- 18 Aug, 2019 5 commits
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Huazhong Tan authored
MAC TNL interrupt is used to collect statistic info about link status changing suddenly when netdev is running. But when stopping netdev, the enabled MAC TNL interrupt is unnecessary, and may add some noises to the statistic info. So this patch disables it before stopping MAC. Fixes: a6345787 ("net: hns3: Add handling of MAC tunnel interruption") Signed-off-by:
Huazhong Tan <tanhuazhong@huawei.com> Reviewed-by:
Yunsheng Lin <linyunsheng@huawei.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Xiaofei Tan authored
This patch changes print level of RAS error log from warning to error. Because RAS error and its recovery process could cause application failure. Also uses %u instead of %d when the parameter is unsigned. Signed-off-by:
Xiaofei Tan <tanxiaofei@huawei.com> Signed-off-by:
Weihang Li <liweihang@hisilicon.com> Signed-off-by:
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Guojia Liao authored
The pointer type parameter should be declare as const for preventing from its pointed value being unexpected modified. The uninitialized variable can not be return directly. The default return value is 0 if no abnormal result. This patch fixes the preceding two errors, deletes redundant declaration of a function and align one parameter. Signed-off-by:
Guojia Liao <liaoguojia@huawei.com> Signed-off-by:
Jian Shen <shenjian15@huawei.com> Signed-off-by:
Guangbin Huang <huangguangbin2@huawei.com> Signed-off-by:
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Guojia Liao authored
Some temporary variables do not need to be initialized that they will be set before used, so this patch deletes the initialization value of these temporary variables. Signed-off-by:
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Guojia Liao authored
To explain some code, this patch adds some comments, and modifies or merges some comments to make them more neat. Signed-off-by:
Zhongzhu Liu <liuzhongzhu@huawei.com> Signed-off-by:
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- 17 Aug, 2019 35 commits
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David S. Miller authored
Jose Abreu says: ==================== net: stmmac: Improvements for -next Couple of improvements for -next tree. More info in commit logs. ==================== Signed-off-by: -
Jose Abreu authored
Add 2 new selftests for VLAN Insertion offloading. Tests are for inner and outer VLAN offloading. Signed-off-by:
Jose Abreu <joabreu@synopsys.com> Signed-off-by:
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Jose Abreu authored
Adds the logic to insert a given VLAN ID in a packet. This is offloaded to HW and its descriptor based. For now, only XGMAC implements the necessary callbacks. Signed-off-by:
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Jose Abreu authored
Add support for EEE in XGMAC cores by implementing the necessary callbacks. Signed-off-by:
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Jose Abreu authored
Add 4 new tests: - SA Insertion (register based) - SA Insertion (descriptor based) - SA Replacament (register based) - SA Replacement (descriptor based) Signed-off-by:
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Jose Abreu authored
Add the support for Source Address Insertion and Replacement in XGMAC cores. Two methods are supported: Descriptor based and register based. Signed-off-by:
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Jose Abreu authored
Add the ethtool interface to dump the register map in XGMAC cores. Changes from v2: - Remove uneeded memset (Jakub) Signed-off-by:
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Jose Abreu authored
Add the support for Flexible PPS in XGMAC cores. Signed-off-by:
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Jose Abreu authored
Add a counter that increments each time a packet with split header is received. Signed-off-by:
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Jose Abreu authored
Add the support for Split Header feature in the RX path and enable it in XGMAC cores. This does not impact neither beneficts bandwidth but it does reduces CPU usage because without the feature all the entire packet is memcpy'ed, while that with the feature only the header is. With Split Header disabled 'perf stat -d' gives: 86870.624945 task-clock (msec) # 0.429 CPUs utilized 1073352 context-switches # 0.012 M/sec 1 cpu-migrations # 0.000 K/sec 213 page-faults # 0.002 K/sec 327113872376 cycles # 3.766 GHz (62.53%) 56618161216 instructions # 0.17 insn per cycle (75.06%) 10742205071 branches # 123.658 M/sec (75.36%) 584309242 branch-misses # 5.44% of all branches (75.19%) 17594787965 L1-dcache-loads # 202.540 M/sec (74.88%) 4003773131 L1-dcache-load-misses # 22.76% of all L1-dcache hits (74.89%) 1313301468 LLC-loads # 15.118 M/sec (49.75%) 355906510 LLC-load-misses # 27.10% of all LL-cache hits (49.92%) With Split Header enabled 'perf stat -d' gives: 49324.456539 task-clock (msec) # 0.245 CPUs utilized 2542387 context-switches # 0.052 M/sec 1 cpu-migrations # 0.000 K/sec 213 page-faults # 0.004 K/sec 177092791469 cycles # 3.590 GHz (62.30%) 68555756017 instructions # 0.39 insn per cycle (75.16%) 12697019382 branches # 257.418 M/sec (74.81%) 442081897 branch-misses # 3.48% of all branches (74.79%) 20337958358 L1-dcache-loads # 412.330 M/sec (75.46%) 3820210140 L1-dcache-load-misses # 18.78% of all L1-dcache hits (75.35%) 1257719198 LLC-loads # 25.499 M/sec (49.73%) 685543923 LLC-load-misses # 54.51% of all LL-cache hits (49.86%) Changes from v2: - Reword commit message (Jakub) Changes from v1: - Add performance info (David) - Add misssing dma_sync_single_for_device() Signed-off-by: -
