tools/testing/selftests/bpf/progs/test_bpf_nf.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/test_bpf_nf.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/test_bpf_nf.c
Extension
.c
Size
9920 bytes
Lines
340
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

struct bpf_ct_opts___local {
	s32 netns_id;
	s32 error;
	u8 l4proto;
	u8 dir;
	u8 reserved[2];
};

struct bpf_ct_opts___new {
	s32 netns_id;
	s32 error;
	u8 l4proto;
	u8 dir;
	u16 ct_zone_id;
	u8 ct_zone_dir;
	u8 reserved[3];
} __attribute__((preserve_access_index));

struct nf_conn *bpf_xdp_ct_alloc(struct xdp_md *, struct bpf_sock_tuple *, u32,
				 struct bpf_ct_opts___local *, u32) __ksym;
struct nf_conn *bpf_xdp_ct_lookup(struct xdp_md *, struct bpf_sock_tuple *, u32,
				  struct bpf_ct_opts___local *, u32) __ksym;
struct nf_conn *bpf_skb_ct_alloc(struct __sk_buff *, struct bpf_sock_tuple *, u32,
				 struct bpf_ct_opts___local *, u32) __ksym;
struct nf_conn *bpf_skb_ct_lookup(struct __sk_buff *, struct bpf_sock_tuple *, u32,
				  struct bpf_ct_opts___local *, u32) __ksym;
struct nf_conn *bpf_ct_insert_entry(struct nf_conn *) __ksym;
void bpf_ct_release(struct nf_conn *) __ksym;
void bpf_ct_set_timeout(struct nf_conn *, u32) __ksym;
int bpf_ct_change_timeout(struct nf_conn *, u32) __ksym;
int bpf_ct_set_status(struct nf_conn *, u32) __ksym;
int bpf_ct_change_status(struct nf_conn *, u32) __ksym;
int bpf_ct_set_nat_info(struct nf_conn *, union nf_inet_addr *,
			int port, enum nf_nat_manip_type___local) __ksym;

static __always_inline void
nf_ct_test(struct nf_conn *(*lookup_fn)(void *, struct bpf_sock_tuple *, u32,
					struct bpf_ct_opts___local *, u32),
	   struct nf_conn *(*alloc_fn)(void *, struct bpf_sock_tuple *, u32,
				       struct bpf_ct_opts___local *, u32),
	   void *ctx)
{
	struct bpf_ct_opts___local opts_def = { .l4proto = IPPROTO_TCP, .netns_id = -1 };
	struct bpf_sock_tuple bpf_tuple;
	struct nf_conn *ct;

	__builtin_memset(&bpf_tuple, 0, sizeof(bpf_tuple.ipv4));

	opts_def.reserved[0] = 1;
	ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
		       sizeof(opts_def));
	opts_def.reserved[0] = 0;
	opts_def.l4proto = IPPROTO_TCP;
	if (ct)
		bpf_ct_release(ct);
	else
		test_einval_reserved = opts_def.error;

	opts_def.netns_id = -2;
	ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
		       sizeof(opts_def));
	opts_def.netns_id = -1;
	if (ct)
		bpf_ct_release(ct);
	else
		test_einval_netns_id = opts_def.error;

	ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
		       sizeof(opts_def) - 1);
	if (ct)
		bpf_ct_release(ct);
	else
		test_einval_len_opts = opts_def.error;

	opts_def.l4proto = IPPROTO_ICMP;
	ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
		       sizeof(opts_def));
	opts_def.l4proto = IPPROTO_TCP;
	if (ct)
		bpf_ct_release(ct);
	else
		test_eproto_l4proto = opts_def.error;

	opts_def.netns_id = 0xf00f;
	ct = lookup_fn(ctx, &bpf_tuple, sizeof(bpf_tuple.ipv4), &opts_def,
		       sizeof(opts_def));
	opts_def.netns_id = -1;
	if (ct)
		bpf_ct_release(ct);
	else

Annotation

Implementation Notes