Subject: [PATCH bpf-next v9 30/34] bpf: eliminate rlimit-based memory accounting for xskmap maps

From: Roman Gushchin <[email-masked]>
Date: Tue, 1 Dec 2020 13:58:56 -0800

Do not use rlimit-based memory accounting for xskmap maps.
It has been replaced with the memcg-based memory accounting.

Signed-off-by: Roman Gushchin <[email-masked]>
Acked-by: Song Liu <[email-masked]>
---
 net/xdp/xskmap.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/net/xdp/xskmap.c b/net/xdp/xskmap.c
index 9fff1e6dc9cd..113fd9017203 100644
--- a/net/xdp/xskmap.c
+++ b/net/xdp/xskmap.c
@@ -58,9 +58,8 @@ static void xsk_map_sock_delete(struct xdp_sock *xs,
 
 static struct bpf_map *xsk_map_alloc(union bpf_attr *attr)
 {
-	struct bpf_map_memory mem;
-	int err, numa_node;
 	struct xsk_map *m;
+	int numa_node;
 	u64 size;
 
 	if (!capable(CAP_NET_ADMIN))
@@ -74,18 +73,11 @@ static struct bpf_map *xsk_map_alloc(union bpf_attr *attr)
 	numa_node = bpf_map_attr_numa_node(attr);
 	size = struct_size(m, xsk_map, attr->max_entries);
 
-	err = bpf_map_charge_init(&mem, size);
-	if (err < 0)
-		return ERR_PTR(err);
-
 	m = bpf_map_area_alloc(size, numa_node);
-	if (!m) {
-		bpf_map_charge_finish(&mem);
+	if (!m)
 		return ERR_PTR(-ENOMEM);
-	}
 
 	bpf_map_init_from_attr(&m->map, attr);
-	bpf_map_charge_move(&m->map.memory, &mem);
 	spin_lock_init(&m->lock);
 
 	return &m->map;
-- 
2.26.2