kernel/linux.git/samples/bpf/trace_common.h, branch v6.1.168Linux kernel stable tree (mirror)https://git.radix-linux.su/kernel/linux.git/atom?h=v6.1.1682020-05-19T15:12:53+00:00samples, bpf: Refactor kprobe tracing user progs with libbpf2020-05-19T15:12:53+00:00Daniel T. Leedanieltimlee@gmail.com2020-05-16T04:06:05+00:00urn:sha1:63841bc0833623ecd4f758ec055b543cf1bc56ba
Currently, the kprobe BPF program attachment method for bpf_load is
quite old. The implementation of bpf_load "directly" controls and
manages(create, delete) the kprobe events of DEBUGFS. On the other hand,
using using the libbpf automatically manages the kprobe event.
(under bpf_link interface)
By calling bpf_program__attach(_kprobe) in libbpf, the corresponding
kprobe is created and the BPF program will be attached to this kprobe.
To remove this, by simply invoking bpf_link__destroy will clean up the
event.
This commit refactors kprobe tracing programs (tracex{1~7}_user.c) with
libbpf using bpf_link interface and bpf_program__attach.
tracex2_kern.c, which tracks system calls (sys_*), has been modified to
append prefix depending on architecture.
Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200516040608.1377876-3-danieltimlee@gmail.com