- 29 Apr, 2024 5 commits
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Amit Cohen authored
We can get many completions in one interrupt. Currently, the CQ tasklet handles up to half queue size completions, and then arms the hardware to generate additional events, which means that in case that there were additional completions that we did not handle, we will get immediately an additional interrupt to handle the rest. The decision to handle up to half of the queue size is arbitrary and was determined in 2015, when mlxsw driver was added to the kernel. One additional fact that should be taken into account is that while WQEs from RDQ are handled, the CPU that handles the tasklet is dedicated for this task, which means that we might hold the CPU for a long time. Handle WQEs in smaller chucks, then arm CQ doorbell to notify the hardware to send additional notifications. Set the chunk size to 64 as this number is recommended using NAPI and the driver will use NAPI in a next patch. Note that for now we use ARM doorbell to retrigger CQ tasklet, but with NAPI it will be more efficient as software will reschedule the poll method and we will not involve hardware for that. Signed-off-by:
Amit Cohen <amcohen@nvidia.com> Reviewed-by:
Ido Schimmel <idosch@nvidia.com> Signed-off-by:
Petr Machata <petrm@nvidia.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
This is a followup of commit c4e86b43 ("net: add two more call_rcu_hurry()") fib6_info_destroy_rcu() is calling nexthop_put() or fib6_nh_release() We must not delay it too much or risk unregister_netdevice/ref_tracker traces because references to netdev are not released in time. This should speedup device/netns dismantles when CONFIG_RCU_LAZY=y Signed-off-by:
Eric Dumazet <edumazet@google.com> Reviewed-by:
Jiri Pirko <jiri@nvidia.com> Reviewed-by:
David Ahern <dsahern@kernel.org> Signed-off-by:
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Eric Dumazet authored
This is a followup of commit c4e86b43 ("net: add two more call_rcu_hurry()") Our reference to ifa->ifa_dev must be freed ASAP to release the reference to the netdev the same way. inet_rcu_free_ifa() in_dev_put() -> in_dev_finish_destroy() -> netdev_put() This should speedup device/netns dismantles when CONFIG_RCU_LAZY=y Signed-off-by:
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Eric Dumazet authored
This came while reviewing commit c4e86b43 ("net: add two more call_rcu_hurry()"). Paolo asked if adding one synchronize_rcu() would help. While synchronize_rcu() does not help, making sure to call rcu_barrier() before msleep(wait) is definitely helping to make sure lazy call_rcu() are completed. Instead of waiting ~100 seconds in my tests, the ref_tracker splats occurs one time only, and netdev_wait_allrefs_any() latency is reduced to the strict minimum. Ideally we should audit our call_rcu() users to make sure no refcount (or cascading call_rcu()) is held too long, because rcu_barrier() is quite expensive. Fixes: 0e4be9e5 ("net: use exponential backoff in netdev_wait_allrefs") Signed-off-by:
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Tanmay Patil authored
If the base-time for taprio is in the past, start the schedule at the time of the form "base_time + N*cycle_time" where N is the smallest possible integer such that the above time is in the future. Signed-off-by:
Tanmay Patil <t-patil@ti.com> Signed-off-by:
Chintan Vankar <c-vankar@ti.com> Reviewed-by:
Simon Horman <horms@kernel.org> Signed-off-by:
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- 27 Apr, 2024 1 commit
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Jakub Kicinski authored
When using YNL in tests appending the doc string to the type name makes it harder to check that we got the correct error. Put the doc under a separate key. Reviewed-by:
Donald Hunter <donald.hunter@gmail.com> Link: https://lore.kernel.org/r/20240426003111.359285-1-kuba@kernel.orgSigned-off-by:
Jakub Kicinski <kuba@kernel.org>
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- 26 Apr, 2024 34 commits
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Jakub Kicinski authored
Jakub Kicinski says: ==================== selftests: drv-net: round some sharp edges I had to explain how to run the driver tests twice already. Improve the README so we can just point to it. Improve the config validation. v1: https://lore.kernel.org/r/20240424221444.4194069-1-kuba@kernel.org/ ==================== Link: https://lore.kernel.org/r/20240425222341.309778-1-kuba@kernel.orgSigned-off-by:
