Lennert Buytenhek explains in commit df02c6ff2e ("dsa: fix master
interface allmulti/promisc handling"), dated Nov 2008, that changing the
promiscuity of interfaces that are down (here the master) is broken.
This fact regarding promisc/allmulti has changed since commit
b6c40d68ff ("net: only invoke dev->change_rx_flags when device is UP")
by Vlad Yasevich, dated Nov 2013.
Therefore, DSA now has unnecessary complexity to handle master state
transitions from down to up. In fact, syncing the unicast and multicast
addresses can happen completely asynchronously to the administrative
state changes.
This change reduces that complexity by effectively fully reverting
commit df02c6ff2e ("dsa: fix master interface allmulti/promisc
handling").
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
seqno could be read as a stale value outside of the lock. The lock is
already acquired to protect the modification of seqno against a possible
race condition. Place the reading of this value also inside this locking
to protect it against a possible race condition.
Signed-off-by: Niels Dossche <dossche.niels@gmail.com>
Acked-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add a new ice_gnss.c file for holding the basic GNSS module functions.
If the device supports GNSS module, call the new ice_gnss_init and
ice_gnss_release functions where appropriate.
Implement basic functionality for reading the data from GNSS module
using TTY device.
Add I2C read AQ command. It is now required for controlling the external
physical connectors via external I2C port expander on E810-T adapters.
Future changes will introduce write functionality.
Signed-off-by: Karol Kolacinski <karol.kolacinski@intel.com>
Signed-off-by: Sudhansu Sekhar Mishra <sudhansu.mishra@intel.com>
Tested-by: Sunitha Mekala <sunithax.d.mekala@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The 'kgdboc_earlycon_init' looks for boot console that has both .read
and .write callbacks. Adds 'samsung_early_read' to samsung_tty.c's early
console to support kgdboc.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Woody Lin <woodylin@google.com>
Link: https://lore.kernel.org/r/20220302114923.144523-1-woodylin@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Currently, uart_console_write->putchar's second parameter (the
character) is of type int. It makes little sense, provided uart_console_write()
accepts the input string as "const char *s" and passes its content -- the
characters -- to putchar(). So switch the character's type to unsigned
char.
We don't use char as that is signed on some platforms. That would cause
troubles for drivers which (implicitly) cast the char to u16 when
writing to the device. Sign extension would happen in that case and the
value written would be completely different to the provided char. DZ is
an example of such a driver -- on MIPS, it uses u16 for dz_out in
dz_console_putchar().
Note we do the char -> uchar conversion implicitly in
uart_console_write(). Provided we do not change size of the data type,
sign extension does not happen there, so the problem is void.
This makes the types consistent and unified with the rest of the uart
layer, which uses unsigned char in most places already. One exception is
xmit_buf, but that is going to be converted later.
Cc: Paul Cercueil <paul@crapouillou.net>
Cc: Tobias Klauser <tklauser@distanz.ch>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Vineet Gupta <vgupta@kernel.org>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: bcm-kernel-feedback-list@broadcom.com
Cc: Alexander Shiyan <shc_work@mail.ru>
Cc: Baruch Siach <baruch@tkos.co.il>
Cc: "Maciej W. Rozycki" <macro@orcam.me.uk>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: Karol Gugala <kgugala@antmicro.com>
Cc: Mateusz Holenko <mholenko@antmicro.com>
Cc: Vladimir Zapolskiy <vz@mleia.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: Taichi Sugaya <sugaya.taichi@socionext.com>
Cc: Takao Orito <orito.takao@socionext.com>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: "Andreas Färber" <afaerber@suse.de>
Cc: Manivannan Sadhasivam <mani@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Andy Gross <agross@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Baolin Wang <baolin.wang7@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Cc: Patrice Chotard <patrice.chotard@foss.st.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Peter Korsgaard <peter@korsgaard.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Acked-by: Richard Genoud <richard.genoud@gmail.com> [atmel_serial]
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Paul Cercueil <paul@crapouillou.net>
Acked-by: Neil Armstrong <narmstrong@baylibre.com> # meson_serial
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Link: https://lore.kernel.org/r/20220303080831.21783-1-jslaby@suse.cz
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Some users are suffering with PSR2 issues that are under debug or
issues that were root caused to panel firmware bugs, to make life of
those users easier here adding a option to disable PSR2 with kernel
parameters so they can still benefit from PSR1 power savings.
