Tal Gilboa [Wed, 21 Mar 2018 18:33:45 +0000 (20:33 +0200)]
Documentation/networking: Add net DIM documentation
Net DIM is a generic algorithm, purposed for dynamically
optimizing network devices interrupt moderation. This
document describes how it works and how to use it.
David S. Miller [Thu, 22 Mar 2018 18:44:11 +0000 (14:44 -0400)]
Merge branch 'tipc-diag'
GhantaKrishnamurthy MohanKrishna says:
====================
tipc: socket diagnostics additions for AF_TIPC
The following patchsets add socket diagnostics support for AF_TIPC by
using the sock diag framework. The patchset was created on top of
commit id: fb66cb0.
New iproute2 package is needed to use this functionality which will
be sent for review in a seperate mail.
The commit series improves diagnosis of tipc sockets by exporting the
configuration, states and statistics of sockets.
The series has been co-authored by Parthasarathy Bhuvaragan and
consist of two parts:
1-2: Adaptations of existing code to support sock_diag framework.
We modify existing functions to support socket diagnostics. Required
information about the sockets are exported.
3: Step sk_drops during packet drop.
This occurs if the packet cannot be queued due to queue length exceeding
configured thresholds.
The diag module is optional, and if enabled it will be loaded on demand
when needed.
====================
Currently when tipc is unable to queue a received message on a
socket, the message is rejected back to the sender with error
TIPC_ERR_OVERLOAD. However, the application on this socket
has no knowledge about these discards.
In this commit, we try to step the sk_drops counter when tipc
is unable to queue a received message. Export sk_drops
using tipc socket diagnostics.
This commit adds socket diagnostics capability for AF_TIPC in netlink
family NETLINK_SOCK_DIAG in a new kernel module (diag.ko).
The following are key design considerations:
- config TIPC_DIAG has default y, like INET_DIAG.
- only requests with flag NLM_F_DUMP is supported (dump all).
- tipc_sock_diag_req message is introduced to send filter parameters.
- the response attributes are of TLV, some nested.
To avoid exposing data structures between diag and tipc modules and
avoid code duplication, the following additions are required:
- export tipc_nl_sk_walk function to reuse socket iterator.
- export tipc_sk_fill_sock_diag to fill the tipc diag attributes.
- create a sock_diag response message in __tipc_add_sock_diag defined
in diag.c and use the above exported tipc_sk_fill_sock_diag
to fill response.
The current socket iterator function tipc_nl_sk_dump, handles socket
locks and calls __tipc_nl_add_sk for each socket.
To reuse this logic in sock_diag implementation, we do minor
modifications to make these functions generic as described below.
In this commit, we add a two new functions __tipc_nl_sk_walk,
__tipc_nl_add_sk_info and modify tipc_nl_sk_dump, __tipc_nl_add_sk
accordingly.
In __tipc_nl_sk_walk we:
1. acquire and release socket locks
2. for each socket, execute the specified callback function
In __tipc_nl_add_sk we:
- Move the netlink attribute insertion to __tipc_nl_add_sk_info.
tipc_nl_sk_dump calls tipc_nl_sk_walk with __tipc_nl_add_sk as argument.
sock_diag will use these generic functions in a later commit.
Dan Carpenter [Wed, 21 Mar 2018 08:09:01 +0000 (11:09 +0300)]
macsec: missing dev_put() on error in macsec_newlink()
We moved the dev_hold(real_dev); call earlier in the function but forgot
to update the error paths.
Fixes: 0759e552bce7 ("macsec: fix negative refcnt on parent link") Signed-off-by: Dan Carpenter <[email protected]> Signed-off-by: David S. Miller <[email protected]>
David S. Miller [Thu, 22 Mar 2018 17:19:10 +0000 (13:19 -0400)]
Merge tag 'mac80211-for-davem-2018-03-21' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
Johannes Berg says:
====================
Two more fixes (in three patches):
* ath9k_htc doesn't like QoS NDP frames, use regular ones
* hwsim: set up wmediumd for radios created later
====================
====================
mlxsw: Update supported firmware version
The first patch bumps the firmware version supported by the driver. The
second patch enables a feature introduced in the new version,
auto-negotiation disable.
====================
Tal Bar [Wed, 21 Mar 2018 07:34:06 +0000 (09:34 +0200)]
mlxsw: spectrum: Add support for auto-negotiation disable mode
In 'auto-neg off' the device have sent AN (auto-negotiation) frames
with the forced speed. Thus, fix it using an_disable_admin field in
Port type and speed (PTYS) register. This field indicates if speed
negotiation frames would be send by the port or not.
Add the field and enable/disable it for 'auto-neg on/off', make the
port to start/stop sending AN (auto-negotiation) frames. Note that for
SwitchX2 the behavior doesn't change (i.e support only AN enabled with
forced speed).
David S. Miller [Thu, 22 Mar 2018 17:12:03 +0000 (13:12 -0400)]
Merge branch 'fix-some-bugs-for-HNS3-driver'
Peng Li says:
====================
fix some bugs for HNS3 driver
This patchset fixes some bugs for HNS3 driver:
[Patch 1/11 - 5/11] fix various bugs reported by hisilicon test team.
[Patch 6/11 - 7/11] fix bugs about interrupt coalescing self-adaptive
function.
[Patch 8/11 - 11/11] fix bugs about ethtool_ops.get_link_ksettings.