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Jakub Kicinski authored
Throw a slightly more helpful exception when env variables are partially populated. Prior to this change we'd get a dictionary key exception somewhere later on. Reviewed-by:
Willem de Bruijn <willemb@google.com> Link: https://lore.kernel.org/r/20240425222341.309778-4-kuba@kernel.orgSigned-off-by:
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Jakub Kicinski authored
The shell lexer is not helping much, do very basic parsing manually. Reviewed-by:
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Jakub Kicinski authored
Add more info to the README. It's also now copied to GitHub for increased visibility: https://github.com/linux-netdev/nipa/wiki/Running-driver-testsReviewed-by:
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Eric Dumazet authored
I forgot to call tcp_skb_collapse_tstamp() in the case we consume the second skb in write queue. Neal suggested to create a common helper used by tcp_mtu_probe() and tcp_grow_skb(). Fixes: 8ee602c6 ("tcp: try to send bigger TSO packets") Signed-off-by:
Neal Cardwell <ncardwell@google.com> Link: https://lore.kernel.org/r/20240425193450.411640-1-edumazet@google.comSigned-off-by:
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Justin Stitt authored
This pattern of strncpy with some pointer arithmetic setting fixed-sized intervals with string literal data is a bit weird so let's use ethtool_puts() as this has more obvious behavior and is less-error prone. Nicely, we also get to drop a usage of the now deprecated strncpy() [1]. Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1] Link: https://github.com/KSPP/linux/issues/90Suggested-by:
Alexander Lobakin <aleksander.lobakin@intel.com> Reviewed-by:
Kees Cook <keescook@chromium.org> Signed-off-by:
Justin Stitt <justinstitt@google.com> Link: https://lore.kernel.org/r/20240425-strncpy-drivers-net-dsa-lan9303-core-c-v4-1-9fafd419d7bb@google.comSigned-off-by:
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Paolo Abeni authored
Jason Xing says: ==================== Implement reset reason mechanism to detect From: Jason Xing <kernelxing@tencent.com> In production, there are so many cases about why the RST skb is sent but we don't have a very convenient/fast method to detect the exact underlying reasons. RST is implemented in two kinds: passive kind (like tcp_v4_send_reset()) and active kind (like tcp_send_active_reset()). The former can be traced carefully 1) in TCP, with the help of drop reasons, which is based on Eric's idea[1], 2) in MPTCP, with the help of reset options defined in RFC 8684. The latter is relatively independent, which should be implemented on our own, such as active reset reasons which can not be replace by skb drop reason or something like this. In this series, I focus on the fundamental implement mostly about how the rstreason mechanism works and give the detailed passive part as an example, not including the active reset part. In future, we can go further and refine those NOT_SPECIFIED reasons. Here are some examples when tracing: <idle>-0 [002] ..s1. 1830.262425: tcp_send_reset: skbaddr=x skaddr=x src=x dest=x state=x reason=NOT_SPECIFIED <idle>-0 [002] ..s1. 1830.262425: tcp_send_reset: skbaddr=x skaddr=x src=x dest=x state=x reason=NO_SOCKET [1] Link: https://lore.kernel.org/all/CANn89iJw8x-LqgsWOeJQQvgVg6DnL5aBRLi10QN2WBdr+X4k=w@mail.gmail.com/ ==================== Link: https://lore.kernel.org/r/20240425031340.46946-1-kerneljasonxing@gmail.comSigned-off-by:Paolo Abeni <pabeni@redhat.com>
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Jason Xing authored
At last, we should let it work by introducing this reset reason in trace world. One of the possible expected outputs is: ... tcp_send_reset: skbaddr=xxx skaddr=xxx src=xxx dest=xxx state=TCP_ESTABLISHED reason=NOT_SPECIFIED Signed-off-by:
Jason Xing <kernelxing@tencent.com> Reviewed-by:
Steven Rostedt (Google) <rostedt@goodmis.org> Reviewed-by:
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Jason Xing authored
Since we have mapped every mptcp reset reason definition in enum sk_rst_reason, introducing a new helper can cover some missing places where we have already set the subflow->reset_reason. Note: using SK_RST_REASON_NOT_SPECIFIED is the same as SK_RST_REASON_MPTCP_RST_EUNSPEC. They are both unknown. So we can convert it directly. Suggested-by:
Matthieu Baerts (NGI0) <matttbe@kernel.org> Reviewed-by:
