enum bpf_map_op_type {
BPF_MAP_OP_SET_VALUE,
+ BPF_MAP_OP_SET_EVSEL,
};
enum bpf_map_key_type {
enum bpf_map_key_type key_type;
union {
u64 value;
+ struct perf_evsel *evsel;
} v;
};
return 0;
}
+static struct bpf_map_op *
+bpf_map__add_newop(struct bpf_map *map)
+{
+ struct bpf_map_op *op;
+ int err;
+
+ op = bpf_map_op__new();
+ if (IS_ERR(op))
+ return op;
+
+ err = bpf_map__add_op(map, op);
+ if (err) {
+ bpf_map_op__delete(op);
+ return ERR_PTR(err);
+ }
+ return op;
+}
+
static int
__bpf_map__config_value(struct bpf_map *map,
struct parse_events_term *term)
return -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUESIZE;
}
- op = bpf_map_op__new();
+ op = bpf_map__add_newop(map);
if (IS_ERR(op))
return PTR_ERR(op);
op->op_type = BPF_MAP_OP_SET_VALUE;
op->v.value = term->val.num;
-
- err = bpf_map__add_op(map, op);
- if (err)
- bpf_map_op__delete(op);
- return err;
+ return 0;
}
static int
}
if (term->type_val != PARSE_EVENTS__TERM_TYPE_NUM) {
- pr_debug("ERROR: wrong value type\n");
+ pr_debug("ERROR: wrong value type for 'value'\n");
return -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE;
}
return __bpf_map__config_value(map, term);
}
+static int
+__bpf_map__config_event(struct bpf_map *map,
+ struct parse_events_term *term,
+ struct perf_evlist *evlist)
+{
+ struct perf_evsel *evsel;
+ struct bpf_map_def def;
+ struct bpf_map_op *op;
+ const char *map_name;
+ int err;
+
+ map_name = bpf_map__get_name(map);
+ evsel = perf_evlist__find_evsel_by_str(evlist, term->val.str);
+ if (!evsel) {
+ pr_debug("Event (for '%s') '%s' doesn't exist\n",
+ map_name, term->val.str);
+ return -BPF_LOADER_ERRNO__OBJCONF_MAP_NOEVT;
+ }
+
+ err = bpf_map__get_def(map, &def);
+ if (err) {
+ pr_debug("Unable to get map definition from '%s'\n",
+ map_name);
+ return err;
+ }
+
+ /*
+ * No need to check key_size and value_size:
+ * kernel has already checked them.
+ */
+ 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;
+ }
+
+ op = bpf_map__add_newop(map);
+ if (IS_ERR(op))
+ return PTR_ERR(op);
+ op->op_type = BPF_MAP_OP_SET_EVSEL;
+ op->v.evsel = evsel;
+ return 0;
+}
+
+static int
+bpf_map__config_event(struct bpf_map *map,
+ struct parse_events_term *term,
+ struct perf_evlist *evlist)
+{
+ if (!term->err_val) {
+ pr_debug("Config value not set\n");
+ return -BPF_LOADER_ERRNO__OBJCONF_CONF;
+ }
+
+ if (term->type_val != PARSE_EVENTS__TERM_TYPE_STR) {
+ pr_debug("ERROR: wrong value type for 'event'\n");
+ return -BPF_LOADER_ERRNO__OBJCONF_MAP_VALUE;
+ }
+
+ return __bpf_map__config_event(map, term, evlist);
+}
+
struct bpf_obj_config__map_func {
const char *config_opt;
int (*config_func)(struct bpf_map *, struct parse_events_term *,
struct bpf_obj_config__map_func bpf_obj_config__map_funcs[] = {
{"value", bpf_map__config_value},
+ {"event", bpf_map__config_event},
};
static int
list_for_each_entry(op, &priv->ops_list, list) {
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,
return err;
}
+static int