====================
Fuyun Liang [Wed, 21 Mar 2018 07:49:30 +0000 (15:49 +0800)]
net: hns3: fix for not returning problem in get_link_ksettings when phy exists
When phy exists, phy_ethtool_ksettings_get function is enough to get the
link ksettings. If the phy exists, get_link_ksettings function can return
directly after phy_ethtool_ksettings_get is called.
Fuyun Liang [Wed, 21 Mar 2018 07:49:26 +0000 (15:49 +0800)]
net: hns3: change the time interval of int_gl calculating
Since we change the update rate of int_gl from every interrupt to every
one hundred interrupts, the old way to get time interval by int_gl value
is not accurate. This patch calculates the time interval using the jiffies
value.
Fuyun Liang [Wed, 21 Mar 2018 07:49:25 +0000 (15:49 +0800)]
net: hns3: change GL update rate
The interrupt coalescing self-adaptive function updates the int_gl every
interrupt. The GL update rate is too faster to get a better new GL value.
This patch changes the GL update rate to every one hundred interrupts.
The GL update rate is defined by HNS3_INT_ADAPT_DOWN_START.
Yunsheng Lin [Wed, 21 Mar 2018 07:49:23 +0000 (15:49 +0800)]
net: hns3: export pci table of hclge and hclgevf to userspace
There is no module that is dependent on hclge or hclgevf's symbol,
but hns_enet need them to provide ops for it to run. When there is
a need to auto load the hns3 driver, the auto load will fail because
hclge or hclgevf is not loaded.
Hns_enet has already exported the pci table, so this patch exports
the pci table for hclge and hclgevf module too.
Peng Li [Wed, 21 Mar 2018 07:49:21 +0000 (15:49 +0800)]
net: hns3: fix the VF queue reset flow error
VF queue reset flow is different from PF queue reset flow.
VF driver should stop VF queue first, then send message to PF
and PF do the reset. PF should send a response to VF after
PF complete the queue reset, VF can initialize the queue hw
after get the response.
This patch fixes the VF queue reset flow as the correct step.
Fuyun Liang [Wed, 21 Mar 2018 07:49:20 +0000 (15:49 +0800)]
net: hns3: reallocate tx/rx buffer after changing mtu
When changing the mtu, the max frame size also will be changed. The tx
buffer size and the rx buffer size to be allocated are determined by max
frame size. So when max frame size is changed, the tx buffer and rx buffer
need to be reallocated.
When the tc_num is changed, the tx buffer and rx buffer need to be
reallocated too. So calling set_mtu and buffer_alloc separately is better.
Florian Fainelli [Wed, 21 Mar 2018 00:31:10 +0000 (17:31 -0700)]
net: dsa: Fix functional dsa-loop dependency on FIXED_PHY
We have a functional dependency on the FIXED_PHY MDIO bus because we register
fixed PHY devices "the old way" which only works if the code that does this has
had a chance to run before the fixed MDIO bus is probed. Make sure we account
for that and have dsa_loop_bdinfo.o be either built-in or modular depending on
whether CONFIG_FIXED_PHY reflects that too.
Fixes: 98cd1552ea27 ("net: dsa: Mock-up driver") Signed-off-by: Florian Fainelli <[email protected]> Signed-off-by: David S. Miller <[email protected]>
====================
hv_netvsc: fix races during shutdown and changes
This set of patches fixes issues identified by Vitaly Kuznetsov and
Mohammed Gamal related to state changes in Hyper-v network driver.
A lot of the issues are because setting up the netvsc device requires
a second step (in work queue) to get all the sub-channels running.
====================
Make common function for detaching internals of device
during changes to MTU and RSS. Make sure no more packets
are transmitted and all packets have been received before
doing device teardown.
Change the wait logic to be common and use usleep_range().
Changes transmit enabling logic so that transmit queues are disabled
during the period when lower device is being changed. And enabled
only after sub channels are setup. This avoids issue where it could
be that a packet was being sent while subchannel was not initialized.
Fixes: 8195b1396ec8 ("hv_netvsc: fix deadlock on hotplug") Signed-off-by: Stephen Hemminger <[email protected]> Signed-off-by: David S. Miller <[email protected]>
hv_netvsc: change GPAD teardown order on older versions
On older versions of Windows, the host ignores messages after
vmbus channel is closed.
Workaround this by doing what Windows does and send the teardown
before close on older versions of NVSP protocol.
Reported-by: Mohammed Gamal <[email protected]> Fixes: 0cf737808ae7 ("hv_netvsc: netvsc_teardown_gpadl() split") Signed-off-by: Stephen Hemminger <[email protected]> Signed-off-by: David S. Miller <[email protected]>
hv_netvsc: use RCU to fix concurrent rx and queue changes
The receive processing may continue to happen while the
internal network device state is in RCU grace period.
The internal RNDIS structure is associated with the
internal netvsc_device structure; both have the same
RCU lifetime.
Defer freeing all associated parts until after grace
period.
Fixes: 0cf737808ae7 ("hv_netvsc: netvsc_teardown_gpadl() split") Signed-off-by: Stephen Hemminger <[email protected]> Signed-off-by: David S. Miller <[email protected]>
This makes sure that no CPU is still process packets when
the channel is closed.