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Jason Xing authored
It relies on what reset options in the skb are as rfc8684 says. Reusing this logic can save us much energy. This patch replaces most of the prior NOT_SPECIFIED reasons. Signed-off-by:
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Jason Xing authored
Reuse the dropreason logic to show the exact reason of tcp reset, so we can finally display the corresponding item in enum sk_reset_reason instead of reinventing new reset reasons. This patch replaces all the prior NOT_SPECIFIED reasons. Signed-off-by:
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Jason Xing authored
Like what we did to passive reset: only passing possible reset reason in each active reset path. No functional changes. Signed-off-by:
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Jason Xing authored
Adjust the parameter and support passing reason of reset which is for now NOT_SPECIFIED. No functional changes. Signed-off-by:
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Jason Xing authored
Add a new standalone file for the easy future extension to support both active reset and passive reset in the TCP/DCCP/MPTCP protocols. This patch only does the preparations for reset reason mechanism, nothing else changes. The reset reasons are divided into three parts: 1) reuse drop reasons for passive reset in TCP 2) our own independent reasons which aren't relying on other reasons at all 3) reuse MP_TCPRST option for MPTCP The benefits of a standalone reset reason are listed here: 1) it can cover more than one case, such as reset reasons in MPTCP, active reset reasons. 2) people can easily/fastly understand and maintain this mechanism. 3) we get unified format of output with prefix stripped. 4) more new reset reasons are on the way ... I will implement the basic codes of active/passive reset reason in those three protocols, which are not complete for this moment. For passive reset part in TCP, I only introduce the NO_SOCKET common case which could be set as an example. After this series applied, it will have the ability to open a new gate to let other people contribute more reasons into it :) Signed-off-by:
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Song Yoong Siang authored
This patch adds support to per-packet Tx hardware timestamp request to AF_XDP zero-copy packet via XDP Tx metadata framework. Please note that user needs to enable Tx HW timestamp capability via igc_ioctl() with SIOCSHWTSTAMP cmd before sending xsk Tx hardware timestamp request. Same as implementation in RX timestamp XDP hints kfunc metadata, Timer 0 (adjustable clock) is used in xsk Tx hardware timestamp. i225/i226 have four sets of timestamping registers. *skb and *xsk_tx_buffer pointers are used to indicate whether the timestamping register is already occupied. Furthermore, a boolean variable named xsk_pending_ts is used to hold the transmit completion until the tx hardware timestamp is ready. This is because, for i225/i226, the timestamp notification event comes some time after the transmit completion event. The driver will retrigger hardware irq to clean the packet after retrieve the tx hardware timestamp. Besides, xsk_meta is added into struct igc_tx_timestamp_request as a hook to the metadata location of the transmit packet. When the Tx timestamp interrupt is fired, the interrupt handler will copy the value of Tx hwts into metadata location via xsk_tx_metadata_complete(). This patch is tested with tools/testing/selftests/bpf/xdp_hw_metadata on Intel ADL-S platform. Below are the test steps and results. Test Step 1: Run xdp_hw_metadata app ./xdp_hw_metadata <iface> > /dev/shm/result.log Test Step 2: Enable Tx hardware timestamp hwstamp_ctl -i <iface> -t 1 -r 1 Test Step 3: Run ptp4l and phc2sys for time synchronization Test Step 4: Generate UDP packets with 1ms interval for 10s trafgen --dev <iface> '{eth(da=<addr>), udp(dp=9091)}' -t 1ms -n 10000 Test Step 5: Rerun Step 1-3 with 10s iperf3 as background traffic Test Step 6: Rerun Step 1-4 with 10s iperf3 as background traffic Based on iperf3 results below, the impact of holding tx completion to throughput is not observable. Result of last UDP packet (no. 10000) in Step 4: poll: 1 (0) skip=99 fail=0 redir=10000 xsk_ring_cons__peek: 1 0x5640a37972d0: rx_desc[9999]->addr=f2110 addr=f2110 comp_addr=f2110 EoP rx_hash: 0x2049BE1D with RSS type:0x1 HW RX-time: 1679819246792971268 (sec:1679819246.7930) delta to User