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bpf, net: introduce bpf_struct_ops_desc.

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Move some of members of bpf_struct_ops to bpf_struct_ops_desc.  type_id is
unavailabe in bpf_struct_ops anymore. Modules should get it from the btf
received by kmod's init function.

Cc: netdev@vger.kernel.org
Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com>
Link: https://lore.kernel.org/r/20240119225005.668602-4-thinker.li@gmail.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
This commit is contained in:
Kui-Feng Lee
2024-01-19 14:49:54 -08:00
committed by Martin KaFai Lau
parent 9567839538
commit 4c5763ed99
5 changed files with 73 additions and 49 deletions
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8
kernel/bpf/verifier.c
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@@ -20285,6 +20285,7 @@ static void print_verification_stats(struct bpf_verifier_env *env)
static int check_struct_ops_btf_id(struct bpf_verifier_env *env)
{
const struct btf_type *t, *func_proto;
const struct bpf_struct_ops_desc *st_ops_desc;
const struct bpf_struct_ops *st_ops;
const struct btf_member *member;
struct bpf_prog *prog = env->prog;
@@ -20297,14 +20298,15 @@ static int check_struct_ops_btf_id(struct bpf_verifier_env *env)
}
btf_id = prog->aux->attach_btf_id;
st_ops = bpf_struct_ops_find(btf_id);
if (!st_ops) {
st_ops_desc = bpf_struct_ops_find(btf_id);
if (!st_ops_desc) {
verbose(env, "attach_btf_id %u is not a supported struct\n",
btf_id);
return -ENOTSUPP;
}
st_ops = st_ops_desc->st_ops;
t = st_ops->type;
t = st_ops_desc->type;
member_idx = prog->expected_attach_type;
if (member_idx >= btf_type_vlen(t)) {
verbose(env, "attach to invalid member idx %u of struct %s\n",