Johannes Berg [Thu, 28 May 2020 19:34:36 +0000 (21:34 +0200)]
mac80211: determine chandef from HE 6 GHz operation
Support connecting to HE 6 GHz APs and mesh networks on 6 GHz,
where the HT/VHT information is missing but instead the HE 6 GHz
band capability is present, and the 6 GHz Operation information
field is used to encode the channel configuration instead of the
HT/VHT operation elements.
Also add some other bits needed to connect to 6 GHz networks.
Johannes Berg [Thu, 28 May 2020 19:34:35 +0000 (21:34 +0200)]
mac80211: avoid using ext NSS high BW if not supported
If the AP advertises inconsistent data, namely it has CCFS1 or CCFS2,
but doesn't advertise support for 160/80+80 bandwidth or "Extended NSS
BW Support", then we cannot use any MCSes in the the higher bandwidth.
Thus, avoid connecting with higher bandwidth since it's less efficient
that way.
mac80211: build HE operation with 6 GHz oper information
Add 6 GHz operation information (IEEE 802.11ax/D6.0, Figure 9-787k)
while building HE operation element for non-HE AP. This field is used to
determine channel information in the absence of HT/VHT IEs.
Construct HE 6 GHz band capability element (IEEE 802.11ax/D6.0,
9.4.2.261) for association request and mesh beacon. The 6 GHz
capability information is passed by driver through iftypes caps.
Johannes Berg [Thu, 28 May 2020 19:34:31 +0000 (21:34 +0200)]
cfg80211: add and expose HE 6 GHz band capabilities
These capabilities cover what would otherwise be transported
in HT/VHT capabilities, but only a subset thereof that is
actually needed on 6 GHz with HE already present. Expose the
capabilities to userspace, drivers are expected to set them
as using the 6 GHz band (currently) requires HE capability.
Arend Van Spriel [Fri, 29 May 2020 09:41:43 +0000 (11:41 +0200)]
cfg80211: adapt to new channelization of the 6GHz band
The 6GHz band does not have regulatory approval yet, but things are
moving forward. However, that has led to a change in the channelization
of the 6GHz band which has been accepted in the 11ax specification. It
also fixes a missing MHZ_TO_KHZ() macro for 6GHz channels while at it.
This change is primarily thrown in to discuss how to deal with it.
I noticed ath11k adding 6G support with old channelization and ditto
for iw. It probably involves changes in hostapd as well.
Johannes Berg [Fri, 29 May 2020 12:04:27 +0000 (14:04 +0200)]
cfg80211: fix 6 GHz frequencies to kHz
The updates to change to kHz frequencies and the 6 GHz
additions evidently overlapped (or rather, I didn't see
it when applying the latter), so the 6 GHz is broken.
Fix this.
Hauke Mehrtens [Thu, 21 May 2020 20:14:22 +0000 (22:14 +0200)]
wireless: Use linux/stddef.h instead of stddef.h
When compiling inside the kernel include linux/stddef.h instead of
stddef.h. When I compile this header file in backports for power PC I
run into a conflict with ptrdiff_t. I was unable to reproduce this in
mainline kernel. I still would like to fix this problem in the kernel.
cfg80211: fix CFG82011_CRDA_SUPPORT still mentioning internal regdb
Back with commit e1d1f7fc5a9a (cfg80211: reg: remove support for
built-in regdb, 2015-10-15), support for using CFG80211_INTERNAL_REGDB
was removed in favor of loading the regulatory database as firmware
file. The documentation of CFG80211_CRDA_SUPPORT was not adjusted,
though, which is why it still mentions mentions the old way of loading
via the internal regulatory database.
Remove it so that the kernel option only mentions using the firmware
file.
Tamizh Chelvam [Wed, 13 May 2020 08:11:44 +0000 (13:41 +0530)]
nl80211: Add support to configure TID specific Tx rate configuration
This patch adds support to configure per TID Tx Rate configuration
through NL80211_TID_CONFIG_ATTR_TX_RATE* attributes. And it uses
nl80211_parse_tx_bitrate_mask api to validate the Tx rate mask.
Johannes Berg [Tue, 26 May 2020 08:31:33 +0000 (10:31 +0200)]
mac80211: allow SA-QUERY processing in userspace
As discussed with Mathy almost two years ago in
http://lore.kernel.org/r/20180806224857.14853-1-Mathy.Vanhoef@cs.kuleuven.be
we should let userspace process SA-QUERY frames if it
wants to, so that it can handle OCV (operating channel
validation) which mac80211 doesn't know how to.
Evidently I had been expecting Mathy to (re)send such a
patch, but he never did, perhaps expecting me to do it
after our discussion.
In any case, this came up now with OCV getting more
attention, so move the code around as discussed there
to let userspace handle it, and do it properly.
Markus Theil [Fri, 8 May 2020 14:42:00 +0000 (16:42 +0200)]
nl80211: add ability to report TX status for control port TX
This adds the necessary capabilities in nl80211 to allow drivers to
assign a cookie to control port TX frames (returned via extack in
the netlink ACK message of the command) and then later report the
frame's status.
mac80211: Replace zero-length array with flexible-array
The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:
struct foo {
int stuff;
struct boo array[];
};
By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.