Fixes: 76bb5db5c749 ("netvsc: fix use after free on module removal") Signed-off-by: Stephen Hemminger <[email protected]> Signed-off-by: David S. Miller <[email protected]>
David Ahern [Tue, 20 Mar 2018 17:06:59 +0000 (10:06 -0700)]
net/ipv6: Handle onlink flag with multipath routes
For multipath routes the ONLINK flag can be specified per nexthop in
rtnh_flags or globally in rtm_flags. Update ip6_route_multipath_add
to consider the ONLINK setting coming from rtnh_flags. Each loop over
nexthops the config for the sibling route is initialized to the global
config and then per nexthop settings overlayed. The flag is 'or'ed into
fib6_config to handle the ONLINK flag coming from either rtm_flags or
rtnh_flags.
Fixes: fc1e64e1092f ("net/ipv6: Add support for onlink flag") Signed-off-by: David Ahern <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Guillaume Nault [Tue, 20 Mar 2018 15:49:26 +0000 (16:49 +0100)]
ppp: avoid loop in xmit recursion detection code
We already detect situations where a PPP channel sends packets back to
its upper PPP device. While this is enough to avoid deadlocking on xmit
locks, this doesn't prevent packets from looping between the channel
and the unit.
The problem is that ppp_start_xmit() enqueues packets in ppp->file.xq
before checking for xmit recursion. Therefore, __ppp_xmit_process()
might dequeue a packet from ppp->file.xq and send it on the channel
which, in turn, loops it back on the unit. Then ppp_start_xmit()
queues the packet back to ppp->file.xq and __ppp_xmit_process() picks
it up and sends it again through the channel. Therefore, the packet
will loop between __ppp_xmit_process() and ppp_start_xmit() until some
other part of the xmit path drops it.
For L2TP, we rapidly fill the skb's headroom and pppol2tp_xmit() drops
the packet after a few iterations. But PPTP reallocates the headroom
if necessary, letting the loop run and exhaust the machine resources
(as reported in https://bugzilla.kernel.org/show_bug.cgi?id=199109).
Fix this by letting __ppp_xmit_process() enqueue the skb to
ppp->file.xq, so that we can check for recursion before adding it to
the queue. Now ppp_xmit_process() can drop the packet when recursion is
detected.
__ppp_channel_push() is a bit special. It calls __ppp_xmit_process()
without having any actual packet to send. This is used by
ppp_output_wakeup() to re-enable transmission on the parent unit (for
implementations like ppp_async.c, where the .start_xmit() function
might not consume the skb, leaving it in ppp->xmit_pending and
disabling transmission).
Therefore, __ppp_xmit_process() needs to handle the case where skb is
NULL, dequeuing as many packets as possible from ppp->file.xq.
When using seg6 in encap mode, we call ipv6_dev_get_saddr() to set the
source address of the outer IPv6 header, in case none was specified.
Using skb->dev can lead to BUG() when it is in an inconsistent state.
This patch uses the net_device attached to the skb's dst instead.
Fixes: 6c8702c60b886 ("ipv6: sr: add support for SRH encapsulation and injection with lwtunnels") Reported-by: Tom Herbert <[email protected]> Signed-off-by: David Lebrun <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Fixes: 6c8702c60b886 ("ipv6: sr: add support for SRH encapsulation and injection with lwtunnels") Signed-off-by: David Lebrun <[email protected]> Signed-off-by: David S. Miller <[email protected]>
David S. Miller [Thu, 22 Mar 2018 16:02:50 +0000 (12:02 -0400)]
Merge branch 'aquantia-fixes'
Igor Russkikh says:
====================
Aquantia atlantic hot fixes 03-2018
This is a set of atlantic driver hot fixes for various areas:
Some issues with hardware reset covered,
Fixed napi_poll flood happening on some traffic conditions,
Allow system to change MAC address on live device,
Add pci shutdown handler.
patch v2:
- reverse christmas tree
- remove driver private parameter, replacing it with define.
====================
Igor Russkikh [Tue, 20 Mar 2018 11:40:36 +0000 (14:40 +0300)]
net: aquantia: Implement pci shutdown callback
We should close link and all NIC operations during shutdown.
On some systems graceful reboot never closes NIC interface on its own,
but only indicates pci device shutdown. Without explicit handler, NIC
rx rings continued to transfer DMA data into prepared buffers while CPU
rebooted already. That caused memory corruptions on soft reboot.
We should report to napi full budget only when we have more job to do.
Before this fix, on any tx queue cleanup we forced napi to do poll again.
Thats a waste of cpu resources and caused storming with napi polls when
there was at least one tx on each interrupt.
With this fix we report full budget only when there is more job on TX
to do. Or, as before, when rx budget was fully consumed.
Igor Russkikh [Tue, 20 Mar 2018 11:40:33 +0000 (14:40 +0300)]
net: aquantia: Change inefficient wait loop on fw data reads
B1 hardware changes behavior of mailbox interface, it has busy bit
always raised. Data ready condition should be detected by increment
of address register.
Old code has empty `for` loop, and that caused cpu overloads on B1
hardware. aq_nic_service_timer_cb consumed ~100ms because of that.
Igor Russkikh [Tue, 20 Mar 2018 11:40:31 +0000 (14:40 +0300)]
net: aquantia: Fix hardware reset when SPI may rarely hangup
Under some circumstances (notably using thunderbolt interface) SPI
on chip reset may be in active transaction.
Here we forcibly cleanup SPI to prevent possible hangups.
David S. Miller [Thu, 22 Mar 2018 15:59:12 +0000 (11:59 -0400)]
Merge branch 'cxgb4-rdma'
Raju Rangoju says:
====================
Add support for RDMA enhancements in cxgb4
Allocates the HW-resources and provide the necessary routines for the
upper layer driver (rdma/iw_cxgb4) to enable the RDMA SRQ support for
Chelsio adapters.