Using the same enable_psr that is current used to turn the whole
feature on or off and allowing user to select up to what PSR version
it should enable.
Right now users only set this parameter to 0 when they want to disable
PSR1 and PSR2 or don't add it at all leaving it to per-chip behavior
so it should not cause a bad impact on users.
v2:
- changing enable_psr values (Ville and Rodrigo)
Link: https://gitlab.freedesktop.org/drm/intel/-/issues/4951
Cc: Jouni Högander <jouni.hogander@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220224202523.993560-1-jose.souza@intel.com
Currently we are observing occasional screen flickering when
PSR2 selective fetch is enabled. More specifically glitch seems
to happen on full frame update when cursor moves to coords
x = -1 or y = -1.
According to Bspec SF Single full frame should not be set if
SF Partial Frame Enable is not set. This happened to be true for
ADLP as PSR2_MAN_TRK_CTL_ENABLE is always set and for ADL_P it's
actually "SF Partial Frame Enable" (Bit 31).
Setting "SF Partial Frame Enable" bit also on full update seems to
fix screen flickering.
Also make code more clear by setting PSR2_MAN_TRK_CTL_ENABLE
only if not on ADL_P. Bit 31 has different meaning in ADL_P.
Bspec: 49274
v2: Fix Mihai Harpau email address
v3: Modify commit message and remove unnecessary comment
Tested-by: Lyude Paul <lyude@redhat.com>
Fixes: 7f6002e580 ("drm/i915/display: Enable PSR2 selective fetch by default")
Reported-by: Lyude Paul <lyude@redhat.com>
Cc: Mihai Harpau <mharpau@gmail.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Bugzilla: https://gitlab.freedesktop.org/drm/intel/-/issues/5077
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220225070228.855138-1-jouni.hogander@intel.com
This patch fix the second dai driver's dai widget can't connect to the
endpoint. Because "bt-sco-pcm" and "bt-sco-pcm-wb" dai driver have the
same stream_name, so it will cause they have the same widget name.
Therefor it will just create only one route when do snd_soc_dapm_add_route
that only find the widget through the widget name.
Signed-off-by: Jiaxin Yu <jiaxin.yu@mediatek.com>
Link: https://lore.kernel.org/r/20220302013533.29068-1-jiaxin.yu@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>
pcm name can be "Analog" and "Alt Analog", cpcm->name can be
"Analog Codec DAI" and "Alt Analog Codec DAI". When pcm_name
is "Analog", "Analog Codec DAI" and "Alt Analog Codec DAI" are
both satisfy the 'if (strstr(cpcm->name, pcm_name))' condition,
which may cause the returned cpcm to be "Alt Analog Codec DAI".
Even if we get the pcm name by id, and "Analog Codec DAI" goes
into the loop before "Alt Analog Codec DAI", but I still think
we'd better have multiple insurances against unexpected return
values. After, we can correctly return the expected result
even if other relevant places are changed.
Signed-off-by: Meng Tang <tangmeng@uniontech.com>
Link: https://lore.kernel.org/r/20220302094351.3487-1-tangmeng@uniontech.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This reverts commit 5bed9f3f63.
Gal Presman says:
this patch broke geneve tunnels, or possibly all udp tunnels?
A simple test that creates two geneve tunnels and runs tcp iperf fails
and results in checksum errors (TcpInCsumErrors).
Original commit wanted to fix nf_reject with zero checksum,
so it appears better to change nf reject infra instead.
Fixes: 5bed9f3f63 ("netfilter: conntrack: mark UDP zero checksum as CHECKSUM_UNNECESSARY")
Reported-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
hci_cmd_sync_queue can be called multiple times, each adding a
hci_cmd_sync_work_entry, before hci_cmd_sync_work is run so this makes
sure they are all dequeued properly otherwise it creates a backlog of
entries that are never run.
Link: https://lore.kernel.org/all/CAJCQCtSeUtHCgsHXLGrSTWKmyjaQDbDNpP4rb0i+RE+L2FTXSA@mail.gmail.com/T/
Fixes: 6a98e3836f ("Bluetooth: Add helper for serialized HCI command execution")
Tested-by: Chris Clayton <chris2553@googlemail.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
On Gen3 hardware enabling a VSP plane doesn't change any register that
requires DRES to take effect. Avoid a group restart in that case.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
The VSP1 sink selection through register DEFR8 is only available on Gen2
hardware. Skip it on Gen3.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
VBT 249 update to support more TMDS clock rate 3.00G, 3.40G
and 5.94G. Refer to this new definition to configure max
TMDS clock rate for HDMI driver.