Also, notice that, dynamic memory allocations won't be affected by
this change:
"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]
sizeof(flexible-array-member) triggers a warning because flexible array
members have incomplete type[1]. There are some instances of code in
which the sizeof operator is being incorrectly/erroneously applied to
zero-length arrays and the result is zero. Such instances may be hiding
some bugs. So, this work (flexible-array member conversions) will also
help to get completely rid of those sorts of issues.
cfg80211: Replace zero-length array with flexible-array
The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:
struct foo {
int stuff;
struct boo array[];
};
By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.
Also, notice that, dynamic memory allocations won't be affected by
this change:
"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]
sizeof(flexible-array-member) triggers a warning because flexible array
members have incomplete type[1]. There are some instances of code in
which the sizeof operator is being incorrectly/erroneously applied to
zero-length arrays and the result is zero. Such instances may be hiding
some bugs. So, this work (flexible-array member conversions) will also
help to get completely rid of those sorts of issues.
Thomas Pedersen [Thu, 30 Apr 2020 17:25:52 +0000 (10:25 -0700)]
nl80211: support scan frequencies in KHz
If the driver advertises NL80211_EXT_FEATURE_SCAN_FREQ_KHZ
userspace can omit NL80211_ATTR_SCAN_FREQUENCIES in favor
of an NL80211_ATTR_SCAN_FREQ_KHZ. To get scan results in
KHz userspace must also set the
NL80211_SCAN_FLAG_FREQ_KHZ.
This lets nl80211 remain compatible with older userspaces
while not requring and sending redundant (and potentially
incorrect) scan frequency sets.
Thomas Pedersen [Thu, 30 Apr 2020 17:25:51 +0000 (10:25 -0700)]
nl80211: add KHz frequency offset for most wifi commands
cfg80211 recently gained the ability to understand a
frequency offset component in KHz. Expose this in nl80211
through the new attributes NL80211_ATTR_WIPHY_FREQ_OFFSET,
NL80211_FREQUENCY_ATTR_OFFSET,
NL80211_ATTR_CENTER_FREQ1_OFFSET, and
NL80211_BSS_FREQUENCY_OFFSET.
These add support to send and receive a KHz offset
component with the following NL80211 commands:
If the driver advertises a band containing channels with
frequency offset, it must also verify support for
frequency offset channels in its cfg80211 ops, or return
an error.
Thomas Pedersen [Thu, 30 Apr 2020 17:25:50 +0000 (10:25 -0700)]
cfg80211: add KHz variants of frame RX API
Drivers may wish to report the RX frequency in units of
KHz. Provide cfg80211_rx_mgmt_khz() and wrap it with
cfg80211_rx_mgmt() so exisiting drivers which can't report
KHz anyway don't need to change. Add a similar wrapper for
cfg80211_report_obss_beacon() so the frequency units stay
somewhat consistent.
This doesn't actually change the nl80211 API yet.
Signed-off-by: Thomas Pedersen <thomas@adapt-ip.com> Link: https://lore.kernel.org/r/20200430172554.18383-2-thomas@adapt-ip.com
[fix mac80211 calling the non-khz version of obss beacon report,
drop trace point name changes] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Current rule for applying TID configuration for specific peer looks overly
complicated. No need to reject new TID configuration when override flag is
specified. Another call with the same TID configuration, but without
override flag, allows to apply new configuration anyway.
Use the same approach as for the 'all peers' case: if override flag is
specified, then reset existing TID configuration and immediately
apply a new one.
cfg80211: fix mask type in cfg80211_tid_cfg structure
TIDs mask type is u64 in wiphy settings and nl80211 processing, see:
- wiphy TIDs mask sizes in tid_config_support structure
- prepare driver command in parse_tid_conf
Use the same type for TIDs mask in cfg80211_tid_cfg.
Oleksij Rempel [Wed, 27 May 2020 05:08:43 +0000 (07:08 +0200)]
net: phy: at803x: add cable diagnostics support for ATH9331 and ATH8032
Add support for Atheros 100Base-T PHYs. The only difference seems to be
the ability to test 2 pairs instead of 4 and the lack of 1000Base-T
specific register.
Only the ATH9331 was tested with this patch.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 27 May 2020 06:22:28 +0000 (23:22 -0700)]
Merge branch 'Raw-PHY-TDR-data'
Andrew Lunn says:
====================
Raw PHY TDR data
Some ethernet PHYs allow access to raw TDR data in addition to summary
diagnostics information. Add support for retrieving this data via
netlink ethtool. The basic structure in the core is the same as for
normal phy diagnostics, the PHY driver simply uses different helpers
to fill the netlink message with different data.
There is a graphical tool under development, as well a ethtool(1)
which can dump the data as text and JSON.
A patched ethtool(1) can be found in
https://github.com/lunn/ethtool.git feature/cable-test-v5
Thanks for Chris Healy for lots of testing.
v2:
See the individual patches but:
Pass distances in centimeters, not meters
Allow the PHY to round distances to what it supports and report what
it actually used along with the results.
Make the Marvell PHY use steps a multiple of 0.805 meters, its native
step size.
v3:
Move the TDR configuration into a structure
Add a range check on step
Use NL_SET_ERR_MSG_ATTR() when appropriate
Move TDR configuration into a nest
Document attributes in the request
Unsquash the last two patches
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Lunn [Tue, 26 May 2020 22:21:43 +0000 (00:21 +0200)]
net: phy: marvell: Configure TDR pulse based on measurement length
When performing a TDR measurement for a short distance, the pulse
width should be low, to help differentiate between the outgoing pulse
and any reflection. For longer distances, the pulse should be wider,
to help with attenuation.
Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Lunn [Tue, 26 May 2020 22:21:42 +0000 (00:21 +0200)]
net : phy: marvell: Speedup TDR data retrieval by only changing page once
Getting the TDR data requires a large number of MDIO bus
transactions. The number can however be reduced if the page is only
changed once. Add the needed locking to allow this, and make use of
unlocked read/write methods where needed.
Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Lunn [Tue, 26 May 2020 22:21:41 +0000 (00:21 +0200)]
net: ethtool: Allow PHY cable test TDR data to configured
Allow the user to configure where on the cable the TDR data should be
retrieved, in terms of first and last sample, and the step between
samples. Also add the ability to ask for TDR data for just one pair.
If this configuration is not provided, it defaults to 1-150m at 1m
intervals for all pairs.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
v3:
Move the TDR configuration into a structure
Add a range check on step
Use NL_SET_ERR_MSG_ATTR() when appropriate
Move TDR configuration into a nest
Document attributes in the request
Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Lunn [Tue, 26 May 2020 22:21:40 +0000 (00:21 +0200)]
net: phy: marvell: Add support for amplitude graph
The Marvell PHYs can measure the amplitude of the returned signal for
a given distance. Implement this option of the cable test
infrastructure. When reporting the step, convert the distance into cm.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
v2:
Step based on the measurement resolution, and convert this to cm.
Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Lunn [Tue, 26 May 2020 22:21:38 +0000 (00:21 +0200)]
net: ethtool: Add generic parts of cable test TDR
Add the generic parts of the code used to trigger a cable test and
return raw TDR data. Any PHY driver which support this must implement
the new driver op.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
v2
Update nxp-tja11xx for API change.
Signed-off-by: David S. Miller <davem@davemloft.net>
Andrew Lunn [Tue, 26 May 2020 22:21:37 +0000 (00:21 +0200)]
net: ethtool: Add attributes for cable test TDR data
Some Ethernet PHYs can return the raw time domain reflectromatry data.
Add the attributes to allow this data to be requested and returned via
netlink ethtool.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
v2:
m -> cm
Report what the PHY actually used for start/stop/step.
Signed-off-by: David S. Miller <davem@davemloft.net>
Armin Wolf [Tue, 26 May 2020 18:03:02 +0000 (20:03 +0200)]
ne2k-pci: Fix various coding-style issues and improve printk() usage
Fixed a ton of minor checkpatch errors/warnings and remove version
printing at module init/when device is found and use MODULE_VERSION
instead. Also modifying the RTL8029 PCI string to include the compatible
RTL8029AS nic.
The only mayor issue remaining is the missing SPDX tag, but since the
exact version of the GPL is not stated anywhere inside the file, its
impossible to add such a tag at the moment.
But maybe it is possible, since 8390.h states Donald Becker's 8390
drivers are licensed under GPL 2.2 only (= GPL-2.0-only ?).
The kernel module containing this patch compiles and runs without
problems on a RTL8029AS-based NE2000 clone card with kernel 5.7.0-rc6.
Signed-off-by: Armin Wolf <W_Armin@gmx.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Ignore loopback-originatig packets soon enough and don't try to process L2
header where it doesn't exist. The very similar br_handle_frame() in bridge
code performs exactly the same check.
David S. Miller [Wed, 27 May 2020 03:33:59 +0000 (20:33 -0700)]
Merge branch 'mlxsw-Various-trap-changes-part-2'
Ido Schimmel says:
====================
mlxsw: Various trap changes - part 2
This patch set contains another set of small changes in mlxsw trap
configuration. It is the last set before exposing control traps (e.g.,
IGMP query, ARP request) via devlink-trap.
Tested with existing devlink-trap selftests. Please see individual
patches for a detailed changelog.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
The device has a trap for IPv6 packets that need be routed and have a
unicast link-local destination IP (i.e., fe80::/10). This allows mlxsw
to ignore link-local routes, as the packets will be trapped to the CPU
in any case.
However, since link-local routes are not programmed, it is possible for
routed packets to hit the default route which might also be programmed
to trap packets. This means that packets with a link-local destination
IP might be trapped for the wrong reason.
To overcome this, allow programming link-local prefix routes (usually
one fe80::/64 per-table), so that the packets will be forwarded until
reaching the link-local trap.
Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Mon, 25 May 2020 23:05:55 +0000 (02:05 +0300)]
mlxsw: spectrum: Add packet traps for BFD packets
Bidirectional Forwarding Detection (BFD) provides "low-overhead,
short-duration detection of failures in the path between adjacent
forwarding engines" (RFC 5880).
This is accomplished by exchanging BFD packets between the two
forwarding engines. Up until now these packets were trapped via the
general local delivery (i.e., IP2ME) trap which also traps a lot of
other packets that are not as time-sensitive as BFD packets.
Expose dedicated traps for BFD packets so that user space could
configure a dedicated policer for them.
Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Mon, 25 May 2020 23:05:54 +0000 (02:05 +0300)]
mlxsw: spectrum: Treat IPv6 link-local SIP as an exception
IPv6 packets that need to be forwarded and have a link-local source IP are
dropped by the kernel and an ICMPv6 "Destination unreachable" is sent to
the sending host.
As such, change the trap group of such packets so that they do not
interfere with IPv6 management packets. In the future this trap will be
exposed as an exception via devlink-trap.
Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Mon, 25 May 2020 23:05:53 +0000 (02:05 +0300)]
mlxsw: spectrum: Share one group for all locally delivered packets
Routed IP packets with the Router Alert option need to be trapped to
the CPU as they might need to be locally delivered to raw sockets with
the IP_ROUTER_ALERT / IPV6_ROUTER_ALERT socket option.
Move them to the same group with other packets that might need to be
trapped following route lookup.
Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Mon, 25 May 2020 23:05:51 +0000 (02:05 +0300)]
mlxsw: spectrum_trap: Do not hard code "thin" policer identifier
As explained in commit 2148dd33563e ("mlxsw: spectrum_trap: Introduce
dummy group with thin policer"), the purpose of the "thin" policer is to
pass as less packets as possible to the CPU.
The identifier of this policer is currently set according to the maximum
number of used trap groups, but this is fragile: On Spectrum-1 the
maximum number of policers is less than the maximum number of trap
groups, which might result in an invalid policer identifier in case the
number of used trap groups grows beyond the policer limit.
Solve this by dynamically allocating the policer identifier.
Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Mon, 25 May 2020 23:05:50 +0000 (02:05 +0300)]
mlxsw: switchx2: Move SwitchX-2 trap groups out of main enum
The number of Spectrum trap groups is not infinite, but two identifiers
are occupied by SwitchX-2 specific trap groups. Free these identifiers
by moving them out of the main enum.
Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Mon, 25 May 2020 23:05:48 +0000 (02:05 +0300)]
mlxsw: spectrum: Use same trap group for local routes and link-local destination
Packets with an IPv6 link-local destination (i.e., fe80::/10) should not
be forwarded and are therefore trapped to the CPU for local delivery.
Since these packets are trapped for the same logical reason as packets
hitting local routes, associate both traps with the same group.
Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Mon, 25 May 2020 23:05:47 +0000 (02:05 +0300)]
mlxsw: spectrum: Use separate trap group for FID miss
When a packet enters the device it is classified to a filtering
identifier (FID) based on the ingress port and VLAN. The FID miss trap
is used to trap packets for which a FID could not be found.
In mlxsw this trap should only be triggered when a port is enslaved to
an OVS bridge and a matching ACL rule could not be found, so as to
trigger learning.
These packets are therefore completely unrelated to packets hitting
local routes and should be in a different group. Move them.
Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Mon, 25 May 2020 23:05:45 +0000 (02:05 +0300)]
mlxsw: spectrum: Rename IPv6 ND trap group
The IPv6 Neighbour Discovery (ND) group will be used for various IPv6
packets, not all of which fall under the definition of ND, so rename it
to "IPV6" which is more appropriate.
Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel [Mon, 25 May 2020 23:05:43 +0000 (02:05 +0300)]
mlxsw: spectrum: Use dedicated trap group for ACL trap
Packets that are trapped via tc's trap action are currently subject to
the same policer as packets hitting local routes. The latter are
critical to the correct functioning of the control plane, while the
former are mainly used for traffic inspection.
Split the ACL trap to a separate group with its own policer. Use a
higher priority for these traps than for traps using mirror action
(e.g., ARP, IGMP). Otherwise, packets matching both traps will not be
forwarded in hardware (because of trap action) and also not forwarded in
software because they will be marked with 'offload_fwd_mark'.
Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
====================
net: ethernet: fec: move GPR register offset and bit into DT
The commit f7dfffb2a404 (net: fec: set GPR bit on suspend by
DT configuration) set the GPR reigster offset and bit in driver
for wol feature support.
It brings trouble to enable wol feature on imx6sx/imx6ul/imx7d
platforms that have multiple ethernet instances with different
GPR bit for stop mode control. So the patch set is to move GPR
register offset and bit define into DT, and enable imx6q/imx6dl
imx6qp/imx6sx/imx6ul/imx7d stop mode support.
imx6q/imx6dl/imx6qp sabresd board dts file miss the property
"fsl,magic-packet;", so patch#4 is to add the property for stop
mode support.
v1 -> v2:
- driver: switch back to store the quirks bitmask in driver_data
- dt-bindings: rename 'gpr' property string to 'fsl,stop-mode'
- imx6/7 dtsi: add imx6sx/imx6ul/imx7d ethernet stop mode property
v2 -> v3:
- driver: suggested by Sascha Hauer, use a struct fec_devinfo for
abstracting differences between different hardware variants,
it can give more freedom to describe the differences.
- imx6/7 dtsi: correct one typo pointed out by Andrew.
Thanks Martin, Andrew and Sascha Hauer for the review.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Fugang Duan [Mon, 25 May 2020 16:27:11 +0000 (00:27 +0800)]
dt-bindings: fec: update the gpr property
- rename the 'gpr' property string to 'fsl,stop-mode'.
- Update the property to define gpr register offset and
bit in DT, since different instance have different gpr bit.
v2:
* rename 'gpr' property string to 'fsl,stop-mode'.
Signed-off-by: Fugang Duan <fugang.duan@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Fugang Duan [Mon, 25 May 2020 16:27:10 +0000 (00:27 +0800)]
net: ethernet: fec: move GPR register offset and bit into DT
The commit f7dfffb2a404 (net: fec: set GPR bit on suspend by DT
configuration) set the GPR reigster offset and bit in driver for
wake on lan feature.
But it introduces two issues here:
- one SOC has two instances, they have different bit
- different SOCs may have different offset and bit
So to support wake-on-lan feature on other i.MX platforms, it should
configure the GPR reigster offset and bit from DT.
