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tools lib bpf: Use IS_ERR() reporting macros with bpf_map__get_def() 

And for consistency, rename it to bpf_map__def(), leaving "get" for
reference counting.

Also make it return a const pointer, as suggested by Wang.

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-mer00xqkiho0ymg66b5i9luw@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2016-06-02 14:21:06 -03:00
parent 009ad5d594
commit 53897a78ca
3 changed files with 27 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
tools/lib/bpf/libbpf.c
View File

@ -1319,13 +1319,9 @@ int bpf_map__get_fd(struct bpf_map *map)
return map->fd;
}
int bpf_map__get_def(struct bpf_map *map, struct bpf_map_def *pdef)
const struct bpf_map_def *bpf_map__def(struct bpf_map *map)
{
if (!map || !pdef)
return -EINVAL;
*pdef = map->def;
return 0;
return map ? &map->def : ERR_PTR(-EINVAL);
}
const char *bpf_map__name(struct bpf_map *map)

2
tools/lib/bpf/libbpf.h
View File

@ -181,7 +181,7 @@ bpf_map__next(struct bpf_map *map, struct bpf_object *obj);
(pos) = bpf_map__next((pos), (obj)))
int bpf_map__get_fd(struct bpf_map *map);
int bpf_map__get_def(struct bpf_map *map, struct bpf_map_def *pdef);
const struct bpf_map_def *bpf_map__def(struct bpf_map *map);
const char *bpf_map__name(struct bpf_map *map);
typedef void (*bpf_map_clear_priv_t)(struct bpf_map *, void *);