Advertise support for write with immediate work request
Advertise support for write with completion
v3: modified memory allocation as per Stefano's suggestion
v2: fixed the patching issues and also
fixed the following based on review comments of Stefano Brivio
- using kvzalloc instead of vzalloc
- using #define instead of enum
====================
Raju Rangoju [Tue, 20 Mar 2018 10:11:42 +0000 (15:41 +0530)]
cxgb4: Support firmware rdma write completion work request.
If FW supports RDMA WRITE_COMPLETION functionality, then advertise that
to the ULDs. This will be used by iw_cxgb4 to allow WRITE_COMPLETION
work requests.
Raju Rangoju [Tue, 20 Mar 2018 10:11:41 +0000 (15:41 +0530)]
cxgb4: Support firmware rdma write with immediate work request.
If FW supports RDMA WRITE_WITH_IMMEDATE functionality, then advertise
that
to the ULDs. This will be used by iw_cxgb4 to allow WRITE_WITH_IMMEDIATE
work requests.
David S. Miller [Thu, 22 Mar 2018 15:52:31 +0000 (11:52 -0400)]
Merge branch 's390-qeth-fixes'
Julian Wiedmann says:
====================
s390/qeth: fixes 2018-03-20
Please apply one final set of qeth patches for 4.16.
All of these fix long-standing bugs, so please queue them up for -stable
as well.
====================
Julian Wiedmann [Tue, 20 Mar 2018 06:59:15 +0000 (07:59 +0100)]
s390/qeth: on channel error, reject further cmd requests
When the IRQ handler determines that one of the cmd IO channels has
failed and schedules recovery, block any further cmd requests from
being submitted. The request would inevitably stall, and prevent the
recovery from making progress until the request times out.
This sort of error was observed after Live Guest Relocation, where
the pending IO on the READ channel intentionally gets terminated to
kick-start recovery. Simultaneously the guest executed SIOCETHTOOL,
triggering qeth to issue a QUERY CARD INFO command. The command
then stalled in the inoperabel WRITE channel.
Julian Wiedmann [Tue, 20 Mar 2018 06:59:14 +0000 (07:59 +0100)]
s390/qeth: lock read device while queueing next buffer
For calling ccw_device_start(), issue_next_read() needs to hold the
device's ccwlock.
This is satisfied for the IRQ handler path (where qeth_irq() gets called
under the ccwlock), but we need explicit locking for the initial call by
the MPC initialization.
Julian Wiedmann [Tue, 20 Mar 2018 06:59:13 +0000 (07:59 +0100)]
s390/qeth: when thread completes, wake up all waiters
qeth_wait_for_threads() is potentially called by multiple users, make
sure to notify all of them after qeth_clear_thread_running_bit()
adjusted the thread_running_mask. With no timeout, callers would
otherwise stall.
Fix it by free'ing the netdev straight after unregistering. This also
fixes the sysfs-driven layer switch case (qeth_dev_layer2_store()),
where the need to free the current netdevice was not considered at all.
Note that free_netdev() takes care of the netif_napi_del() for us too.
Heiner Kallweit [Tue, 20 Mar 2018 06:45:35 +0000 (07:45 +0100)]
r8169: change type of first argument in rtl_tx_performance_tweak
Changing the type of the first argument to struct rtl8169_private * is more
in line with the other functions in the driver and it allows to reduce the
code size.
====================
net: phy: Add general dummy stubs for MMD register access
v2:
As suggested by Andrew:
- Add general dummy stubs
- Also use that for the micrel phy
This patch series fix the Ethernet broken on the mpc8315erdb board introduced
by commit b6b5e8a69118 ("gianfar: Disable EEE autoneg by default").
====================
Kevin Hao [Tue, 20 Mar 2018 01:44:53 +0000 (09:44 +0800)]
net: phy: realtek: Use the dummy stubs for MMD register access for rtl8211b
The Ethernet on mpc8315erdb is broken since commit b6b5e8a69118
("gianfar: Disable EEE autoneg by default"). The reason is that
even though the rtl8211b doesn't support the MMD extended registers
access, it does return some random values if we trying to access
the MMD register via indirect method. This makes it seem that the
EEE is supported by this phy device. And the subsequent writing to
the MMD registers does cause the phy malfunction. So use the dummy
stubs for the MMD register access to fix this issue.
Fixes: b6b5e8a69118 ("gianfar: Disable EEE autoneg by default") Signed-off-by: Kevin Hao <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Kevin Hao [Tue, 20 Mar 2018 01:44:52 +0000 (09:44 +0800)]
net: phy: Add general dummy stubs for MMD register access
For some phy devices, even though they don't support the MMD extended
register access, it does have some side effect if we are trying to
read/write the MMD registers via indirect method. So introduce general
dummy stubs for MMD register access which these devices can use to avoid
such side effect.
Fixes: b6b5e8a69118 ("gianfar: Disable EEE autoneg by default") Signed-off-by: Kevin Hao <[email protected]> Signed-off-by: David S. Miller <[email protected]>
The netns deletion path does not need to wait for all net_devices
to be unregistered before dismantling rds_tcp state for the netns
(we are able to dismantle this state on module unload even when
all net_devices are active so there is no dependency here).
This patch removes code related to netdevice notifiers and
refactors all the code needed to dismantle rds_tcp state
into a ->exit callback for the pernet_operations used with
register_pernet_device().