BSpec: 20124
v2: new subject
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Lee Shawn C <shawn.c.lee@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220303083802.5071-1-shawn.c.lee@intel.com
When valid kernel command line parameters
dma_debug=off dma_debug_entries=100
are used, they are reported as Unknown parameters and added to init's
environment strings, polluting it.
Unknown kernel command line parameters "BOOT_IMAGE=/boot/bzImage-517rc5
dma_debug=off dma_debug_entries=100", will be passed to user space.
and
Run /sbin/init as init process
with arguments:
/sbin/init
with environment:
HOME=/
TERM=linux
BOOT_IMAGE=/boot/bzImage-517rc5
dma_debug=off
dma_debug_entries=100
Return 1 from these __setup handlers to indicate that the command line
option has been handled.
Fixes: 59d3daafa1 ("dma-debug: add kernel command line parameters")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Igor Zhbanov <i.zhbanov@omprussia.ru>
Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: iommu@lists.linux-foundation.org
Cc: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Register its own handler for pci_error_handlers.reset_done and update
state accordingly.
Link: https://lore.kernel.org/all/20220224142024.147653-16-yishaih@nvidia.com
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Expose vfio_pci_core_aer_err_detected() to be used by drivers as part of
their pci_error_handlers structure.
Next patch for mlx5 driver will use it.
Link: https://lore.kernel.org/all/20220224142024.147653-15-yishaih@nvidia.com
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
This patch adds support for vfio_pci driver for mlx5 devices.
It uses vfio_pci_core to register to the VFIO subsystem and then
implements the mlx5 specific logic in the migration area.
The migration implementation follows the definition from uapi/vfio.h and
uses the mlx5 VF->PF command channel to achieve it.
This patch implements the suspend/resume flows.
Link: https://lore.kernel.org/all/20220224142024.147653-14-yishaih@nvidia.com
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Expose migration commands over the device, it includes: suspend, resume,
get vhca id, query/save/load state.
As part of this adds the APIs and data structure that are needed to manage
the migration data.
Link: https://lore.kernel.org/all/20220224142024.147653-13-yishaih@nvidia.com
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
v1 was never implemented and is replaced by v2.
The old uAPI documentation is removed from the header file.
The old uAPI definitions are still kept in the header file to ease
transition for userspace copying these headers. They will be fully
removed down the road.
Link: https://lore.kernel.org/all/20220224142024.147653-12-yishaih@nvidia.com
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
CONFIG_DMA_REMAP is used to build a few helpers around the core
vmalloc code, and to use them in case there is a highmem page in
dma-direct, and to make dma coherent allocations be able to use
non-contiguous pages allocations for DMA allocations in the dma-iommu
layer.
Right now it needs to be explicitly selected by architectures, and
is only done so by architectures that require remapping to deal
with devices that are not DMA coherent. Make it unconditional for
builds with CONFIG_MMU as it is very little extra code, but makes
it much more likely that large DMA allocations succeed on x86.
This fixes hot plugging a NVMe thunderbolt SSD for me, which tries
to allocate a 1MB buffer that is otherwise hard to obtain due to
memory fragmentation on a heavily used laptop.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
The RUNNING_P2P state is designed to support multiple devices in the same
VM that are doing P2P transactions between themselves. When in RUNNING_P2P
the device must be able to accept incoming P2P transactions but should not
generate outgoing P2P transactions.
As an optional extension to the mandatory states it is defined as
in between STOP and RUNNING:
STOP -> RUNNING_P2P -> RUNNING -> RUNNING_P2P -> STOP
For drivers that are unable to support RUNNING_P2P the core code
silently merges RUNNING_P2P and RUNNING together. Unless driver support
is present, the new state cannot be used in SET_STATE.
Drivers that support this will be required to implement 4 FSM arcs
beyond the basic FSM. 2 of the basic FSM arcs become combination
transitions.
Compared to the v1 clarification, NDMA is redefined into FSM states and is
described in terms of the desired P2P quiescent behavior, noting that
halting all DMA is an acceptable implementation.
Link: https://lore.kernel.org/all/20220224142024.147653-11-yishaih@nvidia.com
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Replace the existing region based migration protocol with an ioctl based
protocol. The two protocols have the same general semantic behaviors, but
the way the data is transported is changed.
