: Retry open if firmware is in reset.

Firmware may be in the middle of reset when the driver tries to do ifup.
In that case, firmware will return a special error code and the driver
will retry 10 times with 50 msecs delay after each retry.

Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobnxt_en: attempt to reinitialize after aborted reset
Edwin Peer [Mon, 25 Jan 2021 07:08:14 +0000 (02:08 -0500)]
bnxt_en: attempt to reinitialize after aborted reset

Drawing a hard line on aborted resets prevents a NIC open in
some scenarios that may otherwise be recoverable. For example,
if a firmware recovery happened while a PF was down and an
attempt was made to bring up an associated VF in this state,
then it was impossible to ever bring up this VF without a
rebind or reload of its driver.

Attempt to reinitialize the firmware when an aborted reset (or
failed init after a reset) is discovered during open - it may
succeed. Also take care to allow the user to retry opening the
NIC even after an aborted reset.

Signed-off-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobnxt_en: log firmware debug notifications
Edwin Peer [Mon, 25 Jan 2021 07:08:13 +0000 (02:08 -0500)]
bnxt_en: log firmware debug notifications

Firmware is capable of generating asynchronous debug notifications.
The event data is opaque to the driver and is simply logged. Debug
notifications can be enabled by turning on hardware status messages
using the ethtool msglvl interface.

Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobnxt_en: Add an upper bound for all firmware command timeouts.
Vasundhara Volam [Mon, 25 Jan 2021 07:08:12 +0000 (02:08 -0500)]
bnxt_en: Add an upper bound for all firmware command timeouts.

The timeout period for firmware messages is passed to the driver
from the firmware in the response of the first command.  This
timeout period is multiplied by a factor for certain long
running commands such as NVRAM commands.  In some cases, the
timeout period can become really long and it can cause hung task
warnings if firmware has crashed or is not responding.  To avoid
such long delays, cap all firmware commands to a max timeout value
of 40 seconds.

Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobnxt_en: Move reading VPD info after successful handshake with fw.
Vasundhara Volam [Mon, 25 Jan 2021 07:08:11 +0000 (02:08 -0500)]
bnxt_en: Move reading VPD info after successful handshake with fw.

If firmware is in reset or in bad state, it won't be able to return
VPD data.  Move bnxt_vpd_read_info() until after bnxt_fw_init_one_p1()
successfully returns.  By then we would have established proper
communications with the firmware.

Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobnxt_en: Retry sending the first message to firmware if it is under reset.
Michael Chan [Mon, 25 Jan 2021 07:08:10 +0000 (02:08 -0500)]
bnxt_en: Retry sending the first message to firmware if it is under reset.

The first HWRM_VER_GET message to firmware during probe may timeout if
firmware is under reset.  This can happen during hot-plug for example.
On P5 and newer chips, we can check if firmware is in the boot stage by
reading a status register.  Retry 5 times if the status register shows
that firmware is not ready and not in error state.

Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobnxt_en: handle CRASH_NO_MASTER during bnxt_open()
Edwin Peer [Mon, 25 Jan 2021 07:08:09 +0000 (02:08 -0500)]
bnxt_en: handle CRASH_NO_MASTER during bnxt_open()

Add missing support for handling NO_MASTER crashes while ports are
administratively down (ifdown). On some SoC platforms, the driver
needs to assist the firmware to recover from a crash via OP-TEE.
This is performed in a similar fashion to what is done during driver
probe.

Signed-off-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobnxt_en: Define macros for the various health register states.
Michael Chan [Mon, 25 Jan 2021 07:08:08 +0000 (02:08 -0500)]
bnxt_en: Define macros for the various health register states.

Define macros to check for the various states in the lower 16 bits of
the health register.  Replace the C code that checks for these values
with the newly defined macros.

Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobnxt_en: Update firmware interface to 1.10.2.11.
Michael Chan [Mon, 25 Jan 2021 07:08:07 +0000 (02:08 -0500)]
bnxt_en: Update firmware interface to 1.10.2.11.

Updates to backing store APIs, QoS profiles, and push buffer initial
index support.

Since the new HWRM_FUNC_BACKING_STORE_CFG message size has increased,
we need to add some compat. logic to fall back to the smaller legacy
size if firmware cannot accept the larger message size.  The new fields
added to the structure are not used yet.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoMerge branch 'dsa-add-mt7530-gpio-support'
Jakub Kicinski [Tue, 26 Jan 2021 02:19:05 +0000 (18:19 -0800)]
Merge branch 'dsa-add-mt7530-gpio-support'

DENG Qingfang says:

====================
dsa: add MT7530 GPIO support

MT7530's LED controller can be used as GPIO controller.
Add support for it.
====================

Link: https://lore.kernel.org/r/20210125044322.6280-1-dqfext@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: dsa: mt7530: MT7530 optional GPIO support
DENG Qingfang [Mon, 25 Jan 2021 04:43:22 +0000 (12:43 +0800)]
net: dsa: mt7530: MT7530 optional GPIO support

MT7530's LED controller can drive up to 15 LED/GPIOs.

Add support for GPIO control and allow users to use its GPIOs by
setting gpio-controller property in device tree.

Signed-off-by: DENG Qingfang <dqfext@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agodt-bindings: net: dsa: add MT7530 GPIO controller binding
DENG Qingfang [Mon, 25 Jan 2021 04:43:21 +0000 (12:43 +0800)]
dt-bindings: net: dsa: add MT7530 GPIO controller binding

Add device tree binding to support MT7530 GPIO controller.

Signed-off-by: DENG Qingfang <dqfext@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: ethernet: mediatek: support setting MTU
DENG Qingfang [Mon, 25 Jan 2021 04:20:46 +0000 (12:20 +0800)]
net: ethernet: mediatek: support setting MTU

MT762x HW, except for MT7628, supports frame length up to 2048
(maximum length on GDM), so allow setting MTU up to 2030.

Also set the default frame length to the hardware default 1518.