So the patch is to improve the commit f7dfffb2a404 (net: fec: set GPR
bit on suspend by DT configuration) to support multiple ethernet
instances on i.MX series.
v2:
* switch back to store the quirks bitmask in driver_data
v3:
* suggested by Sascha Hauer, use a struct fec_devinfo for
abstracting differences between different hardware variants,
it can give more freedom to describe the differences.
Signed-off-by: Fugang Duan <fugang.duan@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Wed, 27 May 2020 03:17:35 +0000 (20:17 -0700)]
Merge tag 'mac80211-next-for-net-next-2020-04-25' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
Johannes Berg says:
====================
One batch of changes, containing:
* hwsim improvements from Jouni and myself, to be able to
test more scenarios easily
* some more HE (802.11ax) support
* some initial S1G (sub 1 GHz) work for fractional MHz channels
* some (action) frame registration updates to help DPP support
* along with other various improvements/fixes
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
====================
net: phy: mscc-miim: reduce waiting time between MDIO transactions
This series aims at reducing the waiting time between MDIO transactions
when using the MSCC MIIM MDIO controller.
I'm not sure we need patch 4/4 and we could reasonably drop it from the
series. I'm including the patch as it could help to ensure the system
is functional with a non optimal configuration.
We needed to improve the driver's performances as when using a PHY
requiring lots of registers accesses (such as the VSC85xx family),
delays would add up and ended up to be quite large which would cause
issues such as: a slow initialization of the PHY, and issues when using
timestamping operations (this feature will be sent quite soon to the
mailing lists).
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Antoine Tenart [Tue, 26 May 2020 16:22:56 +0000 (18:22 +0200)]
net: phy: mscc-miim: read poll when high resolution timers are disabled
The driver uses a read polling mechanism to check the status of the MDIO
bus, to know if it is ready to accept next commands. This polling
mechanism uses usleep_delay() under the hood between reads which is fine
as long as high resolution timers are enabled. Otherwise the delays will
end up to be much longer than expected.
This patch fixes this by using udelay() under the hood when
CONFIG_HIGH_RES_TIMERS isn't enabled. This increases CPU usage.
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Antoine Tenart [Tue, 26 May 2020 16:22:55 +0000 (18:22 +0200)]
net: phy: mscc-miim: improve waiting logic
The MSCC MIIM MDIO driver uses a waiting logic to wait for the MDIO bus
to be ready to accept next commands. It does so by polling the BUSY
status bit which indicates the MDIO bus has completed all pending
operations. This can take time, and the controller supports writing the
next command as soon as there are no pending commands (which happens
while the MDIO bus is busy completing its current command).
This patch implements this improved logic by adding an helper to poll
the PENDING status bit, and by adjusting where we should wait for the
bus to not be busy or to not be pending.
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com> Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
readl_poll_timeout already returns -ETIMEDOUT if the condition isn't
satisfied, there's no need to check again the condition after calling
it. Remove the redundant timeout check.
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com> Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Antoine Tenart [Tue, 26 May 2020 16:22:53 +0000 (18:22 +0200)]
net: phy: mscc-miim: use more reasonable delays
The MSCC MIIM MDIO driver uses delays to read poll a status register. I
made multiple tests on a Ocelot PCS120 platform which led me to reduce
those delays. The delay in between which the polling function is allowed
to sleep is reduced from 100us to 50us which in almost all cases is a
good value to succeed at the first retry. The overall delay is also
lowered as the prior value was really way to high, 10000us is large
enough.
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com> Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Russell King [Tue, 26 May 2020 15:29:36 +0000 (16:29 +0100)]
net: mdiobus: add clause 45 mdiobus accessors
There is a recurring pattern throughout some of the PHY code converting
a devad and regnum to our packed clause 45 representation. Rather than
having this scattered around the code, let's put a common translation
function in mdio.h, and provide some register accessors.
Convert the phylib core, phylink, bcm87xx and cortina to use these.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 26 May 2020 22:22:58 +0000 (15:22 -0700)]
Merge branch 'flow-mpls'
Guillaume Nault says:
====================
flow_dissector, cls_flower: Add support for multiple MPLS Label Stack Entries
Currently, the flow dissector and the Flower classifier can only handle
the first entry of an MPLS label stack. This patch series generalises
the code to allow parsing and matching the Label Stack Entries that
follow.
Patch 1 extends the flow dissector to parse MPLS LSEs until the Bottom
Of Stack bit is reached. The number of parsed LSEs is capped at
FLOW_DIS_MPLS_MAX (arbitrarily set to 7). Flower and the NFP driver
are updated to take into account the new layout of struct
flow_dissector_key_mpls.
Patch 2 extends Flower. It defines new netlink attributes, which are
independent from the previous MPLS ones. Mixing the old and the new
attributes in a same filter is not allowed. For backward compatibility,
the old attributes are used when dumping filters that don't require the
new ones.
Changes since v2:
* Fix compilation with the new MLX5 bareudp tunnel code.
Changes since v1:
* Fix compilation of NFP driver (kbuild test robot).
* Fix sparse warning with entropy label (kbuild test robot).
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Guillaume Nault [Tue, 26 May 2020 12:29:04 +0000 (14:29 +0200)]
cls_flower: Support filtering on multiple MPLS Label Stack Entries
With struct flow_dissector_key_mpls now recording the first
FLOW_DIS_MPLS_MAX labels, we can extend Flower to filter on any of
these LSEs independently.
