platform/kernel/linux-rpi.git
2 years agoice: Use int for ice_status
Tony Nguyen [Thu, 7 Oct 2021 22:56:57 +0000 (15:56 -0700)]
ice: Use int for ice_status

To prepare for removal of ice_status, change the variables from
ice_status to int. This eases the transition when values are changed to
return standard int error codes over enum ice_status.

Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
2 years agoice: Remove string printing for ice_status
Tony Nguyen [Thu, 7 Oct 2021 22:56:02 +0000 (15:56 -0700)]
ice: Remove string printing for ice_status

Remove the ice_stat_str() function which prints the string
representation of the ice_status error code. With upcoming changes
moving away from ice_status, there will be no need for this function.

Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
2 years agoice: Refactor status flow for DDP load
Wojciech Drewek [Thu, 7 Oct 2021 22:54:37 +0000 (15:54 -0700)]
ice: Refactor status flow for DDP load

Before this change, final state of the DDP pkg load process was
dependent on many variables such as: ice_status, pkg version,
ice_aq_err. The last one had be stored in hw->pkg_dwnld_status.
It was impossible to conclude this state just from ice_status, that's
why logging process of DDP pkg load in the caller was a little bit
complicated.

With this patch new status enum is introduced - ice_ddp_state.
It covers all the possible final states of the loading process.
What's tricky for ice_ddp_state is that not only
ICE_DDP_PKG_SUCCESS(=0) means that load was successful. Actually
three states mean that:
 - ICE_DDP_PKG_SUCCESS
 - ICE_DDP_PKG_SAME_VERSION_ALREADY_LOADED
 - ICE_DDP_PKG_COMPATIBLE_ALREADY_LOADED
ice_is_init_pkg_successful can tell that information.

One ddp_state should not be used outside of ice_init_pkg which is
ICE_DDP_PKG_ALREADY_LOADED. It is more generic, it is used in
ice_dwnld_cfg_bufs to see if pkg is already loaded. At this point
we can't use one of the specific one (SAME_VERSION, COMPATIBLE,
NOT_SUPPORTED) because we don't have information on the package
currently loaded in HW (we are before calling ice_get_pkg_info).

We can get rid of hw->pkg_dwnld_status because we are immediately
mapping aq errors to ice_ddp_state in ice_dwnld_cfg_bufs.

Other errors like ICE_ERR_NO_MEMORY, ICE_ERR_PARAM are mapped the
generic ICE_DDP_PKG_ERR.

Suggested-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Wojciech Drewek <wojciech.drewek@intel.com>
Tested-by: Tony Brelinski <tony.brelinski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoice: Refactor promiscuous functions
Brett Creeley [Tue, 2 Mar 2021 18:15:34 +0000 (10:15 -0800)]
ice: Refactor promiscuous functions

Some of the promiscuous mode functions take a boolean to indicate
set/clear, which affects readability. Refactor and provide an
interface for the promiscuous mode code with explicit set and clear
promiscuous mode operations.

Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoice: refactor PTYPE validating
Jeff Guo [Fri, 16 Jul 2021 22:16:43 +0000 (15:16 -0700)]
ice: refactor PTYPE validating

Since the capability of a PTYPE within a specific package could be
negotiated by checking the HW bit map, it means that there's no need
to maintain a different PTYPE list for each type of the package when
parsing PTYPE. So refactor the PTYPE validating mechanism.

Signed-off-by: Jeff Guo <jia.guo@intel.com>
Tested-by: Tony Brelinski <tony.brelinski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoice: Add package PTYPE enable information
Haiyue Wang [Fri, 16 Jul 2021 22:16:42 +0000 (15:16 -0700)]
ice: Add package PTYPE enable information

Scan the 'Marker Ptype TCAM' section to retrieve the Rx parser PTYPE
enable information from the current package.

Signed-off-by: Haiyue Wang <haiyue.wang@intel.com>
Tested-by: Tony Brelinski <tony.brelinski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
2 years agoibmvnic: remove unused defines
Dany Madden [Tue, 14 Dec 2021 05:17:48 +0000 (00:17 -0500)]
ibmvnic: remove unused defines

IBMVNIC_STATS_TIMEOUT and IBMVNIC_INIT_FAILED are not used in the driver.
Remove them.

Suggested-by: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
Signed-off-by: Dany Madden <drt@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoibmvnic: Update driver return codes
Dany Madden [Tue, 14 Dec 2021 05:17:47 +0000 (00:17 -0500)]
ibmvnic: Update driver return codes

Update return codes to be more informative.

Signed-off-by: Jacob Root <otis@otisroot.com>
Signed-off-by: Dany Madden <drt@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoRevert "pktgen: use min() to make code cleaner"
David S. Miller [Tue, 14 Dec 2021 12:53:41 +0000 (12:53 +0000)]
Revert "pktgen: use min() to make code cleaner"

This reverts commit 13510fef48a3803d9ee8f044b015dacfb06fe0f5.

Causes build warnings.

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agopktgen: use min() to make code cleaner
Changcheng Deng [Tue, 14 Dec 2021 11:44:47 +0000 (11:44 +0000)]
pktgen: use min() to make code cleaner

Use min() in order to make code cleaner. Issue found by coccinelle.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Changcheng Deng <deng.changcheng@zte.com.cn>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'dsa-fixups'
David S. Miller [Tue, 14 Dec 2021 12:45:16 +0000 (12:45 +0000)]
Merge branch 'dsa-fixups'

Vladimir Oltean says:

====================
DSA tagger-owned storage fixups

It seems that the DSA tagger-owned storage changes were insufficiently
tested and do not work in all cases. Specifically, the NXP Bluebox 3
(arch/arm64/boot/dts/freescale/fsl-lx2160a-bluebox3.dts) got broken by
these changes, because
(a) I forgot that DSA_TAG_PROTO_SJA1110 exists and differs from
    DSA_TAG_PROTO_SJA1105
(b) the Bluebox 3 uses a DSA switch tree with 2 switches, and the
    tagger-owned storage patches don't cover that use case well, it
    seems

Therefore, I'm sorry to say that there needs to be an API fixup: tagging
protocol drivers will from now on connect to individual switches from a
tree, rather than to the tree as a whole. This is more robust against
various ordering constraints in the DSA probe and teardown paths, and is
also symmetrical with the connection API exposed to the switch drivers
themselves, which is also per switch.

With these changes, the Bluebox 3 also works fine.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: make tagging protocols connect to individual switches from a tree
Vladimir Oltean [Tue, 14 Dec 2021 01:45:36 +0000 (03:45 +0200)]
net: dsa: make tagging protocols connect to individual switches from a tree

On the NXP Bluebox 3 board which uses a multi-switch setup with sja1105,
the mechanism through which the tagger connects to the switch tree is
broken, due to improper DSA code design. At the time when tag_ops->connect()
is called in dsa_port_parse_cpu(), DSA hasn't finished "touching" all
the ports, so it doesn't know how large the tree is and how many ports
it has. It has just seen the first CPU port by this time. As a result,
this function will call the tagger's ->connect method too early, and the
tagger will connect only to the first switch from the tree.

This could be perhaps addressed a bit more simply by just moving the
tag_ops->connect(dst) call a bit later (for example in dsa_tree_setup),
but there is already a design inconsistency at present: on the switch
side, the notification is on a per-switch basis, but on the tagger side,
it is on a per-tree basis. Furthermore, the persistent storage itself is
per switch (ds->tagger_data). And the tagger connect and disconnect
procedures (at least the ones that exist currently) could see a fair bit
of simplification if they didn't have to iterate through the switches of
a tree.

To fix the issue, this change transforms tag_ops->connect(dst) into
tag_ops->connect(ds) and moves it somewhere where we already iterate
over all switches of a tree. That is in dsa_switch_setup_tag_protocol(),
which is a good placement because we already have there the connection
call to the switch side of things.

As for the dsa_tree_bind_tag_proto() method (called from the code path
that changes the tag protocol), things are a bit more complicated
because we receive the tree as argument, yet when we unwind on errors,
it would be nice to not call tag_ops->disconnect(ds) where we didn't
previously call tag_ops->connect(ds). We didn't have this problem before
because the tag_ops connection operations passed the entire dst before,
and this is more fine grained now. To solve the error rewind case using
the new API, we have to create yet one more cross-chip notifier for
disconnection, and stay connected with the old tag protocol to all the
switches in the tree until we've succeeded to connect with the new one
as well. So if something fails half way, the whole tree is still
connected to the old tagger. But there may still be leaks if the tagger
fails to connect to the 2nd out of 3 switches in a tree: somebody needs
to tell the tagger to disconnect from the first switch. Nothing comes
for free, and this was previously handled privately by the tagging
protocol driver before, but now we need to emit a disconnect cross-chip
notifier for that, because DSA has to take care of the unwind path. We
assume that the tagging protocol has connected to a switch if it has set
ds->tagger_data to something, otherwise we avoid calling its
disconnection method in the error rewind path.

The rest of the changes are in the tagging protocol drivers, and have to
do with the replacement of dst with ds. The iteration is removed and the
error unwind path is simplified, as mentioned above.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: sja1105: fix broken connection with the sja1110 tagger
Vladimir Oltean [Tue, 14 Dec 2021 01:45:35 +0000 (03:45 +0200)]
net: dsa: sja1105: fix broken connection with the sja1110 tagger

The driver was incorrectly converted assuming that "sja1105" is the only
tagger supported by this driver. This results in SJA1110 switches
failing to probe:

sja1105 spi1.0: Unable to connect to tag protocol "sja1110": -EPROTONOSUPPORT
sja1105: probe of spi1.2 failed with error -93

Add DSA_TAG_PROTO_SJA1110 to the list of supported taggers by the
sja1105 driver. The sja1105_tagger_data structure format is common for
the two tagging protocols.