Signed-off-by: DENG Qingfang <dqfext@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20210125042046.5599-1-dqfext@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agobridge: Use PTR_ERR_OR_ZERO instead if(IS_ERR(...)) + PTR_ERR
Jiapeng Zhong [Mon, 25 Jan 2021 02:39:41 +0000 (10:39 +0800)]
bridge: Use PTR_ERR_OR_ZERO instead if(IS_ERR(...)) + PTR_ERR

coccicheck suggested using PTR_ERR_OR_ZERO() and looking at the code.

Fix the following coccicheck warnings:

./net/bridge/br_multicast.c:1295:7-13: WARNING: PTR_ERR_OR_ZERO can be
used.

Reported-by: Abaci <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Zhong <abaci-bugfix@linux.alibaba.com>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Link: https://lore.kernel.org/r/1611542381-91178-1-git-send-email-abaci-bugfix@linux.alibaba.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoocteontx2-af: Support ESP/AH RSS hashing
Subbaraya Sundeep [Sat, 23 Jan 2021 05:09:12 +0000 (10:39 +0530)]
octeontx2-af: Support ESP/AH RSS hashing

Support SPI and sequence number fields of
ESP/AH header to be hashed for RSS. By default
ESP/AH fields are not considered for RSS and
needs to be set explicitly as below:
ethtool -U eth0 rx-flow-hash esp4 sdfn
or
ethtool -U eth0 rx-flow-hash ah4 sdfn
or
ethtool -U eth0 rx-flow-hash esp6 sdfn
or
ethtool -U eth0 rx-flow-hash ah6 sdfn

To disable hashing of ESP fields:
ethtool -U eth0 rx-flow-hash esp4 sd
or
ethtool -U eth0 rx-flow-hash ah4 sd
or
ethtool -U eth0 rx-flow-hash esp6 sd
or
ethtool -U eth0 rx-flow-hash ah6 sd

Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Link: https://lore.kernel.org/r/1611378552-13288-1-git-send-email-sundeep.lkml@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agotg3: improve PCI VPD access
Heiner Kallweit [Fri, 22 Jan 2021 12:08:22 +0000 (13:08 +0100)]
tg3: improve PCI VPD access

When working on the PCI VPD code I also tested with a Broadcom BCM95719
card. tg3 uses internal NVRAM access with this card, so I forced it to
PCI VPD mode for testing. PCI VPD access fails
(i + PCI_VPD_LRDT_TAG_SIZE + j > len) because only TG3_NVM_VPD_LEN (256)
bytes are read, but PCI VPD has 400 bytes on this card.

So add a constant TG3_NVM_PCI_VPD_MAX_LEN that defines the maximum
PCI VPD size. The actual VPD size is returned by pci_read_vpd().
In addition it's not worth looping over pci_read_vpd(). If we miss the
125ms timeout per VPD dword read then definitely something is wrong,
and if the tg3 module loading is killed then there's also not much
benefit in retrying the VPD read.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/cb9e9113-0861-3904-87e0-d4c4ab3c8860@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoMerge branch 'net-dsa-hellcreek-add-taprio-offloading'
Jakub Kicinski [Sun, 24 Jan 2021 05:25:17 +0000 (21:25 -0800)]
Merge branch 'net-dsa-hellcreek-add-taprio-offloading'

Kurt Kanzenbach says:

====================
net: dsa: hellcreek: Add TAPRIO offloading

The switch has support for the 802.1Qbv Time Aware Shaper (TAS). Traffic
schedules may be configured individually on each front port. Each port
has eight egress queues. The traffic is mapped to a traffic class
respectively via the PCP field of a VLAN tagged frame.

Previous attempts:
 * https://lkml.kernel.org/netdev/20201121115703.23221-1-kurt@linutronix.de/
 * https://lkml.kernel.org/netdev/20210116124922.32356-1-kurt@linutronix.de/
====================

Link: https://lore.kernel.org/r/20210123105633.16753-1-kurt@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: dsa: hellcreek: Add TAPRIO offloading support
Kurt Kanzenbach [Sat, 23 Jan 2021 10:56:33 +0000 (11:56 +0100)]
net: dsa: hellcreek: Add TAPRIO offloading support

The switch has support for the 802.1Qbv Time Aware Shaper (TAS). Traffic
schedules may be configured individually on each front port. Each port has eight
egress queues. The traffic is mapped to a traffic class respectively via the PCP
field of a VLAN tagged frame.

The TAPRIO Qdisc already implements that. Therefore, this interface can simply
be reused. Add .port_setup_tc() accordingly.

The activation of a schedule on a port is split into two parts:

 * Programming the necessary gate control list (GCL)
 * Setup delayed work for starting the schedule

The hardware supports starting a schedule up to eight seconds in the future. The
TAPRIO interface provides an absolute base time. Therefore, periodic delayed
work is leveraged to check whether a schedule may be started or not.

Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: mhi: Set wwan device type
Loic Poulain [Fri, 22 Jan 2021 15:15:54 +0000 (16:15 +0100)]
net: mhi: Set wwan device type

The 'wwan' devtype is meant for devices that require additional
configuration to be used, like WWAN specific APN setup over AT/QMI
commands, rmnet link creation, etc. This is the case for MHI (Modem
host Interface) netdev which targets modem/WWAN endpoints.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Link: https://lore.kernel.org/r/1611328554-1414-1-git-send-email-loic.poulain@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoMerge branch 'udp-allow-forwarding-of-plain-non-fraglisted-udp-gro-packets'
Jakub Kicinski [Sun, 24 Jan 2021 04:16:26 +0000 (20:16 -0800)]
Merge branch 'udp-allow-forwarding-of-plain-non-fraglisted-udp-gro-packets'

Alexander Lobakin says:

====================
udp: allow forwarding of plain (non-fraglisted) UDP GRO packets

This series allows to form UDP GRO packets in cases without sockets
(for forwarding). To not change the current datapath, this is
performed only when the new corresponding netdev feature is enabled
via Ethtool (and fraglisted GRO is disabled).
Prior to this point, only fraglisted UDP GRO was available. Plain UDP
GRO shows better forwarding performance when a target NIC is capable
of GSO UDP offload.