In order to avoid creating new netlink attributes for every possible
depth, let's define a new TCA_FLOWER_KEY_MPLS_OPTS nested attribute
that contains the list of LSEs to match. Each LSE is represented by
another attribute, TCA_FLOWER_KEY_MPLS_OPTS_LSE, which then contains
the attributes representing the depth and the MPLS fields to match at
this depth (label, TTL, etc.).
For each MPLS field, the mask is always set to all-ones, as this is
what the original API did. We could allow user configurable masks in
the future if there is demand for more flexibility.
The new API also allows to only specify an LSE depth. In that case,
Flower only verifies that the MPLS label stack depth is greater or
equal to the provided depth (that is, an LSE exists at this depth).
Filters that only match on one (or more) fields of the first LSE are
dumped using the old netlink attributes, to avoid confusing user space
programs that don't understand the new API.
Signed-off-by: Guillaume Nault <gnault@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
The current MPLS dissector only parses the first MPLS Label Stack
Entry (second LSE can be parsed too, but only to set a key_id).
This patch adds the possibility to parse several LSEs by making
__skb_flow_dissect_mpls() return FLOW_DISSECT_RET_PROTO_AGAIN as long
as the Bottom Of Stack bit hasn't been seen, up to a maximum of
FLOW_DIS_MPLS_MAX entries.
FLOW_DIS_MPLS_MAX is arbitrarily set to 7. This should be enough for
many practical purposes, without wasting too much space.
To record the parsed values, flow_dissector_key_mpls is modified to
store an array of stack entries, instead of just the values of the
first one. A bit field, "used_lses", is also added to keep track of
the LSEs that have been set. The objective is to avoid defining a
new FLOW_DISSECTOR_KEY_MPLS_XX for each level of the MPLS stack.
TC flower is adapted for the new struct flow_dissector_key_mpls layout.
Matching on several MPLS Label Stack Entries will be added in the next
patch.
The NFP and MLX5 drivers are also adapted: nfp_flower_compile_mac() and
mlx5's parse_tunnel() now verify that the rule only uses the first LSE
and fail if it doesn't.
Finally, the behaviour of the FLOW_DISSECTOR_KEY_MPLS_ENTROPY key is
slightly modified. Instead of recording the first Entropy Label, it
now records the last one. This shouldn't have any consequences since
there doesn't seem to have any user of FLOW_DISSECTOR_KEY_MPLS_ENTROPY
in the tree. We'd probably better do a hash of all parsed MPLS labels
instead (excluding reserved labels) anyway. That'd give better entropy
and would probably also simplify the code. But that's not the purpose
of this patch, so I'm keeping that as a future possible improvement.
Signed-off-by: Guillaume Nault <gnault@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 26 May 2020 22:16:52 +0000 (15:16 -0700)]
Merge branch 'tipc-add-some-improvements'
Tuong Lien says:
====================
tipc: add some improvements
This series adds some improvements to TIPC.
The first patch improves the TIPC broadcast's performance with the 'Gap
ACK blocks' mechanism similar to unicast before, while the others give
support on tracing & statistics for broadcast links, and an alternative
to carry broadcast retransmissions via unicast which might be useful in
some cases.
Besides, the Nagle algorithm can now automatically 'adjust' itself
depending on the specific network condition a stream connection runs by
the last patch.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Tuong Lien [Tue, 26 May 2020 09:38:38 +0000 (16:38 +0700)]
tipc: add test for Nagle algorithm effectiveness
When streaming in Nagle mode, we try to bundle small messages from user
as many as possible if there is one outstanding buffer, i.e. not ACK-ed
by the receiving side, which helps boost up the overall throughput. So,
the algorithm's effectiveness really depends on when Nagle ACK comes or
what the specific network latency (RTT) is, compared to the user's
message sending rate.
In a bad case, the user's sending rate is low or the network latency is
small, there will not be many bundles, so making a Nagle ACK or waiting
for it is not meaningful.
For example: a user sends its messages every 100ms and the RTT is 50ms,
then for each messages, we require one Nagle ACK but then there is only
one user message sent without any bundles.
In a better case, even if we have a few bundles (e.g. the RTT = 300ms),
but now the user sends messages in medium size, then there will not be
any difference at all, that says 3 x 1000-byte data messages if bundled
will still result in 3 bundles with MTU = 1500.
When Nagle is ineffective, the delay in user message sending is clearly
wasted instead of sending directly.
Besides, adding Nagle ACKs will consume some processor load on both the
sending and receiving sides.
This commit adds a test on the effectiveness of the Nagle algorithm for
an individual connection in the network on which it actually runs.
Particularly, upon receipt of a Nagle ACK we will compare the number of
bundles in the backlog queue to the number of user messages which would
be sent directly without Nagle. If the ratio is good (e.g. >= 2), Nagle
mode will be kept for further message sending. Otherwise, we will leave
Nagle and put a 'penalty' on the connection, so it will have to spend
more 'one-way' messages before being able to re-enter Nagle.
In addition, the 'ack-required' bit is only set when really needed that
the number of Nagle ACKs will be reduced during Nagle mode.
Testing with benchmark showed that with the patch, there was not much
difference in throughput for small messages since the tool continuously
sends messages without a break, so Nagle would still take in effect.