Fixes: c79e84866d2a ("net: dsa: tag_sja1105: convert to tagger-owned data")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: tag_sja1105: fix zeroization of ds->priv on tag proto disconnect
Vladimir Oltean [Tue, 14 Dec 2021 01:45:34 +0000 (03:45 +0200)]
net: dsa: tag_sja1105: fix zeroization of ds->priv on tag proto disconnect

The method was meant to zeroize ds->tagger_data but got the wrong
pointer. Fix this.

Fixes: c79e84866d2a ("net: dsa: tag_sja1105: convert to tagger-owned data")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agobareudp: Add extack support to bareudp_configure()
Guillaume Nault [Mon, 13 Dec 2021 18:17:17 +0000 (19:17 +0100)]
bareudp: Add extack support to bareudp_configure()

Add missing extacks for common configuration errors.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoethtool: fix null-ptr-deref on ref tracker
Jakub Kicinski [Tue, 14 Dec 2021 01:39:02 +0000 (17:39 -0800)]
ethtool: fix null-ptr-deref on ref tracker

dev can be a NULL here, not all requests set require_dev.

Fixes: e4b8954074f6 ("netlink: add net device refcount tracker to struct ethnl_req_info")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dev: Change the order of the arguments for the contended condition.
Sebastian Andrzej Siewior [Mon, 13 Dec 2021 16:29:31 +0000 (17:29 +0100)]
net: dev: Change the order of the arguments for the contended condition.

Change the order of arguments and make qdisc_is_running() appear first.
This is more readable for the general case.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'hwtstamp_bonding'
David S. Miller [Tue, 14 Dec 2021 12:28:25 +0000 (12:28 +0000)]
Merge branch 'hwtstamp_bonding'

Hangbin Liu says:

====================
net: add new hwtstamp flag HWTSTAMP_FLAG_BONDED_PHC_INDEX

This patchset add a new hwtstamp_config flag HWTSTAMP_FLAG_BONDED_PHC_INDEX.
When user want to get bond active interface's PHC, they need to add this flag
and aware the PHC index may changed.

v3: Use bitwise test to check the flags validation
v2: rename the flag to HWTSTAMP_FLAG_BONDED_PHC_INDEX
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoBonding: force user to add HWTSTAMP_FLAG_BONDED_PHC_INDEX when get/set HWTSTAMP
Hangbin Liu [Fri, 10 Dec 2021 08:59:59 +0000 (16:59 +0800)]
Bonding: force user to add HWTSTAMP_FLAG_BONDED_PHC_INDEX when get/set HWTSTAMP

When there is a failover, the PHC index of bond active interface will be
changed. This may break the user space program if the author didn't aware.

By setting this flag, the user should aware that the PHC index get/set
by syscall is not stable. And the user space is able to deal with it.
Without this flag, the kernel will reject the request forwarding to
bonding.

Reported-by: Jakub Kicinski <kuba@kernel.org>
Fixes: 94dd016ae538 ("bond: pass get_ts_info and SIOC[SG]HWTSTAMP ioctl to active device")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet_tstamp: add new flag HWTSTAMP_FLAG_BONDED_PHC_INDEX
Hangbin Liu [Fri, 10 Dec 2021 08:59:58 +0000 (16:59 +0800)]
net_tstamp: add new flag HWTSTAMP_FLAG_BONDED_PHC_INDEX

Since commit 94dd016ae538 ("bond: pass get_ts_info and SIOC[SG]HWTSTAMP
ioctl to active device") the user could get bond active interface's
PHC index directly. But when there is a failover, the bond active
interface will change, thus the PHC index is also changed. This may
break the user's program if they did not update the PHC timely.

This patch adds a new hwtstamp_config flag HWTSTAMP_FLAG_BONDED_PHC_INDEX.
When the user wants to get the bond active interface's PHC, they need to
add this flag and be aware the PHC index may be changed.

With the new flag. All flag checks in current drivers are removed. Only
the checking in net_hwtstamp_validate() is kept.

Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: mtk_eth: add COMPILE_TEST support
Lorenzo Bianconi [Mon, 13 Dec 2021 11:23:22 +0000 (12:23 +0100)]
net: mtk_eth: add COMPILE_TEST support

Improve the build testing of mtk_eth drivers by enabling them when
COMPILE_TEST is selected. Moreover COMPILE_TEST will be useful
for the driver development.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dev: Always serialize on Qdisc::busylock in __dev_xmit_skb() on PREEMPT_RT.
Sebastian Andrzej Siewior [Mon, 13 Dec 2021 10:53:29 +0000 (11:53 +0100)]
net: dev: Always serialize on Qdisc::busylock in __dev_xmit_skb() on PREEMPT_RT.

The root-lock is dropped before dev_hard_start_xmit() is invoked and after
setting the __QDISC___STATE_RUNNING bit. If the Qdisc owner is preempted
by another sender/task with a higher priority then this new sender won't
be able to submit packets to the NIC directly instead they will be
enqueued into the Qdisc. The NIC will remain idle until the Qdisc owner
is scheduled again and finishes the job.

By serializing every task on the ->busylock then the task will be
preempted by a sender only after the Qdisc has no owner.

Always serialize on the busylock on PREEMPT_RT.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agomt76: remove variable set but not used
Yang Li [Mon, 13 Dec 2021 09:54:13 +0000 (17:54 +0800)]
mt76: remove variable set but not used

The code that uses variable queued has been removed,
and "mt76_is_usb(dev) ? q->ndesc - q->queued : q->queued"
didn't do anything, so all they should be removed as well.

Eliminate the following clang warnings:
drivers/net/wireless/mediatek/mt76/debugfs.c:77:9: warning: variable
‘queued’ set but not used.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Fixes: 2d8be76c1674 ("mt76: debugfs: improve queue node readability")
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: bonding: debug: avoid printing debug logs when bond is not notifying peers
Suresh Kumar [Mon, 13 Dec 2021 05:47:09 +0000 (11:17 +0530)]
net: bonding: debug: avoid printing debug logs when bond is not notifying peers

Currently "bond_should_notify_peers: slave ..." messages are printed whenever
"bond_should_notify_peers" function is called.

+++
Dec 12 12:33:26 node1 kernel: bond0: bond_should_notify_peers: slave enp0s25
Dec 12 12:33:26 node1 kernel: bond0: bond_should_notify_peers: slave enp0s25
Dec 12 12:33:26 node1 kernel: bond0: bond_should_notify_peers: slave enp0s25
Dec 12 12:33:26 node1 kernel: bond0: (slave enp0s25): Received LACPDU on port 1
Dec 12 12:33:26 node1 kernel: bond0: (slave enp0s25): Rx Machine: Port=1, Last State=6, Curr State=6
Dec 12 12:33:26 node1 kernel: bond0: (slave enp0s25): partner sync=1
Dec 12 12:33:26 node1 kernel: bond0: bond_should_notify_peers: slave enp0s25
Dec 12 12:33:26 node1 kernel: bond0: bond_should_notify_peers: slave enp0s25
Dec 12 12:33:26 node1 kernel: bond0: bond_should_notify_peers: slave enp0s25
...
Dec 12 12:33:30 node1 kernel: bond0: bond_should_notify_peers: slave enp0s25
Dec 12 12:33:30 node1 kernel: bond0: bond_should_notify_peers: slave enp0s25
Dec 12 12:33:30 node1 kernel: bond0: (slave enp4s3): Received LACPDU on port 2
Dec 12 12:33:30 node1 kernel: bond0: (slave enp4s3): Rx Machine: Port=2, Last State=6, Curr State=6
Dec 12 12:33:30 node1 kernel: bond0: (slave enp4s3): partner sync=1
Dec 12 12:33:30 node1 kernel: bond0: bond_should_notify_peers: slave enp0s25
Dec 12 12:33:30 node1 kernel: bond0: bond_should_notify_peers: slave enp0s25
Dec 12 12:33:30 node1 kernel: bond0: bond_should_notify_peers: slave enp0s25
+++

This is confusing and can also clutter up debug logs.
Print logs only when the peer notification happens.

Signed-off-by: Suresh Kumar <suresh2514@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ocelot: use dma_unmap_addr to get tx buffer dma_addr
Clément Léger [Mon, 13 Dec 2021 08:26:51 +0000 (09:26 +0100)]
net: ocelot: use dma_unmap_addr to get tx buffer dma_addr

dma_addr was declared using DEFINE_DMA_UNMAP_ADDR() which requires to
use dma_unmap_addr() to access it.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 753a026cfec1 ("net: ocelot: add FDMA support")
Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: lan966x: Fix the configuration of the pcs
Horatiu Vultur [Sat, 11 Dec 2021 21:44:20 +0000 (22:44 +0100)]
net: lan966x: Fix the configuration of the pcs

When inserting a SFP that runs at 2.5G, then the Serdes was still
configured to run at 1G. Because the config->speed was 0, and then the
speed of the serdes was not configured at all, it was using the default
value which is 1G. This patch stop calling the serdes function set_speed
and allow the serdes to figure out the speed based on the interface
type.

