89008b6063
Bugzilla: https://bugzilla.redhat.com/2120966 commit cbdaf71f7e65a45d6e96378ee7bfe3da39c30908 Author: Dmitrii Dolgov <9erthalion6@gmail.com> Date: Wed Mar 9 17:31:12 2022 +0100 bpftool: Add bpf_cookie to link output Commit 82e6b1eee6a8 ("bpf: Allow to specify user-provided bpf_cookie for BPF perf links") introduced the concept of user specified bpf_cookie, which could be accessed by BPF programs using bpf_get_attach_cookie(). For troubleshooting purposes it is convenient to expose bpf_cookie via bpftool as well, so there is no need to meddle with the target BPF program itself. Implemented using the pid iterator BPF program to actually fetch bpf_cookies, which allows constraining code changes only to bpftool. $ bpftool link 1: type 7 prog 5 bpf_cookie 123 pids bootstrap(81) Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Acked-by: Quentin Monnet <quentin@isovalent.com> Link: https://lore.kernel.org/bpf/20220309163112.24141-1-9erthalion6@gmail.com Signed-off-by: Jerome Marchand <jmarchan@redhat.com> |
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| pid_iter.bpf.c | ||
| pid_iter.h | ||
| profiler.bpf.c | ||