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| author |   Yonghong Song <yhs@fb.com> | 2017-12-11 11:39:03 -0800 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2017-12-12 08:46:40 -0800 |
| commit | d279f1f8c64711ca986c3121c8ec811b892932f0 (patch) | |
| tree | e7cc1c25702aec28b2fb89842e4ccef512d9582f /tools/include | |
| parent | bpf/tracing: allow user space to query prog array on the same tp (diff) | |
| download | linux-dev-d279f1f8c64711ca986c3121c8ec811b892932f0.tar.xz linux-dev-d279f1f8c64711ca986c3121c8ec811b892932f0.zip | |
bpf/tracing: add a bpf test for new ioctl query interface
Added a subtest in test_progs. The tracepoint is
sched/sched_switch. Multiple bpf programs are attached to
this tracepoint and the query interface is exercised.
Signed-off-by: Yonghong Song <yhs@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/include')
| -rw-r--r-- | tools/include/uapi/linux/perf_event.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h index 362493a2f950..f2c354d5f519 100644 --- a/tools/include/uapi/linux/perf_event.h +++ b/tools/include/uapi/linux/perf_event.h @@ -418,6 +418,27 @@ struct perf_event_attr { __u16 __reserved_2; /* align to __u64 */ }; +/* + * Structure used by below PERF_EVENT_IOC_QUERY_BPF command + * to query bpf programs attached to the same perf tracepoint + * as the given perf event. + */ +struct perf_event_query_bpf { + /* + * The below ids array length + */ + __u32 ids_len; + /* + * Set by the kernel to indicate the number of + * available programs + */ + __u32 prog_cnt; + /* + * User provided buffer to store program ids + */ + __u32 ids[0]; +}; + #define perf_flags(attr) (*(&(attr)->read_format + 1)) /* @@ -433,6 +454,7 @@ struct perf_event_attr { #define PERF_EVENT_IOC_ID _IOR('$', 7, __u64 *) #define PERF_EVENT_IOC_SET_BPF _IOW('$', 8, __u32) #define PERF_EVENT_IOC_PAUSE_OUTPUT _IOW('$', 9, __u32) +#define PERF_EVENT_IOC_QUERY_BPF _IOWR('$', 10, struct perf_event_query_bpf *) enum perf_event_ioc_flags { PERF_IOC_FLAG_GROUP = 1U << 0, |