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tools lib bpf: Make bpf_program__get_private() use IS_ERR()

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For consistency with bpf_map__priv() and elsewhere.

Acked-by: Wang Nan <wangnan0@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/n/tip-x17nk5mrazkf45z0l0ahlmo8@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2016-06-03 12:36:39 -03:00
parent a7fe0450b0
commit be834ffbd1
3 changed files with 15 additions and 20 deletions
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5
tools/lib/bpf/libbpf.c
View File

@ -1230,10 +1230,9 @@ int bpf_program__set_private(struct bpf_program *prog,
return 0;
}
int bpf_program__get_private(struct bpf_program *prog, void **ppriv)
void *bpf_program__priv(struct bpf_program *prog)
{
*ppriv = prog->priv;
return 0;
return prog ? prog->priv : ERR_PTR(-EINVAL);
}
const char *bpf_program__title(struct bpf_program *prog, bool needs_copy)

3
tools/lib/bpf/libbpf.h
View File

@ -81,8 +81,7 @@ typedef void (*bpf_program_clear_priv_t)(struct bpf_program *,
int bpf_program__set_private(struct bpf_program *prog, void *priv,
bpf_program_clear_priv_t clear_priv);
int bpf_program__get_private(struct bpf_program *prog,
void **ppriv);
void *bpf_program__priv(struct bpf_program *prog);
const char *bpf_program__title(struct bpf_program *prog, bool needs_copy);

27
tools/perf/util/bpf-loader.c
View File

@ -380,15 +380,14 @@ preproc_gen_prologue(struct bpf_program *prog, int n,
struct bpf_insn *orig_insns, int orig_insns_cnt,
struct bpf_prog_prep_result *res)
{
struct bpf_prog_priv *priv = bpf_program__priv(prog);
struct probe_trace_event *tev;
struct perf_probe_event *pev;
struct bpf_prog_priv *priv;
struct bpf_insn *buf;
size_t prologue_cnt = 0;
int i, err;
err = bpf_program__get_private(prog, (void **)&priv);
if (err || !priv)
if (IS_ERR(priv) || !priv)
goto errout;
pev = &priv->pev;
@ -535,13 +534,12 @@ static int map_prologue(struct perf_probe_event *pev, int *mapping,
static int hook_load_preprocessor(struct bpf_program *prog)
{
struct bpf_prog_priv *priv = bpf_program__priv(prog);
struct perf_probe_event *pev;
struct bpf_prog_priv *priv;
bool need_prologue = false;
int err, i;
err = bpf_program__get_private(prog, (void **)&priv);
if (err || !priv) {
if (IS_ERR(priv) || !priv) {
pr_debug("Internal error when hook preprocessor\n");
return -BPF_LOADER_ERRNO__INTERNAL;
}
@ -607,9 +605,11 @@ int bpf__probe(struct bpf_object *obj)
if (err)
goto out;
err = bpf_program__get_private(prog, (void **)&priv);
if (err || !priv)
priv = bpf_program__priv(prog);
if (IS_ERR(priv) || !priv) {
err = PTR_ERR(priv);
goto out;
}
pev = &priv->pev;
err = convert_perf_probe_events(pev, 1);
@ -645,13 +645,12 @@ int bpf__unprobe(struct bpf_object *obj)
{
int err, ret = 0;
struct bpf_program *prog;
struct bpf_prog_priv *priv;
bpf_object__for_each_program(prog, obj) {
struct bpf_prog_priv *priv = bpf_program__priv(prog);
int i;
err = bpf_program__get_private(prog, (void **)&priv);
if (err || !priv)
if (IS_ERR(priv) || !priv)
continue;
for (i = 0; i < priv->pev.ntevs; i++) {
@ -702,14 +701,12 @@ int bpf__foreach_tev(struct bpf_object *obj,
int err;
bpf_object__for_each_program(prog, obj) {
struct bpf_prog_priv *priv = bpf_program__priv(prog);
struct probe_trace_event *tev;
struct perf_probe_event *pev;
struct bpf_prog_priv *priv;
int i, fd;
err = bpf_program__get_private(prog,
(void **)&priv);
if (err || !priv) {
if (IS_ERR(priv) || !priv) {
pr_debug("bpf: failed to get private field\n");
return -BPF_LOADER_ERRNO__INTERNAL;
}