WebJan 8, 2024 · Notes on BPF (1) - A Tour of Progam Types. Oracle Linux kernel developer Alan Maguire presents this six-part series on BPF, wherein he presents an in depth look at the … WebMar 12, 2024 · > Currently, bpf_prog_info includes 9 arrays. The user has the option to > fetch any combination of these arrays. However, this requires a lot of > handling of these arrays. This work becomes more tricky when we need to > store bpf_prog_info to a file, because these arrays are allocated > independently. >
Running BPF programs from userspace - Linux kernel
WebBPF_PROG_QUERY always fetches the number of programs attached and the attach_flags which were used to attach those programs. Additionally, if prog_ids is nonzero and the … WebDec 14, 2024 · In this case, instead of using links from struct __bpf, you need to define an array: struct bpf_link *links []. The reason is that perf_event needs to be opened separately on each CPU. After this, open and attach perf_event by yourself: { … frissitések kikapcsolása
[PATCH 03/31] BPF: Add @prog to bpf_struct_ops …
WebFor example, it can show pinned paths for BPF programs, maps, and links; or programs and maps using a given BTF object; or the names and PIDs of processes referencing BPF objects. To collect this information, bpftool uses hash maps (to be clear: the data structures, inside bpftool - we are not talking of BPF maps). WebNov 6, 2024 · The next two enums are bpf_map_type and, missing from the bpf man page, the full list of program types in bpf_prog_type . Not all program types are loaded in the same way. How you load a bpf ... WebBPF_PROG_LOAD Description Verify and load an eBPF program, returning a new file descriptor associated with the program. Applying close (2) to the file descriptor returned by BPF_PROG_LOAD will unload the eBPF program (but see NOTES). The close-on-exec file descriptor flag (see fcntl (2)) is automatically enabled for the new file descriptor. Return layton john