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authorAlexei Starovoitov <ast@kernel.org>2019-11-14 10:57:15 -0800
committerDaniel Borkmann <daniel@iogearbox.net>2019-11-15 23:44:48 +0100
commit91cc1a99740e2ed1d903b5906afb470cc5a07379 (patch)
treeea7c450f397b2f02a81cde66a5f1e4f5fb819c5c /include/linux/bpf_types.h
parent9cc31b3a092d9bf2a18f09ad77e727ddb42a5b1e (diff)
bpf: Annotate context types
Annotate BPF program context types with program-side type and kernel-side type. This type information is used by the verifier. btf_get_prog_ctx_type() is used in the later patches to verify that BTF type of ctx in BPF program matches to kernel expected ctx type. For example, the XDP program type is: BPF_PROG_TYPE(BPF_PROG_TYPE_XDP, xdp, struct xdp_md, struct xdp_buff) That means that XDP program should be written as: int xdp_prog(struct xdp_md *ctx) { ... } Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20191114185720.1641606-16-ast@kernel.org
Diffstat (limited to 'include/linux/bpf_types.h')
-rw-r--r--include/linux/bpf_types.h78
1 files changed, 52 insertions, 26 deletions
diff --git a/include/linux/bpf_types.h b/include/linux/bpf_types.h
index de14872b01ba..93740b3614d7 100644
--- a/include/linux/bpf_types.h
+++ b/include/linux/bpf_types.h
@@ -2,42 +2,68 @@
/* internal file - do not include directly */
#ifdef CONFIG_NET
-BPF_PROG_TYPE(BPF_PROG_TYPE_SOCKET_FILTER, sk_filter)
-BPF_PROG_TYPE(BPF_PROG_TYPE_SCHED_CLS, tc_cls_act)
-BPF_PROG_TYPE(BPF_PROG_TYPE_SCHED_ACT, tc_cls_act)
-BPF_PROG_TYPE(BPF_PROG_TYPE_XDP, xdp)
+BPF_PROG_TYPE(BPF_PROG_TYPE_SOCKET_FILTER, sk_filter,
+ struct __sk_buff, struct sk_buff)
+BPF_PROG_TYPE(BPF_PROG_TYPE_SCHED_CLS, tc_cls_act,
+ struct __sk_buff, struct sk_buff)
+BPF_PROG_TYPE(BPF_PROG_TYPE_SCHED_ACT, tc_cls_act,
+ struct __sk_buff, struct sk_buff)
+BPF_PROG_TYPE(BPF_PROG_TYPE_XDP, xdp,
+ struct xdp_md, struct xdp_buff)
#ifdef CONFIG_CGROUP_BPF
-BPF_PROG_TYPE(BPF_PROG_TYPE_CGROUP_SKB, cg_skb)
-BPF_PROG_TYPE(BPF_PROG_TYPE_CGROUP_SOCK, cg_sock)
-BPF_PROG_TYPE(BPF_PROG_TYPE_CGROUP_SOCK_ADDR, cg_sock_addr)
+BPF_PROG_TYPE(BPF_PROG_TYPE_CGROUP_SKB, cg_skb,
+ struct __sk_buff, struct sk_buff)
+BPF_PROG_TYPE(BPF_PROG_TYPE_CGROUP_SOCK, cg_sock,
+ struct bpf_sock, struct sock)
+BPF_PROG_TYPE(BPF_PROG_TYPE_CGROUP_SOCK_ADDR, cg_sock_addr,
+ struct bpf_sock_addr, struct bpf_sock_addr_kern)
#endif
-BPF_PROG_TYPE(BPF_PROG_TYPE_LWT_IN, lwt_in)
-BPF_PROG_TYPE(BPF_PROG_TYPE_LWT_OUT, lwt_out)
-BPF_PROG_TYPE(BPF_PROG_TYPE_LWT_XMIT, lwt_xmit)
-BPF_PROG_TYPE(BPF_PROG_TYPE_LWT_SEG6LOCAL, lwt_seg6local)
-BPF_PROG_TYPE(BPF_PROG_TYPE_SOCK_OPS, sock_ops)
-BPF_PROG_TYPE(BPF_PROG_TYPE_SK_SKB, sk_skb)
