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668ace0ea5
Detect kernel support for BPF perf link and prefer it when attaching to perf_event, tracepoint, kprobe/uprobe. Underlying perf_event FD will be kept open until BPF link is destroyed, at which point both perf_event FD and BPF link FD will be closed. This preserves current behavior in which perf_event FD is open for the duration of bpf_link's lifetime and user is able to "disconnect" bpf_link from underlying FD (with bpf_link__disconnect()), so that bpf_link__destroy() doesn't close underlying perf_event FD.When BPF perf link is used, disconnect will keep both perf_event and bpf_link FDs open, so it will be up to (advanced) user to close them. This approach is demonstrated in bpf_cookie.c selftests, added in this patch set. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210815070609.987780-10-andrii@kernel.org |
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.. | ||
api | ||
bpf | ||
lockdep | ||
perf | ||
subcmd | ||
symbol | ||
traceevent | ||
argv_split.c | ||
bitmap.c | ||
ctype.c | ||
find_bit.c | ||
hweight.c | ||
rbtree.c | ||
str_error_r.c | ||
string.c | ||
vsprintf.c | ||
zalloc.c |