This patch adds a receive method to NETLINK_KOBJECT_UEVENT netlink sockets
to allow sending uevent messages into the network namespace the socket
belongs to.
Currently non-initial network namespaces are already isolated and don't
receive uevents. There are a number of cases where it is beneficial for a
sufficiently privileged userspace process to send a uevent into a network
namespace.
One such use case would be debugging and fuzzing of a piece of software
which listens and reacts to uevents. By running a copy of that software
inside a network namespace, specific uevents could then be presented to it.
More concretely, this would allow for easy testing of udevd/ueventd.
This will also allow some piece of software to run components inside a
separate network namespace and then effectively filter what that software
can receive. Some examples of software that do directly listen to uevents
and that we have in the past attempted to run inside a network namespace
are rbd (CEPH client) or the X server.
Implementation:
The implementation has been kept as simple as possible from the kernel's
perspective. Specifically, a simple input method uevent_net_rcv() is added
to NETLINK_KOBJECT_UEVENT sockets which completely reuses existing
af_netlink infrastructure and does neither add an additional netlink family
nor requires any user-visible changes.
For example, by using netlink_rcv_skb() we can make use of existing netlink
infrastructure to report back informative error messages to userspace.
Furthermore, this implementation does not introduce any overhead for
existing uevent generating codepaths. The struct netns got a new uevent
socket member that records the uevent socket associated with that network
namespace including its position in the uevent socket list. Since we record
the uevent socket for each network namespace in struct net we don't have to
walk the whole uevent socket list. Instead we can directly retrieve the
relevant uevent socket and send the message. At exit time we can now also
trivially remove the uevent socket from the uevent socket list. This keeps
the codepath very performant without introducing needless overhead and even
makes older codepaths faster.
Uevent sequence numbers are kept global. When a uevent message is sent to
another network namespace the implementation will simply increment the
global uevent sequence number and append it to the received uevent. This
has the advantage that the kernel will never need to parse the received
uevent message to replace any existing uevent sequence numbers. Instead it
is up to the userspace process to remove any existing uevent sequence
numbers in case the uevent message to be sent contains any.
Security:
In order for a caller to send uevent messages to a target network namespace
the caller must have CAP_SYS_ADMIN in the owning user namespace of the
target network namespace. Additionally, any received uevent message is
verified to not exceed size UEVENT_BUFFER_SIZE. This includes the space
needed to append the uevent sequence number.
Testing:
This patch has been tested and verified to work with the following udev
implementations:
1. CentOS 6 with udevd version 147
2. Debian Sid with systemd-udevd version 237
3. Android 7.1.1 with ueventd
This commit adds struct uevent_sock to struct net. Since struct uevent_sock
records the position of the uevent socket in the uevent socket list we can
trivially remove it from the uevent socket list during cleanup. This speeds
up the old removal codepath.
Note, list_del() will hit __list_del_entry_valid() in its call chain which
will validate that the element is a member of the list. If it isn't it will
take care that the list is not modified.
Kirill Tkhai [Mon, 19 Mar 2018 11:45:46 +0000 (14:45 +0300)]
net: Convert nf_ct_net_ops
These pernet_operations register and unregister sysctl.
Also, there is inet_frags_exit_net() called in exit method,
which has to be safe after a560002437d3 "net: Fix hlist
corruptions in inet_evict_bucket()".
Kirill Tkhai [Mon, 19 Mar 2018 11:45:37 +0000 (14:45 +0300)]
net: Convert lowpan_frags_ops
These pernet_operations register and unregister sysctl.
Also, there is inet_frags_exit_net() called in exit method,
which has to be safe after a560002437d3 "net: Fix hlist
corruptions in inet_evict_bucket()".
Kirill Tkhai [Mon, 19 Mar 2018 11:39:05 +0000 (14:39 +0300)]
net: Convert can_pernet_ops
These pernet_operations create and destroy /proc entries
and cancel per-net timer.
Also, there are unneed iterations over empty list of net
devices, since all net devices must be already moved
to init_net or unregistered by default_device_ops. This
already was mentioned here:
The memmap options sent to the udl framebuffer driver were not being
checked for all sets of possible crazy values. Fix this up by properly
bounding the allowed values.
Dave Airlie [Wed, 21 Mar 2018 22:52:21 +0000 (08:52 +1000)]
Merge branch 'drm-fixes-4.16' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
A few more fixes for 4.16. Mostly for displays:
- A fix for DP handling on radeon
- Fix banding on eDP panels
- Fix HBR audio
- Fix for disabling VGA mode on Raven that leads to a corrupt or
blank display on some platforms
* 'drm-fixes-4.16' of git://people.freedesktop.org/~agd5f/linux:
drm/amd/display: Add one to EDID's audio channel count when passing to DC
drm/amd/display: We shouldn't set format_default on plane as atomic driver
drm/amd/display: Fix FMT truncation programming
drm/amd/display: Allow truncation to 10 bits
drm/amd/display: fix dereferencing possible ERR_PTR()
drm/amd/display: Refine disable VGA
drm/amdgpu: Use atomic function to disable crtcs with dc enabled
drm/radeon: Don't turn off DP sink when disconnected
David S. Miller [Wed, 21 Mar 2018 22:12:46 +0000 (18:12 -0400)]
Merge branch 'net-sched-action-idr-leak'
Davide Caratti says:
====================
fix idr leak in actions
This series fixes situations where a temporary failure to install a TC
action results in the permanent impossibility to reuse the configured
value of 'index'.