-BPF_PROG_TYPE(BPF_PROG_TYPE_SK_MSG, sk_msg)
-BPF_PROG_TYPE(BPF_PROG_TYPE_FLOW_DISSECTOR, flow_dissector)
+BPF_PROG_TYPE(BPF_PROG_TYPE_LWT_IN, lwt_in,
+ struct __sk_buff, struct sk_buff)
+BPF_PROG_TYPE(BPF_PROG_TYPE_LWT_OUT, lwt_out,
+ struct __sk_buff, struct sk_buff)
+BPF_PROG_TYPE(BPF_PROG_TYPE_LWT_XMIT, lwt_xmit,
+ struct __sk_buff, struct sk_buff)
+BPF_PROG_TYPE(BPF_PROG_TYPE_LWT_SEG6LOCAL, lwt_seg6local,
+ struct __sk_buff, struct sk_buff)
+BPF_PROG_TYPE(BPF_PROG_TYPE_SOCK_OPS, sock_ops,
+ struct bpf_sock_ops, struct bpf_sock_ops_kern)
+BPF_PROG_TYPE(BPF_PROG_TYPE_SK_SKB, sk_skb,
+ struct __sk_buff, struct sk_buff)
+BPF_PROG_TYPE(BPF_PROG_TYPE_SK_MSG, sk_msg,
+ struct sk_msg_md, struct sk_msg)
+BPF_PROG_TYPE(BPF_PROG_TYPE_FLOW_DISSECTOR, flow_dissector,
+ struct __sk_buff, struct bpf_flow_dissector)
#endif
#ifdef CONFIG_BPF_EVENTS
-BPF_PROG_TYPE(BPF_PROG_TYPE_KPROBE, kprobe)
-BPF_PROG_TYPE(BPF_PROG_TYPE_TRACEPOINT, tracepoint)
-BPF_PROG_TYPE(BPF_PROG_TYPE_PERF_EVENT, perf_event)
-BPF_PROG_TYPE(BPF_PROG_TYPE_RAW_TRACEPOINT, raw_tracepoint)
-BPF_PROG_TYPE(BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE, raw_tracepoint_writable)
-BPF_PROG_TYPE(BPF_PROG_TYPE_TRACING, tracing)
+BPF_PROG_TYPE(BPF_PROG_TYPE_KPROBE, kprobe,
+ bpf_user_pt_regs_t, struct pt_regs)
+BPF_PROG_TYPE(BPF_PROG_TYPE_TRACEPOINT, tracepoint,
+ __u64, u64)
+BPF_PROG_TYPE(BPF_PROG_TYPE_PERF_EVENT, perf_event,
+ struct bpf_perf_event_data, struct bpf_perf_event_data_kern)
+BPF_PROG_TYPE(BPF_PROG_TYPE_RAW_TRACEPOINT, raw_tracepoint,
+ struct bpf_raw_tracepoint_args, u64)
+BPF_PROG_TYPE(BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE, raw_tracepoint_writable,
+ struct bpf_raw_tracepoint_args, u64)
+BPF_PROG_TYPE(BPF_PROG_TYPE_TRACING, tracing,
+ void *, void *)
#endif
#ifdef CONFIG_CGROUP_BPF
-BPF_PROG_TYPE(BPF_PROG_TYPE_CGROUP_DEVICE, cg_dev)
-BPF_PROG_TYPE(BPF_PROG_TYPE_CGROUP_SYSCTL, cg_sysctl)
-BPF_PROG_TYPE(BPF_PROG_TYPE_CGROUP_SOCKOPT, cg_sockopt)
+BPF_PROG_TYPE(BPF_PROG_TYPE_CGROUP_DEVICE, cg_dev,
+ struct bpf_cgroup_dev_ctx, struct bpf_cgroup_dev_ctx)
+BPF_PROG_TYPE(BPF_PROG_TYPE_CGROUP_SYSCTL, cg_sysctl,
+ struct bpf_sysctl, struct bpf_sysctl_kern)
+BPF_PROG_TYPE(BPF_PROG_TYPE_CGROUP_SOCKOPT, cg_sockopt,
+ struct bpf_sockopt, struct bpf_sockopt_kern)
#endif
#ifdef CONFIG_BPF_LIRC_MODE2
-BPF_PROG_TYPE(BPF_PROG_TYPE_LIRC_MODE2, lirc_mode2)
+BPF_PROG_TYPE(BPF_PROG_TYPE_LIRC_MODE2, lirc_mode2,
+ __u32, u32)
#endif
#ifdef CONFIG_INET
-BPF_PROG_TYPE(BPF_PROG_TYPE_SK_REUSEPORT, sk_reuseport)
+BPF_PROG_TYPE(BPF_PROG_TYPE_SK_REUSEPORT, sk_reuseport,
+ struct sk_reuseport_md, struct sk_reuseport_kern)
#endif
BPF_MAP_TYPE(BPF_MAP_TYPE_ARRAY, array_map_ops)