RX-time sec:0.0000 (14.990 usec) XDP RX-time: 1679819246792981987 (sec:1679819246.7930) delta to User RX-time sec:0.0000 (4.271 usec) No rx_vlan_tci or rx_vlan_proto, err=-95 0x5640a37972d0: ping-pong with csum=ab19 (want 315b) csum_start=34 csum_offset=6 0x5640a37972d0: complete tx idx=9999 addr=f010 HW TX-complete-time: 1679819246793036971 (sec:1679819246.7930) delta to User TX-complete-time sec:0.0001 (77.656 usec) XDP RX-time: 1679819246792981987 (sec:1679819246.7930) delta to User TX-complete-time sec:0.0001 (132.640 usec) HW RX-time: 1679819246792971268 (sec:1679819246.7930) delta to HW TX-complete-time sec:0.0001 (65.703 usec) 0x5640a37972d0: complete rx idx=10127 addr=f2110 Result of iperf3 without tx hwts request in step 5: [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 2.74 GBytes 2.36 Gbits/sec 0 sender [ 5] 0.00-10.05 sec 2.74 GBytes 2.34 Gbits/sec receiver Result of iperf3 running parallel with trafgen command in step 6: [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 2.74 GBytes 2.36 Gbits/sec 0 sender [ 5] 0.00-10.04 sec 2.74 GBytes 2.34 Gbits/sec receiver Co-developed-by:Lai Peter Jun Ann <jun.ann.lai@intel.com> Signed-off-by:
Song Yoong Siang <yoong.siang.song@intel.com> Acked-by:
John Fastabend <john.fastabend@gmail.com> Acked-by:
Vinicius Costa Gomes <vinicius.gomes@intel.com> Tested-by:
Naama Meir <naamax.meir@linux.intel.com> Signed-off-by:
Tony Nguyen <anthony.l.nguyen@intel.com> Link: https://lore.kernel.org/r/20240424210256.3440903-1-anthony.l.nguyen@intel.comSigned-off-by:
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Paolo Abeni authored
Jiri Pirko says: ==================== selftests: virtio_net: introduce initial testing infrastructure This patchset aims at introducing very basic initial infrastructure for virtio_net testing, namely it focuses on virtio feature testing. The first patch adds support for debugfs for virtio devices, allowing user to filter features to pretend to be driver that is not capable of the filtered feature. Example: $ cat /sys/bus/virtio/devices/virtio0/features 1110010111111111111101010000110010000000100000000000000000000000 $ echo "5" >/sys/kernel/debug/virtio/virtio0/filter_feature_add $ cat /sys/kernel/debug/virtio/virtio0/filter_features 5 $ echo "virtio0" > /sys/bus/virtio/drivers/virtio_net/unbind $ echo "virtio0" > /sys/bus/virtio/drivers/virtio_net/bind $ cat /sys/bus/virtio/devices/virtio0/features 1110000111111111111101010000110010000000100000000000000000000000 Leverage that in the last patch that lays ground for virtio_net selftests testing, including very basic F_MAC feature test. To run this, do: $ make -C tools/testing/selftests/ TARGETS=drivers/net/virtio_net/ run_tests It is assumed, as with lot of other selftests in the net group, that there are netdevices connected back-to-back. In this case, two virtio_net devices connected back to back. If you use "tap" qemu netdevice type, to configure this loop on a hypervisor, one may use this script: DEV1="$1" DEV2="$2" sudo tc qdisc add dev $DEV1 clsact sudo tc qdisc add dev $DEV2 clsact sudo tc filter add dev $DEV1 ingress protocol all pref 1 matchall action mirred egress redirect dev $DEV2 sudo tc filter add dev $DEV2 ingress protocol all pref 1 matchall action mirred egress redirect dev $DEV1 sudo ip link set $DEV1 up sudo ip link set $DEV2 up Another possibility is to use virtme-ng like this: $ vng --network=loop or directly: $ vng --network=loop -- make -C tools/testing/selftests/ TARGETS=drivers/net/virtio_net/ run_tests "loop" network type will take care of creating two "hubport" qemu netdevs putting them into a single hub. To do it manually with qemu, pass following command line options: -nic hubport,hubid=1,id=nd0,model=virtio-net-pci -nic hubport,hubid=1,id=nd1,model=virtio-net-pci ==================== Link: https://lore.kernel.org/r/20240424104049.3935572-1-jiri@resnulli.usSigned-off-by:
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Jiri Pirko authored
Introduce initial tests for virtio_net driver. Focus on feature testing leveraging previously introduced debugfs feature filtering infrastructure. Add very basic ping and F_MAC feature tests. To run this, do: $ make -C tools/testing/selftests/ TARGETS=drivers/net/virtio_net/ run_tests Run it on a system with 2 virtio_net devices connected back-to-back on the hypervisor. Signed-off-by:
Benjamin Poirier <bpoirier@nvidia.com> Signed-off-by:
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Jiri Pirko authored
