2024 Bpf redirect

Bpf redirect

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August undefined, 2024

http://bankbp.com/ WebNov 10, 2024 · There are two types of Local Redirect Policies supported. When traffic for a Kubernetes service needs to be redirected, use the ServiceMatcher type. When traffic …

Cloudflare architecture and how BPF eats the world

WebThe BPF program (below) is redirecting packets using the ingress ifindex as the key. SEC("xdp") int xdp_redirect_map_func(struct xdp_md *ctx) { int index = ctx->ingress_ifindex; return bpf_redirect_map(&forward_map, index, 0); } The following code snippet shows a BPF program that is broadcasting packets to all the interfaces in the … http://arthurchiao.art/blog/differentiate-bpf-redirects/ sky red button games tonight

[PATCH bpf-next v3 0/3] Add FOU support for externally …

WebMay 26, 2024 · / and done, now we set the action to bpf_redirect_map with fib_params.ifindex which is the egress port as paramater / action = bpf_redirect_map(&tx_port, fib_params.ifindex, 0); break; case BPF_FIB_LKUP_RET_BLACKHOLE: / dest is blackholed; can be dropped / case … WebeBPF is an extended version of the Berkeley Packet Filter (BPF). It is an abstract virtual machine (VM) that runs within the Linux kernel, much like the Java Virtual Machine … WebThe bpf_redirect() and bpf_redirect_map() helpers will lookup the target of the redirect and store it (along with some other metadata) in a per-CPU struct bpf_redirect_info. When … sweatpants customized down leg

Cilium 1.9: Maglev, Deny Policies, VM Support, OpenShift, Hubble …

eBPF: Put the Kubernetes Data Plane in the Kernel

WebMay 11, 2024 · And the BPF prog from cilium_vxlan/geneve will redirect at tc layer to the Pod. From the Pod in bpf_lxc, it will redirect back to the tunnel dev. The one difference here for Pod-Pod case is that due to the use of redirect_peer() it will decrease the latency slightly due to not having to switch to the different netns via net_rx_action. WebThis directory contains documentation for the BPF (Berkeley Packet Filter) facility, with a focus on the extended BPF version (eBPF). This kernel side documentation is still work in progress. The Cilium project also maintains a BPF and XDP Reference Guide that goes into great technical depth about the BPF Architecture. sweatpants cute comfy outfitsWebint bpf_redirect(u32 ifindex, u64 flags) Description. Redirect the packet to another net device of index ifindex. This helper is somewhat similar to bpf_clone_redirect(), except that the packet is not cloned, which provides increased performance. Except for XDP, both ingress and egress interfaces can be used for redirection. sweatpants cute

"WebDec 9, 2024 · i have a question about how exactly bpf redirect working BPF_MAP_TYPE_CPUMAP array, i saw it's a new feture on xdp-project repo and read are adding ability to run another (2nd) XDP-prog on the remote CPU the XDP packets is getting redirected to, i read the userspace code and i'm quite confused because i see a … " - Bpf redirect

Bpf redirect

WebXDP_REDIRECT works by a three-step process, implemented in the functions below: The bpf_redirect () and bpf_redirect_map () helpers will lookup the target of the redirect and store it (along with some other metadata) in a per-CPU struct bpf_redirect_info. WebJan 15, 2024 · BPF_MAP_TYPE_SOCKMAP: sockmaps are used primarily for socket redirection, where sockets added to a socket map and referenced by a key which dictates redirection when bpf_sockmap_redirect () is called. BPF_MAP_TYPE_DEVMAP: does a similar job to sockmap, with netdevices for XDP and bpf_redirect (). 2. Perf Events

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WebOct 9, 2024 · Add an efficient ingress to ingress netns switch that can be used out of tc BPF programs in order to redirect traffic from host ns ingress into a container veth device ingress without having to go via CPU backlog queue [0]. For local containers this can also be utilized and path via CPU backlog queue only needs Web/* bpf_redirect_peer() is available only in TC BPF. */ return -ENOTSUP;} static __always_inline __maybe_unused __u64: ctx_full_len(const struct xdp_md *ctx) {__u64 len; /* Compute the length using inline assembly as clang * …

http://arthurchiao.art/blog/differentiate-bpf-redirects/#:~:text=long%20bpf_redirect%20%28ifindex%2C%20flags%29%20can%20be%20used%20to,with%20clone_redirect%20%28%29%20according%20to%20the%20commit%20message%29. WebAug 15, 2024 · Then with a new sk redirect bpf helper BPF programs can use the map to redirect skbs between sockets, bpf_sk_redirect_map (map, key, flags) Finally, we need a call site to attach our BPF logic to do socket redirects. We added hooks to recv_sock using the existing strparser infrastructure to do this.

WebThe BPF_MAP_TYPE_XSKMAP is used as a backend map for XDP BPF helper call bpf_redirect_map() and XDP_REDIRECT action, like ‘devmap’ and ‘cpumap’. This map … WebOct 9, 2024 · Add an efficient ingress to ingress netns switch that can be used out of tc BPF programs in order to redirect traffic from host ns ingress into a container veth device …

Weblinux/samples/bpf/xdp_redirect_cpu_user.c Go to file Cannot retrieve contributors at this time 559 lines (502 sloc) 14.9 KB Raw Blame // SPDX-License-Identifier: GPL-2.0-only /* Copyright (c) 2024 Jesper Dangaard Brouer, Red Hat, Inc. */ static const char *__doc__ = "XDP CPU redirect tool, using BPF_MAP_TYPE_CPUMAP\n"

WebWe can't redirect ingress packet to ifb with bpf > By trying to analyze if it is possible to redirect the ingress packet to > ifb with a bpf program, we find that the ifb device is not supported by > bpf redirect yet. You actually can: Just let BPF program return TC_ACT_UNSPEC for this case and then add a matchall with higher prio (so it runs ... sky red button on virgin mediaWebThis chapter provides the complete list of Berkeley Packet Filter ( BPF) features available in the kernel of this minor version of Red Hat Enterprise Linux 8. The tables include the lists of: System configuration and other options Available program types and supported helpers Available map types sky red capeWebThis approach introduces a flag in bpf_redirect_info to indicate that napi_direct should be disabled even when _rx_napi variant is used as well as helper functions to use it. A NAPI handler who wants to use this flag needs to call xdp_set_return_frame_no_direct() before processing packets, and call xdp_clear_return_frame_no_direct() after xdp ... sky red heart vector hdWeblong bpf_redirect(ifindex, flags) can be used to redirect the given packet to the given net device identified with ifindex. This helper is somewhat similar to bpf_clone_redirect(), … sky red button matches todayWebJul 17, 2024 · Implement XDP bpf_redirect This series adds two new XDP helper routines bpf_redirect () and bpf_redirect_map (). The first variant bpf_redirect () is meant to be … sky red sea diving \u0026 aqua centerWebMar 1, 2024 · The first redirect (Step 3) is working fine and with the performance numbers expected. But the second redirect at step 4 (that is from the interface we modified the … sweatpants cute outfitWebNetdev Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH bpf-next 0/6] Follow-up BPF helper improvements @ 2024-10-08 21:31 Daniel Borkmann 2024-10-08 21:31 ` [PATCH bpf-next 1/6] bpf: improve bpf_redirect_neigh helper description Daniel Borkmann ` (5 more replies) 0 siblings, 6 replies; 11+ messages in thread From: Daniel … sweatpants cute for girls