This patch added support for arraymap and percpu arraymap.
Signed-off-by: Yonghong Song <yhs@xxxxxx>
---
kernel/bpf/arraymap.c | 39 +++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/kernel/bpf/arraymap.c b/kernel/bpf/arraymap.c
index 1f8453343bf2..4edd47114fe2 100644
--- a/kernel/bpf/arraymap.c
+++ b/kernel/bpf/arraymap.c
@@ -625,6 +625,41 @@ static const struct bpf_iter_seq_info iter_seq_info = {
.seq_priv_size = sizeof(struct bpf_iter_seq_array_map_info),
};
+static int bpf_for_each_array_elem(struct bpf_map *map, void *callback_fn,
+ void *callback_ctx, u64 flags)
+{
+ long ret = 0, num_calls = 0;
+ struct bpf_array *array;
+ bool is_percpu;
+ u32 i, index;
+ void *val;
+
+ if (flags != 0)
+ return -EINVAL;
+
+ is_percpu = map->map_type == BPF_MAP_TYPE_PERCPU_ARRAY;
+ array = container_of(map, struct bpf_array, map);
+ migrate_disable();
+ for (i = 0; i < map->max_entries; i++) {
+ index = i & array->index_mask;
+ if (is_percpu)
+ val = this_cpu_ptr(array->pptrs[i]);
+ else
+ val = array->value + array->elem_size * i;
+ num_calls++;
+ ret = BPF_CAST_CALL(callback_fn)((u64)(long)map,
+ (u64)(long)&index, (u64)(long)val,
+ (u64)(long)callback_ctx, 0);
+ if (ret) {
+ ret = (ret == 1) ? 0 : -EINVAL;
+ break;
+ }
+ }
+
+ migrate_enable();
+ return ret ?: num_calls;
+}
+
static int array_map_btf_id;
const struct bpf_map_ops array_map_ops = {
.map_meta_equal = array_map_meta_equal,
@@ -643,6 +678,8 @@ const struct bpf_map_ops array_map_ops = {
.map_check_btf = array_map_check_btf,
.map_lookup_batch = generic_map_lookup_batch,
.map_update_batch = generic_map_update_batch,
+ .map_set_for_each_callback_args = map_set_for_each_callback_args,
+ .map_for_each_callback = bpf_for_each_array_elem,
.map_btf_name = "bpf_array",
.map_btf_id = &array_map_btf_id,
.iter_seq_info = &iter_seq_info,
@@ -660,6 +697,8 @@ const struct bpf_map_ops percpu_array_map_ops = {
.map_delete_elem = array_map_delete_elem,
.map_seq_show_elem = percpu_array_map_seq_show_elem,
.map_check_btf = array_map_check_btf,
+ .map_set_for_each_callback_args = map_set_for_each_callback_args,
+ .map_for_each_callback = bpf_for_each_array_elem,
.map_btf_name = "bpf_array",
.map_btf_id = &percpu_array_map_btf_id,
.iter_seq_info = &iter_seq_info,
--
2.24.1
