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bpf: Sync linux/bpf.h to tools/ 

Newly added program, context type and helper is used by tests in a
subsequent patch. Synchronize the header file.

Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200717103536.397595-12-jakub@cloudflare.com
This commit is contained in:
Jakub Sitnicki 2020-07-17 12:35:32 +02:00 committed by Alexei Starovoitov
parent 6d4201b138
commit a352b32ae9
1 changed files with 77 additions and 0 deletions
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77
tools/include/uapi/linux/bpf.h
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@ -189,6 +189,7 @@ enum bpf_prog_type {
BPF_PROG_TYPE_STRUCT_OPS,
BPF_PROG_TYPE_EXT,
BPF_PROG_TYPE_LSM,
BPF_PROG_TYPE_SK_LOOKUP,
};
enum bpf_attach_type {
@ -228,6 +229,7 @@ enum bpf_attach_type {
BPF_XDP_DEVMAP,
BPF_CGROUP_INET_SOCK_RELEASE,
BPF_XDP_CPUMAP,
BPF_SK_LOOKUP,
__MAX_BPF_ATTACH_TYPE
};
@ -3069,6 +3071,10 @@ union bpf_attr {
*
* long bpf_sk_assign(struct sk_buff *skb, struct bpf_sock *sk, u64 flags)
* Description
* Helper is overloaded depending on BPF program type. This
* description applies to **BPF_PROG_TYPE_SCHED_CLS** and
* **BPF_PROG_TYPE_SCHED_ACT** programs.
*
* Assign the *sk* to the *skb*. When combined with appropriate
* routing configuration to receive the packet towards the socket,
* will cause *skb* to be delivered to the specified socket.
@ -3094,6 +3100,56 @@ union bpf_attr {
* **-ESOCKTNOSUPPORT** if the socket type is not supported
* (reuseport).
*
* long bpf_sk_assign(struct bpf_sk_lookup *ctx, struct bpf_sock *sk, u64 flags)
* Description
* Helper is overloaded depending on BPF program type. This
* description applies to **BPF_PROG_TYPE_SK_LOOKUP** programs.
*
* Select the *sk* as a result of a socket lookup.
*
* For the operation to succeed passed socket must be compatible
* with the packet description provided by the *ctx* object.
*
* L4 protocol (**IPPROTO_TCP** or **IPPROTO_UDP**) must
* be an exact match. While IP family (**AF_INET** or
* **AF_INET6**) must be compatible, that is IPv6 sockets
* that are not v6-only can be selected for IPv4 packets.
*
* Only TCP listeners and UDP unconnected sockets can be
* selected. *sk* can also be NULL to reset any previous
* selection.
*
* *flags* argument can combination of following values:
*
* * **BPF_SK_LOOKUP_F_REPLACE** to override the previous
* socket selection, potentially done by a BPF program
* that ran before us.
*
* * **BPF_SK_LOOKUP_F_NO_REUSEPORT** to skip
* load-balancing within reuseport group for the socket
* being selected.
*
* On success *ctx->sk* will point to the selected socket.
*
* Return
* 0 on success, or a negative errno in case of failure.
*
* * **-EAFNOSUPPORT** if socket family (*sk->family*) is
* not compatible with packet family (*ctx->family*).
*
* * **-EEXIST** if socket has been already selected,
* potentially by another program, and
* **BPF_SK_LOOKUP_F_REPLACE** flag was not specified.
*
* * **-EINVAL** if unsupported flags were specified.
*
* * **-EPROTOTYPE** if socket L4 protocol
* (*sk->protocol*) doesn't match packet protocol
* (*ctx->protocol*).
*
* * **-ESOCKTNOSUPPORT** if socket is not in allowed
* state (TCP listening or UDP unconnected).
*
* u64 bpf_ktime_get_boot_ns(void)
* Description
* Return the time elapsed since system boot, in nanoseconds.
@ -3607,6 +3663,12 @@ enum {
BPF_RINGBUF_HDR_SZ = 8,
};
/* BPF_FUNC_sk_assign flags in bpf_sk_lookup context. */
enum {
BPF_SK_LOOKUP_F_REPLACE = (1ULL << 0),
BPF_SK_LOOKUP_F_NO_REUSEPORT = (1ULL << 1),
};
/* Mode for BPF_FUNC_skb_adjust_room helper. */
enum bpf_adj_room_mode {
BPF_ADJ_ROOM_NET,
@ -4349,4 +4411,19 @@ struct bpf_pidns_info {
__u32 pid;
__u32 tgid;
};
/* User accessible data for SK_LOOKUP programs. Add new fields at the end. */
struct bpf_sk_lookup {
__bpf_md_ptr(struct bpf_sock *, sk); /* Selected socket */
__u32 family; /* Protocol family (AF_INET, AF_INET6) */
__u32 protocol; /* IP protocol (IPPROTO_TCP, IPPROTO_UDP) */
__u32 remote_ip4; /* Network byte order */
__u32 remote_ip6[4]; /* Network byte order */
__u32 remote_port; /* Network byte order */
__u32 local_ip4; /* Network byte order */
__u32 local_ip6[4]; /* Network byte order */
__u32 local_port; /* Host byte order */
};
#endif /* _UAPI__LINUX_BPF_H__ */