This is the STOP_COPY portion of the new protocol, it defines the 5 states
for basic stop and copy migration and the protocol to move the migration
data in/out of the kernel.
Compared to the clarification of the v1 protocol Alex proposed:
https://lore.kernel.org/r/163909282574.728533.7460416142511440919.stgit@omen
This has a few deliberate functional differences:
- ERROR arcs allow the device function to remain unchanged.
- The protocol is not required to return to the original state on
transition failure. Instead userspace can execute an unwind back to
the original state, reset, or do something else without needing kernel
support. This simplifies the kernel design and should userspace choose
a policy like always reset, avoids doing useless work in the kernel
on error handling paths.
- PRE_COPY is made optional, userspace must discover it before using it.
This reflects the fact that the majority of drivers we are aware of
right now will not implement PRE_COPY.
- segmentation is not part of the data stream protocol, the receiver
does not have to reproduce the framing boundaries.
The hybrid FSM for the device_state is described as a Mealy machine by
documenting each of the arcs the driver is required to implement. Defining
the remaining set of old/new device_state transitions as 'combination
transitions' which are naturally defined as taking multiple FSM arcs along
the shortest path within the FSM's digraph allows a complete matrix of
transitions.
A new VFIO_DEVICE_FEATURE of VFIO_DEVICE_FEATURE_MIG_DEVICE_STATE is
defined to replace writing to the device_state field in the region. This
allows returning a brand new FD whenever the requested transition opens
a data transfer session.
The VFIO core code implements the new feature and provides a helper
function to the driver. Using the helper the driver only has to
implement 6 of the FSM arcs and the other combination transitions are
elaborated consistently from those arcs.
A new VFIO_DEVICE_FEATURE of VFIO_DEVICE_FEATURE_MIGRATION is defined to
report the capability for migration and indicate which set of states and
arcs are supported by the device. The FSM provides a lot of flexibility to
make backwards compatible extensions but the VFIO_DEVICE_FEATURE also
allows for future breaking extensions for scenarios that cannot support
even the basic STOP_COPY requirements.
The VFIO_DEVICE_FEATURE_MIG_DEVICE_STATE with the GET option (i.e.
VFIO_DEVICE_FEATURE_GET) can be used to read the current migration state
of the VFIO device.
Data transfer sessions are now carried over a file descriptor, instead of
the region. The FD functions for the lifetime of the data transfer
session. read() and write() transfer the data with normal Linux stream FD
semantics. This design allows future expansion to support poll(),
io_uring, and other performance optimizations.
The complicated mmap mode for data transfer is discarded as current qemu
doesn't take meaningful advantage of it, and the new qemu implementation
avoids substantially all the performance penalty of using a read() on the
region.
Link: https://lore.kernel.org/all/20220224142024.147653-10-yishaih@nvidia.com
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Invoke a new device op 'device_feature' to handle just the data array
portion of the command. This lifts the ioctl validation to the core code
and makes it simpler for either the core code, or layered drivers, to
implement their own feature values.
Provide vfio_check_feature() to consolidate checking the flags/etc against
what the driver supports.
Link: https://lore.kernel.org/all/20220224142024.147653-9-yishaih@nvidia.com
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Reviewed-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Krzysztof Kozlowski says:
====================
nfc: llcp: few cleanups/improvements
These are improvements, not fixing any experienced issue, just looking correct
to me from the code point of view.
Changes since v1
================
1. Split from the fix.
Testing
=======
Under QEMU only. The NFC/LLCP code was not really tested on a device.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
This reverts commit 17f7ae16ae.
The commit brought a new socket state LLCP_DISCONNECTING, which was
never set, only read, so socket could never set to such state.
Remove the dead code.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
nfc_llcp_sock_link() is called in all paths (bind/connect) as a last
action, still protected with lock_sock(). When cleaning up in
llcp_sock_release(), call nfc_llcp_sock_unlink() in a mirrored way:
earlier and still under the lock_sock().
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Use test_bit() instead of open-coding it, just like in other places
touching the bitmap.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Coding style encourages centralized exiting of functions, so rewrite
llcp_sock_bind() error paths to use such pattern. This reduces the
duplicated cleanup code, make success path visually shorter and also
cleans up the errors in proper order (in reversed way from
initialization).
No functional impact expected.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The llcp_sock_connect() error paths were using a mixed way of central
exit (goto) and cleanup
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Nullify the llcp_sock->dev on llcp_sock_connect() error paths,
symmetrically to the code llcp_sock_bind(). The non-NULL value of
llcp_sock->dev is used in a few places to check whether the socket is
still valid.