Jose Abreu authored
Return the correct value when RX descriptor is not the last one. Signed-off-by:
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Jose Abreu authored
In order to add Split Header support, stmmac_rx() needs to take into account that packet may be split accross multiple descriptors. Refactor the logic of this function in order to support this scenario. Changes from v2: - Fixup if condition detection (Jakub) - Don't stop NAPI with unfinished packet (Jakub) - Use napi_alloc_skb() (Jakub) Signed-off-by:
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Jose Abreu authored
TX Timestamp in XGMAC comes from MAC instead of descriptors. Implement this in a new callback. Also, RX Timestamp in XGMAC must be cheked against corruption and we need a barrier to make sure that descriptor fields are read correctly. Changes from v2: - Rework return code check (Jakub) Changes from v1: - Rework the get timestamp function (David) Signed-off-by:
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David S. Miller authored
Ido Schimmel says: ==================== Add drop monitor for offloaded data paths Users have several ways to debug the kernel and understand why a packet was dropped. For example, using drop monitor and perf. Both utilities trace kfree_skb(), which is the function called when a packet is freed as part of a failure. The information provided by these tools is invaluable when trying to understand the cause of a packet loss. In recent years, large portions of the kernel data path were offloaded to capable devices. Today, it is possible to perform L2 and L3 forwarding in hardware, as well as tunneling (IP-in-IP and VXLAN). Different TC classifiers and actions are also offloaded to capable devices, at both ingress and egress. However, when the data path is offloaded it is not possible to achieve the same level of introspection since packets are dropped by the underlying device and never reach the kernel. This patchset aims to solve this by allowing users to monitor packets that the underlying device decided to drop along with relevant metadata such as the drop reason and ingress port. The above is achieved by exposing a fundamental capability of devices capable of data path offloading - packet trapping. In much the same way as drop monitor registers its probe function with the kfree_skb() tracepoint, the device is instructed to pass to the CPU (trap) packets that it decided to drop in various places in the pipeline. The configuration of the device to pass such packets to the CPU is performed using devlink, as it is not specific to a port, but rather to a device. In the future, we plan to control the policing of such packets using devlink, in order not to overwhelm the CPU. While devlink is used as the control path, the dropped packets are passed along with metadata to drop monitor, which reports them to userspace as netlink events. This allows users to use the same interface for the monitoring of both software and hardware drops. Logically, the solution looks as follows: Netlink event: Packet w/ metadata Or a summary of recent drops ^ | Userspace | +---------------------------------------------------+ Kernel | | +-------+--------+ | | | drop_monitor | | | +-------^--------+ | | | +----+----+ | | Kernel's Rx path | devlink | (non-drop traps) | | +----^----+ ^ | | +-----------+ | +-------+-------+ | | | Device driver | | | +-------^-------+ Kernel | +---------------------------------------------------+ Hardware | | Trapped packet | +--+---+ | | | ASIC | | | +------+ In order to reduce the patch count, this patchset only includes integration with netdevsim. A follow-up patchset will add devlink-trap support in mlxsw. Patches #1-#7 extend drop monitor to also monitor hardware originated drops. Patches #8-#10 add the devlink-trap infrastructure. Patches #11-#12 add devlink-trap support in netdevsim. Patches #13-#16 add tests for the generic infrastructure over netdevsim. Example ======= Instantiate netdevsim --------------------- List supported traps -------------------- netdevsim/netdevsim10: name source_mac_is_multicast type drop generic true action drop group l2_drops name vlan_tag_mismatch type drop generic true action drop group l2_drops name ingress_vlan_filter type drop generic true action drop group l2_drops name ingress_spanning_tree_filter type drop generic true action drop group l2_drops name port_list_is_empty type drop generic true action drop group l2_drops name port_loopback_filter type drop generic true action drop group l2_drops name fid_miss type exception generic false action trap group l2_drops name blackhole_route type drop generic true action drop group l3_drops name ttl_value_is_too_small type exception generic true action trap group l3_drops name tail_drop type drop generic true action drop group buffer_drops Enable a trap ------------- Query statistics ---------------- netdevsim/netdevsim10: name blackhole_route type drop generic true action trap group l3_drops stats: rx: bytes 7384 packets 52 Monitor dropped packets ----------------------- dropwatch> set alertmode packet Setting alert mode Alert mode successfully set dropwatch> set sw true setting software drops monitoring to 1 dropwatch> set hw true setting hardware drops monitoring to 1 dropwatch> start Enabling