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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
Download Patch File Download Diff File Expand all files Collapse all files

8
net/ipv4/bpf_tcp_ca.c
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@@ -20,6 +20,7 @@ static u32 unsupported_ops[] = {
static const struct btf_type *tcp_sock_type;
static u32 tcp_sock_id, sock_id;
static const struct btf_type *tcp_congestion_ops_type;
static int bpf_tcp_ca_init(struct btf *btf)
{
@@ -36,6 +37,11 @@ static int bpf_tcp_ca_init(struct btf *btf)
tcp_sock_id = type_id;
tcp_sock_type = btf_type_by_id(btf, tcp_sock_id);
type_id = btf_find_by_name_kind(btf, "tcp_congestion_ops", BTF_KIND_STRUCT);
if (type_id < 0)
return -EINVAL;
tcp_congestion_ops_type = btf_type_by_id(btf, type_id);
return 0;
}
@@ -149,7 +155,7 @@ static u32 prog_ops_moff(const struct bpf_prog *prog)
u32 midx;
midx = prog->expected_attach_type;
t = bpf_tcp_congestion_ops.type;
t = tcp_congestion_ops_type;
m = &btf_type_member(t)[midx];
return __btf_member_bit_offset(t, m) / 8;