diff options
| author | Wang Nan <wangnan0@huawei.com> | 2015-07-01 02:13:50 +0000 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-08-06 15:29:14 -0300 |
| commit | 04a22fae4cbc1f7d3f7471e9b36359f98bd3f043 (patch) | |
| tree | 56aaf8966290b8718c6792ec0df9095221fd8d8a /kernel/events | |
| parent | 098d2164e3441c252eaa28906d45e16b7bf1bd2b (diff) | |
| download | linux-04a22fae4cbc1f7d3f7471e9b36359f98bd3f043.tar.bz2 | |
tracing, perf: Implement BPF programs attached to uprobes
By copying BPF related operation to uprobe processing path, this patch
allow users attach BPF programs to uprobes like what they are already
doing on kprobes.
After this patch, users are allowed to use PERF_EVENT_IOC_SET_BPF on a
uprobe perf event. Which make it possible to profile user space programs
and kernel events together using BPF.
Because of this patch, CONFIG_BPF_EVENTS should be selected by
CONFIG_UPROBE_EVENT to ensure trace_call_bpf() is compiled even if
KPROBE_EVENT is not set.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kaixu Xia <xiakaixu@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1435716878-189507-3-git-send-email-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'kernel/events')
| -rw-r--r-- | kernel/events/core.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index bdea12924b11..77f9e5d0e2d1 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -6846,8 +6846,8 @@ static int perf_event_set_bpf_prog(struct perf_event *event, u32 prog_fd) if (event->tp_event->prog) return -EEXIST; - if (!(event->tp_event->flags & TRACE_EVENT_FL_KPROBE)) - /* bpf programs can only be attached to kprobes */ + if (!(event->tp_event->flags & TRACE_EVENT_FL_UKPROBE)) + /* bpf programs can only be attached to u/kprobes */ return -EINVAL; prog = bpf_prog_get(prog_fd); |