Since v3 [2]:
 - rename introduced netdev feature to reflect that it targets
   forwarding and don't touch fraglisted GRO at all (Willem de Bruijn).

Since v2 [1]:
 - convert to a series;
 - new: add new netdev_feature to explicitly enable/disable UDP GRO
   when there is no socket, defaults to off (Paolo Abeni).

Since v1 [0]:
 - drop redundant 'if (sk)' check (Alexander Duyck);
 - add a ref in the commit message to one more commit that was
   an important step for UDP GRO forwarding.

[0] https://lore.kernel.org/netdev/20210112211536.261172-1-alobakin@pm.me
[1] https://lore.kernel.org/netdev/20210113103232.4761-1-alobakin@pm.me
[2] https://lore.kernel.org/netdev/20210118193122.87271-1-alobakin@pm.me
====================

Link: https://lore.kernel.org/r/20210122181909.36340-1-alobakin@pm.me
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoudp: allow forwarding of plain (non-fraglisted) UDP GRO packets
Alexander Lobakin [Fri, 22 Jan 2021 18:20:02 +0000 (18:20 +0000)]
udp: allow forwarding of plain (non-fraglisted) UDP GRO packets

Commit 9fd1ff5d2ac7 ("udp: Support UDP fraglist GRO/GSO.") actually
not only added a support for fraglisted UDP GRO, but also tweaked
some logics the way that non-fraglisted UDP GRO started to work for
forwarding too.
Commit 2e4ef10f5850 ("net: add GSO UDP L4 and GSO fraglists to the
list of software-backed types") added GSO UDP L4 to the list of
software GSO to allow virtual netdevs to forward them as is up to
the real drivers.

Tests showed that currently forwarding and NATing of plain UDP GRO
packets are performed fully correctly, regardless if the target
netdevice has a support for hardware/driver GSO UDP L4 or not.
Add the last element and allow to form plain UDP GRO packets if
we are on forwarding path, and the new NETIF_F_GRO_UDP_FWD is
enabled on a receiving netdevice.

If both NETIF_F_GRO_FRAGLIST and NETIF_F_GRO_UDP_FWD are set,
fraglisted GRO takes precedence. This keeps the current behaviour
and is generally more optimal for now, as the number of NICs with
hardware USO offload is relatively small.

Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: introduce a netdev feature for UDP GRO forwarding
Alexander Lobakin [Fri, 22 Jan 2021 18:19:48 +0000 (18:19 +0000)]
net: introduce a netdev feature for UDP GRO forwarding

Introduce a new netdev feature, NETIF_F_GRO_UDP_FWD, to allow user
to turn UDP GRO on and off for forwarding.
Defaults to off to not change current datapath.

Suggested-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Alexander Lobakin <alobakin@pm.me>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoMerge branch 'remove-unneeded-phy-time-stamping-option'
Jakub Kicinski [Sat, 23 Jan 2021 21:21:39 +0000 (13:21 -0800)]
Merge branch 'remove-unneeded-phy-time-stamping-option'

Richard Cochran says:

====================
Remove unneeded PHY time stamping option.

The NETWORK_PHY_TIMESTAMPING configuration option adds additional
checks into the networking hot path, and it is only needed by two
rather esoteric devices, namely the TI DP83640 PHYTER and the ZHAW
InES 1588 IP core.  Very few end users have these devices, and those
that do have them are building specialized embedded systems.

Unfortunately two unrelated drivers depend on this option, and two
defconfigs enable it.  It is probably my fault for not paying enough
attention in reviews.

This series corrects the gratuitous use of NETWORK_PHY_TIMESTAMPING.
====================

Link: https://lore.kernel.org/r/cover.1611198584.git.richardcochran@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: mvpp2: Remove unneeded Kconfig dependency.
Richard Cochran [Thu, 21 Jan 2021 04:06:01 +0000 (20:06 -0800)]
net: mvpp2: Remove unneeded Kconfig dependency.

The mvpp2 is an Ethernet driver, and it implements MAC style time
stamping of PTP frames.  It has no need of the expensive option to
enable PHY time stamping.  Remove the incorrect dependency.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: dsa: mv88e6xxx: Remove bogus Kconfig dependency.
Richard Cochran [Thu, 21 Jan 2021 04:06:00 +0000 (20:06 -0800)]
net: dsa: mv88e6xxx: Remove bogus Kconfig dependency.

The mv88e6xxx is a DSA driver, and it implements DSA style time
stamping of PTP frames.  It has no need of the expensive option to
enable PHY time stamping.  Remove the bogus dependency.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
Acked-by: Brandon Streiff <brandon.streiff@ni.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoMerge branch 'net-ipa-napi-poll-updates'
Jakub Kicinski [Sat, 23 Jan 2021 21:16:02 +0000 (13:16 -0800)]
Merge branch 'net-ipa-napi-poll-updates'

Alex Elder says:

====================
net: ipa: NAPI poll updates

While reviewing the IPA NAPI polling code in detail I found two
problems.  This series fixes those, and implements a few other
improvements to this part of the code.

The first two patches are minor bug fixes that avoid extra passes
through the poll function.  The third simplifies code inside the
polling loop a bit.

The last two update how interrupts are disabled; previously it was
possible for another I/O completion condition to be recorded before
NAPI got scheduled.
====================

Link: https://lore.kernel.org/r/20210121114821.26495-1-elder@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: ipa: disable IEOB interrupts before clearing
Alex Elder [Thu, 21 Jan 2021 11:48:21 +0000 (05:48 -0600)]
net: ipa: disable IEOB interrupts before clearing

Currently in gsi_isr_ieob(), event ring IEOB interrupts are disabled
one at a time.  The loop disables the IEOB interrupt for all event
rings represented in the event mask.  Instead, just disable them all
at once.