monitoring... Kernel monitoring activated. Issue Ctrl-C to stop monitoring drop at: ttl_value_is_too_small (l3_drops) origin: hardware input port ifindex: 55 input port name: eth0 timestamp: Mon Aug 12 10:52:20 2019 445911505 nsec protocol: 0x800 length: 142 original length: 142 drop at: ip6_mc_input+0x8b8/0xef8 (0xffffffff9e2bb0e8) origin: software input port ifindex: 4 timestamp: Mon Aug 12 10:53:37 2019 024444587 nsec protocol: 0x86dd length: 110 original length: 110 Future plans ============ * Provide more drop reasons as well as more metadata * Add dropmon support to libpcap, so that tcpdump/tshark could specifically listen on dropmon traffic, instead of capturing all netlink packets via nlmon interface Changes in v3: * Place test with the rest of the netdevsim tests * Fix test to load netdevsim module * Move devlink helpers from the test to devlink_lib.sh. Will be used by mlxsw tests * Re-order netdevsim includes in alphabetical order * Fix reverse xmas tree in netdevsim * Remove double include in netdevsim Changes in v2: * Use drop monitor to report dropped packets instead of devlink * Add drop monitor patches * Add test cases ==================== Signed-off-by: -
Ido Schimmel authored
Signed-off-by:
Ido Schimmel <idosch@mellanox.com> Acked-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
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Ido Schimmel authored
Add test cases for devlink-trap on top of the netdevsim implementation. The tests focus on the devlink-trap core infrastructure and user space API. They test both good and bad flows and also dismantle of the netdev and devlink device used to report trapped packets. This allows device drivers to focus their tests on device-specific functionality. Signed-off-by:
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Ido Schimmel authored
Add helpers to interact with devlink-trap, such as setting the action of a trap and retrieving statistics. Signed-off-by:
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Ido Schimmel authored
For tests that create their network interfaces dynamically or do not use interfaces at all (as with netdevsim) it is useful to define their own devlink device instead of deriving it from the first network interface. Signed-off-by:
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Ido Schimmel authored
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Ido Schimmel authored
Have netdevsim register its trap groups and traps with devlink during initialization and periodically report trapped packets to devlink core. Since netdevsim is not a real device, the trapped packets are emulated using a workqueue that periodically reports a UDP packet with a random 5-tuple from each active packet trap and from each running netdev. Signed-off-by:
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Ido Schimmel authored
Add initial documentation of the devlink-trap mechanism, explaining the background, motivation and the semantics of the interface. Signed-off-by:
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Ido Schimmel authored
Add generic packet traps and groups that can report dropped packets as well as exceptions such as TTL error. Signed-off-by:
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Ido Schimmel authored
Add the basic packet trap infrastructure that allows device drivers to register their supported packet traps and trap groups with devlink. Each driver is expected to provide basic information about each supported trap, such as name and ID, but also the supported metadata types that will accompany each packet trapped via the trap. The currently supported metadata type is just the input port, but more will be added in the future. For example, output port and traffic class. Trap groups allow users to set the action of all member traps. In addition, users can retrieve per-group statistics in case per-trap statistics are too narrow. In the future, the trap group object can be extended with more attributes, such as policer settings which will limit the amount of traffic generated by member traps towards the CPU. Beside registering their packet traps with devlink, drivers are also expected to report trapped packets to devlink along with relevant metadata. devlink will maintain packets and bytes statistics for each packet trap and will potentially report the trapped packet with its metadata to user space via drop monitor netlink channel. The interface towards the drivers is simple and allows devlink to set the action of the trap. Currently, only two actions are supported: 'trap' and 'drop'. When set to 'trap', the device is expected to provide the sole copy of the packet to the driver which will pass it to devlink. When set to 'drop', the device is expected to drop the packet and not send a copy to the driver. In the future, more actions can be added, such as 'mirror'. Signed-off-by:
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Ido Schimmel authored
Drop monitor has start and stop commands, but so far these were only used to start and stop monitoring of software drops. Now that drop monitor can also monitor hardware drops, we should allow the user to control these as well. Do that by adding SW and HW flags to these commands. If no flag is specified, then only start / stop monitoring software drops. This is done in order to maintain backward-compatibility with existing user space applications. Signed-off-by:
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Ido Schimmel authored