There was no particular issue observed with missing NULL assignment in
connect() error path, however a similar case - in the bind() error path
- was triggereable. That one was fixed in commit 4ac06a1e01 ("nfc:
fix NULL ptr dereference in llcp_sock_getname() after failed connect"),
so the change here seems logical as well.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel says:
====================
HW counters for soft devices
Petr says:
Offloading switch device drivers may be able to collect statistics of the
traffic taking place in the HW datapath that pertains to a certain soft
netdevice, such as a VLAN. In this patch set, add the necessary
infrastructure to allow exposing these statistics to the offloaded
netdevice in question, and add mlxsw offload.
Across HW platforms, the counter itself very likely constitutes a limited
resource, and the act of counting may have a performance impact. Therefore
this patch set makes the HW statistics collection opt-in and togglable from
userspace on a per-netdevice basis.
Additionally, HW devices may have various limiting conditions under which
they can realize the counter. Therefore it is also possible to query
whether the requested counter is realized by any driver. In TC parlance,
which is to a degree reused in this patch set, two values are recognized:
"request" tracks whether the user enabled collecting HW statistics, and
"used" tracks whether any HW statistics are actually collected.
In the past, this author has expressed the opinion that `a typical user
doing "ip -s l sh", including various scripts, wants to see the full
picture and not worry what's going on where'. While that would be nice,
unfortunately it cannot work:
- Packets that trap from the HW datapath to the SW datapath would be
double counted.
For a given netdevice, some traffic can be purely a SW artifact, and some
may flow through the HW object corresponding to the netdevice. But some
traffic can also get trapped to the SW datapath after bumping the HW
counter. It is not clear how to make sure double-counting does not occur
in the SW datapath in that case, while still making sure that possibly
divergent SW forwarding path gets bumped as appropriate.
So simply adding HW and SW stats may work roughly, most of the time, but
there are scenarios where the result is nonsensical.
- HW devices will have limitations as to what type of traffic they can
count.
In case of mlxsw, which is part of this patch set, there is no reasonable
way to count all traffic going through a certain netdevice, such as a
VLAN netdevice enslaved to a bridge. It is however very simple to count
traffic flowing through an L3 object, such as a VLAN netdevice with an IP
address.
Similarly for physical netdevices, the L3 object at which the counter is
installed is the subport carrying untagged traffic.
These are not "just counters". It is important that the user understands
what is being counted. It would be incorrect to conflate these statistics
with another existing statistics suite.
To that end, this patch set introduces a statistics suite called "L3
stats". This label should make it easy to understand what is being counted,
and to decide whether a given device can or cannot implement this suite for
some type of netdevice. At the same time, the code is written to make
future extensions easy, should a device pop up that can implement a
different flavor of statistics suite (say L2, or an address-family-specific
suite).
For example, using a work-in-progress iproute2[1], to turn on and then list
the counters on a VLAN netdevice:
# ip stats set dev swp1.200 l3_stats on
# ip stats show dev swp1.200 group offload subgroup l3_stats
56: swp1.200: group offload subgroup l3_stats on used on
RX: bytes packets errors dropped missed mcast
0 0 0 0 0 0
TX: bytes packets errors dropped carrier collsns
0 0 0 0 0 0
The patchset progresses as follows:
- Patch #1 is a cleanup.
- In patch #2, remove the assumption that all LINK_OFFLOAD_XSTATS are
dev-backed.
The only attribute defined under the nest is currently
IFLA_OFFLOAD_XSTATS_CPU_HIT. L3_STATS differs from CPU_HIT in that the
driver that supplies the statistics is not the same as the driver that
implements the netdevice. Make the code compatible with this in patch #2.
- In patch #3, add the possibility to filter inside nests.
The filter_mask field of RTM_GETSTATS header determines which
top-level attributes should be included in the netlink response. This
saves processing time by only including the bits that the user cares
about instead of always dumping everything. This is doubly important
for HW-backed statistics that would typically require a trip to the
device to fetch the stats. In this patch, the UAPI is extended to
allow filtering inside IFLA_STATS_LINK_OFFLOAD_XSTATS in particular,
but the scheme is easily extensible to other nests as well.
- In patch #4, propagate extack where we need it.
In patch #5, make it possible to propagate errors from drivers to the
user.