Disable them all *before* clearing the interrupt condition.  This
guarantees we'll schedule NAPI for each event once, before another
IEOB interrupt could be signaled.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: ipa: repurpose gsi_irq_ieob_disable()
Alex Elder [Thu, 21 Jan 2021 11:48:20 +0000 (05:48 -0600)]
net: ipa: repurpose gsi_irq_ieob_disable()

Rename gsi_irq_ieob_disable() to be gsi_irq_ieob_disable_one().

Introduce a new function gsi_irq_ieob_disable() that takes a mask of
events to disable rather than a single event id.  This will be used
in the next patch.

Rename gsi_irq_ieob_enable() to be gsi_irq_ieob_enable_one() to be
consistent.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: ipa: have gsi_channel_update() return a value
Alex Elder [Thu, 21 Jan 2021 11:48:19 +0000 (05:48 -0600)]
net: ipa: have gsi_channel_update() return a value

Have gsi_channel_update() return the first transaction in the
updated completed transaction list, or NULL if no new transactions
have been added.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: ipa: heed napi_complete() return value
Alex Elder [Thu, 21 Jan 2021 11:48:18 +0000 (05:48 -0600)]
net: ipa: heed napi_complete() return value

Pay attention to the return value of napi_complete(), completing
polling only if it returns true.

Just use napi rather than &channel->napi as the argument passed to
napi_complete().

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: ipa: count actual work done in gsi_channel_poll()
Alex Elder [Thu, 21 Jan 2021 11:48:17 +0000 (05:48 -0600)]
net: ipa: count actual work done in gsi_channel_poll()

There is an off-by-one problem in gsi_channel_poll().  The count of
transactions completed is incremented each time through the loop
*before* determining whether there is any more work to do.  As a
result, if we exit the loop early the counter its value is one more
than the number of transactions actually processed.

Instead, increment the count after processing, to ensure it reflects
the number of processed transactions.  The result is more naturally
described as a for loop rather than a while loop, so change that.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoMerge branch 'mlxsw-expose-number-of-physical-ports'
Jakub Kicinski [Sat, 23 Jan 2021 04:42:15 +0000 (20:42 -0800)]
Merge branch 'mlxsw-expose-number-of-physical-ports'

Ido Schimmel says:

====================
mlxsw: Expose number of physical ports

The switch ASIC has a limited capacity of physical ports that it can
support. While each system is brought up with a different number of
ports, this number can be increased via splitting up to the ASIC's
limit.

Expose physical ports as a devlink resource so that user space will have
visibility into the maximum number of ports that can be supported and
the current occupancy. With this resource it is possible, for example,
to write generic (i.e., not platform dependent) tests for port
splitting.

Patch #1 adds the new resource and patch #2 adds a selftest.

v2:
* Add the physical ports resource as a generic devlink resource so that
  it could be re-used by other device drivers
====================

Link: https://lore.kernel.org/r/20210121131024.2656154-1-idosch@idosch.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoselftests: mlxsw: Add a scale test for physical ports
Danielle Ratson [Thu, 21 Jan 2021 13:10:24 +0000 (15:10 +0200)]
selftests: mlxsw: Add a scale test for physical ports

Query the maximum number of supported physical ports using devlink-resource
and test that this number can be reached by splitting each of the
splittable ports to its width. Test that an error is returned in case
the maximum number is exceeded.

Signed-off-by: Danielle Ratson <danieller@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agomlxsw: Register physical ports as a devlink resource
Danielle Ratson [Thu, 21 Jan 2021 13:10:23 +0000 (15:10 +0200)]
mlxsw: Register physical ports as a devlink resource

The switch ASIC has a limited capacity of physical ('flavour physical'
in devlink terminology) ports that it can support. While each system is
brought up with a different number of ports, this number can be
increased via splitting up to the ASIC's limit.

Expose physical ports as a devlink resource so that user space will have
visibility to the maximum number of ports that can be supported and the
current occupancy.

In addition, add a "Generic Resources" section in devlink-resource
documentation so the different drivers will be aligned by the same resource
name when exposing to user space.

Signed-off-by: Danielle Ratson <danieller@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoMerge branch 'htb-offload'
Jakub Kicinski [Sat, 23 Jan 2021 04:41:31 +0000 (20:41 -0800)]
Merge branch 'htb-offload'

Maxim Mikityanskiy says:

====================
HTB offload

This series adds support for HTB offload to the HTB qdisc, and adds
usage to mlx5 driver.

The previous RFCs are available at [1], [2].

The feature is intended to solve the performance bottleneck caused by
the single lock of the HTB qdisc, which prevents it from scaling well.
The HTB algorithm itself is offloaded to the device, eliminating the
need to take the root lock of HTB on every packet. Classification part
is done in clsact (still in software) to avoid acquiring the lock, which
imposes a limitation that filters can target only leaf classes.

The speedup on Mellanox ConnectX-6 Dx was 14.2 times in the UDP
multi-stream test, compared to software HTB implementation (more details
in the mlx5 patch).

[1]: https://www.spinics.net/lists/netdev/msg628422.html
[2]: https://www.spinics.net/lists/netdev/msg663548.html

v2 changes:

Fixed sparse and smatch warnings. Formatted HTB patches to 80 chars per
line.

v3 changes:

Fixed the CI failure on parisc with 16-bit xchg by replacing it with
WRITE_ONCE. Fixed the capability bits in mlx5_ifc.h and the value of
MLX5E_QOS_MAX_LEAF_NODES.

v4 changes:

Check if HTB is root when offloading. Add extack for hardware errors.
Rephrase explanations of how it works in the commit message. Remove %hu
from format strings. Add resiliency when leaf_del_last fails to create a
new leaf node.
====================

Link: https://lore.kernel.org/r/20210119120815.463334-1-maximmi@mellanox.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet/mlx5e: Support HTB offload
Maxim Mikityanskiy [Tue, 19 Jan 2021 12:08:15 +0000 (14:08 +0200)]
net/mlx5e: Support HTB offload

This commit adds support for HTB offload in the mlx5e driver.