Fixes: d28d6d2e37d10d ("net: lan966x: add port module support")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoselftests/net: expand gro with two machine test
Willem de Bruijn [Sat, 11 Dec 2021 20:04:57 +0000 (15:04 -0500)]
selftests/net: expand gro with two machine test

The test is currently run on a single host with private addresses,
either over veth or by setting a nic in loopback mode with macvlan.

Support running between two real devices. Allow overriding addresses.

Also cut timeout to fail faster on error and explicitly log success.

Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'mse102x-support'
David S. Miller [Mon, 13 Dec 2021 14:15:41 +0000 (14:15 +0000)]
Merge branch 'mse102x-support'

Stefan Wahren says:

====================
add Vertexcom MSE102x support

This patch series adds support for the Vertexcom MSE102x Homeplug GreenPHY
chips [1]. They can be connected either via RGMII, RMII or SPI to a host CPU.
These patches handles only the last one, with an Ethernet over SPI protocol
driver.

The code has been tested only on Raspberry Pi boards, but should work
on other platforms.

Changes in V3:
- drop IF_PORT_HOMEPLUG again, since it's actually not used

Changes in V2:
- improve lock handling for RX & TX path
- add new patch to introduce IF_PORT_HOMEPLUG as suggested by Andrew Lunn
- address all the comments by Jakub Kicinski, Andrew Lunn, Kernel test robot

[1] - http://www.vertexcom.com/p_homeplug_plc_en.html
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: vertexcom: Add MSE102x SPI support
Stefan Wahren [Sun, 12 Dec 2021 14:50:27 +0000 (15:50 +0100)]
net: vertexcom: Add MSE102x SPI support

This implements an SPI protocol driver for Vertexcom MSE102x
Homeplug GreenPHY chip.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agodt-bindings: net: add Vertexcom MSE102x support
Stefan Wahren [Sun, 12 Dec 2021 14:50:26 +0000 (15:50 +0100)]
dt-bindings: net: add Vertexcom MSE102x support

Add devicetree binding for the Vertexcom MSE102x Homeplug GreenPHY chip
as SPI device.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agodt-bindings: add vendor Vertexcom
Stefan Wahren [Sun, 12 Dec 2021 14:50:25 +0000 (15:50 +0100)]
dt-bindings: add vendor Vertexcom

Add vendor prefix for Vertexcom Technologies, Inc [1].

[1] - http://www.vertexcom.com/

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: mvneta: mark as a legacy_pre_march2020 driver
Russell King (Oracle) [Sun, 12 Dec 2021 13:01:21 +0000 (13:01 +0000)]
net: mvneta: mark as a legacy_pre_march2020 driver

mvneta provides mac_an_restart and mac_pcs_get_state methods, so needs
to be marked as a legacy driver. Marek spotted that mvneta had stopped
working in 2500base-X mode - thanks for reporting.

Reported-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: axienet: mark as a legacy_pre_march2020 driver
Russell King (Oracle) [Sun, 12 Dec 2021 13:01:15 +0000 (13:01 +0000)]
net: axienet: mark as a legacy_pre_march2020 driver

axienet has a PCS, but does not make use of the phylink PCS support.
Mark it was a pre-March 2020 driver.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoisdn: cpai: no need to initialise statics to 0
Jason Wang [Sun, 12 Dec 2021 07:12:04 +0000 (15:12 +0800)]
isdn: cpai: no need to initialise statics to 0

Static variables do not need to be initialised to 0, because compiler
will initialise all uninitialised statics to 0. Thus, remove the
unneeded initializations.

Signed-off-by: Jason Wang <wangborong@cdjrlc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: ipa: fix IPA v4.5 interconnect data
Alex Elder [Fri, 10 Dec 2021 22:31:23 +0000 (16:31 -0600)]
net: ipa: fix IPA v4.5 interconnect data

Update the definition of the IPA interconnects for IPA v4.5 so
the path between IPA and system memory is represented by a single
"memory" interconnect.

Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoARM: dts: qcom: sdx55: fix IPA interconnect definitions
Alex Elder [Fri, 10 Dec 2021 22:31:22 +0000 (16:31 -0600)]
ARM: dts: qcom: sdx55: fix IPA interconnect definitions

The first two interconnects defined for IPA on the SDX55 SoC are
really two parts of what should be represented as a single path
between IPA and system memory.

Fix this by combining the "memory-a" and "memory-b" interconnects
into a single "memory" interconnect.

Reported-by: David Heidelberg <david@ixit.cz>
Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: Enable max_dgram_qlen unix sysctl to be configurable by non-init user namespaces
Joanne Koong [Fri, 10 Dec 2021 20:40:23 +0000 (12:40 -0800)]
net: Enable max_dgram_qlen unix sysctl to be configurable by non-init user namespaces

This patch enables the "/proc/sys/net/unix/max_dgram_qlen" sysctl to be
exposed to non-init user namespaces. max_dgram_qlen is used as the default
"sk_max_ack_backlog" value for when a unix socket is created.

Currently, when a networking namespace is initialized, its unix sysctls
are exposed only if the user namespace that "owns" it is the init user
namespace. If there is an non-init user namespace that "owns" a networking
namespace (for example, in the case after we call clone() with both
CLONE_NEWUSER and CLONE_NEWNET set), the sysctls are hidden from view
and not configurable.

Exposing the unix sysctl is safe because any changes made to it will be
limited in scope to the networking namespace the non-init user namespace
"owns" and has privileges over (changes won't affect any other net
namespace). There is also no possibility of a non-privileged user namespace
messing up the net namespace sysctls it shares with its parent user namespace.
When a new user namespace is created without unsharing the network namespace
(eg calling clone()  with CLONE_NEWUSER), the new user namespace shares its
parent's network namespace. Write access is protected by the mode set
in the sysctl's ctl_table (and enforced by procfs). Here in the case of
"max_dgram_qlen", 0644 is set; only the user owner has write access.

v1 -> v2:
* Add more detail to commit message, specify the
"/proc/sys/net/unix/max_dgram_qlen" sysctl in commit message.

Signed-off-by: Joanne Koong <joannekoong@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agou64_stats: Disable preemption on 32bit UP+SMP PREEMPT_RT during updates.
Sebastian Andrzej Siewior [Fri, 10 Dec 2021 20:29:59 +0000 (21:29 +0100)]
u64_stats: Disable preemption on 32bit UP+SMP PREEMPT_RT during updates.

On PREEMPT_RT the seqcount_t for synchronisation is required on 32bit
architectures even on UP because the softirq (and the threaded IRQ handler) can
be preempted.

With the seqcount_t for synchronisation, a reader with higher priority can
preempt the writer and then spin endlessly in read_seqcount_begin() while the
writer can't make progress.

To avoid such a lock up on PREEMPT_RT the writer must disable preemption during
the update. There is no need to disable interrupts because no writer is using
this API in hard-IRQ context on PREEMPT_RT.

Disable preemption on 32bit-RT within the u64_stats write section.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'bareudp-remove-unused'
David S. Miller [Mon, 13 Dec 2021 12:34:10 +0000 (12:34 +0000)]
Merge branch 'bareudp-remove-unused'

Guillaume Nault says:

====================
bareudp: Remove unused code from header file

Stop exporting unused functions and structures in bareudp.h. The only
piece of bareudp.h that is actually used is netif_is_bareudp(). The
rest can be moved to bareudp.c or even dropped entirely.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agobareudp: Move definition of struct bareudp_conf to bareudp.c
Guillaume Nault [Fri, 10 Dec 2021 19:56:39 +0000 (20:56 +0100)]
bareudp: Move definition of struct bareudp_conf to bareudp.c

This structure is used only in bareudp.c.

While there, adjust include files: we need netdevice.h, not skbuff.h.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agobareudp: Remove bareudp_dev_create()
Guillaume Nault [Fri, 10 Dec 2021 19:56:36 +0000 (20:56 +0100)]
bareudp: Remove bareudp_dev_create()

There's no user for this function.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agotipc: discard MSG_CRYPTO msgs when key_exchange_enabled is not set
Xin Long [Fri, 10 Dec 2021 18:50:40 +0000 (13:50 -0500)]
tipc: discard MSG_CRYPTO msgs when key_exchange_enabled is not set

When key_exchange is disabled, there is no reason to accept MSG_CRYPTO
msgs if it doesn't send MSG_CRYPTO msgs.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: stmmac: bump tc when get underflow error from DMA descriptor
Xiaoliang Yang [Wed, 8 Dec 2021 10:06:51 +0000 (18:06 +0800)]
net: stmmac: bump tc when get underflow error from DMA descriptor

In DMA threshold mode, frame underflow errors may sometimes occur when
the TC(threshold control) value is not enough. The TC value need to be
bumped up in this case.

There is no underflow interrupt bit on DMA_CH(#i)_Status of dwmac4, so
the DMA threshold cannot be bumped up in stmmac_dma_interrupt(). The
i.mx8mp board observed an underflow error while running NFS boot, the
NFS rootfs could not be mounted.

The underflow error can be got from the DMA descriptor TDES3 on dwmac4.
This patch bump up tc value once underflow error is got from TDES3.