52
tools/perf/util/bpf-loader.c
View File

@ -945,28 +945,26 @@ static int
__bpf_map__config_value(struct bpf_map *map,
struct parse_events_term *term)
{
struct bpf_map_def def;
struct bpf_map_op *op;
const char *map_name = bpf_map__name(map);
int err;
const struct bpf_map_def *def = bpf_map__def(map);
err = bpf_map__get_def(map, &def);
if (err) {
if (IS_ERR(def)) {
pr_debug("Unable to get map definition from '%s'\n",
map_name);
return -BPF_LOADER_ERRNO__INTERNAL;
}
if (def.type != BPF_MAP_TYPE_ARRAY) {
if (def->type != BPF_MAP_TYPE_ARRAY) {
pr_debug("Map %s type is not BPF_MAP_TYPE_ARRAY\n",
map_name);
return -BPF_LOADER_ERRNO__OBJCONF_MAP_TYPE;
}
if (def.key_size < sizeof(unsigned int)) {
if (def->key_size < sizeof(unsigned int)) {
pr_debug("Map %s has incorrect key size\n", map_name);
return -BPF_LOADER_ERRNO__OBJCONF_MAP_KEYSIZE;
}
switch (def.value_size) {
switch (def->value_size) {
case 1:
case 2:
case 4:
@ -1009,10 +1007,9 @@ __bpf_map__config_event(struct bpf_map *map,
struct perf_evlist *evlist)
{
struct perf_evsel *evsel;
struct bpf_map_def def;
const struct bpf_map_def *def;
struct bpf_map_op *op;
const char *map_name = bpf_map__name(map);
int err;
evsel = perf_evlist__find_evsel_by_str(evlist, term->val.str);
if (!evsel) {
@ -1021,18 +1018,18 @@ __bpf_map__config_event(struct bpf_map *map,
return -BPF_LOADER_ERRNO__OBJCONF_MAP_NOEVT;
}
err = bpf_map__get_def(map, &def);
if (err) {
def = bpf_map__def(map);
if (IS_ERR(def)) {
pr_debug("Unable to get map definition from '%s'\n",
map_name);
return err;
return PTR_ERR(def);
}
/*
* No need to check key_size and value_size:
* kernel has already checked them.
*/
if (def.type != BPF_MAP_TYPE_PERF_EVENT_ARRAY) {
if (def->type != BPF_MAP_TYPE_PERF_EVENT_ARRAY) {
pr_debug("Map %s type is not BPF_MAP_TYPE_PERF_EVENT_ARRAY\n",
map_name);
return -BPF_LOADER_ERRNO__OBJCONF_MAP_TYPE;
@ -1081,9 +1078,8 @@ config_map_indices_range_check(struct parse_events_term *term,
const char *map_name)
{
struct parse_events_array *array = &term->array;
struct bpf_map_def def;
const struct bpf_map_def *def;
unsigned int i;
int err;
if (!array->nr_ranges)
return 0;
@ -1093,8 +1089,8 @@ config_map_indices_range_check(struct parse_events_term *term,
return -BPF_LOADER_ERRNO__INTERNAL;
}
err = bpf_map__get_def(map, &def);
if (err) {
def = bpf_map__def(map);
if (IS_ERR(def)) {
pr_debug("ERROR: Unable to get map definition from '%s'\n",
map_name);
return -BPF_LOADER_ERRNO__INTERNAL;
@ -1105,7 +1101,7 @@ config_map_indices_range_check(struct parse_events_term *term,
size_t length = array->ranges[i].length;
unsigned int idx = start + length - 1;
if (idx >= def.max_entries) {
if (idx >= def->max_entries) {
pr_debug("ERROR: index %d too large\n", idx);
return -BPF_LOADER_ERRNO__OBJCONF_MAP_IDX2BIG;
}
@ -1198,14 +1194,14 @@ out:
}
typedef int (*map_config_func_t)(const char *name, int map_fd,
struct bpf_map_def *pdef,
const struct bpf_map_def *pdef,
struct bpf_map_op *op,
void *pkey, void *arg);
static int
foreach_key_array_all(map_config_func_t func,
void *arg, const char *name,
int map_fd, struct bpf_map_def *pdef,
int map_fd, const struct bpf_map_def *pdef,
struct bpf_map_op *op)
{
unsigned int i;
@ -1225,7 +1221,7 @@ foreach_key_array_all(map_config_func_t func,
static int
foreach_key_array_ranges(map_config_func_t func, void *arg,
const char *name, int map_fd,
struct bpf_map_def *pdef,
const struct bpf_map_def *pdef,
struct bpf_map_op *op)
{
unsigned int i, j;
@ -1256,7 +1252,7 @@ bpf_map_config_foreach_key(struct bpf_map *map,
{
int err, map_fd;
struct bpf_map_op *op;
struct bpf_map_def def;
const struct bpf_map_def *def;
const char *name = bpf_map__name(map);
struct bpf_map_priv *priv = bpf_map__priv(map);
@ -1269,8 +1265,8 @@ bpf_map_config_foreach_key(struct bpf_map *map,
return 0;
}
err = bpf_map__get_def(map, &def);
if (err) {
def = bpf_map__def(map);
if (IS_ERR(def)) {
pr_debug("ERROR: failed to get definition from map %s\n", name);
return -BPF_LOADER_ERRNO__INTERNAL;
}
@ -1281,17 +1277,17 @@ bpf_map_config_foreach_key(struct bpf_map *map,
}
list_for_each_entry(op, &priv->ops_list, list) {
switch (def.type) {
switch (def->type) {
case BPF_MAP_TYPE_ARRAY:
case BPF_MAP_TYPE_PERF_EVENT_ARRAY:
switch (op->key_type) {
case BPF_MAP_KEY_ALL:
err = foreach_key_array_all(func, arg, name,
map_fd, &def, op);
map_fd, def, op);
break;
case BPF_MAP_KEY_RANGES:
err = foreach_key_array_ranges(func, arg, name,
map_fd, &def,
map_fd, def,
op);
break;
default:
@ -1401,7 +1397,7 @@ apply_config_evsel_for_key(const char *name, int map_fd, void *pkey,
static int
apply_obj_config_map_for_key(const char *name, int map_fd,
struct bpf_map_def *pdef __maybe_unused,
const struct bpf_map_def *pdef,
struct bpf_map_op *op,
void *pkey, void *arg __maybe_unused)
{