From: Joe Burton <jevburton.kernel@gmail.com> To: Alexei Starovoitov <ast@kernel.org>, Daniel Borkmann <daniel@iogearbox.net>, Andrii Nakryiko <andrii@kernel.org>, Martin KaFai Lau <kafai@fb.com> Cc: Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>, John Fastabend <john.fastabend@gmail.com>, KP Singh <kpsingh@kernel.org>, Petar Penkov <ppenkov@google.com>, Stanislav Fomichev <sdf@google.com>, Hao Luo <haoluo@google.com>, netdev@vger.kernel.org, bpf@vger.kernel.org, Joe Burton <jevburton@google.com> Subject: [RFC PATCH v2 07/13] bpf: Register BPF_MAP_TRACE_{UPDATE,DELETE}_ELEM hooks Date: Wed, 29 Sep 2021 23:59:04 +0000 [thread overview] Message-ID: <20210929235910.1765396-8-jevburton.kernel@gmail.com> (raw) In-Reply-To: <20210929235910.1765396-1-jevburton.kernel@gmail.com> From: Joe Burton <jevburton@google.com> Tracing programs may now load with this hook. There is not yet a way to invoke those programs. Signed-off-by: Joe Burton <jevburton@google.com> --- kernel/bpf/map_trace.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/kernel/bpf/map_trace.c b/kernel/bpf/map_trace.c index 77a55f8cd119..d7c52e197482 100644 --- a/kernel/bpf/map_trace.c +++ b/kernel/bpf/map_trace.c @@ -335,3 +335,26 @@ void bpf_trace_map_delete_elem(struct bpf_map *map, bpf_map_trace_run_progs(map, BPF_MAP_TRACE_DELETE_ELEM, &ctx); } +DEFINE_BPF_MAP_TRACE_FUNC(BPF_MAP_TRACE_UPDATE_ELEM, void *key, void *value, u64 flags); +DEFINE_BPF_MAP_TRACE_FUNC(BPF_MAP_TRACE_DELETE_ELEM, void *key); + +static struct bpf_map_trace_reg map_trace_update_elem_reg_info = { + .target = BPF_MAP_TRACE_FUNC(BPF_MAP_TRACE_UPDATE_ELEM), + .trace_type = BPF_MAP_TRACE_UPDATE_ELEM, +}; +static struct bpf_map_trace_reg map_trace_delete_elem_reg_info = { + .target = BPF_MAP_TRACE_FUNC(BPF_MAP_TRACE_DELETE_ELEM), + .trace_type = BPF_MAP_TRACE_DELETE_ELEM, +}; + +static int __init bpf_map_trace_init(void) +{ + int err = bpf_map_trace_reg_target(&map_trace_update_elem_reg_info); + + err = (err ? err : + bpf_map_trace_reg_target(&map_trace_delete_elem_reg_info)); + return err; +} + +late_initcall(bpf_map_trace_init); + -- 2.33.0.685.g46640cef36-goog
next prev parent reply other threads:[~2021-09-29 23:59 UTC|newest] Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-09-29 23:58 [RFC PATCH v2 00/13] Introduce BPF map tracing capability Joe Burton 2021-09-29 23:58 ` [RFC PATCH v2 01/13] bpf: Add machinery to register map tracing hooks Joe Burton 2021-09-29 23:58 ` [RFC PATCH v2 02/13] bpf: Allow loading BPF_TRACE_MAP programs Joe Burton 2021-09-29 23:59 ` [RFC PATCH v2 03/13] bpf: Add list of tracing programs to struct bpf_map Joe Burton 2021-09-29 23:59 ` [RFC PATCH v2 04/13] bpf: Define a few bpf_link_ops for BPF_TRACE_MAP Joe Burton 2021-09-30 0:26 ` Eric Dumazet 2021-09-30 1:09 ` Joe Burton 2021-09-29 23:59 ` [RFC PATCH v2 05/13] bpf: Enable creation of BPF_LINK_TYPE_MAP_TRACE Joe Burton 2021-09-29 23:59 ` [RFC PATCH v2 06/13] bpf: Add APIs to invoke tracing programs Joe Burton 2021-09-29 23:59 ` Joe Burton [this message] 2021-09-29 23:59 ` [RFC PATCH v2 08/13] libbpf: Support BPF_TRACE_MAP Joe Burton 2021-09-29 23:59 ` [RFC PATCH v2 09/13] bpf: Add infinite loop check on map tracers Joe Burton 2021-09-29 23:59 ` [RFC PATCH v2 10/13] Add bpf_map_trace_{update,delete}_elem() helper functions Joe Burton 2021-09-29 23:59 ` [RFC PATCH v2 11/13] bpf: verifier inserts map tracing helper call Joe Burton 2021-09-29 23:59 ` [RFC PATCH v2 12/13] bpf: Add selftests for map tracing Joe Burton 2021-09-29 23:59 ` [RFC PATCH v2 13/13] bpf: Add real world example " Joe Burton 2021-10-05 5:13 ` [RFC PATCH v2 00/13] Introduce BPF map tracing capability Alexei Starovoitov 2021-10-05 21:47 ` Joe Burton 2021-10-06 16:41 ` Alexei Starovoitov 2021-10-06 21:05 ` Joe Burton 2021-10-18 23:15 ` Alexei Starovoitov
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