Performance:

  NIC: Mellanox ConnectX-6 Dx
  CPU: Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz (24 cores with HT)

  100 Gbit/s line rate, 500 UDP streams @ ~200 Mbit/s each
  48 traffic classes, flower used for steering
  No shaping (rate limits set to 4 Gbit/s per TC) - checking for max
  throughput.

  Baseline: 98.7 Gbps, 8.25 Mpps
  HTB: 6.7 Gbps, 0.56 Mpps
  HTB offload: 95.6 Gbps, 8.00 Mpps

Limitations:

1. 256 leaf nodes, 3 levels of depth.

2. Granularity for ceil is 1 Mbit/s. Rates are converted to weights, and
the bandwidth is split among the siblings according to these weights.
Other parameters for classes are not supported.

Ethtool statistics support for QoS SQs are also added. The counters are
called qos_txN_*, where N is the QoS queue number (starting from 0, the
numeration is separate from the normal SQs), and * is the counter name
(the counters are the same as for the normal SQs).

Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agosch_htb: Stats for offloaded HTB
Maxim Mikityanskiy [Tue, 19 Jan 2021 12:08:14 +0000 (14:08 +0200)]
sch_htb: Stats for offloaded HTB

This commit adds support for statistics of offloaded HTB. Bytes and
packets counters for leaf and inner nodes are supported, the values are
taken from per-queue qdiscs, and the numbers that the user sees should
have the same behavior as the software (non-offloaded) HTB.

Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agosch_htb: Hierarchical QoS hardware offload
Maxim Mikityanskiy [Tue, 19 Jan 2021 12:08:13 +0000 (14:08 +0200)]
sch_htb: Hierarchical QoS hardware offload

HTB doesn't scale well because of contention on a single lock, and it
also consumes CPU. This patch adds support for offloading HTB to
hardware that supports hierarchical rate limiting.

In the offload mode, HTB passes control commands to the driver using
ndo_setup_tc. The driver has to replicate the whole hierarchy of classes
and their settings (rate, ceil) in the NIC. Every modification of the
HTB tree caused by the admin results in ndo_setup_tc being called.

After this setup, the HTB algorithm is done completely in the NIC. An SQ
(send queue) is created for every leaf class and attached to the
hierarchy, so that the NIC can calculate and obey aggregated rate
limits, too. In the future, it can be changed, so that multiple SQs will
back a single leaf class.

ndo_select_queue is responsible for selecting the right queue that
serves the traffic class of each packet.

The data path works as follows: a packet is classified by clsact, the
driver selects a hardware queue according to its class, and the packet
is enqueued into this queue's qdisc.

This solution addresses two main problems of scaling HTB:

1. Contention by flow classification. Currently the filters are attached
to the HTB instance as follows:

    # tc filter add dev eth0 parent 1:0 protocol ip flower dst_port 80
    classid 1:10

It's possible to move classification to clsact egress hook, which is
thread-safe and lock-free:

    # tc filter add dev eth0 egress protocol ip flower dst_port 80
    action skbedit priority 1:10

This way classification still happens in software, but the lock
contention is eliminated, and it happens before selecting the TX queue,
allowing the driver to translate the class to the corresponding hardware
queue in ndo_select_queue.

Note that this is already compatible with non-offloaded HTB and doesn't
require changes to the kernel nor iproute2.

2. Contention by handling packets. HTB is not multi-queue, it attaches
to a whole net device, and handling of all packets takes the same lock.
When HTB is offloaded, it registers itself as a multi-queue qdisc,
similarly to mq: HTB is attached to the netdev, and each queue has its
own qdisc.

Some features of HTB may be not supported by some particular hardware,
for example, the maximum number of classes may be limited, the
granularity of rate and ceil parameters may be different, etc. - so, the
offload is not enabled by default, a new parameter is used to enable it:

    # tc qdisc replace dev eth0 root handle 1: htb offload

Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: sched: Add extack to Qdisc_class_ops.delete
Maxim Mikityanskiy [Tue, 19 Jan 2021 12:08:12 +0000 (14:08 +0200)]
net: sched: Add extack to Qdisc_class_ops.delete

In a following commit, sch_htb will start using extack in the delete
class operation to pass hardware errors in offload mode. This commit
prepares for that by adding the extack parameter to this callback and
converting usage of the existing qdiscs.

Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: sched: Add multi-queue support to sch_tree_lock
Maxim Mikityanskiy [Tue, 19 Jan 2021 12:08:11 +0000 (14:08 +0200)]
net: sched: Add multi-queue support to sch_tree_lock

The existing qdiscs that set TCQ_F_MQROOT don't use sch_tree_lock.
However, hardware-offloaded HTB will start setting this flag while also
using sch_tree_lock.

The current implementation of sch_tree_lock basically locks on
qdisc->dev_queue->qdisc, and it works fine when the tree is attached to
some queue. However, it's not the case for MQROOT qdiscs: such a qdisc
is the root itself, and its dev_queue just points to queue 0, while not
actually being used, because there are real per-queue qdiscs.

This patch changes the logic of sch_tree_lock and sch_tree_unlock to
lock the qdisc itself if it's the MQROOT.

Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoMerge branch 'tcp-add-cmsg-rx-timestamps-to-rx-zerocopy'
Jakub Kicinski [Sat, 23 Jan 2021 04:05:58 +0000 (20:05 -0800)]
Merge branch 'tcp-add-cmsg-rx-timestamps-to-rx-zerocopy'

Arjun Roy says:

====================
tcp: add CMSG+rx timestamps to rx. zerocopy

Provide CMSG and receive timestamp support to TCP
receive zerocopy. Patch 1 refactors CMSG pending state for
tcp_recvmsg() to avoid the use of magic numbers; patch 2 implements
receive timestamp via CMSG support for receive zerocopy, and uses the
constants added in patch 1.
====================

Link: https://lore.kernel.org/r/20210121004148.2340206-1-arjunroy.kdev@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agotcp: Add receive timestamp support for receive zerocopy.
Arjun Roy [Thu, 21 Jan 2021 00:41:48 +0000 (16:41 -0800)]
tcp: Add receive timestamp support for receive zerocopy.

tcp_recvmsg() uses the CMSG mechanism to receive control information
like packet receive timestamps. This patch adds CMSG fields to
struct tcp_zerocopy_receive, and provides receive timestamps
if available to the user.

