tools/testing/selftests/bpf/progs/test_bpf_nf_fail.c
Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/test_bpf_nf_fail.c
File Facts
- System
- Linux kernel
- Corpus path
tools/testing/selftests/bpf/progs/test_bpf_nf_fail.c- Extension
.c- Size
- 4961 bytes
- Lines
- 207
- 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.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
vmlinux.hbpf/bpf_tracing.hbpf/bpf_helpers.hbpf/bpf_core_read.hbpf_misc.h
Detected Declarations
struct nf_connstruct bpf_ct_opts___localfunction alloc_releasefunction insert_insertfunction lookup_insertfunction write_not_allowlisted_fieldfunction set_timeout_after_insertfunction set_status_after_insertfunction change_timeout_after_allocfunction change_status_after_allocfunction __msgfunction __msgfunction __msgfunction __msg
Annotated Snippet
struct bpf_ct_opts___local {
s32 netns_id;
s32 error;
u8 l4proto;
u8 reserved[3];
} __attribute__((preserve_access_index));
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_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_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;
SEC("?tc")
int alloc_release(struct __sk_buff *ctx)
{
struct bpf_ct_opts___local opts = {};
struct bpf_sock_tuple tup = {};
struct nf_conn *ct;
ct = bpf_skb_ct_alloc(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
if (!ct)
return 0;
bpf_ct_release(ct);
return 0;
}
SEC("?tc")
int insert_insert(struct __sk_buff *ctx)
{
struct bpf_ct_opts___local opts = {};
struct bpf_sock_tuple tup = {};
struct nf_conn *ct;
ct = bpf_skb_ct_alloc(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
if (!ct)
return 0;
ct = bpf_ct_insert_entry(ct);
if (!ct)
return 0;
ct = bpf_ct_insert_entry(ct);
return 0;
}
SEC("?tc")
int lookup_insert(struct __sk_buff *ctx)
{
struct bpf_ct_opts___local opts = {};
struct bpf_sock_tuple tup = {};
struct nf_conn *ct;
ct = bpf_skb_ct_lookup(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
if (!ct)
return 0;
bpf_ct_insert_entry(ct);
return 0;
}
SEC("?tc")
int write_not_allowlisted_field(struct __sk_buff *ctx)
{
struct bpf_ct_opts___local opts = {};
struct bpf_sock_tuple tup = {};
struct nf_conn *ct;
ct = bpf_skb_ct_lookup(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
if (!ct)
return 0;
ct->status = 0xF00;
return 0;
}
SEC("?tc")
int set_timeout_after_insert(struct __sk_buff *ctx)
{
struct bpf_ct_opts___local opts = {};
struct bpf_sock_tuple tup = {};
struct nf_conn *ct;
ct = bpf_skb_ct_alloc(ctx, &tup, sizeof(tup.ipv4), &opts, sizeof(opts));
if (!ct)
Annotation
- Immediate include surface: `vmlinux.h`, `bpf/bpf_tracing.h`, `bpf/bpf_helpers.h`, `bpf/bpf_core_read.h`, `bpf_misc.h`.
- Detected declarations: `struct nf_conn`, `struct bpf_ct_opts___local`, `function alloc_release`, `function insert_insert`, `function lookup_insert`, `function write_not_allowlisted_field`, `function set_timeout_after_insert`, `function set_status_after_insert`, `function change_timeout_after_alloc`, `function change_status_after_alloc`.
- Atlas domain: Support Tooling And Documentation / tools.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.