Acked-by: Ying Xue <ying.xue@windriver.com> Acked-by: Jon Maloy <jmaloy@redhat.com> Signed-off-by: Tuong Lien <tuong.t.lien@dektech.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Tuong Lien [Tue, 26 May 2020 09:38:37 +0000 (16:38 +0700)]
tipc: add support for broadcast rcv stats dumping
This commit enables dumping the statistics of a broadcast-receiver link
like the traditional 'broadcast-link' one (which is for broadcast-
sender). The link dumping can be triggered via netlink (e.g. the
iproute2/tipc tool) by the link flag - 'TIPC_NLA_LINK_BROADCAST' as the
indicator.
The name of a broadcast-receiver link of a specific peer will be in the
format: 'broadcast-link:<peer-id>'.
In addition, the broadcast-receiver link statistics can be reset in the
usual way via netlink by specifying that link name in command.
Note: the 'tipc_link_name_ext()' is removed because the link name can
now be retrieved simply via the 'l->name'.
Acked-by: Ying Xue <ying.xue@windriver.com> Acked-by: Jon Maloy <jmaloy@redhat.com> Signed-off-by: Tuong Lien <tuong.t.lien@dektech.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Tuong Lien [Tue, 26 May 2020 09:38:36 +0000 (16:38 +0700)]
tipc: enable broadcast retrans via unicast
In some environment, broadcast traffic is suppressed at high rate (i.e.
a kind of bandwidth limit setting). When it is applied, TIPC broadcast
can still run successfully. However, when it comes to a high load, some
packets will be dropped first and TIPC tries to retransmit them but the
packet retransmission is intentionally broadcast too, so making things
worse and not helpful at all.
This commit enables the broadcast retransmission via unicast which only
retransmits packets to the specific peer that has really reported a gap
i.e. not broadcasting to all nodes in the cluster, so will prevent from
being suppressed, and also reduce some overheads on the other peers due
to duplicates, finally improve the overall TIPC broadcast performance.
Note: the functionality can be turned on/off via the sysctl file:
Default is '0', i.e. the broadcast retransmission still works as usual.
Acked-by: Ying Xue <ying.xue@windriver.com> Acked-by: Jon Maloy <jmaloy@redhat.com> Signed-off-by: Tuong Lien <tuong.t.lien@dektech.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Tuong Lien [Tue, 26 May 2020 09:38:35 +0000 (16:38 +0700)]
tipc: add back link trace events
In the previous commit ("tipc: add Gap ACK blocks support for broadcast
link"), we have removed the following link trace events due to the code
changes:
- tipc_link_bc_ack
- tipc_link_retrans
This commit adds them back along with some minor changes to adapt to
the new code.
Acked-by: Ying Xue <ying.xue@windriver.com> Acked-by: Jon Maloy <jmaloy@redhat.com> Signed-off-by: Tuong Lien <tuong.t.lien@dektech.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Tuong Lien [Tue, 26 May 2020 09:38:34 +0000 (16:38 +0700)]
tipc: introduce Gap ACK blocks for broadcast link
As achieved through commit c681e8017679 ("tipc: improve TIPC throughput
by Gap ACK blocks"), we apply the same mechanism for the broadcast link
as well. The 'Gap ACK blocks' data field in a 'PROTOCOL/STATE_MSG' will
consist of two parts built for both the broadcast and unicast types:
We also increase the max number of Gap ACK blocks to 128, allowing upto
64 blocks per type (total buffer size = 516 bytes).
Besides, the 'tipc_link_advance_transmq()' function is refactored which
is applicable for both the unicast and broadcast cases now, so some old
functions can be removed and the code is optimized.
With the patch, TIPC broadcast is more robust regardless of packet loss
or disorder, latency, ... in the underlying network. Its performance is
boost up significantly.
For example, experiment with a 5% packet loss rate results:
$ time tipc-pipe --mc --rdm --data_size 123 --data_num 1500000
real 0m 42.46s
user 0m 1.16s
sys 0m 17.67s
Without the patch:
$ time tipc-pipe --mc --rdm --data_size 123 --data_num 1500000
real 8m 27.94s
user 0m 0.55s
sys 0m 2.38s
Acked-by: Ying Xue <ying.xue@windriver.com> Acked-by: Jon Maloy <jmaloy@redhat.com> Signed-off-by: Tuong Lien <tuong.t.lien@dektech.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Yuval Basson [Tue, 26 May 2020 06:41:20 +0000 (09:41 +0300)]
qed: Add EDPM mode type for user-fw compatibility
In older FW versions the completion flag was treated as the ack flag in
edpm messages. Expose the FW option of setting which mode the QP is in
by adding a flag to the qedr <-> qed API.
Flag is added for backward compatibility with libqedr.
This flag will be set by qedr after determining whether the libqedr is
using the updated version.
Fixes: 20cdcc5122df ("qed: Add support for QP verbs") Signed-off-by: Yuval Basson <yuval.bason@marvell.com> Signed-off-by: Michal Kalderon <michal.kalderon@marvell.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Tue, 26 May 2020 03:15:24 +0000 (20:15 -0700)]
tcp: tcp_v4_err() icmp skb is named icmp_skb
I missed the fact that tcp_v4_err() differs from tcp_v6_err().
After commit e182eb83c960 ("Rename skb to icmp_skb in tcp_v4_err()")
the skb argument has been renamed to icmp_skb only in one function.
I will in a future patch reconciliate these functions to avoid
this kind of confusion.