Signed-off-by: Xiaoliang Yang <xiaoliang.yang_1@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'dsa-tagger-storage'
David S. Miller [Sun, 12 Dec 2021 12:51:34 +0000 (12:51 +0000)]
Merge branch 'dsa-tagger-storage'

Vladimir Oltean says:

====================
Replace DSA dp->priv with tagger-owned storage

Ansuel's recent work on qca8k register access over Ethernet:
https://patchwork.kernel.org/project/netdevbpf/cover/20211207145942.7444-1-ansuelsmth@gmail.com/
has triggered me to do something which I should've done for a longer
time:
https://patchwork.kernel.org/project/netdevbpf/patch/20211109095013.27829-7-martin.kaistra@linutronix.de/#24585521
which is to replace dp->priv with something that has less caveats.

The dp->priv was introduced when sja1105 needed to hold stateful
information in the tagging protocol driver. In that design, dp->priv
held memory allocated by the switch driver, because the tagging protocol
driver design was 100% stateless.

Some years have passed and others have started to feel the need for
stateful information kept by the tagger, as well as passing data back
and forth between the tagging protocol driver and the switch driver.
This isn't possible cleanly in DSA due to a circular dependency which
leads to broken module autoloading:
https://lore.kernel.org/netdev/20210908220834.d7gmtnwrorhharna@skbuf/

This patchset introduces a framework that resembles something normal,
which allows data to be passed from the tagging protocol driver (things
like switch management packets, which aren't intended for the network
stack) to the switch driver, while the tagging protocol still remains
more or less stateless. The overall design of the framework was
discussed with Ansuel too and it appears to be flexible enough to cover
the "register access over Ethernet" use case. Additionally, the existing
uses of dp->priv, which have mainly to do with PTP timestamping, have
also been migrated.

Changes in v2:
Fix transient build breakage in patch 5/11 due to a missing parenthesis,
https://patchwork.hopto.org/static/nipa/592567/12665213/build_clang/
and another transient build warning in patch 4/11 that for some reason
doesn't appear in my W=1 C=1 build.
https://patchwork.hopto.org/static/nipa/592567/12665209/build_clang/stderr
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: remove dp->priv
Vladimir Oltean [Thu, 9 Dec 2021 23:34:47 +0000 (01:34 +0200)]
net: dsa: remove dp->priv

All current in-tree uses of dp->priv have been replaced with
ds->tagger_data, which provides for a safer API especially when the
connection isn't the regular 1:1 link between one switch driver and one
tagging protocol driver, but could be either one switch to many taggers,
or many switches to one tagger.

Therefore, we can remove this unused pointer.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: tag_sja1105: split sja1105_tagger_data into private and public sections
Vladimir Oltean [Thu, 9 Dec 2021 23:34:46 +0000 (01:34 +0200)]
net: dsa: tag_sja1105: split sja1105_tagger_data into private and public sections

The sja1105 driver messes with the tagging protocol's state when PTP RX
timestamping is enabled/disabled. This is fundamentally necessary
because the tagger needs to know what to do when it receives a PTP
packet. If RX timestamping is enabled, then a metadata follow-up frame
is expected, and this holds the (partial) timestamp. So the tagger plays
hide-and-seek with the network stack until it also gets the metadata
frame, and then presents a single packet, the timestamped PTP packet.
But when RX timestamping isn't enabled, there is no metadata frame
expected, so the hide-and-seek game must be turned off and the packet
must be delivered right away to the network stack.

Considering this, we create a pseudo isolation by devising two tagger
methods callable by the switch: one to get the RX timestamping state,
and one to set it. Since we can't export symbols between the tagger and
the switch driver, these methods are exposed through function pointers.

After this change, the public portion of the sja1105_tagger_data
contains only function pointers.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoRevert "net: dsa: move sja1110_process_meta_tstamp inside the tagging protocol driver"
Vladimir Oltean [Thu, 9 Dec 2021 23:34:45 +0000 (01:34 +0200)]
Revert "net: dsa: move sja1110_process_meta_tstamp inside the tagging protocol driver"

This reverts commit 6d709cadfde68dbd12bef12fcced6222226dcb06.

The above change was done to avoid calling symbols exported by the
switch driver from the tagging protocol driver.

With the tagger-owned storage model, we have a new option on our hands,
and that is for the switch driver to provide a data consumer handler in
the form of a function pointer inside the ->connect_tag_protocol()
method. Having a function pointer avoids the problems of the exported
symbols approach.

By creating a handler for metadata frames holding TX timestamps on
SJA1110, we are able to eliminate an skb queue from the tagger data, and
replace it with a simple, and stateless, function pointer. This skb
queue is now handled exclusively by sja1105_ptp.c, which makes the code
easier to follow, as it used to be before the reverted patch.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: tag_sja1105: convert to tagger-owned data
Vladimir Oltean [Thu, 9 Dec 2021 23:34:44 +0000 (01:34 +0200)]
net: dsa: tag_sja1105: convert to tagger-owned data

Currently, struct sja1105_tagger_data is a part of struct
sja1105_private, and is used by the sja1105 driver to populate dp->priv.

With the movement towards tagger-owned storage, the sja1105 driver
should not be the owner of this memory.

This change implements the connection between the sja1105 switch driver
and its tagging protocol, which means that sja1105_tagger_data no longer
stays in dp->priv but in ds->tagger_data, and that the sja1105 driver
now only populates the sja1105_port_deferred_xmit callback pointer.
The kthread worker is now the responsibility of the tagger.

The sja1105 driver also alters the tagger's state some more, especially
with regard to the PTP RX timestamping state. This will be fixed up a
bit in further changes.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: sja1105: move ts_id from sja1105_tagger_data
Vladimir Oltean [Thu, 9 Dec 2021 23:34:43 +0000 (01:34 +0200)]
net: dsa: sja1105: move ts_id from sja1105_tagger_data

The TX timestamp ID is incremented by the SJA1110 PTP timestamping
callback (->port_tx_timestamp) for every packet, when cloning it.
It isn't used by the tagger at all, even though it sits inside the
struct sja1105_tagger_data.

Also, serialization to this structure is currently done through
tagger_data->meta_lock, which is a cheap hack because the meta_lock
isn't used for anything else on SJA1110 (sja1105_rcv_meta_state_machine
isn't called).

This change moves ts_id from sja1105_tagger_data to sja1105_private and
introduces a dedicated spinlock for it, also in sja1105_private.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: sja1105: make dp->priv point directly to sja1105_tagger_data
Vladimir Oltean [Thu, 9 Dec 2021 23:34:42 +0000 (01:34 +0200)]
net: dsa: sja1105: make dp->priv point directly to sja1105_tagger_data

The design of the sja1105 tagger dp->priv is that each port has a
separate struct sja1105_port, and the sp->data pointer points to a
common struct sja1105_tagger_data.

We have removed all per-port members accessible by the tagger, and now
only struct sja1105_tagger_data remains. Make dp->priv point directly to
this.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: sja1105: remove hwts_tx_en from tagger data
Vladimir Oltean [Thu, 9 Dec 2021 23:34:41 +0000 (01:34 +0200)]
net: dsa: sja1105: remove hwts_tx_en from tagger data

This tagger property is in fact not used at all by the tagger, only by
the switch driver. Therefore it makes sense to be moved to
sja1105_private.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: sja1105: bring deferred xmit implementation in line with ocelot-8021q
Vladimir Oltean [Thu, 9 Dec 2021 23:34:40 +0000 (01:34 +0200)]
net: dsa: sja1105: bring deferred xmit implementation in line with ocelot-8021q

When the ocelot-8021q driver was converted to deferred xmit as part of
commit 8d5f7954b7c8 ("net: dsa: felix: break at first CPU port during
init and teardown"), the deferred implementation was deliberately made
subtly different from what sja1105 has.

The implementation differences lied on the following observations:

- There might be a race between these two lines in tag_sja1105.c:

       skb_queue_tail(&sp->xmit_queue, skb_get(skb));
       kthread_queue_work(sp->xmit_worker, &sp->xmit_work);

  and the skb dequeue logic in sja1105_port_deferred_xmit(). For
  example, the xmit_work might be already queued, however the work item
  has just finished walking through the skb queue. Because we don't
  check the return code from kthread_queue_work, we don't do anything if
  the work item is already queued.

  However, nobody will take that skb and send it, at least until the
  next timestampable skb is sent. This creates additional (and
  avoidable) TX timestamping latency.

  To close that race, what the ocelot-8021q driver does is it doesn't
  keep a single work item per port, and a skb timestamping queue, but
  rather dynamically allocates a work item per packet.

- It is also unnecessary to have more than one kthread that does the
  work. So delete the per-port kthread allocations and replace them with
  a single kthread which is global to the switch.

This change brings the two implementations in line by applying those
observations to the sja1105 driver as well.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: sja1105: let deferred packets time out when sent to ports going down
Vladimir Oltean [Thu, 9 Dec 2021 23:34:39 +0000 (01:34 +0200)]
net: dsa: sja1105: let deferred packets time out when sent to ports going down

This code is not necessary and complicates the conversion of this driver
to tagger-owned memory. If there is a PTP packet that is sent
concurrently with the port getting disabled, the deferred xmit mechanism
is robust enough to time out when it sees that it hasn't been delivered,
and recovers.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: tag_ocelot: convert to tagger-owned data
Vladimir Oltean [Thu, 9 Dec 2021 23:34:38 +0000 (01:34 +0200)]
net: dsa: tag_ocelot: convert to tagger-owned data

The felix driver makes very light use of dp->priv, and the tagger is
effectively stateless. dp->priv is practically only needed to set up a
callback to perform deferred xmit of PTP and STP packets using the
ocelot-8021q tagging protocol (the main ocelot tagging protocol makes no
use of dp->priv, although this driver sets up dp->priv irrespective of
actual tagging protocol in use).

struct felix_port (what used to be pointed to by dp->priv) is removed
and replaced with a two-sided structure. The public side of this
structure, visible to the switch driver, is ocelot_8021q_tagger_data.
The private side is ocelot_8021q_tagger_private, and the latter
structure physically encapsulates the former. The public half of the
tagger data structure can be accessed through a helper of the same name
(ocelot_8021q_tagger_data) which also sanity-checks the protocol
currently in use by the switch. The public/private split was requested
by Andrew Lunn.

