From cd102d70fe957b060b9df6bc4f54684de3fe00cd Mon Sep 17 00:00:00 2001 From: Wang Nan Date: Wed, 13 Jul 2016 10:44:04 +0000 Subject: [PATCH] perf bpf: Rename bpf__foreach_tev() to bpf__foreach_event() Following commit will allow BPF script attach to tracepoints. bpf__foreach_tev() will iterate over all events, not only kprobes. Rename it to bpf__foreach_event(). Since only group and event are used by caller, there's no need to pass full 'struct probe_trace_event' to bpf_prog_iter_callback_t. Pass only these two strings. After this patch bpf_prog_iter_callback_t natually support tracepoints. Signed-off-by: Wang Nan Cc: Alexei Starovoitov Cc: Jiri Olsa Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1468406646-21642-5-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/bpf-loader.c | 8 ++++---- tools/perf/util/bpf-loader.h | 12 ++++++------ tools/perf/util/parse-events.c | 16 ++++++++-------- 3 files changed, 18 insertions(+), 18 deletions(-) diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c index 8445e89621fe..f22701497112 100644 --- a/tools/perf/util/bpf-loader.c +++ b/tools/perf/util/bpf-loader.c @@ -693,9 +693,9 @@ int bpf__load(struct bpf_object *obj) return 0; } -int bpf__foreach_tev(struct bpf_object *obj, - bpf_prog_iter_callback_t func, - void *arg) +int bpf__foreach_event(struct bpf_object *obj, + bpf_prog_iter_callback_t func, + void *arg) { struct bpf_program *prog; int err; @@ -728,7 +728,7 @@ int bpf__foreach_tev(struct bpf_object *obj, return fd; } - err = (*func)(tev, fd, arg); + err = (*func)(tev->group, tev->event, fd, arg); if (err) { pr_debug("bpf: call back failed, stop iterate\n"); return err; diff --git a/tools/perf/util/bpf-loader.h b/tools/perf/util/bpf-loader.h index 941e17275aa7..f2b737b225f2 100644 --- a/tools/perf/util/bpf-loader.h +++ b/tools/perf/util/bpf-loader.h @@ -46,7 +46,7 @@ struct bpf_object; struct parse_events_term; #define PERF_BPF_PROBE_GROUP "perf_bpf_probe" -typedef int (*bpf_prog_iter_callback_t)(struct probe_trace_event *tev, +typedef int (*bpf_prog_iter_callback_t)(const char *group, const char *event, int fd, void *arg); #ifdef HAVE_LIBBPF_SUPPORT @@ -67,8 +67,8 @@ int bpf__strerror_probe(struct bpf_object *obj, int err, int bpf__load(struct bpf_object *obj); int bpf__strerror_load(struct bpf_object *obj, int err, char *buf, size_t size); -int bpf__foreach_tev(struct bpf_object *obj, - bpf_prog_iter_callback_t func, void *arg); +int bpf__foreach_event(struct bpf_object *obj, + bpf_prog_iter_callback_t func, void *arg); int bpf__config_obj(struct bpf_object *obj, struct parse_events_term *term, struct perf_evlist *evlist, int *error_pos); @@ -107,9 +107,9 @@ static inline int bpf__unprobe(struct bpf_object *obj __maybe_unused) { return 0 static inline int bpf__load(struct bpf_object *obj __maybe_unused) { return 0; } static inline int -bpf__foreach_tev(struct bpf_object *obj __maybe_unused, - bpf_prog_iter_callback_t func __maybe_unused, - void *arg __maybe_unused) +bpf__foreach_event(struct bpf_object *obj __maybe_unused, + bpf_prog_iter_callback_t func __maybe_unused, + void *arg __maybe_unused) { return 0; } diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index d866824f2b42..6b4fff375d99 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -584,7 +584,7 @@ struct __add_bpf_event_param { struct list_head *head_config; }; -static int add_bpf_event(struct probe_trace_event *tev, int fd, +static int add_bpf_event(const char *group, const char *event, int fd, void *_param) { LIST_HEAD(new_evsels); @@ -595,27 +595,27 @@ static int add_bpf_event(struct probe_trace_event *tev, int fd, int err; pr_debug("add bpf event %s:%s and attach bpf program %d\n", - tev->group, tev->event, fd); + group, event, fd); - err = parse_events_add_tracepoint(&new_evsels, &evlist->idx, tev->group, - tev->event, evlist->error, + err = parse_events_add_tracepoint(&new_evsels, &evlist->idx, group, + event, evlist->error, param->head_config); if (err) { struct perf_evsel *evsel, *tmp; pr_debug("Failed to add BPF event %s:%s\n", - tev->group, tev->event); + group, event); list_for_each_entry_safe(evsel, tmp, &new_evsels, node) { list_del(&evsel->node); perf_evsel__delete(evsel); } return err; } - pr_debug("adding %s:%s\n", tev->group, tev->event); + pr_debug("adding %s:%s\n", group, event); list_for_each_entry(pos, &new_evsels, node) { pr_debug("adding %s:%s to %p\n", - tev->group, tev->event, pos); + group, event, pos); pos->bpf_fd = fd; } list_splice(&new_evsels, list); @@ -661,7 +661,7 @@ int parse_events_load_bpf_obj(struct parse_events_evlist *data, goto errout; } - err = bpf__foreach_tev(obj, add_bpf_event, ¶m); + err = bpf__foreach_event(obj, add_bpf_event, ¶m); if (err) { snprintf(errbuf, sizeof(errbuf), "Attach events in BPF object failed");