[RFC PATCH net-next 05/13] bpf: offload: allow PERCPU_ARRAY maps for offloaded programs

The knod BPF offload keeps hot per-CPU statistics in a PERCPU_ARRAY
map that is mirrored into accelerator memory and aggregated back on the
host.  Permit this map type on the offload path.

Signed-off-by: Taehee Yoo <[email protected]>
(cherry picked from commit c447c9012940d48c1ec20a8ebac8d779e7d5a6fa)
---
 kernel/bpf/offload.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/bpf/offload.c b/kernel/bpf/offload.c
index 0d6f5569588c..36e747a12cbe 100644
--- a/kernel/bpf/offload.c
+++ b/kernel/bpf/offload.c
@@ -510,7 +510,8 @@ struct bpf_map *bpf_map_offload_map_alloc(union bpf_attr *attr)
 	if (!capable(CAP_SYS_ADMIN))
 		return ERR_PTR(-EPERM);
 	if (attr->map_type != BPF_MAP_TYPE_ARRAY &&
-	    attr->map_type != BPF_MAP_TYPE_HASH)
+	    attr->map_type != BPF_MAP_TYPE_HASH &&
+	    attr->map_type != BPF_MAP_TYPE_PERCPU_ARRAY)
 		return ERR_PTR(-EINVAL);
 
 	offmap = bpf_map_area_alloc(sizeof(*offmap), NUMA_NO_NODE);
-- 
2.43.0