Suggested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: introduce tagger-owned storage for private and shared data
Vladimir Oltean [Thu, 9 Dec 2021 23:34:37 +0000 (01:34 +0200)]
net: dsa: introduce tagger-owned storage for private and shared data

Ansuel is working on register access over Ethernet for the qca8k switch
family. This requires the qca8k tagging protocol driver to receive
frames which aren't intended for the network stack, but instead for the
qca8k switch driver itself.

The dp->priv is currently the prevailing method for passing data back
and forth between the tagging protocol driver and the switch driver.
However, this method is riddled with caveats.

The DSA design allows in principle for any switch driver to return any
protocol it desires in ->get_tag_protocol(). The dsa_loop driver can be
modified to do just that. But in the current design, the memory behind
dp->priv has to be allocated by the switch driver, so if the tagging
protocol is paired to an unexpected switch driver, we may end up in NULL
pointer dereferences inside the kernel, or worse (a switch driver may
allocate dp->priv according to the expectations of a different tagger).

The latter possibility is even more plausible considering that DSA
switches can dynamically change tagging protocols in certain cases
(dsa <-> edsa, ocelot <-> ocelot-8021q), and the current design lends
itself to mistakes that are all too easy to make.

This patch proposes that the tagging protocol driver should manage its
own memory, instead of relying on the switch driver to do so.
After analyzing the different in-tree needs, it can be observed that the
required tagger storage is per switch, therefore a ds->tagger_data
pointer is introduced. In principle, per-port storage could also be
introduced, although there is no need for it at the moment. Future
changes will replace the current usage of dp->priv with ds->tagger_data.

We define a "binding" event between the DSA switch tree and the tagging
protocol. During this binding event, the tagging protocol's ->connect()
method is called first, and this may allocate some memory for each
switch of the tree. Then a cross-chip notifier is emitted for the
switches within that tree, and they are given the opportunity to fix up
the tagger's memory (for example, they might set up some function
pointers that represent virtual methods for consuming packets).
Because the memory is owned by the tagger, there exists a ->disconnect()
method for the tagger (which is the place to free the resources), but
there doesn't exist a ->disconnect() method for the switch driver.
This is part of the design. The switch driver should make minimal use of
the public part of the tagger data, and only after type-checking it
using the supplied "proto" argument.

In the code there are in fact two binding events, one is the initial
event in dsa_switch_setup_tag_protocol(). At this stage, the cross chip
notifier chains aren't initialized, so we call each switch's connect()
method by hand. Then there is dsa_tree_bind_tag_proto() during
dsa_tree_change_tag_proto(), and here we have an old protocol and a new
one. We first connect to the new one before disconnecting from the old
one, to simplify error handling a bit and to ensure we remain in a valid
state at all times.

Co-developed-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: dsa: mv88e6xxx: Add tx fwd offload PVT on intermediate devices
Tobias Waldekranz [Thu, 9 Dec 2021 22:24:24 +0000 (23:24 +0100)]
net: dsa: mv88e6xxx: Add tx fwd offload PVT on intermediate devices

In a typical mv88e6xxx switch tree like this:

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

If sw1p{1,2} are added to a bridge that sw0p1 is not a part of, sw0
still needs to add a crosschip PVT entry for the virtual DSA device
assigned to represent the bridge.

Fixes: ce5df6894a57 ("net: dsa: mv88e6xxx: map virtual bridges with forwarding offload in the PVT")
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agonet: Enable neighbor sysctls that is save for userns root
xu xin [Wed, 8 Dec 2021 08:58:44 +0000 (08:58 +0000)]
net: Enable neighbor sysctls that is save for userns root

Inside netns owned by non-init userns, sysctls about ARP/neighbor is
currently not visible and configurable.

For the attributes these sysctls correspond to, any modifications make
effects on the performance of networking(ARP, especilly) only in the
scope of netns, which does not affect other netns.

Actually, some tools via netlink can modify these attribute. iproute2 is
an example. see as follows:

$ unshare -ur -n
$ cat /proc/sys/net/ipv4/neigh/lo/retrans_time
cat: can't open '/proc/sys/net/ipv4/neigh/lo/retrans_time': No such file
or directory
$ ip ntable show dev lo
inet arp_cache
    dev lo
    refcnt 1 reachable 19494 base_reachable 30000 retrans 1000
    gc_stale 60000 delay_probe 5000 queue 101
    app_probes 0 ucast_probes 3 mcast_probes 3
    anycast_delay 1000 proxy_delay 800 proxy_queue 64 locktime 1000

inet6 ndisc_cache
    dev lo
    refcnt 1 reachable 42394 base_reachable 30000 retrans 1000
    gc_stale 60000 delay_probe 5000 queue 101
    app_probes 0 ucast_probes 3 mcast_probes 3
    anycast_delay 1000 proxy_delay 800 proxy_queue 64 locktime 0
$ ip ntable change name arp_cache dev <if> retrans 2000
inet arp_cache
    dev lo
    refcnt 1 reachable 22917 base_reachable 30000 retrans 2000
    gc_stale 60000 delay_probe 5000 queue 101
    app_probes 0 ucast_probes 3 mcast_probes 3
    anycast_delay 1000 proxy_delay 800 proxy_queue 64 locktime 1000

inet6 ndisc_cache
    dev lo
    refcnt 1 reachable 35524 base_reachable 30000 retrans 1000
    gc_stale 60000 delay_probe 5000 queue 101
    app_probes 0 ucast_probes 3 mcast_probes 3
    anycast_delay 1000 proxy_delay 800 proxy_queue 64 locktime 0

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: xu xin <xu.xin16@zte.com.cn>
Acked-by: Joanne Koong <joannekoong@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2 years agoMerge branch 'add-fdma-support-on-ocelot-switch-driver'
Jakub Kicinski [Sat, 11 Dec 2021 04:56:59 +0000 (20:56 -0800)]
Merge branch 'add-fdma-support-on-ocelot-switch-driver'

Clément Léger says:

====================
Add FDMA support on ocelot switch driver

This series adds support for the Frame DMA present on the VSC7514
switch. The FDMA is able to extract and inject packets on the various
ethernet interfaces present on the switch.
====================

Link: https://lore.kernel.org/r/20211209154911.3152830-1-clement.leger@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: ocelot: add FDMA support
Clément Léger [Thu, 9 Dec 2021 15:49:11 +0000 (16:49 +0100)]
net: ocelot: add FDMA support

Ethernet frames can be extracted or injected autonomously to or from
the device’s DDR3/DDR3L memory and/or PCIe memory space. Linked list
data structures in memory are used for injecting or extracting Ethernet
frames. The FDMA generates interrupts when frame extraction or
injection is done and when the linked lists need updating.

The FDMA is shared between all the ethernet ports of the switch and
uses a linked list of descriptors (DCB) to inject and extract packets.
Before adding descriptors, the FDMA channels must be stopped. It would
be inefficient to do that each time a descriptor would be added so the
channels are restarted only once they stopped.

Both channels uses ring-like structure to feed the DCBs to the FDMA.
head and tail are never touched by hardware and are completely handled
by the driver. On top of that, page recycling has been added and is
mostly taken from gianfar driver.

Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Co-developed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: ocelot: add support for ndo_change_mtu
Clément Léger [Thu, 9 Dec 2021 15:49:10 +0000 (16:49 +0100)]
net: ocelot: add support for ndo_change_mtu

This commit adds support for changing MTU for the ocelot register based
interface. For ocelot, JUMBO frame size can be set up to 25000 bytes
but has been set to 9000 which is a saner value and allows for maximum
gain of performance with FDMA.

Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: ocelot: add and export ocelot_ptp_rx_timestamp()
Clément Léger [Thu, 9 Dec 2021 15:49:09 +0000 (16:49 +0100)]
net: ocelot: add and export ocelot_ptp_rx_timestamp()

In order to support PTP in FDMA, PTP handling code is needed. Since
this is the same as for register-based extraction, export it with
a new ocelot_ptp_rx_timestamp() function.

Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: ocelot: export ocelot_ifh_port_set() to setup IFH
Clément Léger [Thu, 9 Dec 2021 15:49:08 +0000 (16:49 +0100)]
net: ocelot: export ocelot_ifh_port_set() to setup IFH

FDMA will need this code to prepare the injection frame header when
sending SKBs. Move this code into ocelot_ifh_port_set() and add
conditional IFH setting for vlan and rew op if they are not set.

Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge branch 'net-wwan-iosm-improvements'
Jakub Kicinski [Sat, 11 Dec 2021 04:53:58 +0000 (20:53 -0800)]
Merge branch 'net-wwan-iosm-improvements'

M Chetan Kumar says:

====================
net: wwan: iosm: improvements

This patch series brings in IOSM driver improvments.

