diff options
| -rw-r--r-- | kernel/bpf/verifier.c | 3 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.c | 13 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.h | 4 | ||||
| -rw-r--r-- | tools/perf/util/bpf-filter.c | 5 |
4 files changed, 18 insertions, 7 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 0806295945e4..c4f69a9e9af6 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -23114,6 +23114,8 @@ static void free_states(struct bpf_verifier_env *env) for (i = 0; i < env->scc_cnt; ++i) { info = env->scc_info[i]; + if (!info) + continue; for (j = 0; j < info->num_visits; j++) free_backedges(&info->visits[j]); kvfree(info); @@ -24554,6 +24556,7 @@ dfs_continue: err = -ENOMEM; goto exit; } + env->scc_cnt = next_scc_id; exit: kvfree(stack); kvfree(pre); diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index fb4d92c5c339..8f5a81b672e1 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -10965,11 +10965,14 @@ struct bpf_link *bpf_program__attach_perf_event_opts(const struct bpf_program *p } link->link.fd = pfd; } - if (ioctl(pfd, PERF_EVENT_IOC_ENABLE, 0) < 0) { - err = -errno; - pr_warn("prog '%s': failed to enable perf_event FD %d: %s\n", - prog->name, pfd, errstr(err)); - goto err_out; + + if (!OPTS_GET(opts, dont_enable, false)) { + if (ioctl(pfd, PERF_EVENT_IOC_ENABLE, 0) < 0) { + err = -errno; + pr_warn("prog '%s': failed to enable perf_event FD %d: %s\n", + prog->name, pfd, errstr(err)); + goto err_out; + } } return &link->link; diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index d1cf813a057b..455a957cb702 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -499,9 +499,11 @@ struct bpf_perf_event_opts { __u64 bpf_cookie; /* don't use BPF link when attach BPF program */ bool force_ioctl_attach; + /* don't automatically enable the event */ + bool dont_enable; size_t :0; }; -#define bpf_perf_event_opts__last_field force_ioctl_attach +#define bpf_perf_event_opts__last_field dont_enable LIBBPF_API struct bpf_link * bpf_program__attach_perf_event(const struct bpf_program *prog, int pfd); diff --git a/tools/perf/util/bpf-filter.c b/tools/perf/util/bpf-filter.c index d0e013eeb0f7..a0b11f35395f 100644 --- a/tools/perf/util/bpf-filter.c +++ b/tools/perf/util/bpf-filter.c @@ -451,6 +451,8 @@ int perf_bpf_filter__prepare(struct evsel *evsel, struct target *target) struct bpf_link *link; struct perf_bpf_filter_entry *entry; bool needs_idx_hash = !target__has_cpu(target); + DECLARE_LIBBPF_OPTS(bpf_perf_event_opts, pe_opts, + .dont_enable = true); entry = calloc(MAX_FILTERS, sizeof(*entry)); if (entry == NULL) @@ -522,7 +524,8 @@ int perf_bpf_filter__prepare(struct evsel *evsel, struct target *target) prog = skel->progs.perf_sample_filter; for (x = 0; x < xyarray__max_x(evsel->core.fd); x++) { for (y = 0; y < xyarray__max_y(evsel->core.fd); y++) { - link = bpf_program__attach_perf_event(prog, FD(evsel, x, y)); + link = bpf_program__attach_perf_event_opts(prog, FD(evsel, x, y), + &pe_opts); if (IS_ERR(link)) { pr_err("Failed to attach perf sample-filter program\n"); ret = PTR_ERR(link); |