The existing setup_wait*() helper family check the status of the interface to be up. Introduce wait_for_dev() to wait for the netdevice to appear, for example after test script does manual device bind. Signed-off-by:
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Jiri Pirko authored
Add a helper to be used to check if the netdevice is backed by specified driver. Signed-off-by:
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Jiri Pirko authored
Allow driver tests to work without specifying the netdevice names. Introduce a possibility to search for available netdevices according to set driver name. Allow test to specify the name by setting NETIF_FIND_DRIVER variable. Note that user overrides this either by passing netdevice names on the command line or by declaring NETIFS array in custom forwarding.config configuration file. Signed-off-by:
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Jiri Pirko authored
Currently there is no way for user to set what features the driver should obey or not, it is hard wired in the code. In order to be able to debug the device behavior in case some feature is disabled, introduce a debugfs infrastructure with couple of files allowing user to see what features the device advertises and to set filter for features used by driver. Example: $cat /sys/bus/virtio/devices/virtio0/features 1110010111111111111101010000110010000000100000000000000000000000 $ echo "5" >/sys/kernel/debug/virtio/virtio0/filter_feature_add $ cat /sys/kernel/debug/virtio/virtio0/filter_features 5 $ echo "virtio0" > /sys/bus/virtio/drivers/virtio_net/unbind $ echo "virtio0" > /sys/bus/virtio/drivers/virtio_net/bind $ cat /sys/bus/virtio/devices/virtio0/features 1110000111111111111101010000110010000000100000000000000000000000 Note that sysfs "features" now already exists, this patch does not touch it. Signed-off-by:
Michael S. Tsirkin <mst@redhat.com> Signed-off-by:
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Paolo Abeni authored
Lukasz Majewski says: ==================== net: hsr: Add support for HSR-SAN (RedBOX) This patch set provides v6 of HSR-SAN (RedBOX) as well as hsr_redbox.sh test script. The most straightforward way to test those patches is to use buildroot (2024.02.01) to create rootfs and QEMU based environment to run x86_64 Linux. Then one shall run hsr_redbox.sh and hsr_ping.sh from tools/testing/selftests/net/hsr. ==================== Link: https://lore.kernel.org/r/20240423124908.2073400-1-lukma@denx.deSigned-off-by:
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Lukasz Majewski authored
This patch adds hsr_redbox.sh script to test if HSR-SAN mode of operation works correctly. Signed-off-by:
Lukasz Majewski <lukma@denx.de> Signed-off-by:
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Lukasz Majewski authored
Current code checks if ping command output match hardcoded pattern: "10 packets transmitted, 10 received, 0% packet loss,". Such approach will work only from one ping program version (for which this test has been originally written). This patch address problem when ping with different summary output like "10 packets transmitted, 10 packets received, 0% packet" is used to run this test - for example one from busybox (as the test system runs in QEMU with rootfs created with buildroot). The fix is to modify output of ping command to be agnostic to ping version used on the platform. Signed-off-by:
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Lukasz Majewski authored
Some of the code already present in the hsr_ping.sh test program can be moved to a separate script file, so it can be reused by other HSR functionality (like HSR-SAN) tests. Signed-off-by:
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Lukasz Majewski authored
Some parts (like netns creation and cleanup) of hsr_ping.sh script are already implemented in ../lib.sh common script, so can be replaced by it. Signed-off-by:
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Lukasz Majewski authored