PATCH1: Set tx queue len.
PATCH2: Release data channel if there is no active IP session.
PATCH3: Removes dead code.
PATCH4: Correct open parenthesis alignment.
====================

Link: https://lore.kernel.org/r/20211209143230.3054755-1-m.chetan.kumar@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: wwan: iosm: correct open parenthesis alignment
M Chetan Kumar [Thu, 9 Dec 2021 14:32:30 +0000 (20:02 +0530)]
net: wwan: iosm: correct open parenthesis alignment

Fix checkpatch warning in iosm_ipc_mmio.c
- Alignment should match open parenthesis

Signed-off-by: M Chetan Kumar <m.chetan.kumar@linux.intel.com>
Reviewed-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: wwan: iosm: removed unused function decl
M Chetan Kumar [Thu, 9 Dec 2021 14:32:29 +0000 (20:02 +0530)]
net: wwan: iosm: removed unused function decl

ipc_wwan_tx_flowctrl() is declared in iosm_ipc_wwan.h but is
not defined.

Removed the dead code.

Signed-off-by: M Chetan Kumar <m.chetan.kumar@linux.intel.com>
Reviewed-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: wwan: iosm: release data channel in case no active IP session
M Chetan Kumar [Thu, 9 Dec 2021 14:32:28 +0000 (20:02 +0530)]
net: wwan: iosm: release data channel in case no active IP session

If there is no active IP session (interface up & running) then
release the data channel.

Use nr_sessions variable to track current active IP sessions.
If the count drops to 0, then send pipe close ctrl message to
release the data channel.

Signed-off-by: M Chetan Kumar <m.chetan.kumar@linux.intel.com>
Reviewed-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: wwan: iosm: set tx queue len
M Chetan Kumar [Thu, 9 Dec 2021 14:32:27 +0000 (20:02 +0530)]
net: wwan: iosm: set tx queue len

Set wwan net dev tx queue len to DEFAULT_TX_QUEUE_LEN.

Signed-off-by: M Chetan Kumar <m.chetan.kumar@linux.intel.com>
Reviewed-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: ocelot: fix missed include in the vsc7514_regs.h file
Colin Foster [Thu, 9 Dec 2021 07:40:10 +0000 (23:40 -0800)]
net: ocelot: fix missed include in the vsc7514_regs.h file

commit 32ecd22ba60b ("net: mscc: ocelot: split register definitions to a
separate file") left out an include for <soc/mscc/ocelot_vcap.h>. It was
missed because the only consumer was ocelot_vsc7514.h, which already
included ocelot_vcap.

Fixes: 32ecd22ba60b ("net: mscc: ocelot: split register definitions to a separate file")
Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20211209074010.1813010-1-colin.foster@in-advantage.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: bna: Update supported link modes
Erik Ekman [Wed, 8 Dec 2021 23:00:22 +0000 (00:00 +0100)]
net: bna: Update supported link modes

The BR-series installation guide from https://driverdownloads.qlogic.com/
mentions the cards support 10Gbase-SR/LR as well as direct attach cables.

The cards only have SFP+ ports, so 10000baseT is not the right mode.
Switch to using more specific link modes added in commit 5711a98221443
("net: ethtool: add support for 1000BaseX and missing 10G link modes").

Only compile tested.

Signed-off-by: Erik Ekman <erik@kryo.se>
Link: https://lore.kernel.org/r/20211208230022.153496-1-erik@kryo.se
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agosock: Use sock_owned_by_user_nocheck() instead of sk_lock.owned.
Kuniyuki Iwashima [Wed, 8 Dec 2021 06:21:58 +0000 (15:21 +0900)]
sock: Use sock_owned_by_user_nocheck() instead of sk_lock.owned.

This patch moves sock_release_ownership() down in include/net/sock.h and
replaces some sk_lock.owned tests with sock_owned_by_user_nocheck().

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp>
Link: https://lore.kernel.org/r/20211208062158.54132-1-kuniyu@amazon.co.jp
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Jakub Kicinski [Fri, 10 Dec 2021 23:56:10 +0000 (15:56 -0800)]
Merge https://git./linux/kernel/git/bpf/bpf-next

Andrii Nakryiko says:

====================
bpf-next 2021-12-10 v2

We've added 115 non-merge commits during the last 26 day(s) which contain
a total of 182 files changed, 5747 insertions(+), 2564 deletions(-).

The main changes are:

1) Various samples fixes, from Alexander Lobakin.

2) BPF CO-RE support in kernel and light skeleton, from Alexei Starovoitov.

3) A batch of new unified APIs for libbpf, logging improvements, version
   querying, etc. Also a batch of old deprecations for old APIs and various
   bug fixes, in preparation for libbpf 1.0, from Andrii Nakryiko.

4) BPF documentation reorganization and improvements, from Christoph Hellwig
   and Dave Tucker.

5) Support for declarative initialization of BPF_MAP_TYPE_PROG_ARRAY in
   libbpf, from Hengqi Chen.

6) Verifier log fixes, from Hou Tao.

7) Runtime-bounded loops support with bpf_loop() helper, from Joanne Koong.

8) Extend branch record capturing to all platforms that support it,
   from Kajol Jain.

9) Light skeleton codegen improvements, from Kumar Kartikeya Dwivedi.

10) bpftool doc-generating script improvements, from Quentin Monnet.

11) Two libbpf v0.6 bug fixes, from Shuyi Cheng and Vincent Minet.

12) Deprecation warning fix for perf/bpf_counter, from Song Liu.

13) MAX_TAIL_CALL_CNT unification and MIPS build fix for libbpf,
    from Tiezhu Yang.

14) BTF_KING_TYPE_TAG follow-up fixes, from Yonghong Song.

15) Selftests fixes and improvements, from Ilya Leoshkevich, Jean-Philippe
    Brucker, Jiri Olsa, Maxim Mikityanskiy, Tirthendu Sarkar, Yucong Sun,
    and others.

* https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (115 commits)
  libbpf: Add "bool skipped" to struct bpf_map
  libbpf: Fix typo in btf__dedup@LIBBPF_0.0.2 definition
  bpftool: Switch bpf_object__load_xattr() to bpf_object__load()
  selftests/bpf: Remove the only use of deprecated bpf_object__load_xattr()
  selftests/bpf: Add test for libbpf's custom log_buf behavior
  selftests/bpf: Replace all uses of bpf_load_btf() with bpf_btf_load()
  libbpf: Deprecate bpf_object__load_xattr()
  libbpf: Add per-program log buffer setter and getter
  libbpf: Preserve kernel error code and remove kprobe prog type guessing
  libbpf: Improve logging around BPF program loading
  libbpf: Allow passing user log setting through bpf_object_open_opts
  libbpf: Allow passing preallocated log_buf when loading BTF into kernel
  libbpf: Add OPTS-based bpf_btf_load() API
  libbpf: Fix bpf_prog_load() log_buf logic for log_level 0
  samples/bpf: Remove unneeded variable
  bpf: Remove redundant assignment to pointer t
  selftests/bpf: Fix a compilation warning
  perf/bpf_counter: Use bpf_map_create instead of bpf_create_map
  samples: bpf: Fix 'unknown warning group' build warning on Clang
  samples: bpf: Fix xdp_sample_user.o linking with Clang
  ...
====================

Link: https://lore.kernel.org/r/20211210234746.2100561-1-andrii@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agolibbpf: Add "bool skipped" to struct bpf_map
Shuyi Cheng [Fri, 10 Dec 2021 09:39:57 +0000 (17:39 +0800)]
libbpf: Add "bool skipped" to struct bpf_map

Fix error: "failed to pin map: Bad file descriptor, path:
/sys/fs/bpf/_rodata_str1_1."

In the old kernel, the global data map will not be created, see [0]. So
we should skip the pinning of the global data map to avoid
bpf_object__pin_maps returning error. Therefore, when the map is not
created, we mark “map->skipped" as true and then check during relocation
and during pinning.

Fixes: 16e0c35c6f7a ("libbpf: Load global data maps lazily on legacy kernels")
Signed-off-by: Shuyi Cheng <chengshuyi@linux.alibaba.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
2 years agolibbpf: Fix typo in btf__dedup@LIBBPF_0.0.2 definition
Vincent Minet [Fri, 10 Dec 2021 06:31:12 +0000 (07:31 +0100)]
libbpf: Fix typo in btf__dedup@LIBBPF_0.0.2 definition

The btf__dedup_deprecated name was misspelled in the definition of the
compat symbol for btf__dedup. This leads it to be missing from the
shared library.

This fixes it.

Fixes: 957d350a8b94 ("libbpf: Turn btf_dedup_opts into OPTS-based struct")
Signed-off-by: Vincent Minet <vincent@vincent-minet.net>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211210063112.80047-1-vincent@vincent-minet.net
2 years agoMerge branch 'Enhance and rework logging controls in libbpf'
Alexei Starovoitov [Thu, 9 Dec 2021 23:40:34 +0000 (15:40 -0800)]
Merge branch 'Enhance and rework logging controls in libbpf'

Andrii Nakryiko says:

====================

Add new open options and per-program setters to control BTF and program
loading log verboseness and allow providing custom log buffers to capture logs
of interest. Note how custom log_buf and log_level are orthogonal, which
matches previous (alas less customizable) behavior of libbpf, even though it
sort of worked by accident: if someone specified log_level = 1 in
bpf_object__load_xattr(), first attempt to load any BPF program resulted in
wasted bpf() syscall with -EINVAL due to !!log_buf != !!log_level. Then on
retry libbpf would allocated log_buffer and try again, after which prog
loading would succeed and libbpf would print verbose program loading log
through its print callback.