Signed-off-by: Arjun Roy <arjunroy@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agotcp: Remove CMSG magic numbers for tcp_recvmsg().
Arjun Roy [Thu, 21 Jan 2021 00:41:47 +0000 (16:41 -0800)]
tcp: Remove CMSG magic numbers for tcp_recvmsg().

At present, tcp_recvmsg() uses flags to track if any CMSGs are pending
and what those CMSGs are. These flags are currently magic numbers,
used only within tcp_recvmsg().

To prepare for receive timestamp support in tcp receive zerocopy,
gently refactor these magic numbers into enums.

Signed-off-by: Arjun Roy <arjunroy@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoMerge branch 'net-bridge-multicast-add-initial-eht-support'
Jakub Kicinski [Sat, 23 Jan 2021 03:39:59 +0000 (19:39 -0800)]
Merge branch 'net-bridge-multicast-add-initial-eht-support'

Nikolay Aleksandrov says:

====================
net: bridge: multicast: add initial EHT support

This set adds explicit host tracking support for IGMPv3/MLDv2. The
already present per-port fast leave flag is used to enable it since that
is the primary goal of EHT, to track a group and its S,Gs usage per-host
and when left without any interested hosts delete them before the standard
timers. The EHT code is pretty self-contained and not enabled by default.
There is no new uAPI added, all of the functionality is currently hidden
behind the fast leave flag. In the future that will change (more below).
The host tracking uses two new sets per port group: one having an entry for
each host which contains that host's view of the group (source list and
filter mode), and one set which contains an entry for each source having
an internal set which contains an entry for each host that has reported
an interest for that source. RB trees are used for all sets so they're
compact when not used and fast when we need to do lookups.
To illustrate it:
 [ bridge port group ]
  ` [ host set (rb) ]
   ` [ host entry with a list of sources and filter mode ]
  ` [ source set (rb) ]
   ` [ source entry ]
    ` [ source host set (rb) ]
     ` [ source host entry with a timer ]

The number of tracked sources per host is limited to the maximum total
number of S,G entries per port group - PG_SRC_ENT_LIMIT (currently 32).
The number of hosts is unlimited, I think the argument that a local
attacker can exhaust the memory/cause high CPU usage can be applied to
fdb entries as well which are unlimited. In the future if needed we can
add an option to limit these, but I don't think it's necessary for a
start. All of the new sets are protected by the bridge's multicast lock.
I'm pretty sure we'll be changing the cases and improving the
convergence time in the future, but this seems like a good start.

Patch breakdown:
 patch 1 -  4: minor cleanups and preparations for EHT
 patch      5: adds the new structures which will be used in the
               following patches
 patch      6: adds support to create, destroy and lookup host entries
 patch      7: adds support to create, delete and lokup source set entries
 patch      8: adds a host "delete" function which is just a host's
               source list flush since that would automatically delete
               the host
 patch 9 - 10: add support for handling all IGMPv3/MLDv2 report types
               more information can be found in the individual patches
 patch     11: optmizes a specific TO_INCLUDE use-case with host timeouts
 patch     12: handles per-host filter mode changing (include <-> exclude)
 patch     13: pulls out block group deletion since now it can be
               deleted in both filter modes
 patch     14: marks deletions done due to fast leave

Future plans:
 - export host information
 - add an option to reduce queries
 - add an option to limit the number of host entries
 - tune more fast leave cases for quicker convergence

By the way I think this is the first open-source EHT implementation, I
couldn't find any while researching it. :)
====================

Link: https://lore.kernel.org/r/20210120145203.1109140-1-razor@blackwall.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: bridge: multicast: mark IGMPv3/MLDv2 fast-leave deletes
Nikolay Aleksandrov [Wed, 20 Jan 2021 14:52:03 +0000 (16:52 +0200)]
net: bridge: multicast: mark IGMPv3/MLDv2 fast-leave deletes

Mark groups which were deleted due to fast leave/EHT.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: bridge: multicast: handle block pg delete for all cases
Nikolay Aleksandrov [Wed, 20 Jan 2021 14:52:02 +0000 (16:52 +0200)]
net: bridge: multicast: handle block pg delete for all cases

A block report can result in empty source and host sets for both include
and exclude groups so if there are no hosts left we can safely remove
the group. Pull the block group handling so it can cover both cases and
add a check if EHT requires the delete.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: bridge: multicast: add EHT host filter_mode handling
Nikolay Aleksandrov [Wed, 20 Jan 2021 14:52:01 +0000 (16:52 +0200)]
net: bridge: multicast: add EHT host filter_mode handling

We should be able to handle host filter mode changing. For exclude mode
we must create a zero-src entry so the group will be kept even without
any S,G entries (non-zero source sets). That entry doesn't count to the
entry limit and can always be created, its timer is refreshed on new
exclude reports and if we change the host filter mode to include then it
gets removed and we rely only on the non-zero source sets.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: bridge: multicast: optimize TO_INCLUDE EHT timeouts
Nikolay Aleksandrov [Wed, 20 Jan 2021 14:52:00 +0000 (16:52 +0200)]
net: bridge: multicast: optimize TO_INCLUDE EHT timeouts