- In patch #6, add the in-kernel APIs for keeping track of the new stats
suite, and the notifiers that the core uses to communicate with the
drivers.
- In patch #7, add UAPI for obtaining the new stats suite.
- In patch #8, add a new UAPI message, RTM_SETSTATS, which will carry
the message to toggle the newly-added stats suite.
In patch #9, add the toggle itself.
At this point the core is ready for drivers to add support for the new
stats suite.
- In patches #10, #11 and #12, apply small tweaks to mlxsw code.
- In patch #13, add support for L3 stats, which are realized as RIF
counters.
- Finally in patch #14, a selftest is added to the net/forwarding
directory. Technically this is a HW-specific test, in that without a HW
implementing the counters, it just will not pass. But devices that
support L3 statistics at all are likely to be able to reuse this
selftest, so it seems appropriate to put it in the general forwarding
directory.
We also have a netdevsim implementation, and a corresponding selftest that
verifies specifically some of the core code. We intend to contribute these
later. Interested parties can take a look at the raw code at [2].
[1] https://github.com/pmachata/iproute2/commits/soft_counters
[2] https://github.com/pmachata/linux_mlxsw/commits/petrm_soft_counters_2
v2:
- Patch #3:
- Do not declare strict_start_type at the new policies, since they are
used with nla_parse_nested() (sans _deprecated).
- Use NLA_POLICY_NESTED to declare what the nest contents should be
- Use NLA_POLICY_MASK instead of BITFIELD32 for the filtering
attribute.
- Patch #6:
- s/monotonous/monotonic/ in commit message
- Use a newly-added struct rtnl_hw_stats64 for stats transfer
- Patch #7:
- Use a newly-added struct rtnl_hw_stats64 for stats transfer
- Patch #8:
- Do not declare strict_start_type at the new policies, since they are
used with nla_parse_nested() (sans _deprecated).
- Patch #13:
- Use a newly-added struct rtnl_hw_stats64 for stats transfer
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Add a test that verifies operation of L3 HW statistics.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Spectrum machines support L3 stats by binding a counter to a RIF, a
hardware object representing a router interface. Recognize the netdevice
notifier events, NETDEV_OFFLOAD_XSTATS_*, to support enablement,
disablement, and reporting back to core.
As a netdevice gains a RIF, if L3 stats are enabled, install the counters,
and ping the core so that a userspace notification can be emitted.
Similarly, as a netdevice loses a RIF, push the as-yet-unreported
statistics to the core, so that they are not lost, and ping the core to
emit userspace notification.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Several more events are coming in the following patches, and extending the
if statement is getting awkward. Instead, convert it to a switch.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The mlxsw_sp reference is carried by the mlxsw_sp_rif object that is passed
to these functions as well. Just deduce the former from the latter,
and drop the explicit mlxsw_sp parameter. Adapt callers.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The function mlxsw_reg_ritr_counter_pack() formats a register to configure
a router interface (RIF) counter. The parameter `egress' determines whether
an ingress or egress counter is to be configured. RITR, the register in
question, has two sets of counter-related fields: one for ingress, one for
egress. When setting values of the fields, the function sets the proper
counter index field, but when setting the counter type, it always sets the
egress field. Thus configuration of ingress counters is broken, and in fact
an attempt to configure an ingress counter mangles a previously configured
egress counter.
This was never discovered, because there is currently no way to enable
ingress counters on a router interface, only the egress one.
Fix in an obvious way.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The offloaded HW stats are designed to allow per-netdevice enablement and
disablement. Add an attribute, IFLA_STATS_SET_OFFLOAD_XSTATS_L3_STATS,
which should be carried by the RTM_SETSTATS message, and expresses a desire
to toggle L3 offload xstats on or off.
As part of the above, add an exported function rtnl_offload_xstats_notify()
that drivers can use when they have installed or deinstalled the counters
backing the HW stats.
At this point, it is possible to enable, disable and query L3 offload
xstats on netdevices. (However there is no driver actually implementing
these.)
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The offloaded HW stats are designed to allow per-netdevice enablement and
disablement. These stats are only accessible through RTM_GETSTATS, and
therefore should be toggled by a RTM_SETSTATS message. Add it, and the
necessary skeleton handler.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add a new IFLA_STATS_LINK_OFFLOAD_XSTATS child attribute,
IFLA_OFFLOAD_XSTATS_L3_STATS, to carry statistics for traffic that takes
place in a HW router.