Fixes: c65e820c85fe ("tcp: allow traceroute -Mtcp for unpriv users") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Sven Eckelmann [Mon, 25 Nov 2019 09:46:50 +0000 (10:46 +0100)]
batman-adv: Revert "disable ethtool link speed detection when auto negotiation off"
The commit 341ea390762f ("batman-adv: disable ethtool link speed detection
when auto negotiation off") disabled the usage of ethtool's link_ksetting
when auto negotation was enabled due to invalid values when used with
tun/tap virtual net_devices. According to the patch, automatic measurements
should be used for these kind of interfaces.
But there are major flaws with this argumentation:
* automatic measurements are not implemented
* auto negotiation has nothing to do with the validity of the retrieved
values
The first point has to be fixed by a longer patch series. The "validity"
part of the second point must be addressed in the same patch series by
dropping the usage of ethtool's link_ksetting (thus always doing automatic
measurements over ethernet).
Drop the patch again to have more default values for various net_device
types/configurations. The user can still overwrite them using the
batadv_hardif's BATADV_ATTR_THROUGHPUT_OVERRIDE.
Reported-by: Matthias Schiffer <mschiffer@universe-factory.net> Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Horatiu Vultur [Mon, 25 May 2020 09:55:41 +0000 (09:55 +0000)]
bridge: mrp: Fix out-of-bounds read in br_mrp_parse
The issue was reported by syzbot. When the function br_mrp_parse was
called with a valid net_bridge_port, the net_bridge was an invalid
pointer. Therefore the check br->stp_enabled could pass/fail
depending where it was pointing in memory.
The fix consists of setting the net_bridge pointer if the port is a
valid pointer.
Reported-by: syzbot+9c6f0f1f8e32223df9a4@syzkaller.appspotmail.com Fixes: c81211ee2e45 ("bridge: mrp: Integrate MRP into the bridge") Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com> Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Wang Wenhu [Mon, 25 May 2020 06:29:51 +0000 (23:29 -0700)]
drivers: ipa: print dev_err info accurately
Print certain name string instead of hard-coded "memory" for dev_err
output, which would be more accurate and helpful for debugging.
Signed-off-by: Wang Wenhu <wenhu.wang@vivo.com> Cc: Alex Elder <elder@kernel.org> Reviewed-by: Alex Elder <elder@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Richard Cochran [Sun, 24 May 2020 18:27:10 +0000 (11:27 -0700)]
ptp_clock: Let the ADJ_OFFSET interface respect the ADJ_NANO flag for PHC devices.
In commit 59e25482dd7119e095a3ee10a3852b0572ef6b9c ("ptp: Add adjphase
function to support phase offset control.") the PTP Hardware Clock
interface expanded to support the ADJ_OFFSET offset mode. However,
the implementation did not respect the traditional yet pedantic
distinction between units of microseconds and nanoseconds signaled by
the ADJ_NANO flag. This patch fixes the issue by adding logic to
handle that flag.
Signed-off-by: Richard Cochran <richardcochran@gmail.com> Reviewed-by: Vincent Cheng <vincent.cheng.xh@renesas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Sun, 24 May 2020 18:00:02 +0000 (11:00 -0700)]
tcp: allow traceroute -Mtcp for unpriv users
Unpriv users can use traceroute over plain UDP sockets, but not TCP ones.
$ traceroute -Mtcp 8.8.8.8
You do not have enough privileges to use this traceroute method.
$ traceroute -n -Mudp 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 60 byte packets
1 192.168.86.1 3.631 ms 3.512 ms 3.405 ms
2 10.1.10.1 4.183 ms 4.125 ms 4.072 ms
3 96.120.88.125 20.621 ms 19.462 ms 20.553 ms
4 96.110.177.65 24.271 ms 25.351 ms 25.250 ms
5 69.139.199.197 44.492 ms 43.075 ms 44.346 ms
6 68.86.143.93 27.969 ms 25.184 ms 25.092 ms
7 96.112.146.18 25.323 ms 96.112.146.22 25.583 ms 96.112.146.26 24.502 ms
8 72.14.239.204 24.405 ms 74.125.37.224 16.326 ms 17.194 ms
9 209.85.251.9 18.154 ms 209.85.247.55 14.449 ms 209.85.251.9 26.296 ms^C
We can easily support traceroute over TCP, by queueing an error message
into socket error queue.
Note that applications need to set IP_RECVERR/IPV6_RECVERR option to
enable this feature, and that the error message is only queued
while in SYN_SNT state.
Suggested-by: Maciej Żenczykowski <maze@google.com Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Willem de Bruijn <willemb@google.com> Reviewed-by: Maciej Żenczykowski <maze@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Sat, 23 May 2020 19:46:49 +0000 (12:46 -0700)]
bnx2x: allow bnx2x_bsc_read() to schedule
bnx2x_warpcore_read_sfp_module_eeprom() can call bnx2x_bsc_read()
three times before giving up.
This causes latency blips of at least 31 ms (58 ms being reported
by our teams)
Convert the long lasting loops of udelay() to usleep_range() ones,
and breaks the loops on precise time tracking.
Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Ariel Elior <aelior@marvell.com> Cc: Sudarsana Kalluru <skalluru@marvell.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Dan Carpenter [Sat, 23 May 2020 17:46:48 +0000 (20:46 +0300)]
ipv4: potential underflow in compat_ip_setsockopt()
The value of "n" is capped at 0x1ffffff but it checked for negative
values. I don't think this causes a problem but I'm not certain and
it's harmless to prevent it.
Fixes: 5b6d191426cd ("ipv4: do compat setsockopt for MCAST_MSFILTER directly") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
projects / kernel.git / log