Introduce RedBox support (HSR-SAN to be more precise) for HSR networks. Following traffic reduction optimizations have been implemented: - Do not send HSR supervisory frames to Port C (interlink) - Do not forward to HSR ring frames addressed to Port C - Do not forward to Port C frames from HSR ring - Do not send duplicate HSR frame to HSR ring when destination is Port C The corresponding patch to modify iptable2 sources has already been sent: https://lore.kernel.org/netdev/20240308145729.490863-1-lukma@denx.de/T/ Testing procedure (veth and netns): ----------------------------------- One shall run: linux-vanila/tools/testing/selftests/net/hsr/hsr_redbox.sh (Detailed description of the setup one can find in the test script file). Testing procedure (real hardware): ---------------------------------- The EVB-KSZ9477 has been used for testing on net-next branch (SHA1: 5fc68320). Ports 4/5 were used for SW managed HSR (hsr1) as first hsr0 for ports 1/2 (with HW offloading for ksz9477) was created. Port 3 has been used as interlink port (single USB-ETH dongle). Configuration - RedBox (EVB-KSZ9477): if link set lan1 down;ip link set lan2 down ip link add name hsr0 type hsr slave1 lan1 slave2 lan2 supervision 45 version 1 ip link add name hsr1 type hsr slave1 lan4 slave2 lan5 interlink lan3 supervision 45 version 1 ip link set lan4 up;ip link set lan5 up ip link set lan3 up ip addr add 192.168.0.11/24 dev hsr1 ip link set hsr1 up Configuration - DAN-H (EVB-KSZ9477): ip link set lan1 down;ip link set lan2 down ip link add name hsr0 type hsr slave1 lan1 slave2 lan2 supervision 45 version 1 ip link add name hsr1 type hsr slave1 lan4 slave2 lan5 supervision 45 version 1 ip link set lan4 up;ip link set lan5 up ip addr add 192.168.0.12/24 dev hsr1 ip link set hsr1 up This approach uses only SW based HSR devices (hsr1). -------------- ----------------- ------------ DAN-H Port5 | <------> | Port5 | | Port4 | <------> | Port4 Port3 | <---> | PC | | (RedBox) | | (USB-ETH) EVB-KSZ9477 | | EVB-KSZ9477 | | -------------- ----------------- ------------ Signed-off-by:
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Davide Caratti authored
Xiumei and Christoph reported the following lockdep splat, complaining of the qdisc root lock being taken twice: ============================================ WARNING: possible recursive locking detected 6.7.0-rc3+ #598 Not tainted -------------------------------------------- swapper/2/0 is trying to acquire lock: ffff888177190110 (&sch->q.lock){+.-.}-{2:2}, at: __dev_queue_xmit+0x1560/0x2e70 but task is already holding lock: ffff88811995a110 (&sch->q.lock){+.-.}-{2:2}, at: __dev_queue_xmit+0x1560/0x2e70 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&sch->q.lock); lock(&sch->q.lock); *** DEADLOCK *** May be due to missing lock nesting notation 5 locks held by swapper/2/0: #0: ffff888135a09d98 ((&in_dev->mr_ifc_timer)){+.-.}-{0:0}, at: call_timer_fn+0x11a/0x510 #1: ffffffffaaee5260 (rcu_read_lock){....}-{1:2}, at: ip_finish_output2+0x2c0/0x1ed0 #2: ffffffffaaee5200 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x209/0x2e70 #3: ffff88811995a110 (&sch->q.lock){+.-.}-{2:2}, at: __dev_queue_xmit+0x1560/0x2e70 #4: ffffffffaaee5200 (rcu_read_lock_bh){....}-{1:2}, at: __dev_queue_xmit+0x209/0x2e70 stack backtrace: CPU: 2 PID: 0 Comm: swapper/2 Not tainted 6.7.0-rc3+ #598 Hardware name: Red Hat KVM, BIOS 1.13.0-2.module+el8.3.0+7353+9de0a3cc 04/01/2014 Call Trace: <IRQ> dump_stack_lvl+0x4a/0x80 __lock_acquire+0xfdd/0x3150 lock_acquire+0x1ca/0x540 _raw_spin_lock+0x34/0x80 __dev_queue_xmit+0x1560/0x2e70 tcf_mirred_act+0x82e/0x1260 [act_mirred] tcf_action_exec+0x161/0x480 tcf_classify+0x689/0x1170 prio_enqueue+0x316/0x660 [sch_prio] dev_qdisc_enqueue+0x46/0x220 __dev_queue_xmit+0x1615/0x2e70 ip_finish_output2+0x1218/0x1ed0 __ip_finish_output+0x8b3/0x1350 ip_output+0x163/0x4e0 igmp_ifc_timer_expire+0x44b/0x930 call_timer_fn+0x1a2/0x510 run_timer_softirq+0x54d/0x11a0 __do_softirq+0x1b3/0x88f irq_exit_rcu+0x18f/0x1e0 sysvec_apic_timer_interrupt+0x6f/0x90 </IRQ> This happens when TC does a mirred egress redirect from the root qdisc of device A to the root qdisc of device B. As long as these two locks aren't protecting the same qdisc, they can be acquired in chain: add a per-qdisc lockdep key to silence false warnings. This dynamic key should safely replace the static key we have in sch_htb: it was added to allow enqueueing to the device "direct qdisc" while still holding the qdisc root lock. v2: don't use static keys anymore in HTB direct qdiscs (thanks Eric Dumazet) CC: Maxim Mikityanskiy <maxim@isovalent.com> CC: Xiumei Mu <xmu@redhat.com> Reported-by:Christoph Paasch <cpaasch@apple.com> Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/451Signed-off-by:
Davide Caratti <dcaratti@redhat.com> Link: https://lore.kernel.org/r/7dc06d6158f72053cf877a82e2a7a5bd23692faa.1713448007.git.dcaratti@redhat.comSigned-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queueJakub Kicinski authored