This behavior is now documented and made more efficient, not wasting
unnecessary syscall. But additionally, log_level can be controlled globally on
a per-bpf_object level through bpf_object_open_opts, as well as on
a per-program basis with bpf_program__set_log_buf() and
bpf_program__set_log_level() APIs.

Now that we have a more future-proof way to set log_level, deprecate
bpf_object__load_xattr().

v2->v3:
  - added log_buf selftests for bpf_prog_load() and bpf_btf_load();
  - fix !log_buf in bpf_prog_load (John);
  - fix log_level==0 in bpf_btf_load (thanks selftest!);

v1->v2:
  - fix log_level == 0 handling of bpf_prog_load, add as patch #1 (Alexei);
  - add comments explaining log_buf_size overflow prevention (Alexei).
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
2 years agobpftool: Switch bpf_object__load_xattr() to bpf_object__load()
Andrii Nakryiko [Thu, 9 Dec 2021 19:38:40 +0000 (11:38 -0800)]
bpftool: Switch bpf_object__load_xattr() to bpf_object__load()

Switch all the uses of to-be-deprecated bpf_object__load_xattr() into
a simple bpf_object__load() calls with optional log_level passed through
open_opts.kernel_log_level, if -d option is specified.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211209193840.1248570-13-andrii@kernel.org
2 years agoselftests/bpf: Remove the only use of deprecated bpf_object__load_xattr()
Andrii Nakryiko [Thu, 9 Dec 2021 19:38:39 +0000 (11:38 -0800)]
selftests/bpf: Remove the only use of deprecated bpf_object__load_xattr()

Switch from bpf_object__load_xattr() to bpf_object__load() and
kernel_log_level in bpf_object_open_opts.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211209193840.1248570-12-andrii@kernel.org
2 years agoselftests/bpf: Add test for libbpf's custom log_buf behavior
Andrii Nakryiko [Thu, 9 Dec 2021 19:38:38 +0000 (11:38 -0800)]
selftests/bpf: Add test for libbpf's custom log_buf behavior

Add a selftest that validates that per-program and per-object log_buf
overrides work as expected. Also test same logic for low-level
bpf_prog_load() and bpf_btf_load() APIs.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211209193840.1248570-11-andrii@kernel.org
2 years agoselftests/bpf: Replace all uses of bpf_load_btf() with bpf_btf_load()
Andrii Nakryiko [Thu, 9 Dec 2021 19:38:37 +0000 (11:38 -0800)]
selftests/bpf: Replace all uses of bpf_load_btf() with bpf_btf_load()

Switch all selftests uses of to-be-deprecated bpf_load_btf() with
equivalent bpf_btf_load() calls.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211209193840.1248570-10-andrii@kernel.org
2 years agolibbpf: Deprecate bpf_object__load_xattr()
Andrii Nakryiko [Thu, 9 Dec 2021 19:38:36 +0000 (11:38 -0800)]
libbpf: Deprecate bpf_object__load_xattr()

Deprecate non-extensible bpf_object__load_xattr() in v0.8 ([0]).

With log_level control through bpf_object_open_opts or
bpf_program__set_log_level(), we are finally at the point where
bpf_object__load_xattr() doesn't provide any functionality that can't be
accessed through other (better) ways. The other feature,
target_btf_path, is also controllable through bpf_object_open_opts.

  [0] Closes: https://github.com/libbpf/libbpf/issues/289

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211209193840.1248570-9-andrii@kernel.org
2 years agolibbpf: Add per-program log buffer setter and getter
Andrii Nakryiko [Thu, 9 Dec 2021 19:38:35 +0000 (11:38 -0800)]
libbpf: Add per-program log buffer setter and getter

Allow to set user-provided log buffer on a per-program basis ([0]). This
gives great deal of flexibility in terms of which programs are loaded
with logging enabled and where corresponding logs go.

Log buffer set with bpf_program__set_log_buf() overrides kernel_log_buf
and kernel_log_size settings set at bpf_object open time through
bpf_object_open_opts, if any.

Adjust bpf_object_load_prog_instance() logic to not perform own log buf
allocation and load retry if custom log buffer is provided by the user.

  [0] Closes: https://github.com/libbpf/libbpf/issues/418

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211209193840.1248570-8-andrii@kernel.org
2 years agolibbpf: Preserve kernel error code and remove kprobe prog type guessing
Andrii Nakryiko [Thu, 9 Dec 2021 19:38:34 +0000 (11:38 -0800)]
libbpf: Preserve kernel error code and remove kprobe prog type guessing

Instead of rewriting error code returned by the kernel of prog load with
libbpf-sepcific variants pass through the original error.

There is now also no need to have a backup generic -LIBBPF_ERRNO__LOAD
fallback error as bpf_prog_load() guarantees that errno will be properly
set no matter what.

Also drop a completely outdated and pretty useless BPF_PROG_TYPE_KPROBE
guess logic. It's not necessary and neither it's helpful in modern BPF
applications.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211209193840.1248570-7-andrii@kernel.org
2 years agolibbpf: Improve logging around BPF program loading
Andrii Nakryiko [Thu, 9 Dec 2021 19:38:33 +0000 (11:38 -0800)]
libbpf: Improve logging around BPF program loading

Add missing "prog '%s': " prefixes in few places and use consistently
markers for beginning and end of program load logs. Here's an example of
log output:

libbpf: prog 'handler': BPF program load failed: Permission denied
libbpf: -- BEGIN PROG LOAD LOG ---
arg#0 reference type('UNKNOWN ') size cannot be determined: -22
; out1 = in1;
0: (18) r1 = 0xffffc9000cdcc000
2: (61) r1 = *(u32 *)(r1 +0)

...

81: (63) *(u32 *)(r4 +0) = r5
 R1_w=map_value(id=0,off=16,ks=4,vs=20,imm=0) R4=map_value(id=0,off=400,ks=4,vs=16,imm=0)
invalid access to map value, value_size=16 off=400 size=4
R4 min value is outside of the allowed memory range
processed 63 insns (limit 1000000) max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0
 -- END PROG LOAD LOG --
libbpf: failed to load program 'handler'
libbpf: failed to load object 'test_skeleton'

The entire verifier log, including BEGIN and END markers are now always
youtput during a single print callback call. This should make it much
easier to post-process or parse it, if necessary. It's not an explicit
API guarantee, but it can be reasonably expected to stay like that.

Also __bpf_object__open is renamed to bpf_object_open() as it's always
an adventure to find the exact function that implements bpf_object's
open phase, so drop the double underscored and use internal libbpf
naming convention.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211209193840.1248570-6-andrii@kernel.org
2 years agolibbpf: Allow passing user log setting through bpf_object_open_opts
Andrii Nakryiko [Thu, 9 Dec 2021 19:38:32 +0000 (11:38 -0800)]
libbpf: Allow passing user log setting through bpf_object_open_opts

Allow users to provide their own custom log_buf, log_size, and log_level
at bpf_object level through bpf_object_open_opts. This log_buf will be
used during BTF loading. Subsequent patch will use same log_buf during
BPF program loading, unless overriden at per-bpf_program level.

When such custom log_buf is provided, libbpf won't be attempting
retrying loading of BTF to try to provide its own log buffer to capture
kernel's error log output. User is responsible to provide big enough
buffer, otherwise they run a risk of getting -ENOSPC error from the
bpf() syscall.

See also comments in bpf_object_open_opts regarding log_level and
log_buf interactions.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211209193840.1248570-5-andrii@kernel.org
2 years agolibbpf: Allow passing preallocated log_buf when loading BTF into kernel
Andrii Nakryiko [Thu, 9 Dec 2021 19:38:31 +0000 (11:38 -0800)]
libbpf: Allow passing preallocated log_buf when loading BTF into kernel

Add libbpf-internal btf_load_into_kernel() that allows to pass
preallocated log_buf and custom log_level to be passed into kernel
during BPF_BTF_LOAD call. When custom log_buf is provided,
btf_load_into_kernel() won't attempt an retry with automatically
allocated internal temporary buffer to capture BTF validation log.

It's important to note the relation between log_buf and log_level, which
slightly deviates from stricter kernel logic. From kernel's POV, if
log_buf is specified, log_level has to be > 0, and vice versa. While
kernel has good reasons to request such "sanity, this, in practice, is
a bit unconvenient and restrictive for libbpf's high-level bpf_object APIs.

So libbpf will allow to set non-NULL log_buf and log_level == 0. This is
fine and means to attempt to load BTF without logging requested, but if
it failes, retry the load with custom log_buf and log_level 1. Similar
logic will be implemented for program loading. In practice this means
that users can provide custom log buffer just in case error happens, but
not really request slower verbose logging all the time. This is also
consistent with libbpf behavior when custom log_buf is not set: libbpf
first tries to load everything with log_level=0, and only if error
happens allocates internal log buffer and retries with log_level=1.

Also, while at it, make BTF validation log more obvious and follow the log
pattern libbpf is using for dumping BPF verifier log during
BPF_PROG_LOAD. BTF loading resulting in an error will look like this:

libbpf: BTF loading error: -22
libbpf: -- BEGIN BTF LOAD LOG ---
magic: 0xeb9f
version: 1
flags: 0x0
hdr_len: 24
type_off: 0
type_len: 1040
str_off: 1040
str_len: 2063598257
btf_total_size: 1753
Total section length too long
-- END BTF LOAD LOG --
libbpf: Error loading .BTF into kernel: -22. BTF is optional, ignoring.