In summary alert mode a notification is sent with a list of recent drop reasons and a count of how many packets were dropped due to this reason. To avoid expensive operations in the context in which packets are dropped, each CPU holds an array whose number of entries is the maximum number of drop reasons that can be encoded in the netlink notification. Each entry stores the drop reason and a count. When a packet is dropped the array is traversed and a new entry is created or the count of an existing entry is incremented. Later, in process context, the array is replaced with a newly allocated copy and the old array is encoded in a netlink notification. To avoid breaking user space, the notification includes the ancillary header, which is 'struct net_dm_alert_msg' with number of entries set to '0'. Signed-off-by:
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Ido Schimmel authored
In a similar fashion to software drops, extend drop monitor to send netlink events when packets are dropped by the underlying hardware. The main difference is that instead of encoding the program counter (PC) from which kfree_skb() was called in the netlink message, we encode the hardware trap name. The two are mostly equivalent since they should both help the user understand why the packet was dropped. Signed-off-by:
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Ido Schimmel authored
The drop monitor configuration (e.g., alert mode) is global, but user will be able to enable monitoring of only software or hardware drops. Therefore, ensure that monitoring of both software and hardware drops are disabled before allowing drop monitor configuration to take place. Signed-off-by:
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Ido Schimmel authored
Export a function that can be invoked in order to report packets that were dropped by the underlying hardware along with metadata. Subsequent patches will add support for the different alert modes. Signed-off-by:
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Ido Schimmel authored
Like software drops, hardware drops also need the same type of per-CPU data. Therefore, initialize it during module initialization and de-initialize it during module exit. Signed-off-by:
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Ido Schimmel authored
Currently drop monitor only reports software drops to user space, but subsequent patches are going to add support for hardware drops. Like software drops, the per-CPU data of hardware drops needs to be initialized and de-initialized upon module initialization and exit. To avoid code duplication, break this code into separate functions, so that these could be re-used for hardware drops. No functional changes intended. Signed-off-by:
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David S. Miller authored
Nikolay Aleksandrov says: ==================== net: bridge: mdb: allow dump/add/del of host-joined entries This set makes the bridge dump host-joined mdb entries, they should be treated as normal entries since they take a slot and are aging out. We already have notifications for them but we couldn't dump them until now so they remained hidden. We dump them similar to how they're notified, in order to keep user-space compatibility with the dumped objects (e.g. iproute2 dumps mdbs in a format which can be fed into add/del commands) we allow host-joined groups also to be added/deleted via mdb commands. That can later be used for L2 mcast MAC manipulation as was recently discussed. Note that iproute2 changes are not necessary, this set will work with the current user-space mdb code. Patch 01 - a trivial comment move Patch 02 - factors out the mdb filling code so it can be re-used for the host-joined entries Patch 03 - dumps host-joined entries Patch 04 - allows manipulation of host-joined entries via standard mdb calls v3: fix compiler warning in patch 04 (DaveM) v2: change patch 04 to avoid double notification and improve host group manual removal if no ports are present in the group ==================== Signed-off-by: -
Nikolay Aleksandrov authored
Currently this is needed only for user-space compatibility, so similar object adds/deletes as the dumped ones would succeed. Later it can be used for L2 mcast MAC add/delete. v3: fix compiler warning (DaveM) v2: don't send a notification when used from user-space, arm the group timer if no ports are left after host entry del Signed-off-by:Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by:
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Nikolay Aleksandrov authored
Currently we dump only the port mdb entries but we can have host-joined entries on the bridge itself and they should be treated as normal temp mdbs, they're already notified: $ bridge monitor all [MDB]dev br0 port br0 grp ff02::8 temp The group will not be shown in the bridge mdb output, but it takes 1 slot and it's timing out. If it's only host-joined then the mdb show output can even be empty. After this patch we show the host-joined groups: $ bridge mdb show dev br0 port br0 grp ff02::8 temp Signed-off-by:
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Nikolay Aleksandrov authored
We have to factor out the mdb fill portion in order to re-use it later for the bridge mdb entries. No functional changes intended. Signed-off-by:
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Nikolay Aleksandrov authored
Trivial patch to move the vlan comments in their proper places above the vid 0 checks. Signed-off-by:
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