Tony Nguyen says: ==================== net: intel: start The Great Code Dedup + Page Pool for iavf Alexander Lobakin says: Here's a two-shot: introduce {,Intel} Ethernet common library (libeth and libie) and switch iavf to Page Pool. Details are in the commit messages; here's a summary: Not a secret there's a ton of code duplication between two and more Intel ethernet modules. Before introducing new changes, which would need to be copied over again, start decoupling the already existing duplicate functionality into a new module, which will be shared between several Intel Ethernet drivers. The first name that came to my mind was "libie" -- "Intel Ethernet common library". Also this sounds like "lovelie" (-> one word, no "lib I E" pls) and can be expanded as "lib Internet Explorer" :P The "generic", pure-software part is placed separately, so that it can be easily reused in any driver by any vendor without linking to the Intel pre-200G guts. In a few words, it's something any modern driver does the same way, but nobody moved it level up (yet). The series is only the beginning. From now on, adding every new feature or doing any good driver refactoring will remove much more lines than add for quite some time. There's a basic roadmap with some deduplications planned already, not speaking of that touching every line now asks: "can I share this?". The final destination is very ambitious: have only one unified driver for at least i40e, ice, iavf, and idpf with a struct ops for each generation. That's never gonna happen, right? But you still can at least try. PP conversion for iavf lands within the same series as these two are tied closely. libie will support Page Pool model only, so that a driver can't use much of the lib until it's converted. iavf is only the example, the rest will eventually be converted soon on a per-driver basis. That is when it gets really interesting. Stay tech. * '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue: MAINTAINERS: add entry for libeth and libie iavf: switch to Page Pool iavf: pack iavf_ring more efficiently libeth: add Rx buffer management page_pool: add DMA-sync-for-CPU inline helper page_pool: constify some read-only function arguments slab: introduce kvmalloc_array_node() and kvcalloc_node() iavf: drop page splitting and recycling iavf: kill "legacy-rx" for good net: intel: introduce {, Intel} Ethernet common library ==================== Link: https://lore.kernel.org/r/20240424203559.3420468-1-anthony.l.nguyen@intel.comSigned-off-by: -
Jakub Kicinski authored
Asbjørn Sloth Tønnesen says: ==================== net: lan966x: flower: validate control flags This series adds flower control flags validation to the lan966x driver, and changes it from assuming that it handles all control flags, to instead reject rules if they have masked any unknown/unsupported control flags. v1: https://lore.kernel.org/netdev/20240423102720.228728-1-ast@fiberby.net/ ==================== Link: https://lore.kernel.org/r/20240424125347.461995-1-ast@fiberby.netSigned-off-by:
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Asbjørn Sloth Tønnesen authored
Use flow_rule_is_supp_control_flags() to reject filters with unsupported control flags. In case any unsupported control flags are masked, flow_rule_is_supp_control_flags() sets a NL extended error message, and we return -EOPNOTSUPP. Only compile-tested. Signed-off-by:
Asbjørn Sloth Tønnesen <ast@fiberby.net> Reviewed-by:
Horatiu Vultur <horatiu.vultur@microchip.com> Link: https://lore.kernel.org/r/20240424125347.461995-4-ast@fiberby.netSigned-off-by:
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Asbjørn Sloth Tønnesen authored
Rename goto label, as the error message is specific to the fragment flags. Only compile-tested. Signed-off-by:
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Asbjørn Sloth Tønnesen authored
Define extack locally, to reduce line lengths and aid future users. Only compile-tested. Signed-off-by:
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Jakub Kicinski authored
Asbjørn Sloth Tønnesen says: ==================== net: sparx5: flower: validate control flags This series adds flower control flags validation to the sparx5 driver, and changes it from assuming that it handles all control flags, to instead reject rules if they have masked any unknown/unsupported control flags. Reviewed-by:
Daniel Machon <daniel.machon@microchip.com> Tested-by:
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