+apply_config_evsel_for_key(const char *name, int map_fd, void *pkey,
+ struct perf_evsel *evsel)
+{
+ struct xyarray *xy = evsel->fd;
+ struct perf_event_attr *attr;
+ unsigned int key, events;
+ bool check_pass = false;
+ int *evt_fd;
+ int err;
+
+ if (!xy) {
+ pr_debug("ERROR: evsel not ready for map %s\n", name);
+ return -BPF_LOADER_ERRNO__INTERNAL;
+ }
+
+ if (xy->row_size / xy->entry_size != 1) {
+ pr_debug("ERROR: Dimension of target event is incorrect for map %s\n",
+ name);
+ return -BPF_LOADER_ERRNO__OBJCONF_MAP_EVTDIM;
+ }
+
+ attr = &evsel->attr;
+ if (attr->inherit) {
+ pr_debug("ERROR: Can't put inherit event into map %s\n", name);
+ return -BPF_LOADER_ERRNO__OBJCONF_MAP_EVTINH;
+ }
+
+ if (attr->type == PERF_TYPE_RAW)
+ check_pass = true;
+ if (attr->type == PERF_TYPE_HARDWARE)
+ check_pass = true;
+ if (attr->type == PERF_TYPE_SOFTWARE &&
+ attr->config == PERF_COUNT_SW_BPF_OUTPUT)
+ check_pass = true;
+ if (!check_pass) {
+ pr_debug("ERROR: Event type is wrong for map %s\n", name);
+ return -BPF_LOADER_ERRNO__OBJCONF_MAP_EVTTYPE;
+ }
+
+ events = xy->entries / (xy->row_size / xy->entry_size);
+ key = *((unsigned int *)pkey);
+ if (key >= events) {
+ pr_debug("ERROR: there is no event %d for map %s\n",
+ key, name);
+ return -BPF_LOADER_ERRNO__OBJCONF_MAP_MAPSIZE;
+ }
+ evt_fd = xyarray__entry(xy, key, 0);
+ err = bpf_map_update_elem(map_fd, pkey, evt_fd, BPF_ANY);
+ if (err && errno)
+ err = -errno;
+ return err;
+}
+
static int
apply_obj_config_map_for_key(const char *name, int map_fd,
struct bpf_map_def *pdef __maybe_unused,
pdef->value_size,
op->v.value);
break;
+ case BPF_MAP_OP_SET_EVSEL:
+ err = apply_config_evsel_for_key(name, map_fd, pkey,
+ op->v.evsel);
+ break;
default:
pr_debug("ERROR: unknown value type for '%s'\n", name);
err = -BPF_LOADER_ERRNO__INTERNAL;
[ERRCODE_OFFSET(OBJCONF_MAP_TYPE)] = "Incorrect map type",
[ERRCODE_OFFSET(OBJCONF_MAP_KEYSIZE)] = "Incorrect map key size",
[ERRCODE_OFFSET(OBJCONF_MAP_VALUESIZE)] = "Incorrect map value size",
+ [ERRCODE_OFFSET(OBJCONF_MAP_NOEVT)] = "Event not found for map setting",
+ [ERRCODE_OFFSET(OBJCONF_MAP_MAPSIZE)] = "Invalid map size for event setting",
+ [ERRCODE_OFFSET(OBJCONF_MAP_EVTDIM)] = "Event dimension too large",
+ [ERRCODE_OFFSET(OBJCONF_MAP_EVTINH)] = "Doesn't support inherit event",
+ [ERRCODE_OFFSET(OBJCONF_MAP_EVTTYPE)] = "Wrong event type for map",
};
static int
int bpf__strerror_apply_obj_config(int err, char *buf, size_t size)
{
bpf__strerror_head(err, buf, size);
+ bpf__strerror_entry(BPF_LOADER_ERRNO__OBJCONF_MAP_EVTDIM,
+ "Cannot set event to BPF map in multi-thread tracing");
+ bpf__strerror_entry(BPF_LOADER_ERRNO__OBJCONF_MAP_EVTINH,
+ "%s (Hint: use -i to turn off inherit)", emsg);
+ bpf__strerror_entry(BPF_LOADER_ERRNO__OBJCONF_MAP_EVTTYPE,
+ "Can only put raw, hardware and BPF output event into a BPF map");
bpf__strerror_end(buf, size);
return 0;
}
projects / users / hch / configfs.git / commitdiff