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[bpf-next,v3,1/2] bpf: Change error code when ops is NULL

Message ID 20200426063635.130680-2-maowenan@huawei.com
State New
Headers show
Series [bpf-next,v3,1/2] bpf: Change error code when ops is NULL | expand

Commit Message

Mao Wenan April 26, 2020, 6:36 a.m. UTC 
There is one error printed when use BPF_MAP_TYPE_SOCKMAP to create map:
libbpf: failed to create map (name: 'sock_map'): Invalid argument(-22)

This is because CONFIG_BPF_STREAM_PARSER is not set, and
bpf_map_types[type] return invalid ops. It is not clear to show the
cause of config missing with return code -EINVAL.

Signed-off-by: Mao Wenan <maowenan@huawei.com>
---
 kernel/bpf/syscall.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index d85f37239540..8ae78c98d91e 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -113,7 +113,7 @@  static struct bpf_map *find_and_alloc_map(union bpf_attr *attr)
 	type = array_index_nospec(type, ARRAY_SIZE(bpf_map_types));
 	ops = bpf_map_types[type];
 	if (!ops)
-		return ERR_PTR(-EINVAL);
+		return ERR_PTR(-EOPNOTSUPP);
 
 	if (ops->map_alloc_check) {
 		err = ops->map_alloc_check(attr);