The offloaded HW stats are designed to allow per-netdevice enablement and
disablement. Additionally, as a netdevice is configured, it may become or
cease being suitable for binding of a HW counter. Both of these aspects
need to be communicated to the userspace. To that end, add another child
attribute, IFLA_OFFLOAD_XSTATS_HW_S_INFO:
- attr nest IFLA_OFFLOAD_XSTATS_HW_S_INFO
- attr nest IFLA_OFFLOAD_XSTATS_L3_STATS
- attr IFLA_OFFLOAD_XSTATS_HW_S_INFO_REQUEST
- {0,1} as u8
- attr IFLA_OFFLOAD_XSTATS_HW_S_INFO_USED
- {0,1} as u8
Thus this one attribute is a nest that can be used to carry information
about various types of HW statistics, and indexing is very simply done by
wrapping the information for a given statistics suite into the attribute
that carries the suite is the RTM_GETSTATS query. At the same time, because
_HW_S_INFO is nested directly below IFLA_STATS_LINK_OFFLOAD_XSTATS, it is
possible through filtering to request only the metadata about individual
statistics suites, without having to hit the HW to get the actual counters.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Offloading switch device drivers may be able to collect statistics of the
traffic taking place in the HW datapath that pertains to a certain soft
netdevice, such as VLAN. Add the necessary infrastructure to allow exposing
these statistics to the offloaded netdevice in question. The API was shaped
by the following considerations:
- Collection of HW statistics is not free: there may be a finite number of
counters, and the act of counting may have a performance impact. It is
therefore necessary to allow toggling whether HW counting should be done
for any particular SW netdevice.
- As the drivers are loaded and removed, a particular device may get
offloaded and unoffloaded again. At the same time, the statistics values
need to stay monotonic (modulo the eventual 64-bit wraparound),
increasing only to reflect traffic measured in the device.
To that end, the netdevice keeps around a lazily-allocated copy of struct
rtnl_link_stats64. Device drivers then contribute to the values kept
therein at various points. Even as the driver goes away, the struct stays
around to maintain the statistics values.
- Different HW devices may be able to count different things. The
motivation behind this patch in particular is exposure of HW counters on
Nvidia Spectrum switches, where the only practical approach to counting
traffic on offloaded soft netdevices currently is to use router interface
counters, and count L3 traffic. Correspondingly that is the statistics
suite added in this patch.
Other devices may be able to measure different kinds of traffic, and for
that reason, the APIs are built to allow uniform access to different
statistics suites.
- Because soft netdevices and offloading drivers are only loosely bound, a
netdevice uses a notifier chain to communicate with the drivers. Several
new notifiers, NETDEV_OFFLOAD_XSTATS_*, have been added to carry messages
to the offloading drivers.
- Devices can have various conditions for when a particular counter is
available. As the device is configured and reconfigured, the device
offload may become or cease being suitable for counter binding. A
netdevice can use a notifier type NETDEV_OFFLOAD_XSTATS_REPORT_USED to
ping offloading drivers and determine whether anyone currently implements
a given statistics suite. This information can then be propagated to user
space.
When the driver decides to unoffload a netdevice, it can use a
newly-added function, netdev_offload_xstats_report_delta(), to record
outstanding collected statistics, before destroying the HW counter.
This patch adds a helper, call_netdevice_notifiers_info_robust(), for
dispatching a notifier with the possibility of unwind when one of the
consumers bails. Given the wish to eventually get rid of the global
notifier block altogether, this helper only invokes the per-netns notifier
block.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Obtaining stats for the IFLA_STATS_LINK_OFFLOAD_XSTATS nest involves a HW
access, and can fail for more reasons than just netlink message size
exhaustion. Therefore do not always return -EMSGSIZE on the failure path,
but respect the error code provided by the callee. Set the error explicitly
where it is reasonable to assume -EMSGSIZE as the failure reason.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Later patches add handlers for more HW-backed statistics. An extack will be
useful when communicating HW / driver errors to the client. Add the
arguments as appropriate.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The filter_mask field of RTM_GETSTATS header determines which top-level
attributes should be included in the netlink response. This saves
processing time by only including the bits that the user cares about
instead of always dumping everything. This is doubly important for
HW-backed statistics that would typically require a trip to the device to
fetch the stats.
So far there was only one HW-backed stat suite per attribute. However,
IFLA_STATS_LINK_OFFLOAD_XSTATS is a nest, and will gain a new stat suite in
the following patches. It would therefore be advantageous to be able to
filter within that nest, and select just one or the other HW-backed
statistics suite.