This is an optimization specifically for TO_INCLUDE which sends queries
for the older entries and thus lowers the S,G timers to LMQT. If we have
the following situation for a group in either include or exclude mode:
 - host A was interested in srcs X and Y, but is timing out
 - host B sends TO_INCLUDE src Z, the bridge lowers X and Y's timeouts
   to LMQT
 - host B sends BLOCK src Z after LMQT time has passed
 => since host B is the last host we can delete the group, but if we
    still have host A's EHT entries for X and Y (i.e. if they weren't
    lowered to LMQT previously) then we'll have to wait another LMQT
    time before deleting the group, with this optimization we can
    directly remove it regardless of the group mode as there are no more
    interested hosts

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: bridge: multicast: add EHT include and exclude handling
Nikolay Aleksandrov [Wed, 20 Jan 2021 14:51:59 +0000 (16:51 +0200)]
net: bridge: multicast: add EHT include and exclude handling

Add support for IGMPv3/MLDv2 include and exclude EHT handling. Similar to
how the reports are processed we have 2 cases when the group is in include
or exclude mode, these are processed as follows:
 - group include
  - is_include: create missing entries
  - to_include: flush existing entries and create a new set from the
    report, obviously if the src set is empty then we delete the group

 - group exclude
  - is_exclude: create missing entries
  - to_exclude: flush existing entries and create a new set from the
    report, any empty source set entries are removed

If the group is in a different mode then we just flush all entries reported
by the host and we create a new set with the new mode entries created from
the report. If the report is include type, the source list is empty and
the group has empty sources' set then we remove it. Any source set entries
which are empty are removed as well. If the group is in exclude mode it
can exist without any S,G entries (allowing for all traffic to pass).

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: bridge: multicast: add EHT allow/block handling
Nikolay Aleksandrov [Wed, 20 Jan 2021 14:51:58 +0000 (16:51 +0200)]
net: bridge: multicast: add EHT allow/block handling

Add support for IGMPv3/MLDv2 allow/block EHT handling. Similar to how
the reports are processed we have 2 cases when the group is in include
or exclude mode, these are processed as follows:
 - group include
  - allow: create missing entries
  - block: remove existing matching entries and remove the corresponding
    S,G entries if there are no more set host entries, then possibly
    delete the whole group if there are no more S,G entries

 - group exclude
  - allow
    - host include: create missing entries
    - host exclude: remove existing matching entries and remove the
      corresponding S,G entries if there are no more set host entries
  - block
    - host include: remove existing matching entries and remove the
      corresponding S,G entries if there are no more set host entries,
      then possibly delete the whole group if there are no more S,G entries
    - host exclude: create missing entries

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: bridge: multicast: add EHT host delete function
Nikolay Aleksandrov [Wed, 20 Jan 2021 14:51:57 +0000 (16:51 +0200)]
net: bridge: multicast: add EHT host delete function

Now that we can delete set entries, we can use that to remove EHT hosts.
Since the group's host set entries exist only when there are related
source set entries we just have to flush all source set entries
joined by the host set entry and it will be automatically removed.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: bridge: multicast: add EHT source set handling functions
Nikolay Aleksandrov [Wed, 20 Jan 2021 14:51:56 +0000 (16:51 +0200)]
net: bridge: multicast: add EHT source set handling functions

Add EHT source set and set-entry create, delete and lookup functions.
These allow to manipulate source sets which contain their own host sets
with entries which joined that S,G. We're limiting the maximum number of
tracked S,G entries per host to PG_SRC_ENT_LIMIT (currently 32) which is
the current maximum of S,G entries for a group. There's a per-set timer
which will be used to destroy the whole set later.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: bridge: multicast: add EHT host handling functions
Nikolay Aleksandrov [Wed, 20 Jan 2021 14:51:55 +0000 (16:51 +0200)]
net: bridge: multicast: add EHT host handling functions

Add functions to create, destroy and lookup an EHT host. These are
per-host entries contained in the eht_host_tree in net_bridge_port_group
which are used to store a list of all sources (S,G) entries joined for that
group by each host, the host's current filter mode and total number of
joined entries.
No functional changes yet, these would be used in later patches.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: bridge: multicast: add EHT structures and definitions
Nikolay Aleksandrov [Wed, 20 Jan 2021 14:51:54 +0000 (16:51 +0200)]
net: bridge: multicast: add EHT structures and definitions

Add EHT structures for tracking hosts and sources per group. We keep one
set for each host which has all of the host's S,G entries, and one set for
each multicast source which has all hosts that have joined that S,G. For
each host, source entry we record the filter_mode and we keep an expiry
timer. There is also one global expiry timer per source set, it is
updated with each set entry update, it will be later used to lower the
set's timer instead of lowering each entry's timer separately.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: bridge: multicast: calculate idx position without changing ptr
Nikolay Aleksandrov [Wed, 20 Jan 2021 14:51:53 +0000 (16:51 +0200)]
net: bridge: multicast: calculate idx position without changing ptr

We need to preserve the srcs pointer since we'll be passing it for EHT
handling later.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: bridge: multicast: __grp_src_block_incl can modify pg
Nikolay Aleksandrov [Wed, 20 Jan 2021 14:51:52 +0000 (16:51 +0200)]
net: bridge: multicast: __grp_src_block_incl can modify pg

Prepare __grp_src_block_incl() for being able to cause a notification
due to changes. Currently it cannot happen, but EHT would change that
since we'll be deleting sources immediately. Make sure that if the pg is
deleted we don't return true as that would cause the caller to access
freed pg. This patch shouldn't cause any functional change.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: bridge: multicast: pass host src address to IGMPv3/MLDv2 functions
Nikolay Aleksandrov [Wed, 20 Jan 2021 14:51:51 +0000 (16:51 +0200)]
net: bridge: multicast: pass host src address to IGMPv3/MLDv2 functions

We need to pass the host address so later it can be used for explicit
host tracking. No functional change.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: bridge: multicast: rename src_size to addr_size
Nikolay Aleksandrov [Wed, 20 Jan 2021 14:51:50 +0000 (16:51 +0200)]
net: bridge: multicast: rename src_size to addr_size

Rename src_size argument to addr_size in preparation for passing host
address as an argument to IGMPv3/MLDv2 functions.
No functional change.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agonet: hns3: replace skb->csum_not_inet with skb_csum_is_sctp
Xin Long [Fri, 22 Jan 2021 09:31:01 +0000 (17:31 +0800)]
net: hns3: replace skb->csum_not_inet with skb_csum_is_sctp

Commit fa8211701043 ("net: add inline function skb_csum_is_sctp")
missed replacing skb->csum_not_inet check in hns3. This patch is
to replace it with skb_csum_is_sctp().