Thanks to Cong Wang for the initial review.
v2: fix build error in act_ipt.c, reported by kbuild test robot
====================
Davide Caratti [Mon, 19 Mar 2018 14:31:28 +0000 (15:31 +0100)]
net/sched: fix idr leak in the error path of tcf_skbmod_init()
tcf_skbmod_init() can fail after the idr has been successfully reserved.
When this happens, every subsequent attempt to configure skbmod rules
using the same idr value will systematically fail with -ENOSPC, unless
the first attempt was done using the 'replace' keyword:
# tc action add action skbmod swap mac index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc action add action skbmod swap mac index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
# tc action add action skbmod swap mac index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
...
Fix this in tcf_skbmod_init(), ensuring that tcf_idr_release() is called
on the error path when the idr has been reserved, but not yet inserted.
Also, don't test 'ovr' in the error path, to avoid a 'replace' failure
implicitly become a 'delete' that leaks refcount in act_skbmod module:
# rmmod act_skbmod; modprobe act_skbmod
# tc action add action skbmod swap mac index 100
# tc action add action skbmod swap mac continue index 100
RTNETLINK answers: File exists
We have an error talking to the kernel
# tc action replace action skbmod swap mac continue index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc action list action skbmod
#
# rmmod act_skbmod
rmmod: ERROR: Module act_skbmod is in use
Fixes: 65a206c01e8e ("net/sched: Change act_api and act_xxx modules to use IDR") Acked-by: Jamal Hadi Salim <[email protected]> Signed-off-by: Davide Caratti <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Davide Caratti [Mon, 19 Mar 2018 14:31:27 +0000 (15:31 +0100)]
net/sched: fix idr leak in the error path of tcf_vlan_init()
tcf_vlan_init() can fail after the idr has been successfully reserved.
When this happens, every subsequent attempt to configure vlan rules using
the same idr value will systematically fail with -ENOSPC, unless the first
attempt was done using the 'replace' keyword.
# tc action add action vlan pop index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc action add action vlan pop index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
# tc action add action vlan pop index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
...
Fix this in tcf_vlan_init(), ensuring that tcf_idr_release() is called on
the error path when the idr has been reserved, but not yet inserted. Also,
don't test 'ovr' in the error path, to avoid a 'replace' failure implicitly
become a 'delete' that leaks refcount in act_vlan module:
# rmmod act_vlan; modprobe act_vlan
# tc action add action vlan push id 5 index 100
# tc action replace action vlan push id 7 index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc action list action vlan
#
# rmmod act_vlan
rmmod: ERROR: Module act_vlan is in use
Fixes: 4c5b9d9642c8 ("act_vlan: VLAN action rewrite to use RCU lock/unlock and update") Fixes: 65a206c01e8e ("net/sched: Change act_api and act_xxx modules to use IDR") Acked-by: Jamal Hadi Salim <[email protected]> Signed-off-by: Davide Caratti <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Davide Caratti [Mon, 19 Mar 2018 14:31:26 +0000 (15:31 +0100)]
net/sched: fix idr leak in the error path of __tcf_ipt_init()
__tcf_ipt_init() can fail after the idr has been successfully reserved.
When this happens, subsequent attempts to configure xt/ipt rules using
the same idr value systematically fail with -ENOSPC:
# tc action add action xt -j LOG --log-prefix test1 index 100
tablename: mangle hook: NF_IP_POST_ROUTING
target: LOG level warning prefix "test1" index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
Command "(null)" is unknown, try "tc actions help".
# tc action add action xt -j LOG --log-prefix test1 index 100
tablename: mangle hook: NF_IP_POST_ROUTING
target: LOG level warning prefix "test1" index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
Command "(null)" is unknown, try "tc actions help".
# tc action add action xt -j LOG --log-prefix test1 index 100
tablename: mangle hook: NF_IP_POST_ROUTING
target: LOG level warning prefix "test1" index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
...
Fix this in the error path of __tcf_ipt_init(), calling tcf_idr_release()
in place of tcf_idr_cleanup(). Since tcf_ipt_release() can now be called
when tcfi_t is NULL, we also need to protect calls to ipt_destroy_target()
to avoid NULL pointer dereference.
Fixes: 65a206c01e8e ("net/sched: Change act_api and act_xxx modules to use IDR") Acked-by: Jamal Hadi Salim <[email protected]> Signed-off-by: Davide Caratti <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Davide Caratti [Mon, 19 Mar 2018 14:31:25 +0000 (15:31 +0100)]
net/sched: fix idr leak in the error path of tcp_pedit_init()
tcf_pedit_init() can fail to allocate 'keys' after the idr has been
successfully reserved. When this happens, subsequent attempts to configure
a pedit rule using the same idr value systematically fail with -ENOSPC:
# tc action add action pedit munge ip ttl set 63 index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc action add action pedit munge ip ttl set 63 index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
# tc action add action pedit munge ip ttl set 63 index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
...
Fix this in the error path of tcf_act_pedit_init(), calling
tcf_idr_release() in place of tcf_idr_cleanup().
Fixes: 65a206c01e8e ("net/sched: Change act_api and act_xxx modules to use IDR") Acked-by: Jamal Hadi Salim <[email protected]> Signed-off-by: Davide Caratti <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Dan Williams [Wed, 21 Mar 2018 22:12:07 +0000 (15:12 -0700)]
libnvdimm, nfit: fix persistence domain reporting
The persistence domain is a point in the platform where once writes
reach that destination the platform claims it will make them persistent
relative to power loss. In the ACPI NFIT this is currently communicated
as 2 bits in the "NFIT - Platform Capabilities Structure". The bits
comprise a hierarchy, i.e. bit0 "CPU Cache Flush to NVDIMM Durability on
Power Loss Capable" implies bit1 "Memory Controller Flush to NVDIMM
Durability on Power Loss Capable".
