What Is eBPF? - IBM
2023年9月13日 · eBPF programs are initially written in a restricted C subset and then compiled into eBPF bytecode by using tools such as LLVM, which serves as the eBPF’s back-end …
什么是 eBPF？ - IBM
当事件发生时，eBPF 执行相应的字节码程序，从而允许开发人员检查和操作系统的各种组件。 一旦 eBPF 程序运行，开发人员就可以使用 eBPF 地图从用户空间与程序交互。例如，应用程序 …
eBPF - difference between loading, attaching, and linking?
2021年7月6日 · eBPF links are not to be confused with linking of the ELF object files used to store the bytecode before it is loaded into the kernel. For example, libbpf is able to link several …
eBPF란 무엇인가요? - IBM
eBPF 프로그램이 실행되면 개발자는 eBPF 맵을 사용하여 사용자 공간에서 프로그램과 상호 작용할 수 있습니다. 예를 들어, 애플리케이션은 주기적으로 맵을 확인하여 eBPF 프로그램에서 데이터를 …
How to generate delay using eBPF kernel program
2022年6月9日 · The actual delay happens outside of the eBPF program, in the TC subsystem. You can request TC to send the packet at a given time by setting __sk_buff->tstamp. Note: …
Failed to load eBPF program - Stack Overflow
2024年4月23日 · I am eBPF newbie, in order to learn the concepts trying to tweak existing filetop from https://github.com ...
Can eBPF modify the return value or parameters of a syscall?
2017年3月24日 · Within kernel probes (kprobes), the eBPF virtual machine has read-only access to the syscall parameters and return value. However the eBPF program will have a return code …
Could use memcpy or memset in ebpf prog - Stack Overflow
2024年6月8日 · I have follow ebpf prog, but when compile with clang, it reported error: A call to built-in function 'memset' is not supported for ip4_str[m++] = temp[j];. In ebpf prog, we can't …
c - ebpf compare two dynamic sized strings - Stack Overflow
2024年6月9日 · Unfortunately, that isn't available in eBPF programs. Instead, if your kernel and program type support it, you may be able to use the bpf_strncmp helper: long …
ebpf: drop ICMP packet in socket filter program on lo interface
2021年5月26日 · In my case, ebpf application basically creates a tap socket (AF_PACKET raw socket), which will be handed ingress packets before they are delivered up to a protocol layer. …