Reported-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Link: https://lore.kernel.org/r/3ad3c22c08beb0947f5978e790bd98d2aa063df9.1611307861.git.lucien.xin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agoMerge branch 'mptcp-re-enable-sndbuf-autotune'
Jakub Kicinski [Sat, 23 Jan 2021 03:21:18 +0000 (19:21 -0800)]
Merge branch 'mptcp-re-enable-sndbuf-autotune'

Paolo Abeni says:

====================
mptcp: re-enable sndbuf autotune

The sendbuffer autotuning was unintentionally disabled as a
side effect of the recent workqueue removal refactor. These
patches re-enable id, with some extra care: with autotuning
enable/large send buffer we need a more accurate packet
scheduler to be able to use efficiently the available
subflow bandwidth, especially when the subflows have
different capacities.

The first patch cleans-up subflow socket handling, making
the actual re-enable (patch 2) simpler.

Patches 3 and 4 improve the packet scheduler, to better cope
with non trivial scenarios and large send buffer.

Finally patch 5 adds and uses some infrastructure to avoid
the workqueue usage for the packet scheduler operations introduced
by the previous patches.
====================

Link: https://lore.kernel.org/r/cover.1611153172.git.pabeni@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agomptcp: implement delegated actions
Paolo Abeni [Wed, 20 Jan 2021 14:39:14 +0000 (15:39 +0100)]
mptcp: implement delegated actions

On MPTCP-level ack reception, the packet scheduler
may select a subflow other then the current one.

Prior to this commit we rely on the workqueue to trigger
action on such subflow.

This changeset introduces an infrastructure that allows
any MPTCP subflow to schedule actions (MPTCP xmit) on
others subflows without resorting to (multiple) process
reschedule.

A dummy NAPI instance is used instead. When MPTCP needs to
trigger action an a different subflow, it enqueues the target
subflow on the NAPI backlog and schedule such instance as needed.

The dummy NAPI poll method walks the sockets backlog and tries
to acquire the (BH) socket lock on each of them. If the socket
is owned by the user space, the action will be completed by
the sock release cb, otherwise push is started.

This change leverages the delegated action infrastructure
to avoid invoking the MPTCP worker to spool the pending data,
when the packet scheduler picks a subflow other then the one
currently processing the incoming MPTCP-level ack.

Additionally we further refine the subflow selection
invoking the packet scheduler for each chunk of data
even inside __mptcp_subflow_push_pending().

v1 -> v2:
 - fix possible UaF at shutdown time, resetting sock ops
   after removing the ulp context

Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agomptcp: schedule work for better snd subflow selection
Paolo Abeni [Wed, 20 Jan 2021 14:39:13 +0000 (15:39 +0100)]
mptcp: schedule work for better snd subflow selection

Otherwise the packet scheduler policy will not be
enforced when pushing pending data at MPTCP-level
ack reception time.

Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agomptcp: do not queue excessive data on subflows
Paolo Abeni [Wed, 20 Jan 2021 14:39:12 +0000 (15:39 +0100)]
mptcp: do not queue excessive data on subflows

The current packet scheduler can enqueue up to sndbuf
data on each subflow. If the send buffer is large and
the subflows are not symmetric, this could lead to
suboptimal aggregate bandwidth utilization.

Limit the amount of queued data to the maximum send
window.

Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agomptcp: re-enable sndbuf autotune
Paolo Abeni [Wed, 20 Jan 2021 14:39:11 +0000 (15:39 +0100)]
mptcp: re-enable sndbuf autotune

After commit 6e628cd3a8f7 ("mptcp: use mptcp release_cb for
delayed tasks"), MPTCP never sets the flag bit SOCK_NOSPACE
on its subflow. As a side effect, autotune never takes place,
as it happens inside tcp_new_space(), which in turn is called
only when the mentioned bit is set.

Let's sendmsg() set the subflows NOSPACE bit when looking for
more memory and use the subflow write_space callback to propagate
the snd buf update and wake-up the user-space.

Additionally, this allows dropping a bunch of duplicate code and
makes the SNDBUF_LIMITED chrono relevant again for MPTCP subflows.

Fixes: 6e628cd3a8f7 ("mptcp: use mptcp release_cb for delayed tasks")
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agomptcp: always graft subflow socket to parent
Paolo Abeni [Wed, 20 Jan 2021 14:39:10 +0000 (15:39 +0100)]
mptcp: always graft subflow socket to parent

Currently, incoming subflows link to the parent socket,
while outgoing ones link to a per subflow socket. The latter
is not really needed, except at the initial connect() time and
for the first subflow.

Always graft the outgoing subflow to the parent socket and
free the unneeded ones early.

This allows some code cleanup, reduces the amount of memory
used and will simplify the next patch

Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
3 years agosfc: reduce the number of requested xdp ev queues
Ivan Babrou [Wed, 20 Jan 2021 21:27:59 +0000 (13:27 -0800)]
sfc: reduce the number of requested xdp ev queues

Without this change the driver tries to allocate too many queues,
breaching the number of available msi-x interrupts on machines
with many logical cpus and default adapter settings:

Insufficient resources for 12 XDP event queues (24 other channels, max 32)

Which in turn triggers EINVAL on XDP processing:

sfc 0000:86:00.0 ext0: XDP TX failed (-22)

Signed-off-by: Ivan Babrou <ivan@cloudflare.com>
Acked-by: Edward Cree <ecree.xilinx@gmail.com>
Link: https://lore.kernel.org/r/20210120212759.81548-1-ivan@cloudflare.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>