Commit 96c3a239054a "libnvdimm: expose platform persistence attr..."
shows the persistence domain as flags, but it's really an enumerated
hierarchy.
Fix this newly introduced user ABI to show the closest available
persistence domain before userspace develops dependencies on seeing, or
needing to develop code to tolerate, the raw NFIT flags communicated
through the libnvdimm-generic region attribute.
Davide Caratti [Mon, 19 Mar 2018 14:31:24 +0000 (15:31 +0100)]
net/sched: fix idr leak in the error path of tcf_act_police_init()
tcf_act_police_init() can fail after the idr has been successfully
reserved (e.g., qdisc_get_rtab() may return NULL). When this happens,
subsequent attempts to configure a police rule using the same idr value
systematiclly fail with -ENOSPC:
# tc action add action police rate 1000 burst 1000 drop index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc action add action police rate 1000 burst 1000 drop index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
# tc action add action police rate 1000 burst 1000 drop index 100
RTNETLINK answers: No space left on device
...
Fix this in the error path of tcf_act_police_init(), calling
tcf_idr_release() in place of tcf_idr_cleanup().
Fixes: 65a206c01e8e ("net/sched: Change act_api and act_xxx modules to use IDR") Acked-by: Jamal Hadi Salim <[email protected]> Signed-off-by: Davide Caratti <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Davide Caratti [Mon, 19 Mar 2018 14:31:23 +0000 (15:31 +0100)]
net/sched: fix idr leak in the error path of tcf_simp_init()
if the kernel fails to duplicate 'sdata', creation of a new action fails
with -ENOMEM. However, subsequent attempts to install the same action
using the same value of 'index' systematically fail with -ENOSPC, and
that value of 'index' will no more be usable by act_simple, until rmmod /
insmod of act_simple.ko is done:
# tc actions add action simple sdata hello index 100
# tc actions list action simple
action order 0: Simple <hello>
index 100 ref 1 bind 0
# tc actions flush action simple
# tc actions add action simple sdata hello index 100
RTNETLINK answers: Cannot allocate memory
We have an error talking to the kernel
# tc actions flush action simple
# tc actions add action simple sdata hello index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
# tc actions add action simple sdata hello index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
...
Fix this in the error path of tcf_simp_init(), calling tcf_idr_release()
in place of tcf_idr_cleanup().
Fixes: 65a206c01e8e ("net/sched: Change act_api and act_xxx modules to use IDR") Suggested-by: Cong Wang <[email protected]> Acked-by: Jamal Hadi Salim <[email protected]> Signed-off-by: Davide Caratti <[email protected]> Signed-off-by: David S. Miller <[email protected]>
Davide Caratti [Mon, 19 Mar 2018 14:31:22 +0000 (15:31 +0100)]
net/sched: fix idr leak on the error path of tcf_bpf_init()
when the following command sequence is entered
# tc action add action bpf bytecode '4,40 0 0 12,31 0 1 2048,6 0 0 262144,6 0 0 0' index 100
RTNETLINK answers: Invalid argument
We have an error talking to the kernel
# tc action add action bpf bytecode '4,40 0 0 12,21 0 1 2048,6 0 0 262144,6 0 0 0' index 100
RTNETLINK answers: No space left on device
We have an error talking to the kernel
act_bpf correctly refuses to install the first TC rule, because 31 is not
a valid instruction. However, it refuses to install the second TC rule,
even if the BPF code is correct. Furthermore, it's no more possible to
install any other rule having the same value of 'index' until act_bpf
module is unloaded/inserted again. After the idr has been reserved, call
tcf_idr_release() instead of tcf_idr_cleanup(), to fix this issue.
Fixes: 65a206c01e8e ("net/sched: Change act_api and act_xxx modules to use IDR") Acked-by: Jamal Hadi Salim <[email protected]> Signed-off-by: Davide Caratti <[email protected]> Signed-off-by: David S. Miller <[email protected]>
The following pull-request contains BPF updates for your *net* tree.
The main changes are:
1) Follow-up fix to the fault injection framework to prevent jump
optimization on the kprobe by installing a dummy post-handler,
from Masami.
2) Drop bpf_perf_prog_read_value helper from tracepoint type programs
which was mistakenly added there and would otherwise crash due to
wrong input context, from Yonghong.
3) Fix a crash in BPF fs when compiled with clang. Code appears to
be fine just that clang tries to overly aggressive optimize in
non C conform ways, therefore fix the kernel's Makefile to
generally prevent such issues, from Daniel.
4) Skip unnecessary capability checks in bpf syscall, which is otherwise
triggering unnecessary security hooks on capability checking and
causing false alarms on unprivileged processes trying to access
CAP_SYS_ADMIN restricted infra, from Chenbo.
5) Fix the test_bpf.ko module when CONFIG_BPF_JIT_ALWAYS_ON is set
with regards to a test case that is really just supposed to fail
on x8_64 JIT but not others, from Thadeu.
====================
The following pull-request contains BPF updates for your *net-next* tree.