Extend rtnetlink so that RTM_GETSTATS permits attributes in the payload.
The scheme is as follows:
- RTM_GETSTATS
- struct if_stats_msg
- attr nest IFLA_STATS_GET_FILTERS
- attr IFLA_STATS_LINK_OFFLOAD_XSTATS
- u32 filter_mask
This scheme reuses the existing enumerators by nesting them in a dedicated
context attribute. This is covered by policies as usual, therefore a
gradual opt-in is possible. Currently only IFLA_STATS_LINK_OFFLOAD_XSTATS
nest has filtering enabled, because for the SW counters the issue does not
seem to be that important.
rtnl_offload_xstats_get_size() and _fill() are extended to observe the
requested filters.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The IFLA_STATS_LINK_OFFLOAD_XSTATS attribute is a nest whose child
attributes carry various special hardware statistics. The code that handles
this nest was written with the idea that all these statistics would be
exposed by the device driver of a physical netdevice.
In the following patches, a new attribute is added to the abovementioned
nest, which however can be defined for some soft netdevices. The NDO-based
approach to querying these does not work, because it is not the soft
netdevice driver that exposes these statistics, but an offloading NIC
driver that does so.
The current code does not scale well to this usage. Simply rewrite it back
to the pattern seen in other fill-like and get_size-like functions
elsewhere.
Extract to helpers the code that is concerned with handling specifically
NDO-backed statistics so that it can be easily reused should more such
statistics be added.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The currently used names rtnl_get_offload_stats() and
rtnl_get_offload_stats_size() do not clearly show the namespace. The former
function additionally seems to have been named this way in accordance with
the NDO name, as opposed to the naming used in the rtnetlink.c file (and
indeed elsewhere in the netlink handling code). As more and
differently-flavored attributes are introduced, a common clear prefix is
needed for all related functions.
Rename the functions to follow the rtnl_offload_xstats_* naming scheme.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There is only one "goto done;" in set_device_flags() and this happens
*before* hci_dev_lock() is called, move the done label to after the
hci_dev_unlock() to fix the following unlock balance:
[ 31.493567] =====================================
[ 31.493571] WARNING: bad unlock balance detected!
[ 31.493576] 5.17.0-rc2+ #13 Tainted: G C E
[ 31.493581] -------------------------------------
[ 31.493584] bluetoothd/685 is trying to release lock (&hdev->lock) at:
[ 31.493594] [<ffffffffc07603f5>] set_device_flags+0x65/0x1f0 [bluetooth]
[ 31.493684] but there are no more locks to release!
Note this bug has been around for a couple of years, but before
commit fe92ee6425 ("Bluetooth: hci_core: Rework hci_conn_params flags")
supported_flags was hardcoded to "((1U << HCI_CONN_FLAG_MAX) - 1)" so
the check for unsupported flags which does the "goto done;" never
triggered.
Fixes: fe92ee6425 ("Bluetooth: hci_core: Rework hci_conn_params flags")
Cc: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
D. Wythe says:
====================
fix unexpected SMC_CLC_DECL_ERR_REGRMB error
We can easily trigger the SMC_CLC_DECL_ERR_REGRMB exception within
following script:
server: smc_run nginx
client: smc_run ./wrk -c 2000 -t 8 -d 20 http://smc-server
And we can clearly see that this error is also divided into two types:
1. 0x09990003
2. 0x05000000/0x09990003
Which has the same root causes, but the immediate causes vary.
The root cause of this issues is that remove connections from link group
is not synchronous with add/delete rtoken entry, which means that even
the number of connections is less that SMC_RMBS_PER_LGR_MAX, it does not
mean that the connection can register rtoken successfully later. In
other words, the rtoken entry may released, This will cause an
unexpected SMC_CLC_DECL_ERR_REGRMB to be reported, and then this SMC
connections have to fallback to TCP.
This patch set handles two types of SMC_CLC_DECL_ERR_REGRMB exceptions
from different perspectives.
Patch 1: fix the 0x05000000/0x09990003 error.
Patch 2: fix the 0x09990003 error.
After those patches, there is no SMC_CLC_DECL_ERR_REGRMB exceptions in
my
test case any more.
v1 -> v2:
- add bugfix patch for SMC_CLC_DECL_ERR_REGRMB cause by server side
v2 -> v3:
- fix incorrect mail thread
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
