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perf bpf: Generalize bpf__setup_stdout()
We will use it to set up other bpf-output events, for instance to generate augmented syscall entry tracepoints with pointer contents. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-4r7kw0nsyi4vyz6xm1tzx6a3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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5941d856a9
commit
92bbe8d834
2 changed files with 24 additions and 9 deletions
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@ -1535,10 +1535,7 @@ int bpf__apply_obj_config(void)
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(strcmp(name, \
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bpf_map__name(pos)) == 0))
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#define bpf__for_each_stdout_map(pos, obj, objtmp) \
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bpf__for_each_map_named(pos, obj, objtmp, "__bpf_stdout__")
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int bpf__setup_stdout(struct perf_evlist *evlist)
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int bpf__setup_output_event(struct perf_evlist *evlist, const char *name)
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{
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struct bpf_map_priv *tmpl_priv = NULL;
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struct bpf_object *obj, *tmp;
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@ -1547,7 +1544,7 @@ int bpf__setup_stdout(struct perf_evlist *evlist)
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int err;
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bool need_init = false;
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bpf__for_each_stdout_map(map, obj, tmp) {
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bpf__for_each_map_named(map, obj, tmp, name) {
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struct bpf_map_priv *priv = bpf_map__priv(map);
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if (IS_ERR(priv))
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@ -1567,17 +1564,23 @@ int bpf__setup_stdout(struct perf_evlist *evlist)
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return 0;
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if (!tmpl_priv) {
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err = parse_events(evlist, "bpf-output/no-inherit=1,name=__bpf_stdout__/",
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NULL);
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char *event_definition = NULL;
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if (asprintf(&event_definition, "bpf-output/no-inherit=1,name=%s/", name) < 0)
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return -ENOMEM;
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err = parse_events(evlist, event_definition, NULL);
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free(event_definition);
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if (err) {
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pr_debug("ERROR: failed to create bpf-output event\n");
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pr_debug("ERROR: failed to create the \"%s\" bpf-output event\n", name);
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return -err;
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}
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evsel = perf_evlist__last(evlist);
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}
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bpf__for_each_stdout_map(map, obj, tmp) {
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bpf__for_each_map_named(map, obj, tmp, name) {
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struct bpf_map_priv *priv = bpf_map__priv(map);
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if (IS_ERR(priv))
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@ -1609,6 +1612,11 @@ int bpf__setup_stdout(struct perf_evlist *evlist)
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return 0;
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}
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int bpf__setup_stdout(struct perf_evlist *evlist)
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{
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return bpf__setup_output_event(evlist, "__bpf_stdout__");
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}
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#define ERRNO_OFFSET(e) ((e) - __BPF_LOADER_ERRNO__START)
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#define ERRCODE_OFFSET(c) ERRNO_OFFSET(BPF_LOADER_ERRNO__##c)
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#define NR_ERRNO (__BPF_LOADER_ERRNO__END - __BPF_LOADER_ERRNO__START)
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@ -82,6 +82,7 @@ int bpf__apply_obj_config(void);
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int bpf__strerror_apply_obj_config(int err, char *buf, size_t size);
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int bpf__setup_stdout(struct perf_evlist *evlist);
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int bpf__setup_output_event(struct perf_evlist *evlist, const char *name);
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int bpf__strerror_setup_stdout(struct perf_evlist *evlist, int err,
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char *buf, size_t size);
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@ -138,6 +139,12 @@ bpf__setup_stdout(struct perf_evlist *evlist __maybe_unused)
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return 0;
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}
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static inline int
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bpf__setup_output_event(struct perf_evlist *evlist __maybe_unused, const char *name __maybe_unused)
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{
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return 0;
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}
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static inline int
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__bpf_strerror(char *buf, size_t size)
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{
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