The main changes are:
1) Add a BPF hook for sendmsg and sendfile by reusing the ULP infrastructure
and sockmap. Three helpers are added along with this, bpf_msg_apply_bytes(),
bpf_msg_cork_bytes(), and bpf_msg_pull_data(). The first is used to tell
for how many bytes the verdict should be applied to, the second to tell
that x bytes need to be queued first to retrigger the BPF program for a
verdict, and the third helper is mainly for the sendfile case to pull in
data for making it private for reading and/or writing, from John.
2) Improve address to symbol resolution of user stack traces in BPF stackmap.
Currently, the latter stores the address for each entry in the call trace,
however to map these addresses to user space files, it is necessary to
maintain the mapping from these virtual addresses to symbols in the binary
which is not practical for system-wide profiling. Instead, this option for
the stackmap rather stores the ELF build id and offset for the call trace
entries, from Song.
3) Add support that allows BPF programs attached to perf events to read the
address values recorded with the perf events. They are requested through
PERF_SAMPLE_ADDR via perf_event_open(). Main motivation behind it is to
support building memory or lock access profiling and tracing tools with
the help of BPF, from Teng.
4) Several improvements to the tools/bpf/ Makefiles. The 'make bpf' in the
tools directory does not provide the standard quiet output except for
bpftool and it also does not respect specifying a build output directory.
'make bpf_install' command neither respects specified destination nor
prefix, all from Jiri. In addition, Jakub fixes several other minor issues
in the Makefiles on top of that, e.g. fixing dependency paths, phony
targets and more.
5) Various doc updates e.g. add a comment for BPF fs about reserved names
to make the dentry lookup from there a bit more obvious, and a comment
to the bpf_devel_QA file in order to explain the diff between native
and bpf target clang usage with regards to pointer size, from Quentin
and Daniel.
====================
Chris Wilson [Tue, 20 Mar 2018 10:04:48 +0000 (10:04 +0000)]
drm/i915: Specify which engines to reset following semaphore/event lockups
If the GPU is stuck waiting for an event or for a semaphore, we need to
reset the GPU in order to recover. We have to tell the reset routine
which engines we want reset, but we were still using the old interface
and declaring it as "not-fatal".
Johannes Berg [Wed, 21 Mar 2018 10:00:14 +0000 (11:00 +0100)]
ath9k_htc: use non-QoS NDP for AP probing
When switching mac80211 to use QoS NDP, it turned out that
ath9k_htc is somehow broken by this, e.g. see
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=891060.
Fix this by using the new mac80211 flag to go back to the
old, incorrect, behaviour for this driver.
Set the wmediumd to the net's wmediumd when the radio gets created.
Radios created after HWSIM_CMD_REGISTER don't currently get their
data->wmediumd set and the userspace would need to reconnect to
netlink to be able to call HWSIM_CMD_REGISTER again.
Alternatively I think data->netgroup and data->wmedium could be
replaced with a pointer to hwsim_net.
mac80211: add ieee80211_hw flag for QoS NDP support
Commit 7b6ddeaf27ec ("mac80211: use QoS NDP for AP probing") added an
argument qos_ok to ieee80211_nullfunc_get to support QoS NDP. Despite
the claim in the commit log "Change all the drivers to *not* allow
QoS NDP for now, even though it looks like most of them should be OK
with that", this commit enables QoS NDP in response to beacons (see
change to mlme.c:ieee80211_send_nullfunc), causing ath9k_htc to lose
IP connectivity. See:
https://patchwork.kernel.org/patch/10241109/
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=891060
Introduce a hardware flag to allow such buggy drivers to override the
correct default behaviour of mac80211 of sending QoS NDP packets.
Thomas Hellstrom [Wed, 21 Mar 2018 09:18:38 +0000 (10:18 +0100)]
drm/vmwgfx: Fix a destoy-while-held mutex problem.
When validating legacy surfaces, the backup bo might be destroyed at
surface validate time. However, the kms resource validation code may have
the bo reserved, so we will destroy a locked mutex. While there shouldn't
be any other users of that mutex when it is destroyed, it causes a lock
leak and thus throws a lockdep error.
Fix this by having the kms resource validation code hold a reference to
the bo while we have it reserved. We do this by introducing a validation
context which might come in handy when the kms code is extended to validate
multiple resources or buffers.
drm/vmwgfx: Fix black screen and device errors when running without fbdev
When we are running without fbdev, transitioning from the login screen to
X or gnome-shell/wayland will cause a vt switch and the driver will disable
svga mode, losing all modesetting resources. However, the kms atomic state
does not reflect that and may think that a crtc is still turned on, which
will cause device errors when we try to bind an fb to the crtc, and the
screen will remain black.
Fix this by turning off all kms resources before disabling svga mode.
Mikita Lipski [Wed, 7 Mar 2018 15:49:23 +0000 (10:49 -0500)]
drm/amd/display: Allow truncation to 10 bits
The truncation isn't being programmed if the truncation
depth is set to 2, it causes an issue with dce11.2 asic
using 6bit eDP panel. It required to truncate 12:10 in order to
perform spatial dither 10:6.
This change will allow 12:10 truncation to be enabled.
Dave Airlie [Wed, 21 Mar 2018 03:56:07 +0000 (13:56 +1000)]
Merge tag 'exynos-drm-fixes-for-v4.16-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-fixes
Add a device tree property description for hdmi device node
. '#sound-dai-cells' property is required to describe link between
the HDMI IP block and the SoC's audio subsystem and Exynos SoC device
tree files already have this property but we missed its description.
* tag 'exynos-drm-fixes-for-v4.16-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
dt-bindings: exynos: Document #sound-dai-cells property of the HDMI node
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