This makes it much easier to find relevant parts in libbpf log output.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211209193840.1248570-4-andrii@kernel.org
2 years agolibbpf: Add OPTS-based bpf_btf_load() API
Andrii Nakryiko [Thu, 9 Dec 2021 19:38:30 +0000 (11:38 -0800)]
libbpf: Add OPTS-based bpf_btf_load() API

Similar to previous bpf_prog_load() and bpf_map_create() APIs, add
bpf_btf_load() API which is taking optional OPTS struct. Schedule
bpf_load_btf() for deprecation in v0.8 ([0]).

This makes naming consistent with BPF_BTF_LOAD command, sets up an API
for extensibility in the future, moves options parameters (log-related
fields) into optional options, and also allows to pass log_level
directly.

It also removes log buffer auto-allocation logic from low-level API
(consistent with bpf_prog_load() behavior), but preserves a special
treatment of log_level == 0 with non-NULL log_buf, which matches
low-level bpf_prog_load() and high-level libbpf APIs for BTF and program
loading behaviors.

  [0] Closes: https://github.com/libbpf/libbpf/issues/419

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211209193840.1248570-3-andrii@kernel.org
2 years agolibbpf: Fix bpf_prog_load() log_buf logic for log_level 0
Andrii Nakryiko [Thu, 9 Dec 2021 19:38:29 +0000 (11:38 -0800)]
libbpf: Fix bpf_prog_load() log_buf logic for log_level 0

To unify libbpf APIs behavior w.r.t. log_buf and log_level, fix
bpf_prog_load() to follow the same logic as bpf_btf_load() and
high-level bpf_object__load() API will follow in the subsequent patches:
  - if log_level is 0 and non-NULL log_buf is provided by a user, attempt
    load operation initially with no log_buf and log_level set;
  - if successful, we are done, return new FD;
  - on error, retry the load operation with log_level bumped to 1 and
    log_buf set; this way verbose logging will be requested only when we
    are sure that there is a failure, but will be fast in the
    common/expected success case.

Of course, user can still specify log_level > 0 from the very beginning
to force log collection.

Suggested-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211209193840.1248570-2-andrii@kernel.org
2 years agoselftests: mptcp: remove duplicate include in mptcp_inq.c
Ye Guojin [Fri, 10 Dec 2021 07:14:24 +0000 (07:14 +0000)]
selftests: mptcp: remove duplicate include in mptcp_inq.c

'sys/ioctl.h' included in 'mptcp_inq.c' is duplicated.

Reported-by: ZealRobot <zealci@zte.com.cn>
Signed-off-by: Ye Guojin <ye.guojin@zte.com.cn>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Link: https://lore.kernel.org/r/20211210071424.425773-1-ye.guojin@zte.com.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoxfrm: add net device refcount tracker to struct xfrm_state_offload
Eric Dumazet [Thu, 9 Dec 2021 15:44:51 +0000 (07:44 -0800)]
xfrm: add net device refcount tracker to struct xfrm_state_offload

Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Steffen Klassert <steffen.klassert@secunet.com>
Link: https://lore.kernel.org/r/20211209154451.4184050-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge branch 'net-netns-refcount-tracking-base-series'
Jakub Kicinski [Fri, 10 Dec 2021 14:38:30 +0000 (06:38 -0800)]
Merge branch 'net-netns-refcount-tracking-base-series'

Eric Dumazet says:

====================
net: netns refcount tracking, base series

We have 100+ syzbot reports about netns being dismantled too soon,
still unresolved as of today.

We think a missing get_net() or an extra put_net() is the root cause.

In order to find the bug(s), and be able to spot future ones,
this patch adds CONFIG_NET_NS_REFCNT_TRACKER and new helpers
to precisely pair all put_net() with corresponding get_net().

To use these helpers, each data structure owning a refcount
should also use a "netns_tracker" to pair the get() and put().

Small sections of codes where the get()/put() are in sight
do not need to have a tracker, because they are short lived,
but in theory it is also possible to declare an on-stack tracker.

v2: Include core networking patches only.
====================

Link: https://lore.kernel.org/r/20211210074426.279563-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoppp: add netns refcount tracker
Eric Dumazet [Fri, 10 Dec 2021 07:44:26 +0000 (23:44 -0800)]
ppp: add netns refcount tracker

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agol2tp: add netns refcount tracker to l2tp_dfs_seq_data
Eric Dumazet [Fri, 10 Dec 2021 07:44:25 +0000 (23:44 -0800)]
l2tp: add netns refcount tracker to l2tp_dfs_seq_data

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: sched: add netns refcount tracker to struct tcf_exts
Eric Dumazet [Fri, 10 Dec 2021 07:44:24 +0000 (23:44 -0800)]
net: sched: add netns refcount tracker to struct tcf_exts

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: add netns refcount tracker to struct seq_net_private
Eric Dumazet [Fri, 10 Dec 2021 07:44:23 +0000 (23:44 -0800)]
net: add netns refcount tracker to struct seq_net_private

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: add netns refcount tracker to struct sock
Eric Dumazet [Fri, 10 Dec 2021 07:44:22 +0000 (23:44 -0800)]
net: add netns refcount tracker to struct sock

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: add networking namespace refcount tracker
Eric Dumazet [Fri, 10 Dec 2021 07:44:21 +0000 (23:44 -0800)]
net: add networking namespace refcount tracker

We have 100+ syzbot reports about netns being dismantled too soon,
still unresolved as of today.

We think a missing get_net() or an extra put_net() is the root cause.

In order to find the bug(s), and be able to spot future ones,
this patch adds CONFIG_NET_NS_REFCNT_TRACKER and new helpers
to precisely pair all put_net() with corresponding get_net().

To use these helpers, each data structure owning a refcount
should also use a "netns_tracker" to pair the get and put.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agosh_eth: Use dev_err_probe() helper
Geert Uytterhoeven [Wed, 8 Dec 2021 10:32:07 +0000 (11:32 +0100)]
sh_eth: Use dev_err_probe() helper

Use the dev_err_probe() helper, instead of open-coding the same
operation.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Link: https://lore.kernel.org/r/2576cc15bdbb5be636640f491bcc087a334e2c02.1638959463.git.geert+renesas@glider.be
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: x25: drop harmless check of !more
Jean Sacren [Wed, 8 Dec 2021 07:20:25 +0000 (00:20 -0700)]
net: x25: drop harmless check of !more

'more' is checked first.  When !more is checked immediately after that,
it is always true.  We should drop this check.

Signed-off-by: Jean Sacren <sakiwit@gmail.com>
Acked-by: Martin Schiller <ms@dev.tdt.de>
Link: https://lore.kernel.org/r/20211208024732.142541-5-sakiwit@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Jakub Kicinski [Thu, 9 Dec 2021 20:04:19 +0000 (12:04 -0800)]
Merge git://git./linux/kernel/git/netdev/net

No conflicts.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agoskbuff: Extract list pointers to silence compiler warnings
Kees Cook [Tue, 7 Dec 2021 06:27:58 +0000 (22:27 -0800)]
skbuff: Extract list pointers to silence compiler warnings

Under both -Warray-bounds and the object_size sanitizer, the compiler is
upset about accessing prev/next of sk_buff when the object it thinks it
is coming from is sk_buff_head. The warning is a false positive due to
the compiler taking a conservative approach, opting to warn at casting
time rather than access time.

However, in support of enabling -Warray-bounds globally (which has
found many real bugs), arrange things for sk_buff so that the compiler
can unambiguously see that there is no intention to access anything
except prev/next.  Introduce and cast to a separate struct sk_buff_list,
which contains _only_ the first two fields, silencing the warnings:

In file included from ./include/net/net_namespace.h:39,
                 from ./include/linux/netdevice.h:37,
                 from net/core/netpoll.c:17:
net/core/netpoll.c: In function 'refill_skbs':
./include/linux/skbuff.h:2086:9: warning: array subscript 'struct sk_buff[0]' is partly outside array bounds of 'struct sk_buff_head[1]' [-Warray-bounds]
 2086 |         __skb_insert(newsk, next->prev, next, list);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
net/core/netpoll.c:49:28: note: while referencing 'skb_pool'
   49 | static struct sk_buff_head skb_pool;
      |                            ^~~~~~~~

This change results in no executable instruction differences.

Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20211207062758.2324338-1-keescook@chromium.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2 years agonet: phy: prefer 1000baseT over 1000baseKX
Russell King (Oracle) [Wed, 8 Dec 2021 11:36:30 +0000 (11:36 +0000)]
net: phy: prefer 1000baseT over 1000baseKX

The PHY settings table is supposed to be sorted by descending match
priority - in other words, earlier entries are preferred over later
entries.

The order of 1000baseKX/Full and 1000baseT/Full is such that we
prefer 1000baseKX/Full over 1000baseT/Full, but 1000baseKX/Full is
a lot rarer than 1000baseT/Full, and thus is much less likely to
be preferred.

This causes phylink problems - it means a fixed link specifying a
speed of 1G and full duplex gets an ethtool linkmode of 1000baseKX/Full
rather than 1000baseT/Full as would be expected - and since we offer
userspace a software emulation of a conventional copper PHY, we want
to offer copper modes in preference to anything else. However, we do
still want to allow the rarer modes as well.

Hence, let's reorder these two modes to prefer copper.

Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reported-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/E1muvFO-00F6jY-1K@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>