static void *perf_event_fd_array_get_ptr(struct bpf_map *map, int fd)
{
struct perf_event *event;
const struct perf_event_attr *attr;
event = perf_event_get(fd);
if (IS_ERR(event))
return event;
attr = perf_event_attrs(event);
if (IS_ERR(attr))
goto err;
if (attr->inherit)
goto err;
if (attr->type == PERF_TYPE_RAW)
return event;
if (attr->type == PERF_TYPE_HARDWARE)
return event;
if (attr->type == PERF_TYPE_SOFTWARE &&
attr->config == PERF_COUNT_SW_BPF_OUTPUT)
return event;
err:
perf_event_release_kernel(event);
return ERR_PTR(-EINVAL);
}
static void *perf_event_fd_array_get_ptr(struct bpf_map *map,
struct file *map_file, int fd)
{
struct bpf_event_entry *ee;
struct perf_event *event;
struct file *perf_file;
u64 value;
perf_file = perf_event_get(fd);
if (IS_ERR(perf_file))
return perf_file;
ee = ERR_PTR(-EOPNOTSUPP);
event = perf_file->private_data;
if (perf_event_read_local(event, &value) == -EOPNOTSUPP)
goto err_out;
ee = bpf_event_entry_gen(perf_file, map_file);
if (ee)
return ee;
ee = ERR_PTR(-ENOMEM);
err_out:
fput(perf_file);
return ee;
}
static void *perf_event_fd_array_get_ptr(struct bpf_map *map, int fd)
{
struct perf_event *event;
const struct perf_event_attr *attr;
event = perf_event_get(fd);
if (IS_ERR(event))
return event;
attr = perf_event_attrs(event);
if (IS_ERR(attr))
return (void *)attr;
if (attr->type != PERF_TYPE_RAW &&
attr->type != PERF_TYPE_HARDWARE) {
perf_event_release_kernel(event);
return ERR_PTR(-EINVAL);
}
return event;
}
static void *perf_event_fd_array_get_ptr(struct bpf_map *map,
struct file *map_file, int fd)
{
const struct perf_event_attr *attr;
struct bpf_event_entry *ee;
struct perf_event *event;
struct file *perf_file;
perf_file = perf_event_get(fd);
if (IS_ERR(perf_file))
return perf_file;
event = perf_file->private_data;
ee = ERR_PTR(-EINVAL);
attr = perf_event_attrs(event);
if (IS_ERR(attr) || attr->inherit)
goto err_out;
switch (attr->type) {
case PERF_TYPE_SOFTWARE:
if (attr->config != PERF_COUNT_SW_BPF_OUTPUT)
goto err_out;
/* fall-through */
case PERF_TYPE_RAW:
case PERF_TYPE_HARDWARE:
ee = bpf_event_entry_gen(perf_file, map_file);
if (ee)
return ee;
ee = ERR_PTR(-ENOMEM);
/* fall-through */
default:
break;
}
err_out:
fput(perf_file);
return ee;
}
